""" """

from __future__ import annotations

import base64
import hashlib
import json
import re
import shutil
import sys
import tempfile
from collections.abc import Iterable as IterableABC

from SYS.logger import log
from pathlib import Path
from typing import Any, Callable, Dict, Iterable, List, Optional, Sequence, Set
from dataclasses import dataclass, field
from SYS import models


@dataclass
class CmdletArg:
    """Represents a single cmdlet argument with optional enum choices."""

    name: str
    """Argument name, e.g., '-path' or 'location'"""
    type: str = "string"
    """Argument type: 'string', 'int', 'flag', 'enum', etc."""
    required: bool = False
    """Whether this argument is required"""
    description: str = ""
    """Human-readable description of the argument"""
    choices: List[str] = field(default_factory=list)
    """Optional list of valid choices for enum/autocomplete, e.g., ['hydrus', 'local', '0x0.st']"""
    alias: str = ""
    """Optional alias for the argument name, e.g., 'loc' for 'location'"""
    handler: Optional[Any] = None
    """Optional handler function/callable for processing this argument's value"""
    variadic: bool = False
    """Whether this argument accepts multiple values (consumes remaining positional args)"""
    usage: str = ""
    """dsf"""
    requires_db: bool = False
    """Whether this argument requires the local DB/library root to be configured."""

    # Query-mapping support:
    # Some cmdlets use a unified `-query` string. When configured, individual args
    # can be populated from fields inside `-query` (e.g., -query "hash:<sha256>").
    query_key: Optional[str] = None
    """Field name inside -query that maps to this argument (e.g., 'hash')."""
    query_aliases: List[str] = field(default_factory=list)
    """Additional field names inside -query that map to this argument."""
    query_only: bool = False
    """When True, do not accept a dedicated CLI flag for this arg; only map from -query."""

    def resolve(self, value: Any) -> Any:
        """Resolve/process the argument value using the handler if available.

        Args:
            value: The raw argument value to process

        Returns:
            Processed value from handler, or original value if no handler

        Example:
            # For STORAGE arg with a handler
            storage_path = SharedArgs.STORAGE.resolve('local')  # Returns Path.home() / "Videos"
        """
        if self.handler is not None and callable(self.handler):
            return self.handler(value)
        return value

    def to_flags(self) -> tuple[str, ...]:
        """Generate all flag variants (short and long form) for this argument.

        Returns a tuple of all valid flag forms for this argument, including:
        - Long form with double dash: --name
        - Single dash multi-char form: -name (for convenience)
        - Short form with single dash: -alias (if alias exists)

        For flags, also generates negation forms:
        - --no-name, -name (negation of multi-char form)
        - --no-name, -nalias (negation with alias)

        Returns:
                Tuple of flag strings, e.g., ('--archive', '-archive', '-arch')
                or for flags: ('--archive', '-archive', '-arch', '--no-archive', '-narch')

        Example:
                archive_flags = SharedArgs.ARCHIVE.to_flags()
                # Returns: ('--archive', '-archive', '-arch', '--no-archive', '-narch')

                storage_flags = SharedArgs.STORAGE.to_flags()
                # Returns: ('--storage', '-storage', '-s')
        """
        flags = [
            f"--{self.name}",
            f"-{self.name}"
        ]  # Both double-dash and single-dash variants

        # Add short form if alias exists
        if self.alias:
            flags.append(f"-{self.alias}")

        # Add negation forms for flag type
        if self.type == "flag":
            flags.append(f"--no-{self.name}")
            flags.append(f"-no{self.name}")  # Single-dash negation variant
            if self.alias:
                flags.append(f"-n{self.alias}")

        return tuple(flags)


def QueryArg(
    name: str,
    *,
    key: Optional[str] = None,
    aliases: Optional[Sequence[str]] = None,
    type: str = "string",
    required: bool = False,
    description: str = "",
    choices: Optional[Sequence[str]] = None,
    handler: Optional[Any] = None,
    query_only: bool = True,
) -> CmdletArg:
    """Create an argument that can be populated from `-query` fields.

    By default, this does NOT create a dedicated flag (query_only=True). This is
    useful for deprecating bloat flags like `-hash` while still making `hash:` a
    first-class, documented, reusable field.
    """
    return CmdletArg(
        name=str(name),
        type=str(type or "string"),
        required=bool(required),
        description=str(description or ""),
        choices=list(choices or []),
        handler=handler,
        query_key=str(key or name).strip().lower()
        if str(key or name).strip() else None,
        query_aliases=[
            str(a).strip().lower() for a in (aliases or []) if str(a).strip()
        ],
        query_only=bool(query_only),
    )


# ============================================================================
# SHARED ARGUMENTS - Reusable argument definitions across cmdlet
# ============================================================================


class SharedArgs:
    """Registry of shared CmdletArg definitions used across multiple cmdlet.

    This class provides a centralized location for common arguments so they're
    defined once and used consistently everywhere. Reduces duplication and ensures
    all cmdlet handle the same arguments identically.

    Example:
            CMDLET = Cmdlet(
                    name="my-cmdlet",
                    summary="Does something",
                    usage="my-cmdlet",
                    args=[
                            SharedArgs.QUERY,         # Use predefined shared arg (e.g., -query "hash:<sha256>")
                            SharedArgs.LOCATION,      # Use another shared arg
                            CmdletArg(...),           # Mix with custom args
                    ]
            )
    """

    # NOTE: This project no longer exposes a dedicated -hash flag.
    # Use SharedArgs.QUERY with `hash:` syntax instead (e.g., -query "hash:<sha256>").

    STORE = CmdletArg(
        name="store",
        type="enum",
        choices=[],  # Dynamically populated via get_store_choices()
        description="Selects store",
        query_key="store",
    )

    PATH = CmdletArg(
        name="path",
        type="string",
        choices=[],  # Dynamically populated via get_store_choices()
        description="Selects store",
    )

    URL = CmdletArg(
        name="url",
        type="string",
        description="http parser",
    )

    @staticmethod
    def get_store_choices(config: Optional[Dict[str, Any]] = None) -> List[str]:
        """Get list of available store backend names.

        This method dynamically discovers all configured storage backends
        instead of using a static list. Should be called when building
        autocomplete choices or validating store names.

        Args:
                config: Optional config dict. If not provided, will try to load from config module.

        Returns:
                List of backend names (e.g., ['default', 'test', 'home', 'work'])

        Example:
                SharedArgs.STORE.choices = SharedArgs.get_store_choices(config)
        """
        try:
            from Store import Store

            # If no config provided, try to load it
            if config is None:
                try:
                    from SYS.config import load_config
                except Exception:
                    return []

            store = Store(config)
            return store.list_backends()
        except Exception:
            # Fallback to empty list if FileStorage isn't available
            return []

    LOCATION = CmdletArg(
        "location",
        type="enum",
        choices=["hydrus",
                 "0x0",
                 "local"],
        required=True,
        description="Destination location",
    )

    DELETE_FLAG = CmdletArg(
        "delete",
        type="flag",
        description="Delete the file and its .tag after successful operation.",
    )

    # Metadata arguments
    ARTIST = CmdletArg(
        "artist",
        type="string",
        description="Filter by artist name (case-insensitive, partial match).",
    )

    ALBUM = CmdletArg(
        "album",
        type="string",
        description="Filter by album name (case-insensitive, partial match).",
    )

    TRACK = CmdletArg(
        "track",
        type="string",
        description="Filter by track title (case-insensitive, partial match).",
    )

    # Library/Search arguments
    LIBRARY = CmdletArg(
        "library",
        type="string",
        choices=["hydrus",
                 "local",
                 "soulseek",
                 "libgen",
                 "ftp"],
        description="Search library or source location.",
    )

    TIMEOUT = CmdletArg(
        "timeout",
        type="integer",
        description="Search or operation timeout in seconds."
    )

    LIMIT = CmdletArg(
        "limit",
        type="integer",
        description="Maximum number of results to return."
    )

    # Path/File arguments
    PATH = CmdletArg("path", type="string", description="File or directory path.")

    OUTPUT = CmdletArg("output", type="string", description="Output file path.")

    # Generic arguments
    QUERY = CmdletArg(
        "query",
        type="string",
        description="Unified query string (e.g., hash:<sha256>, hash:{<h1>,<h2>}).",
    )

    REASON = CmdletArg(
        "reason",
        type="string",
        description="Reason or explanation for the operation."
    )

    ARCHIVE = CmdletArg(
        "archive",
        type="flag",
        description=
        "Archive the URL to Wayback Machine, Archive.today, and Archive.ph (requires URL argument in cmdlet).",
        alias="arch",
    )

    @staticmethod
    def resolve_storage(
        storage_value: Optional[str],
        default: Optional[Path] = None
    ) -> Path:
        """Resolve a storage location name to a filesystem Path.

        Maps storage identifiers (hydrus, local, ftp) to their actual
        filesystem paths. This is the single source of truth for storage location resolution.
        Note: 0x0.st is now accessed via file providers (-provider 0x0), not storage.

        Args:
                storage_value: One of 'hydrus', 'local', 'ftp', or None
                default: Path to return if storage_value is None (defaults to Videos)

        Returns:
                Resolved Path object for the storage location

        Raises:
                ValueError: If storage_value is not a recognized storage type

        Example:
                # In a cmdlet:
                storage_path = SharedArgs.resolve_storage(parsed.storage)

                # With defaults:
                path = SharedArgs.resolve_storage(None)  # Returns home/Videos
                path = SharedArgs.resolve_storage('local')  # Returns home/Videos
                path = SharedArgs.resolve_storage('hydrus')  # Returns home/.hydrus/client_files
        """
        storage_map = {
            "local": Path.home() / "Videos",
            "hydrus": Path.home() / ".hydrus" / "client_files",
            "ftp": Path.home() / "FTP",
            "matrix": Path.home() / "Matrix",  # Placeholder, not used for upload path
        }

        if storage_value is None:
            return default or (Path.home() / "Videos")

        storage_lower = storage_value.lower()
        if storage_lower not in storage_map:
            raise ValueError(
                f"Unknown storage location '{storage_value}'. "
                f"Must be one of: {', '.join(storage_map.keys())}"
            )

        return storage_map[storage_lower]

    @classmethod
    def get(cls, name: str) -> Optional[CmdletArg]:
        """Get a shared argument by name.

        Args:
                name: Uppercase name like 'HASH', 'LOCATION', etc.

        Returns:
                CmdletArg if found, None otherwise

        Example:
                arg = SharedArgs.get('QUERY')  # Returns SharedArgs.QUERY
        """
        try:
            return getattr(cls, name.upper())
        except AttributeError:
            return None


@dataclass
class Cmdlet:
    """Represents a cmdlet with metadata and arguments.

    Example:
            cmd = Cmdlet(
                    name="add-file",
                    summary="Upload a media file",
                    usage="add-file <location>",
                    aliases=["add-file-alias"],
                    args=[
                            CmdletArg("location", required=True, description="Destination location"),
                            CmdletArg("-delete", type="flag", description="Delete after upload"),
                    ],
                    details=[
                            "- This is a detail line",
                            "- Another detail",
                    ]
            )

            # Access properties
            log(cmd.name)  # "add-file"
            log(cmd.summary)  # "Upload a media file"
            log(cmd.args[0].name)  # "location"
    """

    name: str
    """"""
    summary: str
    """One-line summary of the cmdlet"""
    usage: str
    """Usage string, e.g., 'add-file <location> [-delete]'"""
    alias: List[str] = field(default_factory=list)
    """List of aliases for this cmdlet, e.g., ['add', 'add-f']"""
    arg: List[CmdletArg] = field(default_factory=list)
    """List of arguments accepted by this cmdlet"""
    detail: List[str] = field(default_factory=list)
    """Detailed explanation lines (for help text)"""
    # Execution function: func(result, args, config) -> int
    exec: Optional[Callable[[Any,
                             Sequence[str],
                             Dict[str,
                                  Any]],
                            int]] = field(default=None)

    def _collect_names(self) -> List[str]:
        """Collect primary name plus aliases, de-duplicated and normalized."""
        names: List[str] = []
        if self.name:
            names.append(self.name)
        for alias in self.alias or []:
            if alias:
                names.append(alias)
        for alias in getattr(self, "aliases", None) or []:
            if alias:
                names.append(alias)

        seen: Set[str] = set()
        deduped: List[str] = []
        for name in names:
            key = name.replace("_", "-").lower()
            if key in seen:
                continue
            seen.add(key)
            deduped.append(name)
        return deduped

    def register(self) -> "Cmdlet":
        """Register this cmdlet's exec under its name and aliases."""
        if not callable(self.exec):
            return self
        try:
            from . import (
                register_callable as _register_callable,
            )  # Local import to avoid circular import cost
        except Exception:
            return self

        names = self._collect_names()
        if not names:
            return self

        _register_callable(names, self.exec)
        return self

    def get_flags(self, arg_name: str) -> set[str]:
        """Generate -name and --name flag variants for an argument.

        Args:
                arg_name: The argument name (e.g., 'library', 'tag', 'size')

        Returns:
                Set containing both single-dash and double-dash variants
                (e.g., {'-library', '--library'})

        Example:
                if low in cmdlet.get_flags('library'):
                        # handle library flag
        """
        return {f"-{arg_name}",
                f"--{arg_name}"}

    def build_flag_registry(self) -> Dict[str, set[str]]:
        """Build a registry of all flag variants for this cmdlet's arguments.

        Automatically generates all -name and --name variants for each argument.
        Useful for parsing command-line arguments without hardcoding flags.

        Returns:
                Dict mapping argument names to their flag sets
                (e.g., {'library': {'-library', '--library'}, 'tag': {'-tag', '--tag'}})

        Example:
                flags = cmdlet.build_flag_registry()

                if low in flags.get('library', set()):
                        # handle library
                elif low in flags.get('tag', set()):
                        # handle tag
        """
        return {
            arg.name: self.get_flags(arg.name)
            for arg in self.arg
        }


# Tag groups cache (loaded from JSON config file)
_TAG_GROUPS_CACHE: Optional[Dict[str, List[str]]] = None
_TAG_GROUPS_MTIME: Optional[float] = None

# Path to tag groups configuration (set by caller or lazily discovered)
TAG_GROUPS_PATH: Optional[Path] = None


def set_tag_groups_path(path: Path) -> None:
    """Set the path to the tag groups JSON file."""
    global TAG_GROUPS_PATH
    TAG_GROUPS_PATH = path


def parse_cmdlet_args(args: Sequence[str],
                      cmdlet_spec: Dict[str,
                                        Any] | Cmdlet) -> Dict[str,
                                                               Any]:
    """Parse command-line arguments based on cmdlet specification.

    Extracts argument values from command-line tokens using the argument names
    and types defined in the cmdlet metadata. Automatically supports single-dash
    and double-dash variants of flag names. Arguments without dashes in definition
    are treated as positional arguments.

    Args:
            args: Command-line arguments (e.g., ["-path", "/home/file.txt", "-foo", "bar"])
            cmdlet_spec: Cmdlet metadata dict with "args" key containing list of arg specs,
                         or a Cmdlet object. Each arg spec should have at least "name" key.
                         Argument names can be defined with or without prefixes.

    Returns:
            Dict mapping canonical arg names to their parsed values. If an arg is not
            provided, it will not be in the dict. Lookup will normalize prefixes.

    Example:
            cmdlet = {
                    "args": [
                            {"name": "path", "type": "string"},  # Positional - matches bare value or -path/--path
                            {"name": "count", "type": "int"}     # Positional - matches bare value or -count/--count
                    ]
            }
            result = parse_cmdlet_args(["value1", "-count", "5"], cmdlet)
            # result = {"path": "value1", "count": "5"}
    """
    result: Dict[str,
                 Any] = {}

    # Only accept Cmdlet objects
    if not isinstance(cmdlet_spec, Cmdlet):
        raise TypeError(f"Expected Cmdlet, got {type(cmdlet_spec).__name__}")

    # Build arg specs from cmdlet
    arg_specs: List[CmdletArg] = cmdlet_spec.arg
    positional_args: List[CmdletArg] = []  # args without prefix in definition
    flagged_args: List[CmdletArg] = []  # args with prefix in definition
    query_mapped_args: List[CmdletArg] = []

    arg_spec_map: Dict[str,
                       str] = {}  # prefix variant -> canonical name (without prefix)

    for spec in arg_specs:
        name = spec.name
        if not name:
            continue

        # Track args that can be populated from -query.
        try:
            if getattr(spec, "query_key", None):
                query_mapped_args.append(spec)
        except Exception:
            pass

        name_str = str(name)
        canonical_name = name_str.lstrip("-")

        # Query-only args do not register dedicated flags/positionals.
        try:
            if bool(getattr(spec, "query_only", False)):
                continue
        except Exception:
            pass

        # Determine if this is positional (no dashes in original definition)
        if "-" not in name_str:
            positional_args.append(spec)
        else:
            flagged_args.append(spec)

        # Register all prefix variants for flagged lookup
        arg_spec_map[canonical_name.lower()] = canonical_name  # bare name
        arg_spec_map[f"-{canonical_name}".lower()] = canonical_name  # single dash
        arg_spec_map[f"--{canonical_name}".lower()] = canonical_name  # double dash

    # Parse arguments
    i = 0
    positional_index = 0  # Track which positional arg we're on

    while i < len(args):
        token = str(args[i])
        token_lower = token.lower()

        # Legacy guidance: -hash/--hash was removed in favor of -query "hash:...".
        # However, some cmdlets may explicitly re-introduce a -hash flag.
        if token_lower in {"-hash",
                           "--hash"} and token_lower not in arg_spec_map:
            try:
                log(
                    'Legacy flag -hash is no longer supported. Use: -query "hash:<sha256>"',
                    file=sys.stderr,
                )
            except Exception:
                pass
            i += 1
            continue

        # Check if this token is a known flagged argument
        if token_lower in arg_spec_map:
            canonical_name = arg_spec_map[token_lower]
            spec = next(
                (
                    s for s in arg_specs
                    if str(s.name).lstrip("-").lower() == canonical_name.lower()
                ),
                None,
            )

            # Check if it's a flag type (which doesn't consume next value, just marks presence)
            is_flag = spec and spec.type == "flag"

            if is_flag:
                # For flags, just mark presence without consuming next token
                result[canonical_name] = True
                i += 1
            else:
                # For non-flags, consume next token as the value
                if i + 1 < len(args) and not str(args[i + 1]).startswith("-"):
                    value = args[i + 1]

                    # Check if variadic
                    is_variadic = spec and spec.variadic
                    if is_variadic:
                        if canonical_name not in result:
                            result[canonical_name] = []
                        elif not isinstance(result[canonical_name], list):
                            result[canonical_name] = [result[canonical_name]]
                        result[canonical_name].append(value)
                    else:
                        result[canonical_name] = value
                    i += 2
                else:
                    i += 1
        # Otherwise treat as positional if we have positional args remaining
        elif positional_index < len(positional_args):
            positional_spec = positional_args[positional_index]
            canonical_name = str(positional_spec.name).lstrip("-")
            is_variadic = positional_spec.variadic

            if is_variadic:
                # For variadic args, append to a list
                if canonical_name not in result:
                    result[canonical_name] = []
                elif not isinstance(result[canonical_name], list):
                    # Should not happen if logic is correct, but safety check
                    result[canonical_name] = [result[canonical_name]]

                result[canonical_name].append(token)
                # Do not increment positional_index so subsequent tokens also match this arg
                # Note: Variadic args should typically be the last positional argument
                i += 1
            else:
                result[canonical_name] = token
                positional_index += 1
                i += 1
        else:
            # Unknown token, skip it
            i += 1

    # Populate query-mapped args from the unified -query string.
    try:
        raw_query = result.get("query")
    except Exception:
        raw_query = None

    if query_mapped_args and raw_query is not None:
        try:
            from SYS.cli_syntax import parse_query as _parse_query

            parsed_query = _parse_query(str(raw_query))
            fields = parsed_query.get("fields",
                                      {}) if isinstance(parsed_query,
                                                        dict) else {}
            norm_fields = (
                {
                    str(k).strip().lower(): v
                    for k, v in fields.items()
                } if isinstance(fields,
                                dict) else {}
            )
        except Exception:
            norm_fields = {}

        for spec in query_mapped_args:
            canonical_name = str(getattr(spec, "name", "") or "").lstrip("-")
            if not canonical_name:
                continue
            # Do not override explicit flags.
            if canonical_name in result and result.get(canonical_name) not in (None,
                                                                               ""):
                continue
            try:
                key = str(getattr(spec, "query_key", "") or "").strip().lower()
                aliases = getattr(spec, "query_aliases", None)
                alias_list = [
                    str(a).strip().lower() for a in (aliases or []) if str(a).strip()
                ]
            except Exception:
                key = ""
                alias_list = []
            candidates = [k for k in [key, canonical_name] + alias_list if k]
            val = None
            for k in candidates:
                if k in norm_fields:
                    val = norm_fields.get(k)
                    break
            if val is None:
                continue
            try:
                result[canonical_name] = spec.resolve(val)
            except Exception:
                result[canonical_name] = val

    return result


def normalize_hash(hash_hex: Optional[str]) -> Optional[str]:
    """Normalize a hash string to lowercase, or return None if invalid.

    Args:
            hash_hex: String that should be a hex hash

    Returns:
            Lowercase hash string, or None if input is not a string or is empty
    """
    if not isinstance(hash_hex, str):
        return None
    text = hash_hex.strip().lower()
    if not text:
        return None
    if len(text) != 64:
        return None
    if not all(ch in "0123456789abcdef" for ch in text):
        return None
    return text


def parse_hash_query(query: Optional[str]) -> List[str]:
    """Parse a unified query string for `hash:` into normalized SHA256 hashes.

    Supported examples:
    - hash:<h1>
    - hash:<h1>,<h2>,<h3>
    - Hash: <h1> <h2> <h3>
    - hash:{<h1>, <h2>}

    Returns:
            List of unique normalized 64-hex SHA256 hashes.
    """
    import re

    q = str(query or "").strip()
    if not q:
        return []

    m = re.match(r"^hash(?:es)?\s*:\s*(.+)$", q, flags=re.IGNORECASE)
    if not m:
        return []

    rest = (m.group(1) or "").strip()
    if rest.startswith("{") and rest.endswith("}"):
        rest = rest[1:-1].strip()
    if rest.startswith("[") and rest.endswith("]"):
        rest = rest[1:-1].strip()

    raw_parts = [p.strip() for p in re.split(r"[\s,]+", rest) if p.strip()]
    out: List[str] = []
    for part in raw_parts:
        h = normalize_hash(part)
        if not h:
            continue
        if h not in out:
            out.append(h)
    return out


def parse_single_hash_query(query: Optional[str]) -> Optional[str]:
    """Parse `hash:` query and require exactly one hash."""
    hashes = parse_hash_query(query)
    if len(hashes) != 1:
        return None
    return hashes[0]


def get_hash_for_operation(
    override_hash: Optional[str],
    result: Any,
    field_name: str = "hash"
) -> Optional[str]:
    """Get normalized hash from override or result object, consolidating common pattern.

    Eliminates repeated pattern: normalize_hash(override) if override else normalize_hash(get_field(result, ...))

    Args:
            override_hash: Hash passed as command argument (takes precedence)
            result: Object containing hash field (fallback)
            field_name: Name of hash field in result object (default: "hash")

    Returns:
            Normalized hash string, or None if neither override nor result provides valid hash
    """
    if override_hash:
        return normalize_hash(override_hash)
    hash_value = (
        get_field(result,
                  field_name) or getattr(result,
                                         field_name,
                                         None) or getattr(result,
                                                          "hash",
                                                          None)
    )
    return normalize_hash(hash_value)


def fetch_hydrus_metadata(
    config: Any,
    hash_hex: str,
    *,
    store_name: Optional[str] = None,
    hydrus_client: Any = None,
    **kwargs,
) -> tuple[Optional[Dict[str,
                         Any]],
           Optional[int]]:
    """Fetch metadata from Hydrus for a given hash, consolidating common fetch pattern.

    Eliminates repeated boilerplate: client initialization, error handling, metadata extraction.

    Args:
            config: Configuration object (passed to hydrus_wrapper.get_client)
            hash_hex: File hash to fetch metadata for
            store_name: Optional Hydrus store name. When provided, do not fall back to a global/default Hydrus client.
            hydrus_client: Optional explicit Hydrus client. When provided, takes precedence.
            **kwargs: Additional arguments to pass to client.fetch_file_metadata()
                    Common: include_service_keys_to_tags, include_notes, include_file_url, include_duration, etc.

    Returns:
            Tuple of (metadata_dict, error_code)
            - metadata_dict: Dict from Hydrus (first item in metadata list) or None if unavailable
            - error_code: 0 on success, 1 on any error (suitable for returning from cmdlet execute())
    """
    from API import HydrusNetwork

    hydrus_wrapper = HydrusNetwork

    client = hydrus_client
    if client is None:
        if store_name:
            # Store specified: do not fall back to a global/default Hydrus client.
            try:
                from Store import Store

                store = Store(config)
                backend = store[str(store_name)]
                candidate = getattr(backend, "_client", None)
                if candidate is not None and hasattr(candidate, "fetch_file_metadata"):
                    client = candidate
            except Exception as exc:
                log(f"Hydrus client unavailable for store '{store_name}': {exc}")
                client = None
            if client is None:
                log(f"Hydrus client unavailable for store '{store_name}'")
                return None, 1
        else:
            try:
                client = hydrus_wrapper.get_client(config)
            except Exception as exc:
                log(f"Hydrus client unavailable: {exc}")
                return None, 1

            if client is None:
                log("Hydrus client unavailable")
                return None, 1

    try:
        payload = client.fetch_file_metadata(hashes=[hash_hex], **kwargs)
    except Exception as exc:
        log(f"Hydrus metadata fetch failed: {exc}")
        return None, 1

    items = payload.get("metadata") if isinstance(payload, dict) else None
    meta = items[0] if (
        isinstance(items,
                   list) and items and isinstance(items[0],
                                                  dict)
    ) else None

    return meta, 0


def get_field(obj: Any, field: str, default: Optional[Any] = None) -> Any:
    """Extract a field from either a dict or object with fallback default.

    Handles both dict.get(field) and getattr(obj, field) access patterns.
    Also handles lists by accessing the first element.
    For PipeObjects, checks the extra field as well.
    Used throughout cmdlet to uniformly access fields from mixed types.

    Args:
            obj: Dict, object, or list to extract from
            field: Field name to retrieve
            default: Value to return if field not found (default: None)

    Returns:
            Field value if found, otherwise the default value

    Examples:
            get_field(result, "hash")          # From dict or object
            get_field(result, "table", "unknown")  # With default
    """
    # Handle lists by accessing the first element
    if isinstance(obj, list):
        if not obj:
            return default
        obj = obj[0]

    if isinstance(obj, dict):
        return obj.get(field, default)
    else:
        # Try direct attribute access first
        value = getattr(obj, field, None)
        if value is not None:
            return value

        # For PipeObjects, also check the extra field
        extra_val = getattr(obj, "extra", None)
        if isinstance(extra_val, dict):
            return extra_val.get(field, default)

        return default


def should_show_help(args: Sequence[str]) -> bool:
    """Check if help flag was passed in arguments.

    Consolidates repeated pattern of checking for help flags across cmdlet.

    Args:
            args: Command arguments to check

    Returns:
            True if any help flag is present (-?, /?, --help, -h, help, --cmdlet)

    Examples:
            if should_show_help(args):
                    log(json.dumps(CMDLET, ensure_ascii=False, indent=2))
                    return 0
    """
    try:
        return any(
            str(a).lower() in {"-?",
                               "/?",
                               "--help",
                               "-h",
                               "help",
                               "--cmdlet"} for a in args
        )
    except Exception:
        return False


def looks_like_hash(candidate: Optional[str]) -> bool:
    """Check if a string looks like a SHA256 hash (64 hex chars).

    Args:
            candidate: String to test

    Returns:
            True if the string is 64 lowercase hex characters
    """
    if not isinstance(candidate, str):
        return False
    text = candidate.strip().lower()
    return len(text) == 64 and all(ch in "0123456789abcdef" for ch in text)


def pipeline_item_local_path(item: Any) -> Optional[str]:
    """Extract local file path from a pipeline item.

    Supports both dataclass objects with .path attribute and dicts.
    Returns None for HTTP/HTTPS url.

    Args:
            item: Pipeline item (PipelineItem dataclass, dict, or other)

    Returns:
            Local file path string, or None if item is not a local file
    """
    path_value: Optional[str] = None
    if hasattr(item, "path"):
        path_value = getattr(item, "path", None)
    elif isinstance(item, dict):
        raw = item.get("path") or item.get("url")
        path_value = str(raw) if raw is not None else None
    if not isinstance(path_value, str):
        return None
    text = path_value.strip()
    if not text:
        return None
    if text.lower().startswith(("http://", "https://")):
        return None
    return text


def collect_relationship_labels(
    payload: Any,
    label_stack: List[str] | None = None,
    mapping: Dict[str,
                  str] | None = None
) -> Dict[str,
          str]:
    """Recursively extract hash-to-label mappings from nested relationship data.

    Walks through nested dicts/lists looking for sha256-like strings (64 hex chars)
    and builds a mapping from hash to its path in the structure.

    Example:
            data = {
                    "duplicates": [
                            "abc123...",  # Will be mapped to "duplicates"
                            {"type": "related", "items": ["def456..."]}  # Will be mapped to "duplicates / type / items"
                    ]
            }
            result = collect_relationship_labels(data)
            # result = {"abc123...": "duplicates", "def456...": "duplicates / type / items"}

    Args:
            payload: Nested data structure (dict, list, string, etc.)
            label_stack: Internal use - tracks path during recursion
            mapping: Internal use - accumulates hash->label mappings

    Returns:
            Dict mapping hash strings to their path labels
    """
    if label_stack is None:
        label_stack = []
    if mapping is None:
        mapping = {}

    if isinstance(payload, dict):
        for key, value in payload.items():
            next_stack = label_stack
            if isinstance(key, str) and key:
                formatted = key.replace("_", " ").strip()
                next_stack = label_stack + [formatted]
            collect_relationship_labels(value, next_stack, mapping)
    elif isinstance(payload, (list, tuple, set)):
        for value in payload:
            collect_relationship_labels(value, label_stack, mapping)
    elif isinstance(payload, str) and looks_like_hash(payload):
        hash_value = payload.lower()
        if label_stack:
            label = " / ".join(item for item in label_stack if item)
        else:
            label = "related"
        mapping.setdefault(hash_value, label)

    return mapping


def parse_tag_arguments(arguments: Sequence[str]) -> List[str]:
    """Parse tag arguments from command line tokens.

    - Supports comma-separated tags.
    - Supports pipe namespace shorthand: "artist:A|B|C" -> artist:A, artist:B, artist:C.

    Args:
            arguments: Sequence of argument strings

    Returns:
            List of normalized tag strings (empty strings filtered out)
    """

    def _expand_pipe_namespace(text: str) -> List[str]:
        parts = text.split("|")
        expanded: List[str] = []
        last_ns: Optional[str] = None
        for part in parts:
            segment = part.strip()
            if not segment:
                continue
            if ":" in segment:
                ns, val = segment.split(":", 1)
                ns = ns.strip()
                val = val.strip()
                last_ns = ns or last_ns
                if last_ns and val:
                    expanded.append(f"{last_ns}:{val}")
                elif ns or val:
                    expanded.append(f"{ns}:{val}".strip(":"))
            else:
                if last_ns:
                    expanded.append(f"{last_ns}:{segment}")
                else:
                    expanded.append(segment)
        return expanded

    tags: List[str] = []
    for argument in arguments:
        for token in argument.split(","):
            text = token.strip()
            if not text:
                continue
            # Expand namespace shorthand with pipes
            pipe_expanded = _expand_pipe_namespace(text)
            for entry in pipe_expanded:
                candidate = entry.strip()
                if not candidate:
                    continue
                if ":" in candidate:
                    ns, val = candidate.split(":", 1)
                    ns = ns.strip()
                    val = val.strip()
                    candidate = f"{ns}:{val}" if ns or val else ""
                if candidate:
                    tags.append(candidate)
    return tags


def fmt_bytes(n: Optional[int]) -> str:
    """Format bytes as human-readable with 1 decimal place (MB/GB).

    Args:
            n: Number of bytes, or None

    Returns:
            Formatted string like "1.5 MB" or "2.0 GB", or "unknown"
    """
    if n is None or n < 0:
        return "unknown"
    gb = n / (1024.0 * 1024.0 * 1024.0)
    if gb >= 1.0:
        return f"{gb:.1f} GB"
    mb = n / (1024.0 * 1024.0)
    return f"{mb:.1f} MB"


def _normalise_tag_group_entry(value: Any) -> Optional[str]:
    """Internal: Normalize a single tag group entry."""
    if not isinstance(value, str):
        value = str(value)
    text = value.strip()
    return text or None


def _load_tag_groups() -> Dict[str, List[str]]:
    """Load tag group definitions from JSON file with caching."""
    global _TAG_GROUPS_CACHE, _TAG_GROUPS_MTIME, TAG_GROUPS_PATH

    # Auto-discover adjective.json if not set
    if TAG_GROUPS_PATH is None:
        # Try to find adjective.json in the script directory or helper subdirectory
        try:
            script_dir = Path(__file__).parent.parent

            # Check root directory
            candidate = script_dir / "adjective.json"
            if candidate.exists():
                TAG_GROUPS_PATH = candidate
            else:
                # Check helper directory
                candidate = script_dir / "helper" / "adjective.json"
                if candidate.exists():
                    TAG_GROUPS_PATH = candidate
        except Exception:
            pass

    if TAG_GROUPS_PATH is None:
        return {}

    path = TAG_GROUPS_PATH
    try:
        stat_result = path.stat()
    except FileNotFoundError:
        _TAG_GROUPS_CACHE = {}
        _TAG_GROUPS_MTIME = None
        return {}
    except OSError as exc:
        log(f"Failed to read tag groups: {exc}", file=sys.stderr)
        _TAG_GROUPS_CACHE = {}
        _TAG_GROUPS_MTIME = None
        return {}

    mtime = stat_result.st_mtime
    if _TAG_GROUPS_CACHE is not None and _TAG_GROUPS_MTIME == mtime:
        return _TAG_GROUPS_CACHE

    try:
        payload = json.loads(path.read_text(encoding="utf-8"))
    except (OSError, json.JSONDecodeError) as exc:
        log(f"Invalid tag group JSON ({path}): {exc}", file=sys.stderr)
        _TAG_GROUPS_CACHE = {}
        _TAG_GROUPS_MTIME = mtime
        return {}

    groups: Dict[str,
                 List[str]] = {}
    if isinstance(payload, dict):
        for key, value in payload.items():
            if not isinstance(key, str):
                continue
            name = key.strip().lower()
            if not name:
                continue
            members: List[str] = []
            if isinstance(value, list):
                for entry in value:
                    normalised = _normalise_tag_group_entry(entry)
                    if normalised:
                        members.append(normalised)
            elif isinstance(value, str):
                normalised = _normalise_tag_group_entry(value)
                if normalised:
                    members.extend(
                        token.strip() for token in normalised.split(",")
                        if token.strip()
                    )
            if members:
                groups[name] = members

    _TAG_GROUPS_CACHE = groups
    _TAG_GROUPS_MTIME = mtime
    return groups


def expand_tag_groups(raw_tags: Iterable[str]) -> List[str]:
    """Expand tag group references (e.g., {my_group}) into member tags.

    Tag groups are defined in JSON and can be nested. Groups are referenced
    with curly braces: {group_name}.

    Args:
            raw_tags: Sequence of tag strings, some may reference groups like "{group_name}"

    Returns:
            List of expanded tags with group references replaced
    """
    groups = _load_tag_groups()
    if not groups:
        return [tag for tag in raw_tags if isinstance(tag, str) and tag.strip()]

    def _expand(tokens: Iterable[str], seen: Set[str]) -> List[str]:
        result: List[str] = []
        for token in tokens:
            if not isinstance(token, str):
                continue
            candidate = token.strip()
            if not candidate:
                continue
            if candidate.startswith("{") and candidate.endswith("}") and len(candidate
                                                                             ) > 2:
                name = candidate[1:-1].strip().lower()
                if not name:
                    continue
                if name in seen:
                    log(
                        f"Tag group recursion detected for {{{name}}}; skipping",
                        file=sys.stderr
                    )
                    continue
                members = groups.get(name)
                if not members:
                    log(f"Unknown tag group {{{name}}}", file=sys.stderr)
                    result.append(candidate)
                    continue
                result.extend(_expand(members,
                                      seen | {name}))
            else:
                result.append(candidate)
        return result

    return _expand(raw_tags, set())


def first_title_tag(source: Optional[Iterable[str]]) -> Optional[str]:
    """Find the first tag starting with "title:" in a collection.

    Args:
            source: Iterable of tag strings

    Returns:
            First title: tag found, or None
    """
    if not source:
        return None
    for item in source:
        if not isinstance(item, str):
            continue
        candidate = item.strip()
        if candidate and candidate.lower().startswith("title:"):
            return candidate
    return None


def apply_preferred_title(tags: List[str], preferred: Optional[str]) -> List[str]:
    """Replace any title: tags with a preferred title tag.

    Args:
            tags: List of tags (may contain multiple "title:" entries)
            preferred: Preferred title tag to use (full "title: ..." format)

    Returns:
            List with old title tags removed and preferred title added (at most once)
    """
    if not preferred:
        return tags
    preferred_clean = preferred.strip()
    if not preferred_clean:
        return tags
    preferred_lower = preferred_clean.lower()
    filtered: List[str] = []
    has_preferred = False
    for tag in tags:
        candidate = tag.strip()
        if not candidate:
            continue
        if candidate.lower().startswith("title:"):
            if candidate.lower() == preferred_lower:
                if not has_preferred:
                    filtered.append(candidate)
                    has_preferred = True
            continue
        filtered.append(candidate)
    if not has_preferred:
        filtered.append(preferred_clean)
    return filtered


# ============================================================================
# PIPEOBJECT UTILITIES (for chainable cmdlet and multi-action pipelines)
# ============================================================================


def create_pipe_object_result(
    source: str,
    identifier: str,
    file_path: str,
    cmdlet_name: str,
    title: Optional[str] = None,
    hash_value: Optional[str] = None,
    is_temp: bool = False,
    parent_hash: Optional[str] = None,
    tag: Optional[List[str]] = None,
    **extra: Any,
) -> Dict[str,
          Any]:
    """Create a PipeObject-compatible result dict for pipeline chaining.

    This is a helper to emit results in the standard format that downstream
    cmdlet can process (filter, tag, cleanup, etc.).

    Args:
            source: Source system (e.g., 'local', 'hydrus', 'download')
            identifier: Unique ID from source
            file_path: Path to the file
            cmdlet_name: Name of the cmdlet that created this (e.g., 'download-data', 'screen-shot')
            title: Human-readable title
            hash_value: SHA-256 hash of file (for integrity)
            is_temp: If True, this is a temporary/intermediate artifact
            parent_hash: Hash of the parent file in the chain (for provenance)
            tag: List of tag values to apply
            **extra: Additional fields

    Returns:
            Dict with all PipeObject fields for emission
    """
    result: Dict[str, Any] = {
        "source": source,
        "id": identifier,
        "path": file_path,
        "action": f"cmdlet:{cmdlet_name}",  # Format: cmdlet:cmdlet_name
    }

    if title:
        result["title"] = title
    if hash_value:
        result["hash"] = hash_value
    if is_temp:
        result["is_temp"] = True
    if parent_hash:
        result["parent_hash"] = parent_hash
    if tag:
        result["tag"] = tag

    # Canonical store field: use source for compatibility
    try:
        if source:
            result["store"] = source
    except Exception:
        pass

    # Add any extra fields
    result.update(extra)

    return result


def mark_as_temp(pipe_object: Dict[str, Any]) -> Dict[str, Any]:
    """Mark a PipeObject dict as temporary (intermediate artifact).

    Args:
            pipe_object: Result dict from cmdlet emission

    Returns:
            Modified dict with is_temp=True
    """
    pipe_object["is_temp"] = True
    return pipe_object


def set_parent_hash(pipe_object: Dict[str, Any], parent_hash: str) -> Dict[str, Any]:
    """Set the parent_hash for provenance tracking.

    Args:
            pipe_object: Result dict
            parent_hash: Parent file's hash

    Returns:
            Modified dict with parent_hash set to the hash
    """
    pipe_object["parent_hash"] = parent_hash
    return pipe_object


def get_pipe_object_path(pipe_object: Any) -> Optional[str]:
    """Extract file path from PipeObject, dict, or pipeline-friendly object."""
    if pipe_object is None:
        return None
    for attr in ("path", "target"):
        if hasattr(pipe_object, attr):
            value = getattr(pipe_object, attr)
            if value:
                return value
    if isinstance(pipe_object, dict):
        for key in ("path", "target"):
            value = pipe_object.get(key)
            if value:
                return value
    return None


def _extract_flag_value(args: Sequence[str], *flags: str) -> Optional[str]:
    """Return the value for the first matching flag in args.

    This is intentionally lightweight (no cmdlet spec required) so callers in CLI/pipeline
    can share the same behavior.
    """
    if not args:
        return None
    want = {str(f).strip().lower()
            for f in flags if str(f).strip()}
    if not want:
        return None
    try:
        tokens = [str(a) for a in args]
    except Exception:
        tokens = list(args)  # type: ignore[list-item]
    for i, tok in enumerate(tokens):
        low = str(tok).strip().lower()
        if low in want:
            if i + 1 >= len(tokens):
                return None
            nxt = str(tokens[i + 1])
            # Allow paths like "-"? Treat missing value as None.
            if not nxt.strip():
                return None
            # Don't consume another flag as value.
            if nxt.startswith("-"):
                return None
            return nxt
    return None


def _unique_destination_path(dest: Path) -> Path:
    """Generate a non-colliding destination path by appending " (N)"."""
    try:
        if not dest.exists():
            return dest
    except Exception:
        return dest

    parent = dest.parent
    stem = dest.stem
    suffix = dest.suffix
    for i in range(1, 10_000):
        candidate = parent / f"{stem} ({i}){suffix}"
        try:
            if not candidate.exists():
                return candidate
        except Exception:
            return candidate
    return dest


def _print_live_safe_stderr(message: str) -> None:
    """Print to stderr without breaking Rich Live progress output."""
    try:
        from SYS.rich_display import stderr_console  # type: ignore
    except Exception:
        return

    cm = None
    try:
        from SYS import pipeline as _pipeline_ctx  # type: ignore

        suspend = getattr(_pipeline_ctx, "suspend_live_progress", None)
        cm = suspend() if callable(suspend) else None
    except Exception:
        cm = None

    try:
        from contextlib import nullcontext
    except Exception:
        nullcontext = None  # type: ignore
    if cm is None:
        cm = nullcontext() if callable(nullcontext) else None

    try:
        if cm is not None:
            with cm:
                stderr_console.print(str(message))
        else:
            stderr_console.print(str(message))
    except Exception:
        return


def apply_output_path_from_pipeobjects(
    *,
    cmd_name: str,
    args: Sequence[str],
    emits: Sequence[Any],
) -> List[Any]:
    """If the user supplied `-path`, move emitted temp/PATH files there.

    This enables a dynamic pattern:
    - Any cmdlet can include `SharedArgs.PATH`.
    - If it emits a file-backed PipeObject (`path` exists on disk) and the item is
      a temp/PATH artifact, then `-path <dest>` will save it to that location.

    Rules:
    - Only affects items whose `action` matches the current cmdlet.
    - Only affects items that look like local artifacts (`is_temp` True or `store` == PATH).
    - Updates the emitted object's `path` (and `target` when it points at the same file).
    """
    dest_raw = _extract_flag_value(args, "-path", "--path")
    if not dest_raw:
        return list(emits or [])

    # Guard: users sometimes pass a URL into -path by mistake (e.g. `-path https://...`).
    # Treat that as invalid for filesystem moves and avoid breaking Rich Live output.
    try:
        dest_str = str(dest_raw).strip()
        if "://" in dest_str:
            _print_live_safe_stderr(
                f"Ignoring -path value that looks like a URL: {dest_str}"
            )
            return list(emits or [])
    except Exception:
        pass

    cmd_norm = str(cmd_name or "").replace("_", "-").strip().lower()
    if not cmd_norm:
        return list(emits or [])

    try:
        dest_hint_dir = str(dest_raw).endswith(("/", "\\"))
    except Exception:
        dest_hint_dir = False

    try:
        dest_path = Path(str(dest_raw)).expanduser()
    except Exception:
        return list(emits or [])

    items = list(emits or [])
    # Identify which emitted items are actually file artifacts produced by this cmdlet.
    artifact_indices: List[int] = []
    artifact_paths: List[Path] = []
    for idx, item in enumerate(items):
        action = str(get_field(item, "action", "") or "").strip().lower()
        if not action.startswith("cmdlet:"):
            continue
        action_name = action.split(":", 1)[-1].strip().lower()
        if action_name != cmd_norm:
            continue

        store = str(get_field(item, "store", "") or "").strip().lower()
        is_temp = bool(get_field(item, "is_temp", False))
        if not (is_temp or store == "path"):
            continue

        src_str = get_pipe_object_path(item)
        if not src_str:
            continue
        try:
            src = Path(str(src_str)).expanduser()
        except Exception:
            continue
        try:
            if not src.exists() or not src.is_file():
                continue
        except Exception:
            continue

        artifact_indices.append(idx)
        artifact_paths.append(src)

    if not artifact_indices:
        return items

    # Decide whether the destination is a directory or a single file.
    if len(artifact_indices) > 1:
        # Multiple artifacts: always treat destination as a directory.
        if dest_path.suffix:
            dest_dir = dest_path.parent
        else:
            dest_dir = dest_path
        try:
            dest_dir.mkdir(parents=True, exist_ok=True)
        except Exception as exc:
            _print_live_safe_stderr(
                f"Failed to create destination directory: {dest_dir} ({exc})"
            )
            return items

        for idx, src in zip(artifact_indices, artifact_paths):
            final = dest_dir / src.name
            final = _unique_destination_path(final)
            try:
                if src.resolve() == final.resolve():
                    _apply_saved_path_update(
                        items[idx],
                        old_path=str(src),
                        new_path=str(final)
                    )
                    _print_saved_output_panel(items[idx], final)
                    continue
            except Exception:
                pass
            try:
                shutil.move(str(src), str(final))
            except Exception as exc:
                _print_live_safe_stderr(f"Failed to save output to {final}: {exc}")
                continue
            _apply_saved_path_update(items[idx], old_path=str(src), new_path=str(final))
            _print_saved_output_panel(items[idx], final)

        return items

    # Single artifact: destination can be a directory or a concrete file path.
    src = artifact_paths[0]
    idx = artifact_indices[0]
    final: Path
    try:
        if dest_hint_dir or (dest_path.exists() and dest_path.is_dir()):
            final = dest_path / src.name
        else:
            final = dest_path
    except Exception:
        final = dest_path

    try:
        final.parent.mkdir(parents=True, exist_ok=True)
    except Exception as exc:
        _print_live_safe_stderr(
            f"Failed to create destination directory: {final.parent} ({exc})"
        )
        return items

    final = _unique_destination_path(final)
    try:
        if src.resolve() != final.resolve():
            shutil.move(str(src), str(final))
    except Exception as exc:
        _print_live_safe_stderr(f"Failed to save output to {final}: {exc}")
        return items

    _apply_saved_path_update(items[idx], old_path=str(src), new_path=str(final))
    _print_saved_output_panel(items[idx], final)
    return items


def _print_saved_output_panel(item: Any, final_path: Path) -> None:
    """When -path is used, print a Rich panel summarizing the saved output.

    Shows: Title, Location, Hash.
    Best-effort: reads existing fields first to avoid recomputing hashes.
    """
    try:
        from rich.panel import Panel  # type: ignore
        from rich.table import Table  # type: ignore
        from SYS.rich_display import stderr_console  # type: ignore
    except Exception:
        return

    # If Rich Live progress is active, pause it while printing so the panel
    # doesn't get overwritten/truncated by Live's cursor control.
    try:
        from SYS import pipeline as _pipeline_ctx  # type: ignore

        suspend = getattr(_pipeline_ctx, "suspend_live_progress", None)
        cm = suspend() if callable(suspend) else None
    except Exception:
        cm = None

    try:
        from contextlib import nullcontext
    except Exception:
        nullcontext = None  # type: ignore

    if cm is None:
        cm = nullcontext() if callable(nullcontext) else None

    try:
        location = str(final_path)
    except Exception:
        location = ""

    title = ""
    try:
        title = str(get_field(item, "title") or get_field(item, "name") or "").strip()
    except Exception:
        title = ""
    if not title:
        try:
            title = str(final_path.stem or final_path.name)
        except Exception:
            title = ""

    file_hash = ""
    try:
        file_hash = str(get_field(item,
                                  "hash") or get_field(item,
                                                       "sha256") or "").strip()
    except Exception:
        file_hash = ""
    if not file_hash:
        try:
            from SYS.utils import sha256_file  # type: ignore

            file_hash = str(sha256_file(final_path) or "").strip()
        except Exception:
            file_hash = ""

    grid = Table.grid(padding=(0, 1))
    grid.add_column(justify="right", style="bold")
    grid.add_column()
    grid.add_row("Title", title or "(unknown)")
    grid.add_row("Location", location or "(unknown)")
    grid.add_row("Hash", file_hash or "(unknown)")

    try:
        if cm is not None:
            with cm:
                stderr_console.print(Panel(grid, title="Saved", expand=False))
        else:
            stderr_console.print(Panel(grid, title="Saved", expand=False))
    except Exception:
        return


def _apply_saved_path_update(item: Any, *, old_path: str, new_path: str) -> None:
    """Update a PipeObject-like item after its backing file has moved."""
    old_str = str(old_path)
    new_str = str(new_path)
    if isinstance(item, dict):
        try:
            if str(item.get("path") or "") == old_str:
                item["path"] = new_str
        except Exception:
            pass
        try:
            if str(item.get("target") or "") == old_str:
                item["target"] = new_str
        except Exception:
            pass
        try:
            extra = item.get("extra")
            if isinstance(extra, dict):
                if str(extra.get("target") or "") == old_str:
                    extra["target"] = new_str
                if str(extra.get("path") or "") == old_str:
                    extra["path"] = new_str
        except Exception:
            pass
        return

    # models.PipeObject or PipeObject-ish
    try:
        if getattr(item, "path", None) == old_str:
            setattr(item, "path", new_str)
    except Exception:
        pass
    try:
        extra = getattr(item, "extra", None)
        if isinstance(extra, dict):
            if str(extra.get("target") or "") == old_str:
                extra["target"] = new_str
            if str(extra.get("path") or "") == old_str:
                extra["path"] = new_str
    except Exception:
        pass


def get_pipe_object_hash(pipe_object: Any) -> Optional[str]:
    """Extract file hash from PipeObject, dict, or pipeline-friendly object."""
    if pipe_object is None:
        return None
    for attr in ("hash",
                 ):
        if hasattr(pipe_object, attr):
            value = getattr(pipe_object, attr)
            if value:
                return value
    if isinstance(pipe_object, dict):
        for key in ("hash",
                    ):
            value = pipe_object.get(key)
            if value:
                return value
    return None


def normalize_result_input(result: Any) -> List[Dict[str, Any]]:
    """Normalize input result to a list of dicts.

    Handles:
    - None -> []
    - Dict -> [dict]
    - List of dicts -> list as-is
    - PipeObject -> [dict]
    - List of PipeObjects -> list of dicts

    Args:
            result: Result from piped input

    Returns:
            List of result dicts (may be empty)
    """
    if result is None:
        return []

    # Single dict
    if isinstance(result, dict):
        return [result]

    # List - convert each item to dict if needed
    if isinstance(result, list):
        output = []
        for item in result:
            if isinstance(item, dict):
                output.append(item)
            elif hasattr(item, "to_dict"):
                output.append(item.to_dict())
            else:
                # Try as-is
                output.append(item)
        return output

    # PipeObject or other object with to_dict
    if hasattr(result, "to_dict"):
        return [result.to_dict()]

    # Fallback: wrap it
    if isinstance(result, dict):
        return [result]

    return []


def filter_results_by_temp(results: List[Any], include_temp: bool = False) -> List[Any]:
    """Filter results by temporary status.

    Args:
            results: List of result dicts or PipeObjects
            include_temp: If True, keep temp files; if False, exclude them

    Returns:
            Filtered list
    """
    if include_temp:
        return results

    filtered = []
    for result in results:
        is_temp = False

        # Check PipeObject
        if hasattr(result, "is_temp"):
            is_temp = result.is_temp
        # Check dict
        elif isinstance(result, dict):
            is_temp = result.get("is_temp", False)

        if not is_temp:
            filtered.append(result)

    return filtered


def merge_sequences(*sources: Optional[Iterable[Any]],
                    case_sensitive: bool = True) -> list[str]:
    """Merge iterable sources while preserving order and removing duplicates."""
    seen: set[str] = set()
    merged: list[str] = []
    for source in sources:
        if not source:
            continue
        if isinstance(source, str) or not isinstance(source, IterableABC):
            iterable = [source]
        else:
            iterable = source
        for value in iterable:
            if value is None:
                continue
            text = str(value).strip()
            if not text:
                continue
            key = text if case_sensitive else text.lower()
            if key in seen:
                continue
            seen.add(key)
            merged.append(text)
    return merged


def collapse_namespace_tags(
    tags: Optional[Iterable[Any]],
    namespace: str,
    prefer: str = "last"
) -> list[str]:
    """Reduce tags so only one entry for a given namespace remains.

    Keeps either the first or last occurrence (default last) while preserving overall order
    for non-matching tags. Useful for ensuring a single title: tag.
    """
    if not tags:
        return []
    ns = str(namespace or "").strip().lower()
    if not ns:
        return list(tags) if isinstance(tags, list) else list(tags)

    prefer_last = str(prefer or "last").lower() != "first"
    ns_prefix = ns + ":"

    items = list(tags)
    if prefer_last:
        kept: list[str] = []
        seen_ns = False
        for tag in reversed(items):
            text = str(tag)
            if text.lower().startswith(ns_prefix):
                if seen_ns:
                    continue
                seen_ns = True
            kept.append(text)
        kept.reverse()
        return kept
    else:
        kept_ns = False
        result: list[str] = []
        for tag in items:
            text = str(tag)
            if text.lower().startswith(ns_prefix):
                if kept_ns:
                    continue
                kept_ns = True
            result.append(text)
        return result


def collapse_namespace_tag(
    tags: Optional[Iterable[Any]],
    namespace: str,
    prefer: str = "last"
) -> list[str]:
    """Singular alias for collapse_namespace_tags.

    Some cmdlet prefer the singular name; keep behavior centralized.
    """
    return collapse_namespace_tags(tags, namespace, prefer=prefer)


def extract_tag_from_result(result: Any) -> list[str]:
    tag: list[str] = []
    if isinstance(result, models.PipeObject):
        tag.extend(result.tag or [])
        if isinstance(result.extra, dict):
            extra_tag = result.extra.get("tag")
            if isinstance(extra_tag, list):
                tag.extend(extra_tag)
            elif isinstance(extra_tag, str):
                tag.append(extra_tag)
    elif hasattr(result, "tag"):
        # Handle objects with tag attribute (e.g. SearchResult)
        val = getattr(result, "tag")
        if isinstance(val, (list, set, tuple)):
            tag.extend(val)
        elif isinstance(val, str):
            tag.append(val)

    if isinstance(result, dict):
        raw_tag = result.get("tag")
        if isinstance(raw_tag, list):
            tag.extend(raw_tag)
        elif isinstance(raw_tag, str):
            tag.append(raw_tag)
        extra = result.get("extra")
        if isinstance(extra, dict):
            extra_tag = extra.get("tag")
            if isinstance(extra_tag, list):
                tag.extend(extra_tag)
            elif isinstance(extra_tag, str):
                tag.append(extra_tag)
    return merge_sequences(tag, case_sensitive=True)


def extract_title_from_result(result: Any) -> Optional[str]:
    """Extract the title from a result dict or PipeObject."""
    if isinstance(result, models.PipeObject):
        return result.title
    elif hasattr(result, "title"):
        return getattr(result, "title")
    elif isinstance(result, dict):
        return result.get("title")
    return None


def extract_url_from_result(result: Any) -> list[str]:
    url: list[str] = []

    def _extend(candidate: Any) -> None:
        if not candidate:
            return
        if isinstance(candidate, list):
            url.extend(candidate)
        elif isinstance(candidate, str):
            url.append(candidate)

    if isinstance(result, models.PipeObject):
        _extend(result.extra.get("url"))
        _extend(result.extra.get("url"))  # Also check singular url
        if isinstance(result.metadata, dict):
            _extend(result.metadata.get("url"))
            _extend(result.metadata.get("url"))
            _extend(result.metadata.get("url"))
    elif hasattr(result, "url") or hasattr(result, "url"):
        # Handle objects with url/url attribute
        _extend(getattr(result, "url", None))
        _extend(getattr(result, "url", None))

    if isinstance(result, dict):
        _extend(result.get("url"))
        _extend(result.get("url"))
        _extend(result.get("url"))
        extra = result.get("extra")
        if isinstance(extra, dict):
            _extend(extra.get("url"))
            _extend(extra.get("url"))
            _extend(extra.get("url"))

    return merge_sequences(url, case_sensitive=True)


def extract_relationships(result: Any) -> Optional[Dict[str, Any]]:
    if isinstance(result, models.PipeObject):
        relationships = result.get_relationships()
        return relationships or None
    if isinstance(result, dict):
        relationships = result.get("relationships")
        if isinstance(relationships, dict) and relationships:
            return relationships
    return None


def extract_duration(result: Any) -> Optional[float]:
    duration = None
    if isinstance(result, models.PipeObject):
        duration = result.duration
    elif isinstance(result, dict):
        duration = result.get("duration")
        if duration is None:
            metadata = result.get("metadata")
            if isinstance(metadata, dict):
                duration = metadata.get("duration")
    if duration is None:
        return None
    try:
        return float(duration)
    except (TypeError, ValueError):
        return None


def coerce_to_pipe_object(
    value: Any,
    default_path: Optional[str] = None
) -> models.PipeObject:
    """Normalize any incoming result to a PipeObject for single-source-of-truth state.

    Uses hash+store canonical pattern.
    """
    # Debug: Print ResultItem details if coming from search_file.py
    try:
        from SYS.logger import is_debug_enabled, debug

        if (is_debug_enabled() and hasattr(value,
                                           "__class__")
                and value.__class__.__name__ == "ResultItem"):
            debug("[ResultItem -> PipeObject conversion]")
            debug(f"  title={getattr(value, 'title', None)}")
            debug(f"  target={getattr(value, 'target', None)}")
            debug(f"  hash={getattr(value, 'hash', None)}")
            debug(f"  media_kind={getattr(value, 'media_kind', None)}")
            debug(f"  tag={getattr(value, 'tag', None)}")
            debug(f"  tag_summary={getattr(value, 'tag_summary', None)}")
            debug(f"  size_bytes={getattr(value, 'size_bytes', None)}")
            debug(f"  duration_seconds={getattr(value, 'duration_seconds', None)}")
            debug(f"  relationships={getattr(value, 'relationships', None)}")
            debug(f"  url={getattr(value, 'url', None)}")
            debug(
                f"  full_metadata keys={list(getattr(value, 'full_metadata', {}).keys()) if hasattr(value, 'full_metadata') and value.full_metadata else []}"
            )
    except Exception:
        pass

    if isinstance(value, models.PipeObject):
        return value

    known_keys = {
        "hash",
        "store",
        "tag",
        "title",
        "url",
        "source_url",
        "duration",
        "metadata",
        "warnings",
        "path",
        "relationships",
        "is_temp",
        "action",
        "parent_hash",
    }

    # Convert common object-like results into a dict so we can preserve fields like
    # hash/store/url when they come from result tables (e.g., get-url emits UrlItem).
    #
    # Priority:
    # 1) explicit to_dict()
    # 2) best-effort attribute extraction for known PipeObject-ish fields
    if hasattr(value, "to_dict"):
        value = value.to_dict()
    elif not isinstance(value, dict):
        try:
            obj_map: Dict[str,
                          Any] = {}
            for k in (
                    "hash",
                    "store",
                    "provider",
                    "prov",
                    "tag",
                    "title",
                    "url",
                    "source_url",
                    "duration",
                    "duration_seconds",
                    "metadata",
                    "full_metadata",
                    "warnings",
                    "path",
                    "target",
                    "relationships",
                    "is_temp",
                    "action",
                    "parent_hash",
                    "extra",
                    "media_kind",
            ):
                if hasattr(value, k):
                    obj_map[k] = getattr(value, k)
            if obj_map:
                value = obj_map
        except Exception:
            pass

    if isinstance(value, dict):
        # Extract hash and store (canonical identifiers)
        hash_val = value.get("hash")
        store_val = value.get("store") or "PATH"
        if not store_val or store_val == "PATH":
            try:
                extra_store = value.get("extra",
                                        {}).get("store")
            except Exception:
                extra_store = None
            if extra_store:
                store_val = extra_store

        # If no hash, try to compute from path or use placeholder
        if not hash_val:
            path_val = value.get("path")
            if path_val:
                try:
                    from SYS.utils import sha256_file
                    from pathlib import Path

                    hash_val = sha256_file(Path(path_val))
                except Exception:
                    hash_val = "unknown"
            else:
                hash_val = "unknown"

        # Extract title from filename if not provided
        title_val = value.get("title")
        if not title_val:
            path_val = value.get("path")
            if path_val:
                try:
                    from pathlib import Path

                    title_val = Path(path_val).stem
                except Exception:
                    pass

        extra = {
            k: v
            for k, v in value.items() if k not in known_keys
        }

        # Extract URL: prefer direct url field, then url list
        from SYS.metadata import normalize_urls

        url_list = normalize_urls(value.get("url"))
        url_val = url_list[0] if url_list else None
        if len(url_list) > 1:
            extra["url"] = url_list

        # Extract relationships
        rels = value.get("relationships") or {}

        # Canonical tag: accept list or single string
        tag_val: list[str] = []
        if "tag" in value:
            raw_tag = value["tag"]
            if isinstance(raw_tag, list):
                tag_val = [str(t) for t in raw_tag if t is not None]
            elif isinstance(raw_tag, str):
                tag_val = [raw_tag]

        # Consolidate path: prefer explicit path key, but NOT target if it's a URL
        path_val = value.get("path")
        # Only use target as path if it's not a URL (url should stay in url field)
        if not path_val and "target" in value:
            target = value["target"]
            if target and not (isinstance(target,
                                          str) and (target.startswith("http://")
                                                    or target.startswith("https://"))):
                path_val = target

        # If the path value is actually a URL, move it to url_val and clear path_val
        try:
            if isinstance(path_val,
                          str) and (path_val.startswith("http://")
                                    or path_val.startswith("https://")):
                # Prefer existing url_val if present, otherwise move path_val into url_val
                if not url_val:
                    url_val = path_val
                path_val = None
        except Exception:
            pass

        # Extract media_kind if available
        if "media_kind" in value:
            extra["media_kind"] = value["media_kind"]

        pipe_obj = models.PipeObject(
            hash=hash_val,
            store=store_val,
            provider=str(
                value.get("provider") or value.get("prov") or extra.get("provider")
                or ""
            ).strip() or None,
            tag=tag_val,
            title=title_val,
            url=url_val,
            source_url=value.get("source_url"),
            duration=value.get("duration") or value.get("duration_seconds"),
            metadata=value.get("metadata") or value.get("full_metadata") or {},
            warnings=list(value.get("warnings") or []),
            path=path_val,
            relationships=rels,
            is_temp=bool(value.get("is_temp",
                                   False)),
            action=value.get("action"),
            parent_hash=value.get("parent_hash"),
            extra=extra,
        )

        return pipe_obj

    # Fallback: build from path argument or bare value
    hash_val = "unknown"
    path_val = default_path or getattr(value, "path", None)
    url_val: Optional[str] = None
    title_val = None

    # If the raw value is a string, treat it as either a URL or a file path.
    # This is important for @-selection results that are plain URL strings.
    if isinstance(value, str):
        s = value.strip()
        if s.lower().startswith(("http://", "https://")):
            url_val = s
            path_val = None
        else:
            path_val = s

    if path_val and path_val != "unknown":
        try:
            from SYS.utils import sha256_file
            from pathlib import Path

            path_obj = Path(path_val)
            hash_val = sha256_file(path_obj)
            # Extract title from filename (without extension)
            title_val = path_obj.stem
        except Exception:
            pass

    # When coming from a raw URL string, mark it explicitly as URL.
    # Otherwise treat it as a local path.
    store_val = "URL" if url_val else "PATH"

    pipe_obj = models.PipeObject(
        hash=hash_val,
        store=store_val,
        provider=None,
        path=str(path_val) if path_val and path_val != "unknown" else None,
        title=title_val,
        url=url_val,
        source_url=url_val,
        tag=[],
        extra={},
    )

    return pipe_obj


def register_url_with_local_library(
    pipe_obj: models.PipeObject,
    config: Dict[str,
                 Any]
) -> bool:
    """Register url with a file in the local library database.

    This is called automatically by download cmdlet to ensure url are persisted
    without requiring a separate add-url step in the pipeline.

    Args:
        pipe_obj: PipeObject with path and url
        config: Config dict containing local library path

    Returns:
        True if url were registered, False otherwise
    """

    try:
        from SYS.config import get_local_storage_path
        from API.folder import API_folder_store

        file_path = get_field(pipe_obj, "path")
        url_field = get_field(pipe_obj, "url", [])
        urls: List[str] = []
        if isinstance(url_field, str):
            urls = [u.strip() for u in url_field.split(",") if u.strip()]
        elif isinstance(url_field, (list, tuple)):
            urls = [u for u in url_field if isinstance(u, str) and u.strip()]

        if not file_path or not urls:
            return False

        path_obj = Path(file_path)
        if not path_obj.exists():
            return False

        storage_path = get_local_storage_path(config)
        if not storage_path:
            return False

        with API_folder_store(storage_path) as db:
            file_hash = db.get_file_hash(path_obj)
            if not file_hash:
                return False
            metadata = db.get_metadata(file_hash) or {}
            existing_url = metadata.get("url") or []

            # Add any new url
            changed = False
            for u in urls:
                if u not in existing_url:
                    existing_url.append(u)
                    changed = True

            if changed:
                metadata["url"] = existing_url
                db.save_metadata(path_obj, metadata)
                return True

        return True  # url already existed
    except Exception:
        return False


def resolve_tidal_manifest_path(item: Any) -> Optional[str]:
    """Persist the Tidal manifest from search results and return a local path."""

    metadata = None
    if isinstance(item, dict):
        metadata = item.get("full_metadata") or item.get("metadata")
    else:
        metadata = getattr(item, "full_metadata", None) or getattr(item, "metadata", None)

    if not isinstance(metadata, dict):
        return None

    existing_path = metadata.get("_tidal_manifest_path")
    if existing_path:
        try:
            resolved = Path(str(existing_path))
            if resolved.is_file():
                return str(resolved)
        except Exception:
            pass

    existing_url = metadata.get("_tidal_manifest_url")
    if existing_url and isinstance(existing_url, str):
        candidate = existing_url.strip()
        if candidate:
            return candidate

    raw_manifest = metadata.get("manifest")
    if not raw_manifest:
        # When piping directly from the HIFI search table, we may only have a track id.
        # Fetch track details from the proxy so downstream stages can decode the manifest.
        try:
            already = bool(metadata.get("_tidal_track_details_fetched"))
        except Exception:
            already = False

        track_id = metadata.get("trackId") or metadata.get("id")
        if track_id is None:
            try:
                if isinstance(item, dict):
                    candidate_path = item.get("path") or item.get("url")
                else:
                    candidate_path = getattr(item, "path", None) or getattr(item, "url", None)
            except Exception:
                candidate_path = None

            if candidate_path:
                m = re.search(
                    r"hifi:(?://)?track[\\/](\d+)",
                    str(candidate_path),
                    flags=re.IGNORECASE,
                )
                if m:
                    track_id = m.group(1)

        if (not already) and track_id is not None:
            try:
                track_int = int(track_id)
            except Exception:
                track_int = None

            if track_int and track_int > 0:
                try:
                    import httpx

                    resp = httpx.get(
                        "https://tidal-api.binimum.org/track/",
                        params={"id": str(track_int)},
                        timeout=10.0,
                    )
                    resp.raise_for_status()
                    payload = resp.json()
                    data = payload.get("data") if isinstance(payload, dict) else None
                    if isinstance(data, dict) and data:
                        try:
                            metadata.update(data)
                        except Exception:
                            pass
                        try:
                            metadata["_tidal_track_details_fetched"] = True
                        except Exception:
                            pass
                except Exception:
                    pass

        raw_manifest = metadata.get("manifest")
        if not raw_manifest:
            return None

    manifest_str = "".join(str(raw_manifest or "").split())
    if not manifest_str:
        return None

    manifest_bytes: bytes
    try:
        manifest_bytes = base64.b64decode(manifest_str, validate=True)
    except Exception:
        try:
            manifest_bytes = base64.b64decode(manifest_str, validate=False)
        except Exception:
            try:
                manifest_bytes = manifest_str.encode("utf-8")
            except Exception:
                return None

    if not manifest_bytes:
        return None

    head = (manifest_bytes[:1024] or b"").lstrip()
    if head.startswith((b"{", b"[")):
        try:
            text = manifest_bytes.decode("utf-8", errors="ignore")
            payload = json.loads(text)
            urls = payload.get("urls") or []
            selected_url = None
            for candidate in urls:
                if isinstance(candidate, str):
                    candidate = candidate.strip()
                    if candidate:
                        selected_url = candidate
                        break
            if selected_url:
                try:
                    metadata["_tidal_manifest_url"] = selected_url
                except Exception:
                    pass
                try:
                    log(
                        f"[hifi] Resolved JSON manifest for track {metadata.get('trackId') or metadata.get('id')} to {selected_url}",
                        file=sys.stderr,
                    )
                except Exception:
                    pass
                return selected_url
            try:
                metadata["_tidal_manifest_error"] = "JSON manifest contained no urls"
            except Exception:
                pass
            log(
                f"[hifi] JSON manifest for track {metadata.get('trackId') or metadata.get('id')} had no playable urls",
                file=sys.stderr,
            )
        except Exception as exc:
            try:
                metadata["_tidal_manifest_error"] = (
                    f"Failed to parse JSON manifest: {exc}"
                )
            except Exception:
                pass
            log(
                f"[hifi] Failed to parse JSON manifest for track {metadata.get('trackId') or metadata.get('id')}: {exc}",
                file=sys.stderr,
            )
        return None

    looks_like_mpd = (
        head.startswith(b"<?xml")
        or head.startswith(b"<MPD")
        or b"<MPD" in head
    )

    if not looks_like_mpd:
        manifest_mime = str(metadata.get("manifestMimeType") or "").strip().lower()
        try:
            metadata["_tidal_manifest_error"] = (
                f"Decoded manifest is not an MPD XML (mime: {manifest_mime or 'unknown'})"
            )
        except Exception:
            pass
        try:
            log(
                f"[hifi] Decoded manifest is not an MPD XML for track {metadata.get('trackId') or metadata.get('id')} (mime {manifest_mime or 'unknown'})",
                file=sys.stderr,
            )
        except Exception:
            pass
        return None

    manifest_hash = str(metadata.get("manifestHash") or "").strip()
    track_id = metadata.get("trackId") or metadata.get("id")
    identifier = manifest_hash or hashlib.sha256(manifest_bytes).hexdigest()
    identifier_safe = re.sub(r"[^A-Za-z0-9_-]+", "_", identifier)[:64]
    if not identifier_safe:
        identifier_safe = hashlib.sha256(manifest_bytes).hexdigest()[:12]

    track_safe = "tidal"
    if track_id is not None:
        track_safe = re.sub(r"[^A-Za-z0-9_-]+", "_", str(track_id))[:32]
        if not track_safe:
            track_safe = "tidal"

    # Persist as .mpd for DASH manifests.
    ext = "mpd"

    manifest_dir = Path(tempfile.gettempdir()) / "medeia" / "hifi"
    try:
        manifest_dir.mkdir(parents=True, exist_ok=True)
    except Exception:
        pass

    filename = f"hifi-{track_safe}-{identifier_safe[:24]}.{ext}"
    target_path = manifest_dir / filename
    try:
        with open(target_path, "wb") as fh:
            fh.write(manifest_bytes)
        metadata["_tidal_manifest_path"] = str(target_path)
        if isinstance(item, dict):
            if item.get("full_metadata") is metadata:
                item["full_metadata"] = metadata
            elif item.get("metadata") is metadata:
                item["metadata"] = metadata
        else:
            extra = getattr(item, "extra", None)
            if isinstance(extra, dict):
                extra["_tidal_manifest_path"] = str(target_path)
    except Exception:
        return None

    return str(target_path)