"""Bandcamp discovery using their public APIs (no scraping)."""

import httpx

HEADERS = {
    "User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:128.0) Gecko/20100101 Firefox/128.0",
}

DIG_DEEPER_URL = "https://bandcamp.com/api/hub/2/dig_deeper"


async def discover_by_tag(
    tags: list[str],
    sort: str = "new",
    page: int = 1,
) -> list[dict]:
    """Discover new music on Bandcamp by tag using their public API.

    Args:
        tags: List of genre/tag strings (e.g. ["indie-rock", "shoegaze"])
        sort: "new", "rec", or "pop" (new releases, recommended, popular)
        page: Page number for pagination

    Returns list of releases with: title, artist, art_url, bandcamp_url, genre, item_type
    """
    async with httpx.AsyncClient(timeout=15, headers=HEADERS) as client:
        resp = await client.post(
            DIG_DEEPER_URL,
            json={
                "filters": {
                    "format": "all",
                    "location": 0,
                    "sort": sort,
                    "tags": tags,
                },
                "page": page,
            },
        )

    if resp.status_code != 200:
        return []

    data = resp.json()
    results = []

    for item in data.get("items", []):
        art_id = item.get("art_id")
        art_url = f"https://f4.bcbits.com/img/a{art_id}_16.jpg" if art_id else None

        tralbum_type = item.get("tralbum_type", "a")
        type_path = "album" if tralbum_type == "a" else "track"
        item_url = item.get("tralbum_url", "")

        results.append({
            "title": item.get("title", ""),
            "artist": item.get("artist", ""),
            "art_url": art_url,
            "bandcamp_url": item_url,
            "genre": ", ".join(tags),
            "item_type": type_path,
        })

    return results


async def get_trending_tags() -> list[str]:
    """Return common Bandcamp genre tags for discovery."""
    return [
        "indie-rock", "electronic", "hip-hop-rap", "ambient", "punk",
        "experimental", "folk", "jazz", "metal", "pop", "r-b-soul",
        "shoegaze", "post-punk", "synthwave", "lo-fi", "dream-pop",
        "indie-pop", "psychedelic", "garage-rock", "emo",
    ]