import 'reflect-metadata';
import { DataSource, Table } from '../../../src';
import {
	closeTestingConnections,
	createTestingConnections,
	reloadTestingDatabases,
} from '../../utils/test-utils';
import { TableExclusion } from '../../../src/schema-builder/table/TableExclusion';

describe('query runner > create exclusion constraint', () => {
	let connections: DataSource[];
	before(async () => {
		connections = await createTestingConnections({
			entities: [__dirname + '/entity/*{.js,.ts}'],
			enabledDrivers: ['postgres'], // Only PostgreSQL supports exclusion constraints.
			schemaCreate: true,
			dropSchema: true,
		});
	});
	beforeEach(() => reloadTestingDatabases(connections));
	after(() => closeTestingConnections(connections));

	it('should correctly create exclusion constraint and revert creation', () =>
		Promise.all(
			connections.map(async (connection) => {
				const queryRunner = connection.createQueryRunner();
				await queryRunner.createTable(
					new Table({
						name: 'question',
						columns: [
							{
								name: 'id',
								type: 'int',
								isPrimary: true,
							},
							{
								name: 'name',
								type: 'varchar',
							},
							{
								name: 'description',
								type: 'varchar',
							},
							{
								name: 'version',
								type: 'int',
							},
						],
					}),
					true,
				);

				// clear sqls in memory to avoid removing tables when down queries executed.
				queryRunner.clearSqlMemory();

				const driver = connection.driver;
				const exclusion1 = new TableExclusion({
					expression: `USING gist (${driver.escape('name')} WITH =)`,
				});
				const exclusion2 = new TableExclusion({
					expression: `USING gist (${driver.escape('id')} WITH =)`,
				});
				await queryRunner.createExclusionConstraints('question', [exclusion1, exclusion2]);

				let table = await queryRunner.getTable('question');
				table!.exclusions.length.should.be.equal(2);

				await queryRunner.executeMemoryDownSql();

				table = await queryRunner.getTable('question');
				table!.exclusions.length.should.be.equal(0);

				await queryRunner.release();
			}),
		));
});