-- Purge legacy single-remote storage columns from installs where they are still present.
--
-- Background: 02.52.25.sql originally used `DROP COLUMN IF EXISTS`, which is a
-- MariaDB-only extension and errors on Oracle MySQL 8.x. On MySQL 8 installs the
-- migration failed but Joomla still recorded the schema as applied, leaving all 26
-- legacy remote_storage/ftp_*/sftp_*/gdrive_*/s3_* columns stranded on the profiles
-- table. This migration removes them portably.
--
-- It must be safe on BOTH engines AND on installs where the columns are already gone
-- (MariaDB, or anyone who ran the corrected 02.52.25). Plain `DROP COLUMN` errors when
-- a column is absent, and `DROP COLUMN IF EXISTS` errors on MySQL 8 — so neither works
-- unconditionally. We gate the drop on INFORMATION_SCHEMA and build the ALTER via a
-- prepared statement, which runs on MySQL 8 and MariaDB alike. All 26 columns were
-- created and dropped together, so the presence of `remote_storage` gates the whole set.
-- When the columns are absent this is a no-op (`DO 0`).

SET @moko_has_legacy_remote := (
    SELECT COUNT(*)
    FROM INFORMATION_SCHEMA.COLUMNS
    WHERE TABLE_SCHEMA = DATABASE()
      AND TABLE_NAME = '#__mokosuitebackup_profiles'
      AND COLUMN_NAME = 'remote_storage'
);

SET @moko_drop_legacy_remote := IF(@moko_has_legacy_remote > 0,
    'ALTER TABLE `#__mokosuitebackup_profiles` DROP COLUMN `remote_storage`, DROP COLUMN `ftp_host`, DROP COLUMN `ftp_port`, DROP COLUMN `ftp_username`, DROP COLUMN `ftp_password`, DROP COLUMN `ftp_path`, DROP COLUMN `ftp_passive`, DROP COLUMN `ftp_ssl`, DROP COLUMN `sftp_host`, DROP COLUMN `sftp_port`, DROP COLUMN `sftp_username`, DROP COLUMN `sftp_auth_type`, DROP COLUMN `sftp_password`, DROP COLUMN `sftp_key_data`, DROP COLUMN `sftp_passphrase`, DROP COLUMN `sftp_path`, DROP COLUMN `gdrive_client_id`, DROP COLUMN `gdrive_client_secret`, DROP COLUMN `gdrive_refresh_token`, DROP COLUMN `gdrive_folder_id`, DROP COLUMN `s3_endpoint`, DROP COLUMN `s3_region`, DROP COLUMN `s3_access_key`, DROP COLUMN `s3_secret_key`, DROP COLUMN `s3_bucket`, DROP COLUMN `s3_path`',
    'DO 0'
);

PREPARE moko_stmt FROM @moko_drop_legacy_remote;
EXECUTE moko_stmt;
DEALLOCATE PREPARE moko_stmt;