CREATE TABLE IF NOT EXISTS membership_plans (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  code VARCHAR(30) NOT NULL,
  name VARCHAR(50) NOT NULL,
  level TINYINT UNSIGNED NOT NULL,
  duration_days INT UNSIGNED NOT NULL,
  price_cent INT UNSIGNED NOT NULL,
  original_price_cent INT UNSIGNED NOT NULL,
  status TINYINT UNSIGNED 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 KEY uk_plan_code (code)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS benefit_definitions (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  benefit_key VARCHAR(50) NOT NULL,
  name VARCHAR(100) NOT NULL,
  value_type VARCHAR(20) NOT NULL,
  description VARCHAR(255) NOT NULL DEFAULT '',
  PRIMARY KEY (id),
  UNIQUE KEY uk_benefit_key (benefit_key)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS plan_benefits (
  plan_id BIGINT UNSIGNED NOT NULL,
  benefit_id BIGINT UNSIGNED NOT NULL,
  benefit_value VARCHAR(255) NOT NULL,
  PRIMARY KEY (plan_id, benefit_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS subscriptions (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  user_id BIGINT UNSIGNED NOT NULL,
  plan_id BIGINT UNSIGNED NOT NULL,
  source VARCHAR(30) NOT NULL,
  status TINYINT UNSIGNED NOT NULL DEFAULT 1,
  started_at DATETIME(3) NOT NULL,
  expires_at DATETIME(3) NOT NULL,
  auto_renew TINYINT(1) 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),
  KEY idx_sub_user_expire (user_id, expires_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS user_entitlements (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  user_id BIGINT UNSIGNED NOT NULL,
  benefit_key VARCHAR(50) NOT NULL,
  benefit_value VARCHAR(255) NOT NULL,
  source_type VARCHAR(30) NOT NULL,
  source_id BIGINT UNSIGNED NOT NULL,
  started_at DATETIME(3) NOT NULL,
  expires_at DATETIME(3) NOT NULL,
  created_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
  PRIMARY KEY (id),
  KEY idx_entitlement_user_key (user_id, benefit_key, expires_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

CREATE TABLE IF NOT EXISTS orders (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  order_no VARCHAR(40) NOT NULL,
  user_id BIGINT UNSIGNED NOT NULL,
  product_type VARCHAR(30) NOT NULL,
  product_id BIGINT UNSIGNED NOT NULL,
  amount_cent INT UNSIGNED NOT NULL,
  currency CHAR(3) NOT NULL DEFAULT 'CNY',
  status VARCHAR(20) NOT NULL DEFAULT 'CREATED',
  channel VARCHAR(30) NOT NULL DEFAULT '',
  paid_at DATETIME(3) NULL,
  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 KEY uk_order_no (order_no),
  KEY idx_order_user_created (user_id, created_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;