import os
import click
from flask import Flask, jsonify
from app.config import Config
from app.extensions import db, bcrypt, jwt, cors

def create_app(config_class=Config):
    app = Flask(__name__)
    app.config.from_object(config_class)

    # Inicializar extensões
    db.init_app(app)
    bcrypt.init_app(app)
    jwt.init_app(app)
    cors.init_app(app, resources={r"/api/*": {"origins": "*"}})

    # Registrar Blueprints
    from app.routes.auth import auth_bp
    from app.routes.users import users_bp
    from app.routes.leads import leads_bp
    from app.routes.webhooks import webhooks_bp

    app.register_blueprint(auth_bp)
    app.register_blueprint(users_bp)
    app.register_blueprint(leads_bp)
    app.register_blueprint(webhooks_bp)

    # Tratamento global de erros JWT
    @jwt.invalid_token_loader
    def invalid_token_callback(error):
        return jsonify({'error': 'Token JWT inválido ou corrompido.'}), 401

    @jwt.unauthorized_loader
    def missing_token_callback(error):
        return jsonify({'error': 'Cabeçalho de autorização (Bearer token) ausente.'}), 401

    @jwt.expired_token_loader
    def expired_token_callback(jwt_header, jwt_payload):
        return jsonify({'error': 'Token JWT expirado. Faça login novamente.'}), 401

    # Rota de Healthcheck
    @app.route('/health', methods=['GET'])
    def healthcheck():
        return jsonify({
            'status': 'healthy',
            'app': 'LeadRadar Core API',
            'version': '1.0.0'
        }), 200

    # Comando CLI para popular banco com admin inicial se vazio
    @app.cli.command('seed-db')
    def seed_db_command():
        """Popula o banco de dados com usuário Admin inicial se não houver registros."""
        from app.models.user import User
        with app.app_context():
            db.create_all()
            if User.query.count() == 0:
                admin = User(
                    nome='Administrador LeadRadar',
                    email='admin@leadradar.com',
                    role='admin',
                    ativo=True
                )
                admin.set_password('Admin@123456')
                db.session.add(admin)
                db.session.commit()
                click.echo("Usuário Admin padrão criado: admin@leadradar.com / Admin@123456")
            else:
                click.echo("Banco de dados já contém usuários cadastrados.")

    # Auto-criação de tabelas e usuário Admin no startup se o banco estiver vazio
    with app.app_context():
        db.create_all()
        try:
            from app.models.user import User
            if db.session.query(User).count() == 0:
                admin = User(
                    nome='Administrador LeadRadar',
                    email='admin@leadradar.com',
                    role='admin',
                    ativo=True
                )
                admin.set_password('Admin@123456')
                db.session.add(admin)
                db.session.commit()
        except Exception:
            db.session.rollback()

    return app