"""Recherche multi-sources, fiches de titres et extraction de liens vidéo."""

import asyncio
import dataclasses
import logging
from typing import Annotated

from fastapi import APIRouter, Depends, HTTPException, Query

from app.routers.auth import CurrentUser, current_user
from app.scrapers.base import (
    ScrapeError,
    SourceScraper,
    VideoLink,
    all_sources,
    get_source,
    import_all_scrapers,
    resolve_hoster,
)
from app.services.kitsu import KitsuService
from app.services.settings import is_source_enabled

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/api", tags=["search"], dependencies=[Depends(current_user)])

import_all_scrapers()
kitsu = KitsuService()

# Types de médias gardés selon la préférence : les films restent avec les animés
# (cinéma d'animation), une future source séries les exclurait donc du mode « séries ».
_PREFERENCE_MEDIA_TYPES = {
    "anime": {"anime", "film"},
    "serie": {"serie"},
    "both": {"anime", "serie", "film"},
}


def _allowed_media_types(preference: str) -> set[str]:
    return _PREFERENCE_MEDIA_TYPES.get(preference, _PREFERENCE_MEDIA_TYPES["both"])


async def enabled_sources(allowed: set[str] | None = None) -> list[SourceScraper]:
    """Sources activées, limitées à celles pouvant servir les types de médias autorisés."""
    sources = []
    for source in all_sources():
        if not await is_source_enabled(source.name):
            continue
        if allowed is not None and not set(source.media_types) & allowed:
            continue
        sources.append(source)
    return sources


    sources = []
    for source in all_sources():
        if await is_source_enabled(source.name):
            sources.append(source)


@router.get("/sources")
async def list_sources() -> list[dict]:
    """Sources disponibles avec leur état d'activation."""
    return [
        {
            "name": source.name,
            "label": source.label,
            "base_url": source.base_url,
            "media_types": list(source.media_types),
            "enabled": await is_source_enabled(source.name),
        }
        for source in all_sources()
    ]


@router.get("/search")
async def search(q: Annotated[str, Query(min_length=2)], user: CurrentUser) -> dict:
    """Recherche unifiée : une requête interroge toutes les sources activées."""
    allowed = _allowed_media_types(user.content_preference)
    sources = await enabled_sources(allowed)

    async def safe_search(source: SourceScraper) -> tuple[list, str | None]:
        try:
            results = [dataclasses.asdict(r) for r in await source.search(q)]
            return results, None
        except ScrapeError as exc:
            logger.error("Recherche échouée sur %s : %s", source.name, exc)
            return [], source.name

    outcomes = await asyncio.gather(*(safe_search(s) for s in sources))
    results = [item for items, _ in outcomes for item in items]
    results = [r for r in results if r.get("media_type", "anime") in allowed]
    failed = [name for _, name in outcomes if name]
    return {"query": q, "count": len(results), "results": results, "failed_sources": failed}


@router.get("/titles/{source}/{source_id:path}")
async def title_details(source: str, source_id: str, enrich: bool = True) -> dict:
    """Fiche détaillée d'un titre (+ enrichissement Kitsu des champs manquants)."""
    scraper = get_source(source)
    try:
        details = await scraper.get_details(source_id)
    except ScrapeError as exc:
        raise HTTPException(502, detail=str(exc)) from exc
    if enrich:
        details = await kitsu.enrich(details)
    return dataclasses.asdict(details)


@router.get("/episodes/{source}/{source_id:path}")
async def list_episodes(source: str, source_id: str) -> dict:
    scraper = get_source(source)
    try:
        episodes = await scraper.list_episodes(source_id)
    except ScrapeError as exc:
        raise HTTPException(502, detail=str(exc)) from exc
    return {"episodes": [dataclasses.asdict(e) for e in episodes]}


@router.get("/extract")
async def extract(episode_url: Annotated[str, Query()]) -> dict:
    """Résout la chaîne complète : page d'épisode → embeds → URL vidéo directe."""
    try:
        source = _find_source_for_url(episode_url)
        embeds = await source.extract_embed_links(episode_url)
    except ScrapeError as exc:
        raise HTTPException(502, detail=str(exc)) from exc

    links: list[dict] = []
    errors: list[str] = []
    for embed in embeds:
        extractor = resolve_hoster(embed)
        if extractor is None:
            errors.append(f"Hébergeur non supporté : {embed}")
            logger.warning("Aucun extracteur pour %s", embed)
            continue
        try:
            link: VideoLink = await extractor.extract(embed)
            data = dataclasses.asdict(link)
            data["embed_url"] = embed
            links.append(data)
        except ScrapeError as exc:
            errors.append(str(exc))
            logger.error("Extraction échouée pour %s : %s", embed, exc)

    if not links and not embeds:
        raise HTTPException(502, detail="Aucun lecteur trouvé sur la page de l'épisode")
    return {"episode_url": episode_url, "links": links, "errors": errors}


def _find_source_for_url(url: str) -> SourceScraper:
    for source in all_sources():
        if source.base_url.split("//")[-1].split("/")[0] in url:
            return source
    raise ScrapeError(f"Aucune source ne correspond à l'URL : {url}")