import {MigrationInterface, QueryRunner} from "typeorm";
import { config } from '@config';

export class UniqueWorkflowNames1620821879465 implements MigrationInterface {
		name = 'UniqueWorkflowNames1620821879465';

		async up(queryRunner: QueryRunner): Promise<void> {
			const tablePrefix = config.get('database.tablePrefix');

			const workflowNames = await queryRunner.query(`
				SELECT name
				FROM "${tablePrefix}workflow_entity"
			`);

			for (const { name } of workflowNames) {
				const [duplicatesQuery, parameters] = queryRunner.connection.driver.escapeQueryWithParameters(`
					SELECT id, name
					FROM "${tablePrefix}workflow_entity"
					WHERE name = :name
					ORDER BY createdAt ASC
				`, { name }, {});

				const duplicates = await queryRunner.query(duplicatesQuery, parameters);

				if (duplicates.length > 1) {
					await Promise.all(duplicates.map(({ id, name }: { id: number; name: string; }, index: number) => {
						if (index === 0) return Promise.resolve();
						const [updateQuery, updateParams] = queryRunner.connection.driver.escapeQueryWithParameters(`
							UPDATE "${tablePrefix}workflow_entity"
							SET name = :name
							WHERE id = '${id}'
						`, { name: `${name} ${index + 1}`}, {});

						return queryRunner.query(updateQuery, updateParams);
					}));
				}
			}

			await queryRunner.query(`CREATE UNIQUE INDEX "IDX_${tablePrefix}943d8f922be094eb507cb9a7f9" ON "${tablePrefix}workflow_entity" ("name") `);
		}

		async down(queryRunner: QueryRunner): Promise<void> {
			const tablePrefix = config.get('database.tablePrefix');
			await queryRunner.query(`DROP INDEX "IDX_${tablePrefix}943d8f922be094eb507cb9a7f9"`);
		}

}