from __future__ import annotations

from sanic import response
from sqlalchemy import select

from app.core.models.content_v3 import EncryptedContent, ContentDerivative
from app.core._config import PROJECT_HOST


async def s_api_v1_content_derivatives(request):
    cid = request.args.get('cid')
    if not cid:
        return response.json({"error": "BAD_REQUEST"}, status=400)
    session = request.ctx.db_session
    ec = (await session.execute(select(EncryptedContent).where(EncryptedContent.encrypted_cid == cid))).scalars().first()
    if not ec:
        return response.json({"error": "NOT_FOUND"}, status=404)
    rows = (await session.execute(select(ContentDerivative).where(ContentDerivative.content_id == ec.id))).scalars().all()
    out = []
    for r in rows:
        # Derive /api/v1.5/storage/<hash> from local_path if possible
        path_hash = (r.local_path or '').split('/')[-1]
        storage_url = f"{PROJECT_HOST}/api/v1.5/storage/{path_hash}" if path_hash else None
        out.append({
            'kind': r.kind,
            'interval': [r.interval_start_ms, r.interval_end_ms] if r.interval_start_ms is not None else None,
            'content_type': r.content_type,
            'size_bytes': r.size_bytes,
            'status': r.status,
            'url': storage_url,
        })
    return response.json({'cid': cid, 'derivatives': out})