SET @schema_name = DATABASE();

SET @sql = (
  SELECT IF(
    EXISTS (
      SELECT 1
      FROM INFORMATION_SCHEMA.COLUMNS
      WHERE TABLE_SCHEMA = @schema_name
        AND TABLE_NAME = 'users'
        AND COLUMN_NAME = 'email_verified_at'
    ),
    'SELECT 1',
    'ALTER TABLE users ADD COLUMN email_verified_at DATETIME NULL AFTER status'
  )
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

SET @sql = (
  SELECT IF(
    EXISTS (
      SELECT 1
      FROM INFORMATION_SCHEMA.COLUMNS
      WHERE TABLE_SCHEMA = @schema_name
        AND TABLE_NAME = 'users'
        AND COLUMN_NAME = 'mfa_enabled'
    ),
    'SELECT 1',
    'ALTER TABLE users ADD COLUMN mfa_enabled TINYINT(1) NOT NULL DEFAULT 0 AFTER email_verified_at'
  )
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

SET @sql = (
  SELECT IF(
    EXISTS (
      SELECT 1
      FROM INFORMATION_SCHEMA.COLUMNS
      WHERE TABLE_SCHEMA = @schema_name
        AND TABLE_NAME = 'users'
        AND COLUMN_NAME = 'disabled_at'
    ),
    'SELECT 1',
    'ALTER TABLE users ADD COLUMN disabled_at DATETIME NULL AFTER mfa_enabled'
  )
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

SET @sql = (
  SELECT IF(
    EXISTS (
      SELECT 1
      FROM INFORMATION_SCHEMA.STATISTICS
      WHERE TABLE_SCHEMA = @schema_name
        AND TABLE_NAME = 'participants'
        AND INDEX_NAME = 'uq_participants_tenant_user'
    ),
    'SELECT 1',
    'ALTER TABLE participants ADD UNIQUE KEY uq_participants_tenant_user (tenant_id, user_id)'
  )
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;

SET @sql = (
  SELECT IF(
    EXISTS (
      SELECT 1
      FROM INFORMATION_SCHEMA.STATISTICS
      WHERE TABLE_SCHEMA = @schema_name
        AND TABLE_NAME = 'participants'
        AND INDEX_NAME = 'idx_participants_tenant_paypal_name'
    ),
    'SELECT 1',
    'ALTER TABLE participants ADD KEY idx_participants_tenant_paypal_name (tenant_id, paypal_name)'
  )
);
PREPARE stmt FROM @sql;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;