from __future__ import annotations

import hashlib
import json
import sys
import time
from pathlib import Path
from typing import Any, Dict, Iterable, List, Optional, Callable, Tuple
from urllib.parse import urlparse

from API.HTTP import HTTPClient, _download_direct_file
from API.alldebrid import AllDebridClient, parse_magnet_or_hash, is_torrent_file
from ProviderCore.base import Provider, SearchResult
from ProviderCore.download import sanitize_filename
from SYS.logger import log, debug
from SYS.models import DownloadError

_HOSTS_CACHE_TTL_SECONDS = 24 * 60 * 60


def _repo_root() -> Path:
    try:
        return Path(__file__).resolve().parents[1]
    except Exception:
        return Path(".")


def _hosts_cache_path() -> Path:
    # Keep this local to the repo so it works in portable installs.
    # The registry's URL routing can read this file without instantiating providers.
    #
    # This file is expected to be the JSON payload shape from AllDebrid:
    #   {"status":"success","data":{"hosts":[...],"streams":[...],"redirectors":[...]}}
    return _repo_root() / "API" / "data" / "alldebrid.json"


def _load_cached_domains(category: str) -> List[str]:
    """Load cached domain list from API/data/alldebrid.json.

    category: "hosts" | "streams" | "redirectors"
    """

    wanted = str(category or "").strip().lower()
    if wanted not in {"hosts", "streams", "redirectors"}:
        return []

    path = _hosts_cache_path()
    try:
        if not path.exists() or not path.is_file():
            return []
        payload = json.loads(path.read_text(encoding="utf-8"))
    except Exception:
        return []

    if not isinstance(payload, dict):
        return []

    data = payload.get("data")
    if not isinstance(data, dict):
        # Back-compat for older cache shapes.
        data = payload
        if not isinstance(data, dict):
            return []

    raw_list = data.get(wanted)
    if not isinstance(raw_list, list):
        return []

    out: List[str] = []
    seen: set[str] = set()
    for d in raw_list:
        try:
            dom = str(d or "").strip().lower()
        except Exception:
            continue
        if not dom:
            continue
        if dom.startswith("http://") or dom.startswith("https://"):
            # Accidentally stored as a URL; normalize to hostname.
            try:
                p = urlparse(dom)
                dom = str(p.hostname or "").strip().lower()
            except Exception:
                continue
        if dom.startswith("www."):
            dom = dom[4:]
        if not dom or dom in seen:
            continue
        seen.add(dom)
        out.append(dom)
    return out


def _load_cached_hoster_domains() -> List[str]:
    # For URL routing (download-file), we intentionally use only the "hosts" list.
    # The "streams" list is extremely broad and would steal URLs from other providers.
    return _load_cached_domains("hosts")


def _save_cached_hosts_payload(payload: Dict[str, Any]) -> None:
    path = _hosts_cache_path()
    try:
        path.parent.mkdir(parents=True, exist_ok=True)
    except Exception:
        return
    try:
        path.write_text(json.dumps(payload, ensure_ascii=False, indent=2), encoding="utf-8")
    except Exception:
        return


def _cache_is_fresh() -> bool:
    path = _hosts_cache_path()
    try:
        if not path.exists() or not path.is_file():
            return False
        mtime = float(path.stat().st_mtime)
        return (time.time() - mtime) < _HOSTS_CACHE_TTL_SECONDS
    except Exception:
        return False


def _fetch_hosts_payload_v4_hosts() -> Optional[Dict[str, Any]]:
    """Fetch the public AllDebrid hosts payload.

    This intentionally does NOT require an API key.
    Endpoint referenced by user: https://api.alldebrid.com/v4/hosts
    """

    url = "https://api.alldebrid.com/v4/hosts"
    try:
        with HTTPClient(timeout=20.0) as client:
            resp = client.get(url)
            resp.raise_for_status()
            data = resp.json()
            return data if isinstance(data, dict) else None
    except Exception as exc:
        log(f"[alldebrid] Failed to fetch hosts list: {exc}", file=sys.stderr)
        return None


def refresh_alldebrid_hoster_cache(*, force: bool = False) -> None:
    """Refresh the on-disk cache of host domains (best-effort)."""
    if (not force) and _cache_is_fresh():
        return

    payload = _fetch_hosts_payload_v4_hosts()
    if isinstance(payload, dict) and payload:
        _save_cached_hosts_payload(payload)


def _get_debrid_api_key(config: Dict[str, Any]) -> Optional[str]:
    """Read AllDebrid API key from config.

        Preferred formats:
            - config.conf provider block:
                    [provider=alldebrid]
                    api_key=...
                -> config["provider"]["alldebrid"]["api_key"]

            - store-style debrid block:
                config["store"]["debrid"]["all-debrid"]["api_key"]

    Falls back to some legacy keys if present.
    """
    # 1) provider block: [provider=alldebrid]
    provider = config.get("provider")
    if isinstance(provider, dict):
        entry = provider.get("alldebrid")
        if isinstance(entry, dict):
            for k in ("api_key", "apikey", "API_KEY", "APIKEY"):
                val = entry.get(k)
                if isinstance(val, str) and val.strip():
                    return val.strip()
        if isinstance(entry, str) and entry.strip():
            return entry.strip()

    # 2) store.debrid block (canonical for debrid store configuration)
    try:
        from SYS.config import get_debrid_api_key

        key = get_debrid_api_key(config, service="All-debrid")
        return key.strip() if key else None
    except Exception:
        pass

    # Legacy fallback (kept permissive so older configs still work)
    for legacy_key in ("alldebrid_api_key", "AllDebrid", "all_debrid_api_key"):
        val = config.get(legacy_key)
        if isinstance(val, str) and val.strip():
            return val.strip()

    return None


def _consume_bencoded_value(data: bytes, pos: int) -> int:
    if pos >= len(data):
        raise ValueError("Unexpected end of bencode")
    token = data[pos:pos + 1]
    if token == b"i":
        end = data.find(b"e", pos + 1)
        if end == -1:
            raise ValueError("Unterminated integer")
        return end + 1
    if token == b"l" or token == b"d":
        cursor = pos + 1
        while cursor < len(data):
            if data[cursor:cursor + 1] == b"e":
                return cursor + 1
            cursor = _consume_bencoded_value(data, cursor)
        raise ValueError("Unterminated list/dict")
    if token and b"0" <= token <= b"9":
        colon = data.find(b":", pos)
        if colon == -1:
            raise ValueError("Invalid string length")
        length = int(data[pos:colon])
        return colon + 1 + length
    raise ValueError("Unknown bencode token")


def _info_hash_from_torrent_bytes(data: bytes) -> Optional[str]:
    needle = b"4:info"
    idx = data.find(needle)
    if idx == -1:
        return None

    start = idx + len(needle)
    try:
        end = _consume_bencoded_value(data, start)
    except ValueError:
        return None

    info_bytes = data[start:end]
    try:
        return hashlib.sha1(info_bytes).hexdigest()
    except Exception:
        return None


def _fetch_torrent_bytes(target: str) -> Optional[bytes]:
    path_obj = Path(str(target))
    try:
        if path_obj.exists() and path_obj.is_file():
            return path_obj.read_bytes()
    except Exception:
        pass

    try:
        parsed = urlparse(target)
    except Exception:
        parsed = None

    if parsed is None or not parsed.scheme or parsed.scheme.lower() not in {"http", "https"}:
        return None

    if not target.lower().endswith(".torrent"):
        return None

    try:
        with HTTPClient(timeout=30.0) as client:
            response = client.get(target)
            return response.content
    except Exception as exc:
        log(f"Failed to download .torrent from {target}: {exc}", file=sys.stderr)
        return None


def resolve_magnet_spec(target: str) -> Optional[str]:
    """Resolve a magnet/hash/torrent URL into a magnet/hash string."""
    candidate = str(target or "").strip()
    if not candidate:
        return None

    parsed = parse_magnet_or_hash(candidate)
    if parsed:
        return parsed

    if is_torrent_file(candidate):
        torrent_bytes = _fetch_torrent_bytes(candidate)
        if not torrent_bytes:
            return None
        hash_value = _info_hash_from_torrent_bytes(torrent_bytes)
        if hash_value:
            return hash_value
    return None


def _dispatch_alldebrid_magnet_search(
    magnet_id: int,
    config: Dict[str, Any],
) -> None:
    try:
        from cmdlet.search_file import CMDLET as _SEARCH_FILE_CMDLET

        exec_fn = getattr(_SEARCH_FILE_CMDLET, "exec", None)
        if callable(exec_fn):
            exec_fn(
                None,
                ["-provider", "alldebrid", f"ID={magnet_id}"],
                config,
            )
    except Exception:
        pass
    debug(f"[alldebrid] Sent magnet {magnet_id} to AllDebrid for download")


def prepare_magnet(
    magnet_spec: str,
    config: Dict[str, Any],
) -> tuple[Optional[AllDebridClient], Optional[int]]:
    api_key = _get_debrid_api_key(config or {})
    if not api_key:
        try:
            from SYS.rich_display import show_provider_config_panel

            show_provider_config_panel("alldebrid", ["api_key"])
        except Exception:
            pass
        log("AllDebrid API key not configured (provider.alldebrid.api_key)", file=sys.stderr)
        return None, None

    try:
        client = AllDebridClient(api_key)
    except Exception as exc:
        log(f"Failed to initialize AllDebrid client: {exc}", file=sys.stderr)
        return None, None

    try:
        magnet_info = client.magnet_add(magnet_spec)
        magnet_id_val = magnet_info.get("id") or 0
        magnet_id = int(magnet_id_val)
        if magnet_id <= 0:
            log(f"AllDebrid magnet submission failed: {magnet_info}", file=sys.stderr)
            return None, None
    except Exception as exc:
        log(f"Failed to submit magnet to AllDebrid: {exc}", file=sys.stderr)
        return None, None

    _dispatch_alldebrid_magnet_search(magnet_id, config)
    return client, magnet_id


def _flatten_files_with_relpath(items: Any) -> Iterable[Dict[str, Any]]:
    for node in AllDebrid._flatten_files(items):
        enriched = dict(node)
        rel = node.get("_relpath") or node.get("relpath")
        if not rel:
            name = node.get("n") or node.get("name")
            rel = str(name or "").strip()
        enriched["relpath"] = rel
        yield enriched


def download_magnet(
    magnet_spec: str,
    original_url: str,
    final_output_dir: Path,
    config: Dict[str, Any],
    progress: Any,
    quiet_mode: bool,
    path_from_result: Callable[[Any], Path],
    on_emit: Callable[[Path, str, str, Dict[str, Any]], None],
) -> tuple[int, Optional[int]]:
    client, magnet_id = prepare_magnet(magnet_spec, config)
    if client is None or magnet_id is None:
        return 0, None

    wait_timeout = 300
    try:
        streaming_config = config.get("streaming", {}) if isinstance(config, dict) else {}
        wait_timeout = int(streaming_config.get("wait_timeout", 300))
    except Exception:
        wait_timeout = 300

    elapsed = 0
    while elapsed < wait_timeout:
        try:
            status = client.magnet_status(magnet_id)
        except Exception as exc:
            log(f"Failed to read magnet status {magnet_id}: {exc}", file=sys.stderr)
            return 0, magnet_id
        ready = bool(status.get("ready")) or status.get("statusCode") == 4
        if ready:
            break
        time.sleep(5)
        elapsed += 5
    else:
        log(f"AllDebrid magnet {magnet_id} timed out after {wait_timeout}s", file=sys.stderr)
        return 0, magnet_id

    try:
        files_result = client.magnet_links([magnet_id])
    except Exception as exc:
        log(f"Failed to list AllDebrid magnet files: {exc}", file=sys.stderr)
        return 0, magnet_id

    magnet_files = files_result.get(str(magnet_id), {}) if isinstance(files_result, dict) else {}
    file_nodes = magnet_files.get("files") if isinstance(magnet_files, dict) else []
    if not file_nodes:
        log(f"AllDebrid magnet {magnet_id} produced no files", file=sys.stderr)
        return 0, magnet_id

    downloaded = 0
    for node in _flatten_files_with_relpath(file_nodes):
        file_url = str(node.get("link") or "").strip()
        file_name = str(node.get("name") or "").strip()
        relpath = str(node.get("relpath") or file_name).strip()
        if not file_url or not relpath:
            continue

        target_path = final_output_dir
        rel_path_obj = Path(relpath)
        output_dir = target_path
        if rel_path_obj.parent:
            output_dir = target_path / rel_path_obj.parent
        try:
            output_dir.mkdir(parents=True, exist_ok=True)
        except Exception:
            output_dir = target_path

        try:
            result_obj = _download_direct_file(
                file_url,
                output_dir,
                quiet=quiet_mode,
                suggested_filename=rel_path_obj.name,
                pipeline_progress=progress,
            )
        except Exception as exc:
            log(f"Failed to download AllDebrid file {file_url}: {exc}", file=sys.stderr)
            continue

        downloaded_path = path_from_result(result_obj)
        metadata = {
            "magnet_id": magnet_id,
            "relpath": relpath,
            "name": file_name,
        }
        on_emit(downloaded_path, file_url or original_url, relpath, metadata)
        downloaded += 1

    return downloaded, magnet_id


def expand_folder_item(
    item: Any,
    get_search_provider: Optional[Callable[[str, Dict[str, Any]], Any]],
    config: Dict[str, Any],
) -> Tuple[List[Any], Optional[str]]:
    table = getattr(item, "table", None) if not isinstance(item, dict) else item.get("table")
    media_kind = getattr(item, "media_kind", None) if not isinstance(item, dict) else item.get("media_kind")
    full_metadata = getattr(item, "full_metadata", None) if not isinstance(item, dict) else item.get("full_metadata")
    target = None
    if isinstance(item, dict):
        target = item.get("path") or item.get("url")
    else:
        target = getattr(item, "path", None) or getattr(item, "url", None)

    if (str(table or "").lower() != "alldebrid") or (str(media_kind or "").lower() != "folder"):
        return [], None

    magnet_id = None
    if isinstance(full_metadata, dict):
        magnet_id = full_metadata.get("magnet_id")
    if magnet_id is None and isinstance(target, str) and target.lower().startswith("alldebrid:magnet:"):
        try:
            magnet_id = int(target.split(":")[-1])
        except Exception:
            magnet_id = None

    if magnet_id is None or get_search_provider is None:
        return [], None

    provider = get_search_provider("alldebrid", config) if get_search_provider else None
    if provider is None:
        return [], None

    try:
        files = provider.search("*", limit=10_000, filters={"view": "files", "magnet_id": int(magnet_id)})
    except Exception:
        files = []

    if files and len(files) == 1 and getattr(files[0], "media_kind", "") == "folder":
        detail = getattr(files[0], "detail", "")
        return [], str(detail or "unknown")

    expanded: List[Any] = []
    for sr in files:
        expanded.append(sr.to_dict() if hasattr(sr, "to_dict") else sr)
    return expanded, None


def adjust_output_dir_for_alldebrid(
    base_output_dir: Path,
    full_metadata: Optional[Dict[str, Any]],
    item: Any,
) -> Path:
    from ProviderCore.download import sanitize_filename as _sf

    output_dir = base_output_dir
    md = full_metadata if isinstance(full_metadata, dict) else {}
    magnet_name = md.get("magnet_name") or md.get("folder")
    if not magnet_name:
        try:
            detail_val = getattr(item, "detail", None) if not isinstance(item, dict) else item.get("detail")
            magnet_name = str(detail_val or "").strip() or None
        except Exception:
            magnet_name = None

    magnet_dir_name = _sf(str(magnet_name)) if magnet_name else ""
    try:
        base_tail = str(Path(output_dir).name or "")
    except Exception:
        base_tail = ""
    base_tail_norm = _sf(base_tail).lower() if base_tail.strip() else ""
    magnet_dir_norm = magnet_dir_name.lower() if magnet_dir_name else ""

    if magnet_dir_name and (not base_tail_norm or base_tail_norm != magnet_dir_norm):
        output_dir = Path(output_dir) / magnet_dir_name

    relpath = md.get("relpath") if isinstance(md, dict) else None
    if (not relpath) and isinstance(md.get("file"), dict):
        relpath = md["file"].get("_relpath")

    if relpath:
        parts = [p for p in str(relpath).replace("\\", "/").split("/") if p and p not in {".", ".."}]
        if magnet_dir_name and parts:
            try:
                if _sf(parts[0]).lower() == magnet_dir_norm:
                    parts = parts[1:]
            except Exception:
                pass
        for part in parts[:-1]:
            output_dir = Path(output_dir) / _sf(part)

    try:
        Path(output_dir).mkdir(parents=True, exist_ok=True)
    except Exception:
        output_dir = base_output_dir

    return output_dir


class AllDebrid(Provider):
    # Magnet URIs should be routed through this provider.
    URL = ("magnet:",)
    URL_DOMAINS = ()

    @classmethod
    def url_patterns(cls) -> Tuple[str, ...]:
        # Combine static patterns with cached host domains.
        patterns = list(super().url_patterns())
        try:
            cached = _load_cached_hoster_domains()
            for d in cached:
                dom = str(d or "").strip().lower()
                if dom and dom not in patterns:
                    patterns.append(dom)
            log(
                f"[alldebrid] url_patterns loaded {len(cached)} cached host domains; total patterns={len(patterns)}",
                file=sys.stderr,
            )
        except Exception:
            pass
        return tuple(patterns)

    """Search provider for AllDebrid account content.

    This provider lists and searches the files/magnets already present in the
    user's AllDebrid account.

    Query behavior:
    - "*" / "all" / "list": list recent files from ready magnets
    - otherwise: substring match on file name OR magnet name, or exact magnet id
    """

    def validate(self) -> bool:
        # Consider "available" when configured; actual API connectivity can vary.
        ok = bool(_get_debrid_api_key(self.config or {}))
        if ok:
            # Best-effort: refresh cached host domains so future URL routing can
            # route supported hosters through this provider.
            try:
                refresh_alldebrid_hoster_cache(force=False)
            except Exception:
                pass
        return ok

    def download(self, result: SearchResult, output_dir: Path) -> Optional[Path]:
        """Download an AllDebrid SearchResult into output_dir.

        AllDebrid magnet file listings often provide links that require an API
        "unlock" step to produce a true direct-download URL. Without unlocking,
        callers may download a small HTML/redirect page instead of file bytes.

        This is used by the download-file cmdlet when a provider item is piped.
        """
        try:
            api_key = _get_debrid_api_key(self.config or {})
            if not api_key:
                log("[alldebrid] download skipped: missing api_key", file=sys.stderr)
                return None

            target = str(getattr(result, "path", "") or "").strip()
            if not target.startswith(("http://", "https://")):
                log(f"[alldebrid] download skipped: target not http(s): {target}", file=sys.stderr)
                return None

            try:
                from API.alldebrid import AllDebridClient

                client = AllDebridClient(api_key)
            except Exception as exc:
                log(f"[alldebrid] Failed to init client: {exc}", file=sys.stderr)
                return None

            log(f"[alldebrid] download routing target={target}", file=sys.stderr)

            # Prefer provider title as the output filename; later we may override if unlocked URL has a better basename.
            suggested = sanitize_filename(str(getattr(result, "title", "") or "").strip())
            suggested_name = suggested if suggested else None

            # Quiet mode when download-file is mid-pipeline.
            quiet = bool(self.config.get("_quiet_background_output")) if isinstance(self.config, dict) else False

            def _html_guard(path: Path) -> bool:
                try:
                    if path.exists():
                        size = path.stat().st_size
                        if size > 0 and size <= 250_000 and path.suffix.lower() not in (".html", ".htm"):
                            head = path.read_bytes()[:512]
                            try:
                                text = head.decode("utf-8", errors="ignore").lower()
                            except Exception:
                                text = ""
                            if "<html" in text or "<!doctype html" in text:
                                return True
                except Exception:
                    return False
                return False

            def _download_unlocked(unlocked_url: str, *, allow_html: bool = False) -> Optional[Path]:
                # If this is an unlocked debrid link (allow_html=True), stream it directly and skip
                # the generic HTML guard to avoid falling back to the public hoster.
                if allow_html:
                    try:
                        from API.HTTP import HTTPClient

                        fname = suggested_name or sanitize_filename(Path(urlparse(unlocked_url).path).name)
                        if not fname:
                            fname = "download"
                        if not Path(fname).suffix:
                            fname = f"{fname}.bin"
                        dest = Path(output_dir) / fname
                        dest.parent.mkdir(parents=True, exist_ok=True)
                        with HTTPClient(timeout=30.0) as client:
                            with client._request_stream("GET", unlocked_url, follow_redirects=True) as resp:
                                resp.raise_for_status()
                                with dest.open("wb") as fh:
                                    for chunk in resp.iter_bytes():
                                        if not chunk:
                                            continue
                                        fh.write(chunk)
                        return dest if dest.exists() else None
                    except Exception as exc2:
                        log(f"[alldebrid] raw stream (unlocked) failed: {exc2}", file=sys.stderr)
                        return None

                # Otherwise, use standard downloader with guardrails.
                pipe_progress = None
                try:
                    if isinstance(self.config, dict):
                        pipe_progress = self.config.get("_pipeline_progress")
                except Exception:
                    pipe_progress = None

                try:
                    dl_res = _download_direct_file(
                        unlocked_url,
                        Path(output_dir),
                        quiet=quiet,
                        suggested_filename=suggested_name,
                        pipeline_progress=pipe_progress,
                    )
                    downloaded_path = getattr(dl_res, "path", None)
                    if downloaded_path is None:
                        return None
                    downloaded_path = Path(str(downloaded_path))
                except DownloadError as exc:
                    log(
                        f"[alldebrid] _download_direct_file rejected URL ({exc}); no further fallback", file=sys.stderr
                    )
                    return None

                try:
                    if _html_guard(downloaded_path):
                        log(
                            "[alldebrid] Download returned HTML page (not file bytes). Try again or check AllDebrid link status.",
                            file=sys.stderr,
                        )
                        return None
                except Exception:
                    pass

                return downloaded_path if downloaded_path.exists() else None

            unlocked_url = target
            try:
                unlocked = client.resolve_unlock_link(target, poll=True, max_wait_seconds=45, poll_interval_seconds=5)
                if isinstance(unlocked, str) and unlocked.strip().startswith(("http://", "https://")):
                    unlocked_url = unlocked.strip()
                log(f"[alldebrid] unlock -> {unlocked_url}", file=sys.stderr)
            except Exception as exc:
                log(f"[alldebrid] Failed to unlock link: {exc}", file=sys.stderr)

            if unlocked_url != target:
                # Prefer filename from unlocked URL path.
                try:
                    unlocked_name = sanitize_filename(Path(urlparse(unlocked_url).path).name)
                    if unlocked_name:
                        suggested_name = unlocked_name
                except Exception:
                    pass

            # When using an unlocked URL different from the original hoster, stream it directly and do NOT fall back to the public URL.
            allow_html = unlocked_url != target
            log(
                f"[alldebrid] downloading from {unlocked_url} (allow_html={allow_html})",
                file=sys.stderr,
            )
            downloaded = _download_unlocked(unlocked_url, allow_html=allow_html)
            if downloaded:
                log(f"[alldebrid] downloaded -> {downloaded}", file=sys.stderr)
                return downloaded

            # If unlock failed entirely and we never changed URL, allow a single attempt on the original target.
            if unlocked_url == target:
                downloaded = _download_unlocked(target, allow_html=False)
                if downloaded:
                    log(f"[alldebrid] downloaded (original target) -> {downloaded}", file=sys.stderr)
                    return downloaded

            return None
        except Exception:
            return None

    @staticmethod
    def _flatten_files(items: Any,
                       *,
                       _prefix: Optional[List[str]] = None) -> Iterable[Dict[str,
                                                                             Any]]:
        """Flatten AllDebrid magnet file tree into file dicts, preserving relative paths.

        API commonly returns:
          - file: {n: name, s: size, l: link}
          - folder: {n: name, e: [sub_items]}

        This flattener attaches a best-effort relative path to each yielded file node
        as `_relpath` using POSIX separators (e.g., "Season 1/E01.mkv").

        Some call sites in this repo also expect {name, size, link}, so we accept both.
        """
        prefix = list(_prefix or [])

        if not items:
            return
        if isinstance(items, dict):
            items = [items]
        if not isinstance(items, list):
            return

        for node in items:
            if not isinstance(node, dict):
                continue

            children = node.get("e") or node.get("children")
            if isinstance(children, list):
                folder_name = node.get("n") or node.get("name")
                next_prefix = prefix
                if isinstance(folder_name, str) and folder_name.strip():
                    next_prefix = prefix + [folder_name.strip()]
                yield from AllDebrid._flatten_files(children, _prefix=next_prefix)
                continue

            name = node.get("n") or node.get("name")
            link = node.get("l") or node.get("link")
            if isinstance(name,
                          str) and name.strip() and isinstance(link,
                                                               str) and link.strip():
                rel_parts = prefix + [name.strip()]
                relpath = "/".join([p for p in rel_parts if p])
                enriched = dict(node)
                enriched["_relpath"] = relpath
                yield enriched

    def search(
        self,
        query: str,
        limit: int = 50,
        filters: Optional[Dict[str,
                               Any]] = None,
        **kwargs: Any,
    ) -> List[SearchResult]:
        q = (query or "").strip()
        if not q:
            return []

        api_key = _get_debrid_api_key(self.config or {})
        if not api_key:
            return []

        view = None
        if isinstance(filters, dict):
            view = str(filters.get("view") or "").strip().lower() or None
        view = view or "folders"

        try:
            from API.alldebrid import AllDebridClient

            client = AllDebridClient(api_key)
        except Exception as exc:
            log(f"[alldebrid] Failed to init client: {exc}", file=sys.stderr)
            return []

        q_lower = q.lower()
        needle = "" if q_lower in {"*",
                                   "all",
                                   "list"} else q_lower

        # Second-stage: list files for a specific magnet id.
        if view == "files":
            magnet_id_val = None
            if isinstance(filters, dict):
                magnet_id_val = filters.get("magnet_id")
            if magnet_id_val is None:
                magnet_id_val = kwargs.get("magnet_id")

            if magnet_id_val is None:
                return []

            try:
                magnet_id = int(magnet_id_val)
            except (TypeError, ValueError):
                return []

            magnet_status: Dict[str,
                                Any] = {}
            try:
                magnet_status = client.magnet_status(magnet_id)
            except Exception:
                magnet_status = {}

            magnet_name = str(
                magnet_status.get("filename") or magnet_status.get("name")
                or magnet_status.get("hash") or f"magnet-{magnet_id}"
            )
            status_code = magnet_status.get("statusCode")
            status_text = str(magnet_status.get("status") or "").strip() or "unknown"
            ready = status_code == 4 or bool(magnet_status.get("ready"))

            if not ready:
                return [
                    SearchResult(
                        table="alldebrid",
                        title=magnet_name,
                        path=f"alldebrid:magnet:{magnet_id}",
                        detail=status_text,
                        annotations=["folder",
                                     "not-ready"],
                        media_kind="folder",
                        tag={"alldebrid",
                             "folder",
                             str(magnet_id),
                             "not-ready"},
                        columns=[
                            ("Folder",
                             magnet_name),
                            ("ID",
                             str(magnet_id)),
                            ("Status",
                             status_text),
                            ("Ready",
                             "no"),
                        ],
                        full_metadata={
                            "magnet": magnet_status,
                            "magnet_id": magnet_id,
                            "provider": "alldebrid",
                            "provider_view": "files",
                            "magnet_name": magnet_name,
                        },
                    )
                ]

            try:
                files_result = client.magnet_links([magnet_id])
                magnet_files = (
                    files_result.get(str(magnet_id),
                                     {}) if isinstance(files_result,
                                                       dict) else {}
                )
                file_tree = magnet_files.get("files",
                                             []) if isinstance(magnet_files,
                                                               dict) else []
            except Exception as exc:
                log(
                    f"[alldebrid] Failed to list files for magnet {magnet_id}: {exc}",
                    file=sys.stderr,
                )
                file_tree = []

            results: List[SearchResult] = []
            for file_node in self._flatten_files(file_tree):
                file_name = str(file_node.get("n") or file_node.get("name")
                                or "").strip()
                file_url = str(file_node.get("l") or file_node.get("link")
                               or "").strip()
                relpath = str(file_node.get("_relpath") or file_name or "").strip()
                file_size = file_node.get("s") or file_node.get("size")
                if not file_name or not file_url:
                    continue

                if needle and needle not in file_name.lower():
                    continue

                size_bytes: Optional[int] = None
                try:
                    if isinstance(file_size, (int, float)):
                        size_bytes = int(file_size)
                    elif isinstance(file_size, str) and file_size.isdigit():
                        size_bytes = int(file_size)
                except Exception:
                    size_bytes = None

                results.append(
                    SearchResult(
                        table="alldebrid",
                        title=file_name,
                        path=file_url,
                        detail=magnet_name,
                        annotations=["file"],
                        media_kind="file",
                        size_bytes=size_bytes,
                        tag={"alldebrid",
                             "file",
                             str(magnet_id)},
                        columns=[
                            ("File",
                             file_name),
                            ("Folder",
                             magnet_name),
                            ("ID",
                             str(magnet_id)),
                        ],
                        full_metadata={
                            "magnet": magnet_status,
                            "magnet_id": magnet_id,
                            "magnet_name": magnet_name,
                            "relpath": relpath,
                            "file": file_node,
                            "provider": "alldebrid",
                            "provider_view": "files",
                        },
                    )
                )
                if len(results) >= max(1, limit):
                    break

            return results

        # Default: folders view (magnets)
        try:
            magnets = client.magnet_list() or []
        except Exception as exc:
            log(f"[alldebrid] Failed to list account magnets: {exc}", file=sys.stderr)
            return []

        wanted_id: Optional[int] = None
        if needle.isdigit():
            try:
                wanted_id = int(needle)
            except Exception:
                wanted_id = None

        results: List[SearchResult] = []
        for magnet in magnets:
            if not isinstance(magnet, dict):
                continue

            magnet_id_val = magnet.get("id")
            if magnet_id_val is None:
                continue
            try:
                magnet_id = int(magnet_id_val)
            except (TypeError, ValueError):
                continue

            magnet_name = str(
                magnet.get("filename") or magnet.get("name") or magnet.get("hash")
                or f"magnet-{magnet_id}"
            )
            magnet_name_lower = magnet_name.lower()

            status_text = str(magnet.get("status") or "").strip() or "unknown"
            status_code = magnet.get("statusCode")
            ready = status_code == 4 or bool(magnet.get("ready"))

            if wanted_id is not None:
                if magnet_id != wanted_id:
                    continue
            elif needle and (needle not in magnet_name_lower):
                continue

            size_bytes: Optional[int] = None
            try:
                size_val = magnet.get("size")
                if isinstance(size_val, (int, float)):
                    size_bytes = int(size_val)
                elif isinstance(size_val, str) and size_val.isdigit():
                    size_bytes = int(size_val)
            except Exception:
                size_bytes = None

            results.append(
                SearchResult(
                    table="alldebrid",
                    title=magnet_name,
                    path=f"alldebrid:magnet:{magnet_id}",
                    detail=status_text,
                    annotations=["folder"],
                    media_kind="folder",
                    size_bytes=size_bytes,
                    tag={"alldebrid",
                         "folder",
                         str(magnet_id)}
                    | ({"ready"} if ready else {"not-ready"}),
                    columns=[
                        ("Folder",
                         magnet_name),
                        ("ID",
                         str(magnet_id)),
                        ("Status",
                         status_text),
                        ("Ready",
                         "yes" if ready else "no"),
                    ],
                    full_metadata={
                        "magnet": magnet,
                        "magnet_id": magnet_id,
                        "provider": "alldebrid",
                        "provider_view": "folders",
                        "magnet_name": magnet_name,
                    },
                )
            )

            if len(results) >= max(1, limit):
                break

        return results

    def selector(
        self,
        selected_items: List[Any],
        *,
        ctx: Any,
        stage_is_last: bool = True,
        **_kwargs: Any,
    ) -> bool:
        """Handle AllDebrid `@N` selection by drilling into magnet files."""
        if not stage_is_last:
            return False

        def _as_payload(item: Any) -> Dict[str, Any]:
            if isinstance(item, dict):
                return dict(item)
            try:
                if hasattr(item, "to_dict"):
                    maybe = item.to_dict()  # type: ignore[attr-defined]
                    if isinstance(maybe, dict):
                        return maybe
            except Exception:
                pass
            payload: Dict[str, Any] = {}
            try:
                payload = {
                    "title": getattr(item, "title", None),
                    "path": getattr(item, "path", None),
                    "table": getattr(item, "table", None),
                    "annotations": getattr(item, "annotations", None),
                    "media_kind": getattr(item, "media_kind", None),
                    "full_metadata": getattr(item, "full_metadata", None),
                }
            except Exception:
                payload = {}
            return payload

        chosen: List[Dict[str, Any]] = []
        for item in selected_items or []:
            payload = _as_payload(item)
            meta = payload.get("full_metadata") or payload.get("metadata") or {}
            if not isinstance(meta, dict):
                meta = {}

            ann_set: set[str] = set()
            for ann_source in (payload.get("annotations"), meta.get("annotations")):
                if isinstance(ann_source, (list, tuple, set)):
                    for ann in ann_source:
                        ann_text = str(ann or "").strip().lower()
                        if ann_text:
                            ann_set.add(ann_text)

            media_kind = str(payload.get("media_kind") or meta.get("media_kind") or "").strip().lower()
            is_folder = (media_kind == "folder") or ("folder" in ann_set)
            magnet_id = meta.get("magnet_id")
            if magnet_id is None or (not is_folder):
                continue

            title = str(payload.get("title") or meta.get("magnet_name") or meta.get("name") or "").strip()
            if not title:
                title = f"magnet-{magnet_id}"

            chosen.append({
                "magnet_id": magnet_id,
                "title": title,
            })

        if not chosen:
            return False

        target = chosen[0]
        magnet_id = target.get("magnet_id")
        title = target.get("title") or f"magnet-{magnet_id}"

        try:
            files = self.search("*", limit=200, filters={"view": "files", "magnet_id": magnet_id})
        except Exception as exc:
            print(f"alldebrid selector failed: {exc}\n")
            return True

        try:
            from SYS.result_table import ResultTable
            from SYS.rich_display import stdout_console
        except Exception:
            return True

        table = ResultTable(f"AllDebrid Files: {title}").set_preserve_order(True)
        table.set_table("alldebrid")
        try:
            table.set_table_metadata({"provider": "alldebrid", "view": "files", "magnet_id": magnet_id})
        except Exception:
            pass
        table.set_source_command(
            "search-file",
            ["-provider", "alldebrid", "-open", str(magnet_id), "-query", "*"],
        )

        results_payload: List[Dict[str, Any]] = []
        for r in files or []:
            table.add_result(r)
            try:
                results_payload.append(r.to_dict())
            except Exception:
                results_payload.append(
                    {
                        "table": getattr(r, "table", "alldebrid"),
                        "title": getattr(r, "title", ""),
                        "path": getattr(r, "path", ""),
                        "full_metadata": getattr(r, "full_metadata", None),
                    }
                )

        try:
            ctx.set_last_result_table(table, results_payload)
            ctx.set_current_stage_table(table)
        except Exception:
            pass

        try:
            stdout_console().print()
            stdout_console().print(table)
        except Exception:
            pass

        return True