-- 联盟返佣系统：规范化数据模型
-- 替换原先手写的 affiliate_stats / affiliate_clicks 裸表，改用 ORM 管理

CREATE TABLE IF NOT EXISTS `affiliate_programs` (
  `id` INT NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(191) NOT NULL,
  `slug` VARCHAR(191) NOT NULL,
  `provider` VARCHAR(191),
  `description` TEXT,
  `commission_rate` VARCHAR(191),
  `cookie_days` INT,
  `homepage_url` VARCHAR(191),
  `logo` VARCHAR(191),
  `active` TINYINT(1) NOT NULL DEFAULT 1,
  `sort_order` INT NOT NULL DEFAULT 0,
  `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  `updated_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY (`id`),
  UNIQUE INDEX `affiliate_programs_slug_key` (`slug`)
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS `affiliate_links` (
  `id` INT NOT NULL AUTO_INCREMENT,
  `program_id` INT NOT NULL,
  `title` VARCHAR(191) NOT NULL,
  `description` TEXT,
  `url` TEXT NOT NULL,
  `thumbnail` VARCHAR(191),
  `tool_id` INT,
  `skill_id` VARCHAR(191),
  `tags` TEXT,
  `estimated_commission` DOUBLE NOT NULL DEFAULT 0,
  `sort_order` INT NOT NULL DEFAULT 0,
  `is_featured` TINYINT(1) NOT NULL DEFAULT 0,
  `active` TINYINT(1) NOT NULL DEFAULT 1,
  `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  `updated_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3),
  PRIMARY KEY (`id`),
  INDEX `affiliate_links_program_id_idx` (`program_id`),
  INDEX `affiliate_links_tool_id_idx` (`tool_id`),
  INDEX `affiliate_links_skill_id_idx` (`skill_id`),
  CONSTRAINT `affiliate_links_program_id_fkey` FOREIGN KEY (`program_id`) REFERENCES `affiliate_programs` (`id`) ON DELETE CASCADE,
  CONSTRAINT `affiliate_links_tool_id_fkey` FOREIGN KEY (`tool_id`) REFERENCES `tools` (`id`) ON DELETE SET NULL,
  CONSTRAINT `affiliate_links_skill_id_fkey` FOREIGN KEY (`skill_id`) REFERENCES `skills` (`id`) ON DELETE SET NULL
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS `affiliate_clicks` (
  `id` INT NOT NULL AUTO_INCREMENT,
  `link_id` INT NOT NULL,
  `user_id` INT,
  `ip` VARCHAR(191),
  `user_agent` TEXT,
  `ref` VARCHAR(191),
  `created_at` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  PRIMARY KEY (`id`),
  INDEX `affiliate_clicks_link_id_idx` (`link_id`),
  CONSTRAINT `affiliate_clicks_link_id_fkey` FOREIGN KEY (`link_id`) REFERENCES `affiliate_links` (`id`) ON DELETE CASCADE
) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

-- 清理旧的手写裸表（被本迁移的规范化模型取代）
DROP TABLE IF EXISTS `affiliate_stats`;
DROP TABLE IF EXISTS `affiliate_clicks_old`;