import "reflect-metadata"
import { DataSource } from "../../../src/data-source/DataSource"
import {
    closeTestingConnections,
    createTestingConnections,
    reloadTestingDatabases,
} from "../../utils/test-utils"
import { Post } from "./entity/Post"

describe("benchmark > bulk-sql-build", () => {
    let dataSources: DataSource[]
    before(async () => {
        dataSources = await createTestingConnections({
            __dirname,
        })
    })
    beforeEach(() => reloadTestingDatabases(dataSources))
    after(() => closeTestingConnections(dataSources))

    /**
     * Before optimization (<0.3.12) execution time for 10.000 sqls was ~1.8s
     * After optimization execution time for 10.000 sqls become ~0.380s
     */

    it("testing bulk create of 10.000 sql with joins", () =>
        Promise.all(
            dataSources.map(async (dataSource) => {
                for (let i = 0; i < 10_000; i++) {
                    dataSource
                        .getRepository(Post)
                        .createQueryBuilder("post")
                        .leftJoinAndSelect("post.categories", "categories1")
                        .leftJoinAndSelect("post.categories", "categories2")
                        .leftJoinAndSelect("post.categories", "categories3")
                        .leftJoinAndSelect("post.categories", "categories4")
                        .leftJoinAndSelect("post.categories", "categories5")
                        .leftJoinAndSelect("post.categories", "categories6")
                        .leftJoinAndSelect("post.categories", "categories7")
                        .where("post.id = 1")
                        .getQuery()
                }
            }),
        ))
})
