import { MigrationInterface, QueryRunner } from 'typeorm';

/**
 * F5/F6 permits physical Inventory to belong to an Área without persisting a
 * Company snapshot. Company snapshots are optional creation/history metadata;
 * current ownership is resolved from area_company_relations.
 *
 * The F4 paired CHECK survived the trigger migration and contradicted that
 * model. Keep only the invariant that a Company snapshot cannot exist without
 * an Área.
 */
export class F61AreaOwnedOperationalContextCheck1790094500000 implements MigrationInterface {
  name='F61AreaOwnedOperationalContextCheck1790094500000';

  public async up(queryRunner:QueryRunner):Promise<void>{
    await queryRunner.query('ALTER TABLE assets DROP CONSTRAINT IF EXISTS chk_assets_operational_assignment_pair');
    await queryRunner.query(`
      ALTER TABLE assets
      ADD CONSTRAINT chk_assets_operational_assignment_pair
      CHECK (operator_company_id IS NULL OR operational_area_id IS NOT NULL)
    `);
  }

  public async down(queryRunner:QueryRunner):Promise<void>{
    await queryRunner.query('ALTER TABLE assets DROP CONSTRAINT IF EXISTS chk_assets_operational_assignment_pair');
    await queryRunner.query(`
      ALTER TABLE assets
      ADD CONSTRAINT chk_assets_operational_assignment_pair
      CHECK (
        (operational_area_id IS NULL AND operator_company_id IS NULL)
        OR (operational_area_id IS NOT NULL AND operator_company_id IS NOT NULL)
      )
    `);
  }
}