"""
Flask application factory for Podcastrr.
"""
import os
from flask import Flask
from flask_migrate import Migrate

# Import blueprints
from app.web.routes.main import main_bp
from app.web.routes.podcasts import podcasts_bp
from app.web.routes.settings import settings_bp
from app.web.routes.api import api_bp

# Import database
from app.models.database import db

def create_app(config=None):
    """
    Create and configure the Flask application.
    
    Args:
        config: Configuration object or path to configuration file.
        
    Returns:
        Flask application instance.
    """
    app = Flask(__name__, 
                template_folder='../../templates',
                static_folder='../../static')
    
    # Load default configuration
    app.config.from_mapping(
        SECRET_KEY=os.environ.get('SECRET_KEY', 'dev'),
        SQLALCHEMY_DATABASE_URI=os.environ.get('DATABASE_URI', 'sqlite:///podcastrr.db'),
        SQLALCHEMY_TRACK_MODIFICATIONS=False,
        DOWNLOAD_PATH=os.environ.get('DOWNLOAD_PATH', os.path.join(os.getcwd(), 'downloads')),
    )
    
    # Load additional configuration if provided
    if config:
        app.config.from_mapping(config)
    
    # Initialize extensions
    db.init_app(app)
    Migrate(app, db)
    
    # Register blueprints
    app.register_blueprint(main_bp)
    app.register_blueprint(podcasts_bp, url_prefix='/podcasts')
    app.register_blueprint(settings_bp, url_prefix='/settings')
    app.register_blueprint(api_bp, url_prefix='/api')
    
    # Ensure the download directory exists
    os.makedirs(app.config['DOWNLOAD_PATH'], exist_ok=True)
    
    return app