"""init module for the Flask application."""

import logging

from flask import Flask

from app.config import Config
from app.database import engine
from app.migrations import run_migrations
from app.models import Base
from app.views import bp


def create_app():
    """Create and configure an instance of the Flask application."""
    app = Flask(__name__, instance_relative_config=True)
    app.config.from_object(Config)

    # Set up Flask logger
    if not app.logger.handlers:
        handler = logging.StreamHandler()
        handler.setFormatter(
            logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
        )
        app.logger.addHandler(handler)
    app.logger.setLevel(logging.DEBUG)

    # Create database tables if they don't exist
    Base.metadata.create_all(engine)

    # Register blueprints
    app.register_blueprint(bp)

    # Run migrations after tables are created
    with app.app_context():
        run_migrations(app)

    app.logger.info("Application initialized successfully")

    return app