from flask import Blueprint, Response, request
import json
import os
import traceback
import uuid
import time
from routes.utils.celery_queue_manager import download_queue_manager
from routes.utils.celery_tasks import store_task_info, store_task_status, ProgressState
from routes.utils.get_info import get_spotify_info

album_bp = Blueprint('album', __name__)

@album_bp.route('/download/<album_id>', methods=['GET'])
def handle_download(album_id):
    # Retrieve essential parameters from the request.
    # name = request.args.get('name')
    # artist = request.args.get('artist')
    
    # Construct the URL from album_id
    url = f"https://open.spotify.com/album/{album_id}"
    
    # Fetch metadata from Spotify
    try:
        album_info = get_spotify_info(album_id, "album")
        if not album_info or not album_info.get('name') or not album_info.get('artists'):
            return Response(
                json.dumps({"error": f"Could not retrieve metadata for album ID: {album_id}"}),
                status=404,
                mimetype='application/json'
            )
        
        name_from_spotify = album_info.get('name')
        artist_from_spotify = album_info['artists'][0].get('name') if album_info['artists'] else "Unknown Artist"

    except Exception as e:
        return Response(
            json.dumps({"error": f"Failed to fetch metadata for album {album_id}: {str(e)}"}),
            status=500,
            mimetype='application/json'
        )
    
    # Validate required parameters
    if not url:
        return Response(
            json.dumps({"error": "Missing required parameter: url"}),
            status=400,
            mimetype='application/json'
        )

    # Add the task to the queue with only essential parameters
    # The queue manager will now handle all config parameters
    # Include full original request URL in metadata
    orig_params = request.args.to_dict()
    orig_params["original_url"] = request.url
    try:
        task_id = download_queue_manager.add_task({
            "download_type": "album",
            "url": url,
            "name": name_from_spotify,
            "artist": artist_from_spotify,
            "orig_request": orig_params
        })
    except Exception as e:
        # Generic error handling for other issues during task submission
        # Create an error task ID if add_task itself fails before returning an ID
        error_task_id = str(uuid.uuid4())
        
        store_task_info(error_task_id, {
            "download_type": "album",
            "url": url,
            "name": name_from_spotify,
            "artist": artist_from_spotify,
            "original_request": orig_params,
            "created_at": time.time(),
            "is_submission_error_task": True
        })
        store_task_status(error_task_id, {
            "status": ProgressState.ERROR,
            "error": f"Failed to queue album download: {str(e)}",
            "timestamp": time.time()
        })
        return Response(
            json.dumps({"error": f"Failed to queue album download: {str(e)}", "task_id": error_task_id}),
            status=500,
            mimetype='application/json'
        )
    
    return Response(
        json.dumps({"prg_file": task_id}),
        status=202,
        mimetype='application/json'
    )

@album_bp.route('/download/cancel', methods=['GET'])
def cancel_download():
    """
    Cancel a running download process by its prg file name.
    """
    prg_file = request.args.get('prg_file')
    if not prg_file:
        return Response(
            json.dumps({"error": "Missing process id (prg_file) parameter"}),
            status=400,
            mimetype='application/json'
        )

    # Use the queue manager's cancellation method.
    result = download_queue_manager.cancel_task(prg_file)
    status_code = 200 if result.get("status") == "cancelled" else 404

    return Response(
        json.dumps(result),
        status=status_code,
        mimetype='application/json'
    )

@album_bp.route('/info', methods=['GET'])
def get_album_info():
    """
    Retrieve Spotify album metadata given a Spotify album ID.
    Expects a query parameter 'id' that contains the Spotify album ID.
    """
    spotify_id = request.args.get('id')
    
    if not spotify_id:
        return Response(
            json.dumps({"error": "Missing parameter: id"}),
            status=400,
            mimetype='application/json'
        )
    
    try:
        # Import and use the get_spotify_info function from the utility module.
        from routes.utils.get_info import get_spotify_info
        album_info = get_spotify_info(spotify_id, "album")
        return Response(
            json.dumps(album_info),
            status=200,
            mimetype='application/json'
        )
    except Exception as e:
        error_data = {
            "error": str(e),
            "traceback": traceback.format_exc()
        }
        return Response(
            json.dumps(error_data),
            status=500,
            mimetype='application/json'
        )