CREATE TABLE IF NOT EXISTS booking_delivery_codes (
  booking_id INT UNSIGNED NOT NULL,
  code CHAR(4) NOT NULL,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (booking_id),
  CONSTRAINT fk_delivery_code_booking FOREIGN KEY (booking_id) REFERENCES service_bookings (id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS booking_ratings (
  id INT UNSIGNED NOT NULL AUTO_INCREMENT,
  booking_id INT UNSIGNED NOT NULL,
  customer_id INT UNSIGNED NOT NULL,
  stars TINYINT UNSIGNED NOT NULL,
  note VARCHAR(300) DEFAULT NULL,
  created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_rating_booking (booking_id),
  CONSTRAINT fk_rating_booking FOREIGN KEY (booking_id) REFERENCES service_bookings (id) ON DELETE CASCADE,
  CONSTRAINT fk_rating_customer FOREIGN KEY (customer_id) REFERENCES users (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;