"""Search-store cmdlet: Search for files in storage backends (Folder, Hydrus)."""
from __future__ import annotations

from typing import Any, Dict, Sequence, List, Optional
from pathlib import Path
from collections import OrderedDict
import re
import json
import sys

from SYS.logger import log, debug

from . import _shared as sh

Cmdlet, CmdletArg, SharedArgs, get_field, should_show_help, normalize_hash, first_title_tag = (
    sh.Cmdlet,
    sh.CmdletArg,
    sh.SharedArgs,
    sh.get_field,
    sh.should_show_help,
    sh.normalize_hash,
    sh.first_title_tag,
)
import pipeline as ctx


STORAGE_ORIGINS = {"local", "hydrus", "folder"}


class Search_Store(Cmdlet):
    """Class-based search-store cmdlet for searching storage backends."""

    def __init__(self) -> None:
        super().__init__(
            name="search-store",
            summary="Search storage backends (Folder, Hydrus) for files.",
            usage="search-store [query] [-store BACKEND] [-limit N]",
            arg=[
                CmdletArg("query", description="Search query string"),
                CmdletArg("limit", type="integer", description="Limit results (default: 100)"),
                SharedArgs.STORE,
            ],
            detail=[
                "Search across storage backends: Folder stores and Hydrus instances",
                "Use -store to search a specific backend by name",
                "URL search: url:* (any URL) or url:<value> (URL substring)",
                "Results include hash for downstream commands (get-file, add-tag, etc.)",
                "Examples:",
                "search-store foo                          # Search all storage backends",
                "search-store -store home '*'              # Search 'home' Hydrus instance",
                "search-store -store test 'video'          # Search 'test' folder store",
                "search-store 'url:*'                      # Files that have any URL",
                "search-store 'url:youtube.com'            # Files whose URL contains substring",
            ],
            exec=self.run,
        )
        self.register()

    # --- Helper methods -------------------------------------------------
    @staticmethod
    def _parse_hash_query(query: str) -> List[str]:
        """Parse a `hash:` query into a list of normalized 64-hex SHA256 hashes.

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

        # Split on commas and whitespace.
        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

    @staticmethod
    def _normalize_extension(ext_value: Any) -> str:
        """Sanitize extension strings to alphanumerics and cap at 5 chars."""
        ext = str(ext_value or "").strip().lstrip(".")
        for sep in (" ", "|", "(", "[", "{", ",", ";"):
            if sep in ext:
                ext = ext.split(sep, 1)[0]
                break
        if "." in ext:
            ext = ext.split(".")[-1]
        ext = "".join(ch for ch in ext if ch.isalnum())
        return ext[:5]

    def _ensure_storage_columns(self, payload: Dict[str, Any]) -> Dict[str, Any]:
        """Ensure storage results have the necessary fields for result_table display."""
        store_value = str(payload.get("store") or "").lower()
        if store_value not in STORAGE_ORIGINS:
            return payload

        # Ensure we have title field
        if "title" not in payload:
            payload["title"] = payload.get("name") or payload.get("target") or payload.get("path") or "Result"
        
        # Ensure we have ext field
        if "ext" not in payload:
            title = str(payload.get("title", ""))
            path_obj = Path(title)
            if path_obj.suffix:
                payload["ext"] = self._normalize_extension(path_obj.suffix.lstrip('.'))
            else:
                payload["ext"] = payload.get("ext", "")
        
        # Ensure size_bytes is present for display (already set by search_file())
        # result_table will handle formatting it
        
        # Don't create manual columns - let result_table handle display
        # This allows the table to respect max_columns and apply consistent formatting
        return payload

    # --- Execution ------------------------------------------------------
    def run(self, result: Any, args: Sequence[str], config: Dict[str, Any]) -> int:
        """Search storage backends for files."""
        if should_show_help(args):
            log(f"Cmdlet: {self.name}\nSummary: {self.summary}\nUsage: {self.usage}")
            return 0

        args_list = [str(arg) for arg in (args or [])]

        # Build dynamic flag variants from cmdlet arg definitions.
        # This avoids hardcoding flag spellings in parsing loops.
        flag_registry = self.build_flag_registry()
        store_flags = {f.lower() for f in (flag_registry.get("store") or {"-store", "--store"})}
        limit_flags = {f.lower() for f in (flag_registry.get("limit") or {"-limit", "--limit"})}

        # Parse arguments
        query = ""
        storage_backend: Optional[str] = None
        limit = 100
        searched_backends: List[str] = []

        i = 0
        while i < len(args_list):
            arg = args_list[i]
            low = arg.lower()
            if low in store_flags and i + 1 < len(args_list):
                storage_backend = args_list[i + 1]
                i += 2
            elif low in limit_flags and i + 1 < len(args_list):
                try:
                    limit = int(args_list[i + 1])
                except ValueError:
                    limit = 100
                i += 2
            elif not arg.startswith("-"):
                query = f"{query} {arg}".strip() if query else arg
                i += 1
            else:
                i += 1

        store_filter: Optional[str] = None
        if query:
            match = re.search(r"\bstore:([^\s,]+)", query, flags=re.IGNORECASE)
            if match:
                store_filter = match.group(1).strip() or None
            query = re.sub(r"\s*[,]?\s*store:[^\s,]+", " ", query, flags=re.IGNORECASE)
            query = re.sub(r"\s{2,}", " ", query)
            query = query.strip().strip(',')

        if store_filter and not storage_backend:
            storage_backend = store_filter

        hash_query = self._parse_hash_query(query)

        if not query:
            log("Provide a search query", file=sys.stderr)
            return 1

        from API.folder import API_folder_store
        from config import get_local_storage_path
        import uuid
        worker_id = str(uuid.uuid4())
        library_root = get_local_storage_path(config or {})
        if not library_root:
            log("No library root configured", file=sys.stderr)
            return 1

        # Use context manager to ensure database is always closed
        with API_folder_store(library_root) as db:
            try:
                db.insert_worker(
                    worker_id,
                    "search-store",
                    title=f"Search: {query}",
                    description=f"Query: {query}",
                    pipe=ctx.get_current_command_text()
                )

                results_list = []
                import result_table
                import importlib
                importlib.reload(result_table)
                from result_table import ResultTable

                table_title = f"Search: {query}"
                if storage_backend:
                    table_title += f" [{storage_backend}]"

                table = ResultTable(table_title)
                try:
                    table.set_source_command("search-store", list(args_list))
                except Exception:
                    pass
                if hash_query:
                    try:
                        table.set_preserve_order(True)
                    except Exception:
                        pass

                from Store import Store
                storage = Store(config=config or {})
                from Store._base import Store as BaseStore

                backend_to_search = storage_backend or None
                if hash_query:
                    # Explicit hash list search: build rows from backend metadata.
                    backends_to_try: List[str] = []
                    if backend_to_search:
                        backends_to_try = [backend_to_search]
                    else:
                        backends_to_try = list(storage.list_backends())

                    found_any = False
                    for h in hash_query:
                        resolved_backend_name: Optional[str] = None
                        resolved_backend = None

                        for backend_name in backends_to_try:
                            try:
                                backend = storage[backend_name]
                            except Exception:
                                continue
                            try:
                                # If get_metadata works, consider it a hit; get_file can be optional (e.g. remote URL).
                                meta = backend.get_metadata(h)
                                if meta is None:
                                    continue
                                resolved_backend_name = backend_name
                                resolved_backend = backend
                                break
                            except Exception:
                                continue

                        if resolved_backend_name is None or resolved_backend is None:
                            continue

                        found_any = True
                        searched_backends.append(resolved_backend_name)

                        # Resolve a path/URL string if possible
                        path_str: Optional[str] = None
                        # IMPORTANT: avoid calling get_file() for remote backends.
                        # For Hydrus, get_file() returns a browser URL (and may include access keys),
                        # which should not be pulled during search/refresh.
                        try:
                            if type(resolved_backend).__name__ == "Folder":
                                maybe_path = resolved_backend.get_file(h)
                                if isinstance(maybe_path, Path):
                                    path_str = str(maybe_path)
                                elif isinstance(maybe_path, str) and maybe_path:
                                    path_str = maybe_path
                        except Exception:
                            path_str = None

                        meta_obj: Dict[str, Any] = {}
                        try:
                            meta_obj = resolved_backend.get_metadata(h) or {}
                        except Exception:
                            meta_obj = {}

                        tags_list: List[str] = []
                        try:
                            tag_result = resolved_backend.get_tag(h)
                            if isinstance(tag_result, tuple) and tag_result:
                                maybe_tags = tag_result[0]
                            else:
                                maybe_tags = tag_result
                            if isinstance(maybe_tags, list):
                                tags_list = [str(t).strip() for t in maybe_tags if isinstance(t, str) and str(t).strip()]
                        except Exception:
                            tags_list = []

                        title_from_tag: Optional[str] = None
                        try:
                            title_tag = first_title_tag(tags_list)
                            if title_tag and ":" in title_tag:
                                title_from_tag = title_tag.split(":", 1)[1].strip()
                        except Exception:
                            title_from_tag = None

                        title = title_from_tag or meta_obj.get("title") or meta_obj.get("name")
                        if not title and path_str:
                            try:
                                title = Path(path_str).stem
                            except Exception:
                                title = path_str

                        ext_val = meta_obj.get("ext") or meta_obj.get("extension")
                        if not ext_val and path_str:
                            try:
                                ext_val = Path(path_str).suffix
                            except Exception:
                                ext_val = None
                        if not ext_val and title:
                            try:
                                ext_val = Path(str(title)).suffix
                            except Exception:
                                ext_val = None

                        size_bytes = meta_obj.get("size")
                        if size_bytes is None:
                            size_bytes = meta_obj.get("size_bytes")
                        try:
                            size_bytes_int: Optional[int] = int(size_bytes) if size_bytes is not None else None
                        except Exception:
                            size_bytes_int = None

                        payload: Dict[str, Any] = {
                            "title": str(title or h),
                            "hash": h,
                            "store": resolved_backend_name,
                            "path": path_str,
                            "ext": self._normalize_extension(ext_val),
                            "size_bytes": size_bytes_int,
                            "tag": tags_list,
                        }

                        table.add_result(payload)
                        results_list.append(payload)
                        ctx.emit(payload)

                    if found_any:
                        # Title should reflect the command, query, and only stores present in the table.
                        store_counts: "OrderedDict[str, int]" = OrderedDict()
                        for row_item in results_list:
                            store_val = str(row_item.get("store") or "").strip()
                            if not store_val:
                                continue
                            if store_val not in store_counts:
                                store_counts[store_val] = 0
                            store_counts[store_val] += 1

                        counts_part = " ".join(f"{name}:{count}" for name, count in store_counts.items() if count > 0)
                        base_title = f"search-store: {query}".strip()
                        table.title = f"{base_title} | {counts_part}" if counts_part else base_title

                        ctx.set_last_result_table(table, results_list)
                        db.append_worker_stdout(worker_id, json.dumps(results_list, indent=2))
                        db.update_worker_status(worker_id, 'completed')
                        return 0

                    log("No results found", file=sys.stderr)
                    db.append_worker_stdout(worker_id, json.dumps([], indent=2))
                    db.update_worker_status(worker_id, 'completed')
                    return 0

                if backend_to_search:
                    searched_backends.append(backend_to_search)
                    target_backend = storage[backend_to_search]
                    if type(target_backend).search is BaseStore.search:
                        log(f"Backend '{backend_to_search}' does not support searching", file=sys.stderr)
                        db.update_worker_status(worker_id, 'error')
                        return 1
                    debug(f"[search-store] Searching '{backend_to_search}'")
                    results = target_backend.search(query, limit=limit)
                    debug(f"[search-store] '{backend_to_search}' -> {len(results or [])} result(s)")
                else:
                    from API.HydrusNetwork import is_hydrus_available
                    hydrus_available = is_hydrus_available(config or {})
                    from Store.HydrusNetwork import HydrusNetwork

                    all_results = []
                    for backend_name in storage.list_searchable_backends():
                        try:
                            backend = storage[backend_name]
                            if isinstance(backend, HydrusNetwork) and not hydrus_available:
                                continue
                            searched_backends.append(backend_name)

                            debug(f"[search-store] Searching '{backend_name}'")
                            backend_results = backend.search(query, limit=limit - len(all_results))
                            debug(f"[search-store] '{backend_name}' -> {len(backend_results or [])} result(s)")
                            if backend_results:
                                all_results.extend(backend_results)
                            if len(all_results) >= limit:
                                break
                        except Exception as exc:
                            log(f"Backend {backend_name} search failed: {exc}", file=sys.stderr)
                    results = all_results[:limit]

                if results:
                    for item in results:
                        def _as_dict(obj: Any) -> Dict[str, Any]:
                            if isinstance(obj, dict):
                                return dict(obj)
                            if hasattr(obj, "to_dict") and callable(getattr(obj, "to_dict")):
                                return obj.to_dict()  # type: ignore[arg-type]
                            return {"title": str(obj)}

                        item_dict = _as_dict(item)
                        if store_filter:
                            store_val = str(item_dict.get("store") or "").lower()
                            if store_filter != store_val:
                                continue
                        normalized = self._ensure_storage_columns(item_dict)

                        # Make hash/store available for downstream cmdlet without rerunning search
                        hash_val = normalized.get("hash")
                        store_val = normalized.get("store") or item_dict.get("store")
                        if hash_val and not normalized.get("hash"):
                            normalized["hash"] = hash_val
                        if store_val and not normalized.get("store"):
                            normalized["store"] = store_val

                        table.add_result(normalized)

                        results_list.append(normalized)
                        ctx.emit(normalized)

                    # Title should reflect the command, query, and only stores present in the table.
                    store_counts: "OrderedDict[str, int]" = OrderedDict()
                    for row_item in results_list:
                        store_val = str(row_item.get("store") or "").strip()
                        if not store_val:
                            continue
                        if store_val not in store_counts:
                            store_counts[store_val] = 0
                        store_counts[store_val] += 1

                    counts_part = " ".join(f"{name}:{count}" for name, count in store_counts.items() if count > 0)
                    base_title = f"search-store: {query}".strip()
                    table.title = f"{base_title} | {counts_part}" if counts_part else base_title

                    ctx.set_last_result_table(table, results_list)
                    db.append_worker_stdout(worker_id, json.dumps(results_list, indent=2))
                else:
                    log("No results found", file=sys.stderr)
                    db.append_worker_stdout(worker_id, json.dumps([], indent=2))

                db.update_worker_status(worker_id, 'completed')
                return 0

            except Exception as exc:
                log(f"Search failed: {exc}", file=sys.stderr)
                import traceback
                traceback.print_exc(file=sys.stderr)
                try:
                    db.update_worker_status(worker_id, 'error')
                except Exception:
                    pass
                return 1


CMDLET = Search_Store()