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

describe("query builder > relational query builder > load operation > many-to-one and one-to-one relations", () => {
    let connections: DataSource[]
    before(
        async () =>
            (connections = await createTestingConnections({
                entities: [__dirname + "/entity/*{.js,.ts}"],
            })),
    )
    beforeEach(() => reloadTestingDatabases(connections))
    after(() => closeTestingConnections(connections))

    it("should load relation entity of a given entity object", () =>
        Promise.all(
            connections.map(async (connection) => {
                const category1 = new Category()
                category1.name = "category #1"
                await connection.manager.save(category1)

                const category2 = new Category()
                category2.name = "category #2"
                await connection.manager.save(category2)

                const category3 = new Category()
                category3.name = "category #3"
                await connection.manager.save(category3)

                const post1 = new Post()
                post1.title = "post #1"
                post1.category = category3
                await connection.manager.save(post1)

                const post2 = new Post()
                post2.title = "post #2"
                post2.category = category2
                await connection.manager.save(post2)

                const post3 = new Post()
                post3.title = "post #3"
                post3.category = category1
                await connection.manager.save(post3)

                const loadedPost1 = await connection.manager.findOneBy(Post, {
                    id: 1,
                })
                const loadedCategory1 = await connection
                    .createQueryBuilder()
                    .relation(Post, "category")
                    .of(loadedPost1)
                    .loadOne()
                loadedPost1!.category = loadedCategory1!

                expect(loadedPost1!.category).to.be.eql({
                    id: 3,
                    name: "category #3",
                })

                const loadedPost2 = await connection.manager.findOneBy(Post, {
                    id: 2,
                })
                const loadedCategory2 = await connection
                    .createQueryBuilder()
                    .relation(Post, "category")
                    .of(loadedPost2)
                    .loadOne()
                loadedPost2!.category = loadedCategory2!

                expect(loadedPost2!.category).to.be.eql({
                    id: 2,
                    name: "category #2",
                })

                const loadedPost3 = await connection.manager.findOneBy(Post, {
                    id: 3,
                })
                const loadedCategory3 = await connection
                    .createQueryBuilder()
                    .relation(Post, "category")
                    .of(loadedPost3)
                    .loadOne()
                loadedPost3!.category = loadedCategory3!

                expect(loadedPost3!.category).to.be.eql({
                    id: 1,
                    name: "category #1",
                })
            }),
        ))

    it("should load relation entity of a given entity id", () =>
        Promise.all(
            connections.map(async (connection) => {
                const category1 = new Category()
                category1.name = "category #1"
                await connection.manager.save(category1)

                const category2 = new Category()
                category2.name = "category #2"
                await connection.manager.save(category2)

                const category3 = new Category()
                category3.name = "category #3"
                await connection.manager.save(category3)

                const post1 = new Post()
                post1.title = "post #1"
                post1.category = category3
                await connection.manager.save(post1)

                const post2 = new Post()
                post2.title = "post #2"
                post2.category = category2
                await connection.manager.save(post2)

                const post3 = new Post()
                post3.title = "post #3"
                post3.category = category1
                await connection.manager.save(post3)

                const loadedPost1 = await connection.manager.findOneBy(Post, {
                    id: 1,
                })
                const loadedCategory1 = await connection
                    .createQueryBuilder()
                    .relation(Post, "category")
                    .of({ id: 1 })
                    .loadOne()
                loadedPost1!.category = loadedCategory1!

                expect(loadedPost1!.category).to.be.eql({
                    id: 3,
                    name: "category #3",
                })

                const loadedPost2 = await connection.manager.findOneBy(Post, {
                    id: 2,
                })
                const loadedCategory2 = await connection
                    .createQueryBuilder()
                    .relation(Post, "category")
                    .of({ id: 2 })
                    .loadOne()
                loadedPost2!.category = loadedCategory2!

                expect(loadedPost2!.category).to.be.eql({
                    id: 2,
                    name: "category #2",
                })

                const loadedPost3 = await connection.manager.findOneBy(Post, {
                    id: 3,
                })
                const loadedCategory3 = await connection
                    .createQueryBuilder()
                    .relation(Post, "category")
                    .of({ id: 3 })
                    .loadOne()
                loadedPost3!.category = loadedCategory3!

                expect(loadedPost3!.category).to.be.eql({
                    id: 1,
                    name: "category #1",
                })
            }),
        ))

    it("should load relation entity of a given id", () =>
        Promise.all(
            connections.map(async (connection) => {
                const category1 = new Category()
                category1.name = "category #1"
                await connection.manager.save(category1)

                const category2 = new Category()
                category2.name = "category #2"
                await connection.manager.save(category2)

                const category3 = new Category()
                category3.name = "category #3"
                await connection.manager.save(category3)

                const post1 = new Post()
                post1.title = "post #1"
                post1.category = category3
                await connection.manager.save(post1)

                const post2 = new Post()
                post2.title = "post #2"
                post2.category = category2
                await connection.manager.save(post2)

                const post3 = new Post()
                post3.title = "post #3"
                post3.category = category1
                await connection.manager.save(post3)

                const loadedPost1 = await connection.manager.findOneBy(Post, {
                    id: 1,
                })
                const loadedCategory1 = await connection
                    .createQueryBuilder()
                    .relation(Post, "category")
                    .of(1)
                    .loadOne()
                loadedPost1!.category = loadedCategory1!

                expect(loadedPost1!.category).to.be.eql({
                    id: 3,
                    name: "category #3",
                })

                const loadedPost2 = await connection.manager.findOneBy(Post, {
                    id: 2,
                })
                const loadedCategory2 = await connection
                    .createQueryBuilder()
                    .relation(Post, "category")
                    .of(2)
                    .loadOne()
                loadedPost2!.category = loadedCategory2!

                expect(loadedPost2!.category).to.be.eql({
                    id: 2,
                    name: "category #2",
                })

                const loadedPost3 = await connection.manager.findOneBy(Post, {
                    id: 3,
                })
                const loadedCategory3 = await connection
                    .createQueryBuilder()
                    .relation(Post, "category")
                    .of(3)
                    .loadOne()
                loadedPost3!.category = loadedCategory3!

                expect(loadedPost3!.category).to.be.eql({
                    id: 1,
                    name: "category #1",
                })
            }),
        ))
})
