"""Serve locally-cached images.

No authentication required — image IDs are opaque and unguessable (based
on the SHA-256 of the original URL).  Images are served with a 1-day
Cache-Control header so the browser doesn't re-request on every page load.
"""

import logging

from quart import Blueprint, jsonify, send_file

from fabledassistant.services.images import get_image_path, get_image_record

logger = logging.getLogger(__name__)

images_bp = Blueprint("images", __name__, url_prefix="/api/images")


@images_bp.route("/<int:image_id>", methods=["GET"])
async def serve_image(image_id: int):
    """Serve a locally-cached image by its DB ID."""
    record = await get_image_record(image_id)
    if record is None:
        return jsonify({"error": "Image not found"}), 404

    file_path = get_image_path(record)
    if not file_path.exists():
        logger.warning("Image file missing on disk for id=%d (%s)", image_id, file_path)
        return jsonify({"error": "Image file not found"}), 404

    return await send_file(
        file_path,
        mimetype=record.content_type,
        max_age=86400,
    )