-- Order files table + migrate LabelUrl into systemLabel, then drop legacy columns.
-- Run on MySQL. Backup first.

CREATE TABLE IF NOT EXISTS `t_order_file` (
  `Id` INT NOT NULL AUTO_INCREMENT,
  `OrderId` INT NOT NULL COMMENT 'Order Id',
  `FileType` VARCHAR(32) NOT NULL COMMENT 'tradeProof/systemLabel/downstreamLabel/lastMileLabel/infraredImage',
  `FileName` VARCHAR(255) NULL COMMENT 'Original file name',
  `FileUrl` VARCHAR(512) NOT NULL COMMENT 'Relative or absolute URL',
  `ContentType` VARCHAR(128) NULL,
  `FileSize` BIGINT NULL,
  `Sort` INT NOT NULL DEFAULT 0,
  `Source` VARCHAR(32) NOT NULL DEFAULT 'upload' COMMENT 'upload/systemGenerate/downstream/migrate',
  `Remark` VARCHAR(512) NULL,
  `IsDeleted` TINYINT NOT NULL DEFAULT 0,
  `ConcurrencyStamp` CHAR(36) NOT NULL DEFAULT (UUID()),
  `CreateUserId` INT NOT NULL DEFAULT 0,
  `CreateTime` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `UpdateUserId` INT NULL,
  `UpdateTime` DATETIME NULL,
  PRIMARY KEY (`Id`),
  KEY `idx_ord_file_order_type` (`OrderId`, `FileType`, `IsDeleted`)
) COMMENT='Order attachment files';

-- Migrate existing system label URL (ignore if column already dropped)
INSERT INTO `t_order_file` (`OrderId`, `FileType`, `FileName`, `FileUrl`, `ContentType`, `Sort`, `Source`, `CreateUserId`, `CreateTime`)
SELECT
  `Id`,
  'systemLabel',
  SUBSTRING_INDEX(`LabelUrl`, '/', -1),
  `LabelUrl`,
  'application/pdf',
  0,
  'migrate',
  0,
  NOW()
FROM `t_order`
WHERE `LabelUrl` IS NOT NULL
  AND TRIM(`LabelUrl`) <> ''
  AND NOT EXISTS (
    SELECT 1 FROM `t_order_file` f
    WHERE f.`OrderId` = `t_order`.`Id`
      AND f.`FileType` = 'systemLabel'
      AND f.`IsDeleted` = 0
  );

ALTER TABLE `t_order`
  DROP COLUMN `LabelUrl`,
  DROP COLUMN `LabelGenerateStatus`,
  DROP COLUMN `LabelGenerateError`;