"""Administrative/provider endpoints (section 17): trigger ingestion and
check job status. Separately protected by an admin API key — never mounted
on the public read path.
"""

from __future__ import annotations

import uuid

from arq import ArqRedis
from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import BaseModel
from sqlalchemy.ext.asyncio import AsyncSession

from app.api.deps import not_found
from app.core.database import get_db
from app.core.queue import get_queue
from app.core.security import require_admin_api_key
from app.repositories.provider_repository import get_ingestion_job
from app.services.ingestion.runner import get_or_create_ingestion_job

router = APIRouter(
    prefix="/admin",
    tags=["admin"],
    dependencies=[Depends(require_admin_api_key)],
)


class IngestMovieRequest(BaseModel):
    tmdb_id: str


class IngestPersonRequest(BaseModel):
    tmdb_id: str


class IngestSeriesRequest(BaseModel):
    tmdb_id: str
    # When true, ingest_series_task also enqueues an ingest_season job for
    # every season the series has, once the series itself finishes.
    # Defaults to false: a show can have dozens of seasons, and cascading
    # automatically means dozens of TMDb calls fired off from one request —
    # opt in rather than surprise the caller with that.
    include_seasons: bool = False


class IngestSeasonRequest(BaseModel):
    tmdb_id: str
    season_number: int


class IngestCollectionRequest(BaseModel):
    tmdb_id: str


class IngestionEnqueuedOut(BaseModel):
    job_id: str
    arq_job_id: str
    status: str = "enqueued"


class IngestionJobOut(BaseModel):
    id: str
    job_type: str
    entity_type: str | None
    external_id: str | None
    status: str
    attempts: int
    error: str | None
    result_aurora_id: str | None


async def _enqueue(
    queue: ArqRedis,
    *,
    job_type: str,
    entity_type: str,
    external_id: str,
    task_name: str,
    task_args: tuple = (),
) -> IngestionEnqueuedOut:
    # The IngestionJob row is created synchronously (and idempotently — the
    # same external_id reuses the same row) so the response's job_id is
    # immediately valid against GET /ingest/jobs/{job_id}. arq's own job id
    # is a separate, unrelated identifier used only for queue bookkeeping.
    job_id = await get_or_create_ingestion_job(job_type, entity_type, external_id)
    arq_job = await queue.enqueue_job(task_name, str(job_id), *task_args)
    if arq_job is None:
        raise HTTPException(
            status.HTTP_503_SERVICE_UNAVAILABLE, "Could not enqueue ingestion job (queue busy)."
        )
    return IngestionEnqueuedOut(job_id=str(job_id), arq_job_id=arq_job.job_id)


@router.post("/ingest/movie", response_model=IngestionEnqueuedOut)
async def enqueue_movie_ingestion(
    body: IngestMovieRequest, queue: ArqRedis = Depends(get_queue)
) -> IngestionEnqueuedOut:
    return await _enqueue(
        queue,
        job_type="movie_sync",
        entity_type="movie",
        external_id=body.tmdb_id,
        task_name="ingest_movie_task",
        task_args=(body.tmdb_id,),
    )


@router.post("/ingest/person", response_model=IngestionEnqueuedOut)
async def enqueue_person_ingestion(
    body: IngestPersonRequest, queue: ArqRedis = Depends(get_queue)
) -> IngestionEnqueuedOut:
    return await _enqueue(
        queue,
        job_type="person_sync",
        entity_type="person",
        external_id=body.tmdb_id,
        task_name="ingest_person_task",
        task_args=(body.tmdb_id,),
    )


@router.post("/ingest/series", response_model=IngestionEnqueuedOut)
async def enqueue_series_ingestion(
    body: IngestSeriesRequest, queue: ArqRedis = Depends(get_queue)
) -> IngestionEnqueuedOut:
    return await _enqueue(
        queue,
        job_type="series_sync",
        entity_type="series",
        external_id=body.tmdb_id,
        task_name="ingest_series_task",
        task_args=(body.tmdb_id, body.include_seasons),
    )


@router.post("/ingest/season", response_model=IngestionEnqueuedOut)
async def enqueue_season_ingestion(
    body: IngestSeasonRequest, queue: ArqRedis = Depends(get_queue)
) -> IngestionEnqueuedOut:
    # Season ingestion requires the series to already be ingested — see
    # app/services/ingestion/series_ingestion.py:ingest_season.
    return await _enqueue(
        queue,
        job_type="season_sync",
        entity_type="season",
        external_id=f"{body.tmdb_id}:{body.season_number}",
        task_name="ingest_season_task",
        task_args=(body.tmdb_id, body.season_number),
    )


@router.post("/ingest/collection", response_model=IngestionEnqueuedOut)
async def enqueue_collection_ingestion(
    body: IngestCollectionRequest, queue: ArqRedis = Depends(get_queue)
) -> IngestionEnqueuedOut:
    # Membership only links movies already ingested into Aurora (never a
    # stub) -- see app/services/ingestion/collection_ingestion.py -- so
    # ingesting the franchise's movies first (or re-running this afterward)
    # is what fills the list in.
    return await _enqueue(
        queue,
        job_type="collection_sync",
        entity_type="collection",
        external_id=body.tmdb_id,
        task_name="ingest_collection_task",
        task_args=(body.tmdb_id,),
    )


@router.get("/ingest/jobs/{job_id}", response_model=IngestionJobOut)
async def get_ingestion_job_status(
    job_id: uuid.UUID, session: AsyncSession = Depends(get_db)
) -> IngestionJobOut:
    job = await get_ingestion_job(session, job_id)
    if job is None:
        raise not_found("ingestion_job", str(job_id))
    return IngestionJobOut(
        id=str(job.id),
        job_type=job.job_type,
        entity_type=job.entity_type,
        external_id=job.external_id,
        status=job.status.value,
        attempts=job.attempts,
        error=job.error,
        result_aurora_id=str(job.result_aurora_id) if job.result_aurora_id else None,
    )