"""Series endpoints (section 17)."""

from __future__ import annotations

from typing import Literal

from fastapi import APIRouter, Depends, HTTPException, Query, status
from redis.asyncio import Redis
from sqlalchemy.ext.asyncio import AsyncSession

from app.api.deps import cached_response, get_current_user, not_found
from app.core.database import get_db
from app.core.redis import get_redis
from app.core.security import enforce_rate_limit
from app.models.user import User
from app.schemas.account import RatingIn, RatingOut
from app.schemas.tv import (
    SeriesCreditsOut,
    SeriesDetailOut,
    SeriesImagesOut,
    SeriesListOut,
    SeriesSeasonsOut,
    SeriesVideosOut,
    SeriesWatchProvidersOut,
)
from app.services import tv_service
from app.services.cache import build_key

router = APIRouter(prefix="/series", tags=["series"], dependencies=[Depends(enforce_rate_limit)])


@router.get("", response_model=SeriesListOut)
async def list_series(
    genre: str | None = Query(None, description="Aurora genre id, e.g. aur_genre_..."),
    keyword: str | None = Query(None, description="Aurora keyword id, e.g. aur_keyword_..."),
    year: int | None = Query(None, description="First air date year"),
    status_: str | None = Query(None, alias="status", description="Series status, e.g. ended"),
    sort_by: Literal["popularity", "first_air_date", "vote_average", "title"] = Query("popularity"),
    sort_dir: Literal["asc", "desc"] = Query("desc"),
    page: int = Query(1, ge=1),
    page_size: int = Query(20, ge=1, le=50),
    session: AsyncSession = Depends(get_db),
) -> SeriesListOut:
    try:
        return await tv_service.list_series(
            session,
            genre_aurora_id=genre,
            keyword_aurora_id=keyword,
            year=year,
            status=status_,
            sort_by=sort_by,
            sort_dir=sort_dir,
            page=page,
            page_size=page_size,
        )
    except tv_service.InvalidSeriesFilterError as exc:
        raise HTTPException(status.HTTP_422_UNPROCESSABLE_CONTENT, str(exc)) from exc


@router.get("/trending", response_model=SeriesListOut)
async def trending_series(
    time_window: Literal["day", "week"] = Query("day", alias="window"),
    page: int = Query(1, ge=1),
    page_size: int = Query(20, ge=1, le=50),
    session: AsyncSession = Depends(get_db),
) -> SeriesListOut:
    try:
        return await tv_service.list_trending(
            session, time_window=time_window, page=page, page_size=page_size
        )
    except tv_service.InvalidSeriesFilterError as exc:
        raise HTTPException(status.HTTP_422_UNPROCESSABLE_CONTENT, str(exc)) from exc


@router.get("/{aurora_id}", response_model=SeriesDetailOut)
async def get_series(
    aurora_id: str,
    session: AsyncSession = Depends(get_db),
    redis: Redis = Depends(get_redis),
) -> SeriesDetailOut:
    try:
        return await cached_response(
            redis,
            build_key("series", aurora_id),
            SeriesDetailOut,
            lambda: tv_service.get_series_detail(session, aurora_id),
        )
    except tv_service.SeriesNotFoundError as exc:
        raise not_found("series", aurora_id) from exc


@router.get("/{aurora_id}/seasons", response_model=SeriesSeasonsOut)
async def get_series_seasons(
    aurora_id: str, session: AsyncSession = Depends(get_db)
) -> SeriesSeasonsOut:
    try:
        return await tv_service.get_series_seasons(session, aurora_id)
    except tv_service.SeriesNotFoundError as exc:
        raise not_found("series", aurora_id) from exc


@router.get("/{aurora_id}/credits", response_model=SeriesCreditsOut)
async def get_series_credits(
    aurora_id: str, session: AsyncSession = Depends(get_db)
) -> SeriesCreditsOut:
    try:
        return await tv_service.get_series_credits(session, aurora_id)
    except tv_service.SeriesNotFoundError as exc:
        raise not_found("series", aurora_id) from exc


@router.get("/{aurora_id}/images", response_model=SeriesImagesOut)
async def get_series_images(
    aurora_id: str, session: AsyncSession = Depends(get_db)
) -> SeriesImagesOut:
    try:
        return await tv_service.get_series_images(session, aurora_id)
    except tv_service.SeriesNotFoundError as exc:
        raise not_found("series", aurora_id) from exc


@router.get("/{aurora_id}/videos", response_model=SeriesVideosOut)
async def get_series_videos(
    aurora_id: str, session: AsyncSession = Depends(get_db)
) -> SeriesVideosOut:
    try:
        return await tv_service.get_series_videos(session, aurora_id)
    except tv_service.SeriesNotFoundError as exc:
        raise not_found("series", aurora_id) from exc


@router.get("/{aurora_id}/watch-providers", response_model=SeriesWatchProvidersOut)
async def get_series_watch_providers(
    aurora_id: str, session: AsyncSession = Depends(get_db)
) -> SeriesWatchProvidersOut:
    try:
        return await tv_service.get_series_watch_providers(session, aurora_id)
    except tv_service.SeriesNotFoundError as exc:
        raise not_found("series", aurora_id) from exc


@router.put("/{aurora_id}/rating", response_model=RatingOut)
async def rate_series(
    aurora_id: str,
    body: RatingIn,
    user: User = Depends(get_current_user),
    session: AsyncSession = Depends(get_db),
) -> RatingOut:
    try:
        return await tv_service.rate_series(session, aurora_id, user_id=user.id, value=body.value)
    except tv_service.SeriesNotFoundError as exc:
        raise not_found("series", aurora_id) from exc


@router.delete("/{aurora_id}/rating", status_code=status.HTTP_204_NO_CONTENT)
async def unrate_series(
    aurora_id: str,
    user: User = Depends(get_current_user),
    session: AsyncSession = Depends(get_db),
) -> None:
    try:
        await tv_service.unrate_series(session, aurora_id, user_id=user.id)
    except tv_service.SeriesNotFoundError as exc:
        raise not_found("series", aurora_id) from exc


@router.post("/{aurora_id}/watchlist", status_code=status.HTTP_204_NO_CONTENT)
async def add_series_to_watchlist(
    aurora_id: str,
    user: User = Depends(get_current_user),
    session: AsyncSession = Depends(get_db),
) -> None:
    try:
        await tv_service.add_series_to_watchlist(session, aurora_id, user_id=user.id)
    except tv_service.SeriesNotFoundError as exc:
        raise not_found("series", aurora_id) from exc


@router.delete("/{aurora_id}/watchlist", status_code=status.HTTP_204_NO_CONTENT)
async def remove_series_from_watchlist(
    aurora_id: str,
    user: User = Depends(get_current_user),
    session: AsyncSession = Depends(get_db),
) -> None:
    try:
        await tv_service.remove_series_from_watchlist(session, aurora_id, user_id=user.id)
    except tv_service.SeriesNotFoundError as exc:
        raise not_found("series", aurora_id) from exc