"""Tests for indexer/enrich.py — season/title corroboration and the end-to-end pool."""

import asyncio
import shutil
import subprocess
from pathlib import Path

import pytest

from meshbay_common.protocol import IndexEntry
from meshbay_node.indexer.enrich import Enricher, _season_from_ancestors, _title_from_siblings
from meshbay_node.media_cache import MediaCache

_HAVE_FFMPEG = shutil.which("ffmpeg") and shutil.which("ffprobe")


# ── pure helpers, no ffmpeg needed ───────────────────────────────────────────

def test_season_from_ancestors_finds_season_folder(tmp_path):
    folder = tmp_path / "Some Show" / "Season 2"
    folder.mkdir(parents=True)
    ep = folder / "01 - Episode Title.mkv"
    ep.touch()

    assert _season_from_ancestors(ep) == 2


def test_season_from_ancestors_none_when_no_season_folder(tmp_path):
    folder = tmp_path / "Movies"
    folder.mkdir()
    f = folder / "Some Movie 2015.mkv"
    f.touch()

    assert _season_from_ancestors(f) is None


def test_title_from_siblings_borrows_from_a_titled_sibling(tmp_path):
    folder = tmp_path / "Acronym Show"
    folder.mkdir()
    titled = folder / "Some.Show.Name.S01E01.720p.mkv"
    untitled = folder / "S01E02.SUBFRENCH.720p.mkv"
    titled.touch()
    untitled.touch()

    assert _title_from_siblings(untitled) == "Some Show Name"


def test_title_from_siblings_none_when_no_titled_sibling(tmp_path):
    folder = tmp_path / "Acronym Show"
    folder.mkdir()
    (folder / "S01E02.mkv").touch()

    assert _title_from_siblings(folder / "S01E02.mkv") is None


# ── end-to-end against a real (tiny, synthetic) video file ──────────────────

pytestmark_ffmpeg = pytest.mark.skipif(not _HAVE_FFMPEG, reason="ffmpeg/ffprobe not installed")


def _make_clip(path: Path) -> None:
    subprocess.run(
        ["ffmpeg", "-hide_banner", "-loglevel", "error", "-y",
         "-f", "lavfi", "-i", "testsrc=size=320x240:rate=25:duration=1",
         "-c:v", "libx264", "-preset", "ultrafast", "-an", str(path)],
        check=True, capture_output=True,
    )


@pytest.fixture
async def media_cache(tmp_path):
    c = MediaCache(db_path=tmp_path / "media_cache.db")
    await c.open()
    yield c
    await c.close()


@pytestmark_ffmpeg
@pytest.mark.asyncio
async def test_enricher_populates_fields_and_stores_thumbnail(tmp_path, media_cache):
    clip = tmp_path / "Some.Movie.2015.1080p.mkv"
    _make_clip(clip)
    entry = IndexEntry(id="fileid1", name=clip.name, path=clip.name,
                        size=clip.stat().st_size, type="video", added_at=0)

    enricher = Enricher(media_cache)
    done = asyncio.get_event_loop().create_future()

    async def on_done(file_id, fields):
        done.set_result((file_id, fields))

    enricher.spawn(entry, clip, on_done)
    file_id, fields = await asyncio.wait_for(done, timeout=30)

    assert file_id == "fileid1"
    assert fields["width"] == 320
    assert fields["height"] == 240
    assert fields["display_title"] == "Some Movie"
    assert fields.get("thumb_hash")
    stored = await media_cache.get_thumb(fields["thumb_hash"])
    assert stored is not None and len(stored) > 0


@pytestmark_ffmpeg
@pytest.mark.asyncio
async def test_enricher_handles_episode_with_season_from_folder(tmp_path, media_cache):
    # Filename carries only a bare episode number, no SxxExx token — guessit
    # confirmed (separately) not to find a season here at all — so the
    # season must come from the ancestor folder (§3.4's non-standard case).
    folder = tmp_path / "Some Show" / "Saison 3"
    folder.mkdir(parents=True)
    titled_sibling = folder / "Some.Show.Episode.06.mkv"
    titled_sibling.touch()
    clip = folder / "Episode.07.720p.mkv"
    _make_clip(clip)
    entry = IndexEntry(id="fileid2", name=clip.name, path=str(clip.relative_to(tmp_path)),
                        size=clip.stat().st_size, type="video", added_at=0)

    enricher = Enricher(media_cache)
    done = asyncio.get_event_loop().create_future()

    async def on_done(file_id, fields):
        done.set_result((file_id, fields))

    enricher.spawn(entry, clip, on_done)
    file_id, fields = await asyncio.wait_for(done, timeout=30)

    assert fields["display_title"] == "Some Show"
    assert fields["season"] == 3
    assert fields["episode"] == 7