app.py

from flask import Flask, render_template
from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()


def create_app(config=None):
    app = Flask(__name__)
    app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///rentflow.db'
    app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
    app.config['SECRET_KEY'] = 'dev-secret-key'

    if config:
        app.config.update(config)

    db.init_app(app)

    with app.app_context():
        from models import Building  # noqa: ensure models registered
        db.create_all()
        if not app.config.get('TESTING'):
            if Building.query.first() is None:
                from seed import seed_data
                seed_data(db)

    # Register blueprints
    from routes.dashboard import bp as dashboard_bp
    from routes.buildings import bp as buildings_bp
    from routes.units import bp as units_bp
    from routes.payments import bp as payments_bp
    from routes.reports import bp as reports_bp

    app.register_blueprint(dashboard_bp)
    app.register_blueprint(buildings_bp)
    app.register_blueprint(units_bp)
    app.register_blueprint(payments_bp)
    app.register_blueprint(reports_bp)

    # Error handlers
    @app.errorhandler(404)
    def not_found(e):
        return render_template('404.html'), 404

    return app


# Only run if executed directly
if __name__ == '__main__':
    app = create_app()
    app.run(debug=True)