import "reflect-metadata"
import {
    createTestingConnections,
    closeTestingConnections,
    reloadTestingDatabases,
} from "../../utils/test-utils"
import { DataSource } from "../../../src"
import { expect } from "chai"
import { Organization, Admin, User, OrganizationMembership } from "./entity"

describe("github issues > #7041 When requesting nested relations on foreign key primary entities, relation becomes empty entity rather than null", () => {
    let connections: DataSource[]
    before(
        async () =>
            (connections = await createTestingConnections({
                entities: [Organization, Admin, User, OrganizationMembership],
                schemaCreate: true,
                dropSchema: true,
            })),
    )
    beforeEach(() => reloadTestingDatabases(connections))
    after(() => closeTestingConnections(connections))

    it("should return null when requested nested relations are empty on OneToOne relation", () =>
        Promise.all(
            connections.map(async (connection) => {
                const userRepo = connection.getRepository(User)
                const testUser = new User()
                testUser.randomField = "foo"
                await userRepo.save(testUser)
                const foundUser = await userRepo.findOne({
                    where: {
                        id: testUser.id,
                    },
                    relations: { admin: { organization: true } },
                })
                expect(foundUser?.randomField).eq("foo")
                expect(foundUser?.admin).eq(null)
            }),
        ))

    it("should return [] when requested nested relations are empty on OneToMany relation", () =>
        Promise.all(
            connections.map(async (connection) => {
                const userRepo = connection.getRepository(User)
                const testUser = new User()
                testUser.randomField = "foo"
                await userRepo.save(testUser)
                const foundUser = await userRepo.findOne({
                    where: {
                        id: testUser.id,
                    },
                    relations: { membership: { organization: true } },
                })
                expect(foundUser?.randomField).eq("foo")
                expect(foundUser?.membership).eql([])
            }),
        ))
})