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

describe("github issues > #47 wrong sql syntax when loading lazy relation", () => {
    let connections: DataSource[]
    before(
        async () =>
            (connections = await createTestingConnections({
                entities: [__dirname + "/entity/*{.js,.ts}"],
                enabledDrivers: ["mysql"], // we can properly test lazy-relations only on one platform
            })),
    )
    beforeEach(() => reloadTestingDatabases(connections))
    after(() => closeTestingConnections(connections))

    it("should persist successfully and return persisted entity", () =>
        Promise.all(
            connections.map(async (connection) => {
                // create objects to save
                const category1 = new Category()
                category1.name = "category #1"

                const post1 = new Post()
                post1.title = "Hello Post #1"
                post1.category = Promise.resolve(category1)
                expect(await post1.category).to.equal(category1)

                const category2 = new Category()
                category2.name = "category #2"

                const post2 = new Post()
                post2.title = "Hello Post #2"
                post2.category = Promise.resolve(category2)

                // persist
                await connection.manager.save(category1)
                await connection.manager.save(post1)
                await connection.manager.save(category2)
                await connection.manager.save(post2)

                // check that all persisted objects exist
                const loadedPost = await connection.manager
                    .createQueryBuilder(Post, "post")
                    .getMany()

                const loadedCategory1 = await loadedPost[0].category
                expect(loadedCategory1!).not.to.be.null
                loadedCategory1!.id.should.equal(1)
                loadedCategory1!.name.should.equal("category #1")

                const loadedCategory2 = await loadedPost[1].category
                expect(loadedCategory2!).not.to.be.null
                loadedCategory2!.id.should.equal(2)
                loadedCategory2!.name.should.equal("category #2")

                const loadedPosts1 = await loadedCategory1.posts
                expect(loadedPosts1!).not.to.be.undefined
                loadedPosts1![0].id.should.equal(1)
                loadedPosts1![0].title.should.equal("Hello Post #1")

                const loadedPosts2 = await loadedCategory2.posts
                expect(loadedPosts2!).not.to.be.undefined
                loadedPosts2![0].id.should.equal(2)
                loadedPosts2![0].title.should.equal("Hello Post #2")

                const reloadedPost = await connection.manager.findOneBy(Post, {
                    id: post1.id,
                })

                const promise = reloadedPost!.category
                reloadedPost!.category = Promise.resolve(category2)
                ;(await promise).id.should.equal(category1.id)
                ;(await reloadedPost!.category).id.should.equal(category2.id)
                // todo: need to test somehow how query is being generated, or how many raw data is returned
            }),
        ))
})
