# Anime Sites Downloaders

## OVERVIEW
Handlers for French anime streaming catalogs that provide metadata and episode listings, delegating actual video extraction to video player handlers.

## WHERE TO LOOK

| File | Purpose |
|------|---------|
| `base.py` | Abstract `BaseAnimeSite` class defining the interface all anime sites implement |
| `animesama.py` | Primary provider with dynamic domain switching, multiple video player extraction |
| `nekosama.py` | Neko-Sama / Gupy integration (metadata-only, no direct downloads) |
| `animeultime.py` | Anime-Ultime catalog handler |
| `vostfree.py` | Vostfree catalog handler |
| `frenchmanga.py` | French-Manga catalog handler |

## CONVENTIONS

### Interface Contract
Each site must implement four async methods from `BaseAnimeSite`:
- `can_handle(url: str) -> bool` — URL pattern matching
- `search_anime(query, lang) -> list[dict]` — Returns `{title, url, cover_image}`
- `get_episodes(anime_url, lang) -> list[dict]` — Returns `{episode_number, url, title, host}`
- `get_anime_metadata(anime_url) -> dict` — Returns `{synopsis, genres, rating, release_year, studio, poster_image, total_episodes, status}`
- `get_download_link(url) -> tuple[str, str]` — Returns `(video_player_url, filename)`

### Key Patterns
- **Pipe-separated URLs**: `video_url|anime_page_url|episode_title` — preserves context across extraction
- **Language parameter**: `lang="vostfr"` or `"vf"` — controls which episodes to return
- **Video player delegation**: Anime sites return player URLs (vidmoly, sendvid, sibnet, lpayer), not direct downloads
- **Filename generation**: `{anime_name} - S{season} - {episode}.mp4` format
- **HTTP headers**: Browser UA and referer required to avoid blocking

### Domain Detection
- `AnimeSamaDownloader` fetches current domain from `anime-sama.pw` dynamically
- Uses fallback chain for video extraction: detected player → cached player → priority list

### Error Handling
- Raise `Exception` with descriptive message on failure
- Log at appropriate level (`debug` for expected failures, `error` for unexpected)
- Validate extracted URLs with `_test_video_url()` before returning
