import { MigrationInterface, QueryRunner } from 'typeorm';

export class PhaseF221LongReferenceLabels1789754350000 implements MigrationInterface {
  name = 'PhaseF221LongReferenceLabels1789754350000';

  public async up(queryRunner: QueryRunner): Promise<void> {
    // La matriz APLICACION APP contiene denominaciones técnicas descriptivas que
    // legítimamente superan el límite histórico de 160 caracteres. No se recorta
    // información de la fuente: ampliamos sólo columnas descriptivas.
    await queryRunner.query(`ALTER TABLE asset_types ALTER COLUMN name TYPE varchar(500)`);
    await queryRunner.query(`ALTER TABLE asset_attribute_definitions ALTER COLUMN name TYPE varchar(500)`);
  }

  public async down(queryRunner: QueryRunner): Promise<void> {
    const rows = (await queryRunner.query(`
      SELECT
        coalesce(max(length(name)),0)::integer AS max_type_name,
        (SELECT coalesce(max(length(name)),0)::integer FROM asset_attribute_definitions) AS max_attribute_name
      FROM asset_types
    `)) as Array<{ max_type_name: number; max_attribute_name: number }>;

    if ((rows[0]?.max_type_name ?? 0) > 160 || (rows[0]?.max_attribute_name ?? 0) > 160) {
      throw new Error('F2.2.1 no puede reducir etiquetas a 160 caracteres sin pérdida de información');
    }
    await queryRunner.query(`ALTER TABLE asset_types ALTER COLUMN name TYPE varchar(160)`);
    await queryRunner.query(`ALTER TABLE asset_attribute_definitions ALTER COLUMN name TYPE varchar(160)`);
  }
}