const chai = require('chai');
const chaiHttp = require('chai-http');
const express = require('express');
const models = require('../../../models');
import { SetupApp } from '../../../app';
import { expect } from 'chai';
import * as helpers from './helpers';

async function init() {
    chai.use(chaiHttp);
    const app = express();
    SetupApp(app);
    await models.sequelize.sync({ force: true });
    return app;
}

describe('POST /song with no title', () => {
    it('should fail', done => {
        init().then((app) => {
            chai
                .request(app)
                .post('/song')
                .send({})
                .then((res) => {
                    expect(res).to.have.status(400);
                    done();
                });
        })
    });
});

describe('POST /song with only a title', () => {
    it('should return the first available id', done => {
        init().then(async(app) => {
            chai
                .request(app)
                .post('/song')
                .send({
                    title: "MySong"
                })
                .then((res) => {
                    expect(res).to.have.status(200);
                    expect(res.body).to.deep.equal({
                        id: 1
                    });
                    done();
                });
        })
    });
});

describe('POST /song with a nonexistent artist Id', () => {
    it('should fail', done => {
        init().then(async (app) => {
            chai
                .request(app)
                .post('/song')
                .send({
                    title: "MySong",
                    artistIds: [1]
                })
                .then((res) => {
                    expect(res).to.have.status(400);
                    done();
                });
        })
    });
});

describe('POST /song with an existing artist Id', () => {
    it('should succeed', done => {
        init().then((app) => {
            var req = chai.request(app).keepOpen();
            helpers.createArtist(req, { name: "MyArtist" }, 200, { id: 1 })
                .then(() => helpers.createSong(req, { title: "MySong", artistIds: [ 1 ] }, 200, { id: 1 }) )
                .then(req.close)
                .then(done);
        });
    });
});

describe('POST /song with two existing artist Ids', () => {
    it('should succeed', done => {
        init().then((app) => {
            var req = chai.request(app).keepOpen();
            helpers.createArtist(req, { name: "Artist1" }, 200, { id: 1 })
                .then(() => helpers.createArtist(req, { name: "Artist2" }, 200, { id: 2 }) )
                .then(() => helpers.createSong(req, { title: "MySong", artistIds: [1, 2] }, 200, { id: 1 }) )
                .then(req.close)
                .then(done);
        });
    });
});

describe('POST /song with an existent and a nonexistent artist Id', () => {
    it('should fail', done => {
        init().then((app) => {
            var req = chai.request(app).keepOpen();
            helpers.createArtist(req, { name: "Artist1" }, 200, { id: 1 })
                .then(() => helpers.createSong(req, { title: "MySong", artistIds: [1, 2] }, 400) )
                .then(req.close)
                .then(done);
        });
    });
});


describe('POST /song/query with no songs', () => {
    it('should give empty list', done => {
        init().then((app) => {
            chai
                .request(app)
                .post('/song/query')
                .send({
                    'query': {}
                })
                .then((res) => {
                    expect(res).to.have.status(200);
                    expect(res.body).to.deep.equal({
                        ids: []
                    });
                    done();
                });
        })
    });
});

describe('POST /song/query with several songs and filters', () => {
    it('should give all correct results', done => {
        init().then((app) => {
            async function checkAllSongs(req) {
                await req
                    .post('/song/query')
                    .send({ "query": {} })
                    .then((res) => {
                        expect(res).to.have.status(200);
                        expect(res.body).to.deep.equal({
                            ids: [1, 2, 3]
                        });
                    });
            }

            async function checkIdIn(req) {
                await req
                    .post('/song/query')
                    .send({
                        "query": {
                            "prop": "id",
                            "propOperator": "IN",
                            "propOperand": [1, 3, 5]
                        }
                    })
                    .then((res) => {
                        expect(res).to.have.status(200);
                        expect(res.body).to.deep.equal({
                            ids: [1, 3]
                        });
                    });
            }

            async function checkIdNotIn(req) {
                await req
                    .post('/song/query')
                    .send({
                        "query": {
                            "prop": "id",
                            "propOperator": "NOTIN",
                            "propOperand": [1, 3, 5]
                        }
                    })
                    .then((res) => {
                        expect(res).to.have.status(200);
                        expect(res.body).to.deep.equal({
                            ids: [2]
                        });
                    });
            }

            async function checkArtistIdIn(req) {
                await req
                    .post('/song/query')
                    .send({
                        "query": {
                            "prop": "artistIds",
                            "propOperator": "IN",
                            "propOperand": [1]
                        }
                    })
                    .then((res) => {
                        expect(res).to.have.status(200);
                        expect(res.body).to.deep.equal({
                            ids: [1, 2]
                        });
                    });
            }

            async function checkOrRelation(req) {
                await req
                    .post('/song/query')
                    .send({
                        "query": {
                            "childrenOperator": "OR",
                            "children": [
                                {
                                    "prop": "artistIds",
                                    "propOperator": "IN",
                                    "propOperand": [2]
                                },
                                {
                                    "prop": "id",
                                    "propOperator": "EQ",
                                    "propOperand": 1
                                }
                            ]
                        }
                    })
                    .then((res) => {
                        expect(res).to.have.status(200);
                        expect(res.body).to.deep.equal({
                            ids: [1, 3]
                        });
                    });
            }

            var req = chai.request(app).keepOpen();

            helpers.createArtist(req, { name: "Artist1" }, 200)
                .then(() => helpers.createArtist(req, { name: "Artist2" }, 200))
                .then(() => helpers.createSong(req, { title: "Song1", artistIds: [1] }, 200))
                .then(() => helpers.createSong(req, { title: "Song2", artistIds: [1] }, 200))
                .then(() => helpers.createSong(req, { title: "Song3", artistIds: [2] }, 200))
                .then(() => checkAllSongs(req))
                .then(() => checkIdIn(req))
                .then(() => checkIdNotIn(req))
                .then(() => checkArtistIdIn(req))
                .then(() => checkOrRelation(req))
                .then(req.close)
                .then(done)
        })
    });
});