-- SUFW Terminbuchung: Bestätigungsfluss, Test-Mailausgang und iCalendar-Feeds
-- Diese Migration ergänzt das Anfangsschema und kann gefahrlos erneut laufen.

ALTER TABLE `sufw_booking_registrations`
  ADD COLUMN IF NOT EXISTS `confirmation_token_hash` char(64) DEFAULT NULL AFTER `privacy_accepted_at`,
  ADD COLUMN IF NOT EXISTS `confirmation_expires_at` datetime DEFAULT NULL AFTER `confirmation_token_hash`,
  ADD COLUMN IF NOT EXISTS `confirmed_at` datetime DEFAULT NULL AFTER `confirmation_expires_at`,
  ADD COLUMN IF NOT EXISTS `removed_at` datetime DEFAULT NULL AFTER `confirmed_at`;

CREATE TABLE IF NOT EXISTS `sufw_booking_project_settings` (
  `project` varchar(32) NOT NULL,
  `feed_token` char(64) NOT NULL,
  `updated_at` datetime NOT NULL DEFAULT current_timestamp() ON UPDATE current_timestamp(),
  PRIMARY KEY (`project`),
  UNIQUE KEY `sufw_booking_project_settings_feed_token` (`feed_token`),
  CONSTRAINT `sufw_booking_project_settings_project_check` CHECK (`project` IN ('perspektivwerk', 'produktionsschule'))
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS `sufw_booking_outbox` (
  `id` bigint unsigned NOT NULL AUTO_INCREMENT,
  `registration_id` char(36) NOT NULL,
  `kind` varchar(32) NOT NULL,
  `recipient_email` varchar(254) NOT NULL,
  `subject` varchar(255) NOT NULL,
  `body` text NOT NULL,
  `created_at` datetime NOT NULL DEFAULT current_timestamp(),
  `sent_at` datetime DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `sufw_booking_outbox_registration_kind` (`registration_id`, `kind`),
  KEY `sufw_booking_outbox_pending` (`sent_at`, `created_at`),
  CONSTRAINT `sufw_booking_outbox_kind_check` CHECK (`kind` IN ('confirmation_request', 'confirmation', 'reminder')),
  CONSTRAINT `sufw_booking_outbox_registration_fk` FOREIGN KEY (`registration_id`) REFERENCES `sufw_booking_registrations` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

INSERT IGNORE INTO `sufw_booking_project_settings` (`project`, `feed_token`)
VALUES
  ('perspektivwerk', SHA2(CONCAT(UUID(), RAND(), NOW(6)), 256)),
  ('produktionsschule', SHA2(CONCAT(UUID(), RAND(), NOW(6)), 256));

INSERT IGNORE INTO `sufw_booking_schema_migrations` (`version`) VALUES ('002_booking_workflow');