CREATE TABLE IF NOT EXISTS customers (
  id                  VARCHAR(36)  NOT NULL PRIMARY KEY,
  email               VARCHAR(255) NOT NULL UNIQUE,
  password_hash       VARCHAR(255) NOT NULL,
  full_name           VARCHAR(255) NOT NULL,
  is_verified         TINYINT(1)   NOT NULL DEFAULT 0,
  verify_token        VARCHAR(128) NULL,
  reset_token         VARCHAR(128) NULL,
  reset_token_expires DATETIME     NULL,
  stripe_customer_id  VARCHAR(100) NULL UNIQUE,
  created_at          DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at          DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  INDEX idx_email           (email),
  INDEX idx_stripe_customer (stripe_customer_id)
);

CREATE TABLE IF NOT EXISTS subscriptions (
  id                     VARCHAR(36)  NOT NULL PRIMARY KEY,
  customer_id            VARCHAR(36)  NOT NULL,
  license_id             VARCHAR(36)  NOT NULL,
  stripe_subscription_id VARCHAR(100) NOT NULL UNIQUE,
  stripe_price_id        VARCHAR(100) NOT NULL,
  plan_key               VARCHAR(20)  NOT NULL DEFAULT 'free',
  billing_interval       VARCHAR(10)  NOT NULL DEFAULT 'monthly',
  status                 VARCHAR(20)  NOT NULL DEFAULT 'active',
  server_ip              VARCHAR(45)  NOT NULL,
  current_period_start   DATETIME     NOT NULL,
  current_period_end     DATETIME     NOT NULL,
  cancel_at_period_end   TINYINT(1)   NOT NULL DEFAULT 0,
  canceled_at            DATETIME     NULL,
  created_at             DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at             DATETIME     NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  FOREIGN KEY (customer_id) REFERENCES customers(id) ON DELETE CASCADE,
  INDEX idx_customer_id (customer_id),
  INDEX idx_license_id  (license_id),
  INDEX idx_stripe_sub  (stripe_subscription_id),
  INDEX idx_server_ip   (server_ip)
);

CREATE TABLE IF NOT EXISTS ip_change_requests (
  id              VARCHAR(36) NOT NULL PRIMARY KEY,
  customer_id     VARCHAR(36) NOT NULL,
  subscription_id VARCHAR(36) NOT NULL,
  old_ip          VARCHAR(45) NOT NULL,
  new_ip          VARCHAR(45) NOT NULL,
  status          VARCHAR(10) NOT NULL DEFAULT 'pending',
  requested_at    DATETIME    NOT NULL DEFAULT CURRENT_TIMESTAMP,
  processed_at    DATETIME    NULL,
  FOREIGN KEY (customer_id)     REFERENCES customers(id)     ON DELETE CASCADE,
  FOREIGN KEY (subscription_id) REFERENCES subscriptions(id) ON DELETE CASCADE,
  INDEX idx_customer_id (customer_id)
);