-- Create loyalty_points_history table
CREATE TABLE IF NOT EXISTS loyalty_points_history (
    id INT AUTO_INCREMENT PRIMARY KEY,
    customer_id INT NOT NULL,
    order_id INT DEFAULT NULL,
    points_change INT NOT NULL,
    reason VARCHAR(255) DEFAULT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (customer_id) REFERENCES customers(id) ON DELETE CASCADE,
    FOREIGN KEY (order_id) REFERENCES orders(id) ON DELETE SET NULL
);