CREATE TABLE IF NOT EXISTS routes (
    id INT AUTO_INCREMENT PRIMARY KEY,
    origin VARCHAR(255) NOT NULL,
    destination VARCHAR(255) NOT NULL,
    distance DECIMAL(10, 2),
    status VARCHAR(50) DEFAULT 'planned',
    departure_time TIMESTAMP NULL,
    arrival_time TIMESTAMP NULL,
    driver_id INT,
    vehicle_id INT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (driver_id) REFERENCES drivers(id) ON DELETE SET NULL,
    FOREIGN KEY (vehicle_id) REFERENCES vehicles(id) ON DELETE SET NULL
);