-- Table structure for table `staff`
CREATE TABLE IF NOT EXISTS `staff` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(100) NOT NULL,
  `phone` varchar(20) DEFAULT NULL,
  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Insert initial staff data
INSERT INTO `staff` (`id`, `name`, `phone`) VALUES
(1, 'นางจิตติมา', '08X-XXX-4451'),
(2, 'นายพงษ์ศักดิ์', '08X-XXX-5514'),
(3, 'นางสาวกานต์', '08X-XXX-9616'),
(4, 'นายประวิทย์', '08X-XXX-0935'),
(5, 'นางพรพิมล', '08X-XXX-9731')
ON DUPLICATE KEY UPDATE `name`=VALUES(`name`), `phone`=VALUES(`phone`);

-- Table structure for table `schedules`
CREATE TABLE IF NOT EXISTS `schedules` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `staff_id` int(11) NOT NULL,
  `year` int(4) NOT NULL,
  `month` int(2) NOT NULL,
  `day` int(2) NOT NULL,
  `shift_type` varchar(10) NOT NULL,
  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `unique_schedule` (`staff_id`,`year`,`month`,`day`),
  CONSTRAINT `fk_schedules_staff` FOREIGN KEY (`staff_id`) REFERENCES `staff` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;