// tested class
import { PeertubeListenerRss } from "../";

// Unit test
import path from "path";

import events from "events";

import nock from "nock";
import * as chai from "chai";
import sinon from "ts-sinon";
import sinonChai from "sinon-chai";

chai.use(sinonChai);
const expect = chai.expect;

// default value (more easy when it's aliases)
const defaultChannelID = "3";
const defaultInstanceAdress = "video.monsieurbidouille.fr";
const defaultTimeloop = 15;
const defaultHistory = [
  "https://video.monsieurbidouille.fr/videos/watch/5ffe5a3a-8377-472d-9c04-d4ed130d6775",
];

// expected value during my test
const expectedChannelAddress = `https://${defaultInstanceAdress}/feeds/videos.xml?videoChannelId=${defaultChannelID}`;
const expectedCustomFields = {
  "media:group": ["media:group"],
};

const expectedElmts = require("./RessourcesTest/expectedElmts.json");
const expectedFirstElmt = expectedElmts[0];
const expectedLastElmt = {}; //expectedElmts[1];

// let's test
describe("test ytbListener_RSS class", function () {
  describe("test constructor", function () {
    it("construct with 3 params", function () {
      // given
      const listener = new PeertubeListenerRss(
        defaultInstanceAdress,
        defaultChannelID,
        defaultTimeloop, // 15 sec
        defaultHistory
      );

      // assertions
      expect(listener.address).to.be.eql(expectedChannelAddress);
      expect(listener.timeloop).to.be.eql(defaultTimeloop);
      expect(listener.customfields).to.be.eql(expectedCustomFields);
      expect(listener.lastEntriesLinks).to.be.eql(defaultHistory);
    });

    it("construct with 2 params (without history)", function () {
      // given
      const listener = new PeertubeListenerRss(
        defaultInstanceAdress,
        defaultChannelID,
        defaultTimeloop // 15 sec
      );

      // assertions
      expect(listener.address).to.be.eql(expectedChannelAddress);
      expect(listener.timeloop).to.be.eql(defaultTimeloop);
      expect(listener.customfields).to.be.eql(expectedCustomFields);
    });

    it("construct with 1 params (without history and timeloop)", function () {
      // given
      const listener = new PeertubeListenerRss(
        defaultInstanceAdress,
        defaultChannelID
      );

      // assertions
      expect(listener.address).to.be.eql(expectedChannelAddress);
      expect(listener.timeloop).to.be.eql(5 * 60);
      expect(listener.customfields).to.be.eql(expectedCustomFields);
    });
  });

  describe.only("integration test", function () {
    beforeEach(function () {
      nock.disableNetConnect();
    });

    afterEach(function () {
      nock.cleanAll();
    });

    it.only("fetches", async function () {
      // given
      nock(`https://${defaultInstanceAdress}`)
        .get(`/feeds/videos.xml?videoChannelId=${defaultChannelID}`)
        .replyWithFile(
          200,
          path.join(__dirname, "RessourcesTest/peertube_feed.rss"),
          {
            "content-type": "application/rss+xml",
            charset: "UTF-8",
          }
        );

      const listener = new PeertubeListenerRss(
        defaultInstanceAdress,
        defaultChannelID,
        defaultTimeloop
      );

      //when
      const res = await listener.fetchRSS();

      // assertion

      // console.log(JSON.stringify(res.items[0]));

      expect(res.items[0]).to.be.eql(expectedFirstElmt);
      //expect(res.items[res.items.length - 1]).to.be.eql(expectedLastElmt);
    });

    /**
     * This test will test the usage of the librairie with, in the order
     *  - 1 fetch of the original document (here trigger update and new_entries events)
     *  - 1 fetch with the original document and a new entry (here trigger update and new_entries events)
     *  - 1 fetch of the previous document (here trigger update events)
     */
    it("fetches with start loop in 3 times", async function () {
      // given
      const clock = sinon.useFakeTimers();

      nock(`https://${defaultInstanceAdress}`)
        .get(`/feeds/videos.xml?videoChannelId=${defaultChannelID}`)
        .replyWithFile(
          200,
          path.join(__dirname, "RessourcesTest/peertube_feed.rss"),
          {
            "content-type": "application/rss+xml",
            charset: "UTF-8",
          }
        );

      const listener = new PeertubeListenerRss(
        defaultInstanceAdress,
        defaultChannelID,
        defaultTimeloop
      );

      // spy
      const updateListenerSpy = sinon.spy();
      const newEntriesListenerSpy = sinon.spy();

      // start timer
      listener.on("update", updateListenerSpy);
      listener.on("newEntries", newEntriesListenerSpy);

      listener.start();

      // when
      await events.once(listener, "update");

      // assertion
      expect(updateListenerSpy).to.have.been.calledOnce;
      expect(updateListenerSpy.firstCall.args[0])
        .to.have.property("items")
        .that.deep.include.members([expectedFirstElmt, expectedLastElmt]);
      expect(newEntriesListenerSpy).to.have.been.called;
      expect(
        newEntriesListenerSpy.firstCall.args[0]
      ).that.deep.include.members([expectedFirstElmt, expectedLastElmt]);
      expect(updateListenerSpy.firstCall.args[0].items.length).to.be.eql(
        newEntriesListenerSpy.firstCall.args[0].length
      );

      // todo update the rss feed
      // Fake RSS entry to simulate an update
      const newEntry = expectedElmts[2];

      nock(`https://${defaultInstanceAdress}`)
        .get(`/feeds/videos.xml?videoChannelId=${defaultChannelID}`)
        .replyWithFile(
          200,
          path.join(__dirname, "RessourcesTest/peertube_feed_new_entries.rss"),
          {
            "content-type": "application/rss+xml",
            charset: "UTF-8",
          }
        );

      // when
      await clock.tickAsync(15000);
      await events.once(listener, "update");

      // assertion
      expect(updateListenerSpy).to.have.been.calledTwice;
      expect(updateListenerSpy.secondCall.args[0])
        .to.have.property("items")
        .that.deep.include.members([
          expectedFirstElmt,
          expectedLastElmt,
          newEntry,
        ]);
      expect(newEntriesListenerSpy).to.have.been.calledTwice;
      expect(updateListenerSpy.secondCall.args[0])
        .to.have.property("items")
        .that.deep.include.members([newEntry]);

      // when
      nock(`https://${defaultInstanceAdress}`)
        .get(`/feeds/videos.xml?videoChannelId=${defaultChannelID}`)
        .replyWithFile(
          200,
          path.join(__dirname, "RessourcesTest/peertube_feed_new_entries.rss"),
          {
            "content-type": "application/rss+xml",
            charset: "UTF-8",
          }
        );

      await clock.tickAsync(15000);
      await events.once(listener, "update");

      // assertion
      expect(updateListenerSpy).to.have.been.calledThrice;
      expect(updateListenerSpy.secondCall.args[0])
        .to.have.property("items")
        .that.deep.include.members([
          expectedFirstElmt,
          expectedLastElmt,
          newEntry,
        ]);
      expect(newEntriesListenerSpy).to.not.have.been.calledThrice;

      // then
      listener.stop();
    });

    /**
     * This test will test the usage of the librairie with, in the order
     *  - 1 fetch of the original document (here trigger update and new_entries events)
     *  - 1 fetch with the original document and a new entry (here trigger update and new_entries events)
     *  - 1 fetch of the previous document (here trigger update events)
     */
    it("fetches with start loop in 3 times and history is initialize", async function () {
      // given
      const clock = sinon.useFakeTimers();

      nock(`https://${defaultInstanceAdress}`)
        .get(`/feeds/videos.xml?videoChannelId=${defaultChannelID}`)
        .replyWithFile(
          200,
          path.join(__dirname, "RessourcesTest/peertube_feed.rss"),
          {
            "content-type": "application/rss+xml",
            charset: "UTF-8",
          }
        );

      const listener = new PeertubeListenerRss(
        defaultInstanceAdress,
        defaultChannelID,
        defaultTimeloop,
        defaultHistory
      );

      // spy
      const updateListenerSpy = sinon.spy();
      const newEntriesListenerSpy = sinon.spy();

      // start timer
      listener.on("update", updateListenerSpy);
      listener.on("newEntries", newEntriesListenerSpy);

      listener.start();

      // when
      await events.once(listener, "update");

      // assertion
      expect(updateListenerSpy).to.have.been.calledOnce;
      expect(updateListenerSpy.firstCall.args[0])
        .to.have.property("items")
        .that.deep.include.members([expectedFirstElmt, expectedLastElmt]);
      expect(newEntriesListenerSpy).to.have.been.called;
      expect(newEntriesListenerSpy.firstCall.args[0])
        .that.deep.include.members([expectedLastElmt])
        .and.that.not.deep.include.members([expectedFirstElmt]);
      expect(updateListenerSpy.firstCall.args[0].items.length).to.be.eql(
        newEntriesListenerSpy.firstCall.args[0].length + 1
      );

      // todo update the rss feed
      // Fake RSS entry to simulate an update
      const newEntry = expectedElmts[2];

      nock(`https://${defaultInstanceAdress}`)
        .get(`/feeds/videos.xml?videoChannelId=${defaultChannelID}`)
        .replyWithFile(
          200,
          path.join(__dirname, "RessourcesTest/peertube_feed_new_entries.rss"),
          {
            "content-type": "application/rss+xml",
            charset: "UTF-8",
          }
        );

      // when
      await clock.tickAsync(15000);
      await events.once(listener, "update");

      // assertion
      expect(updateListenerSpy).to.have.been.calledTwice;
      expect(updateListenerSpy.secondCall.args[0])
        .to.have.property("items")
        .that.deep.include.members([
          expectedFirstElmt,
          expectedLastElmt,
          newEntry,
        ]);
      expect(newEntriesListenerSpy).to.have.been.calledTwice;
      expect(updateListenerSpy.secondCall.args[0])
        .to.have.property("items")
        .that.deep.include.members([newEntry]);

      // when
      nock(`https://${defaultInstanceAdress}`)
        .get(`/feeds/videos.xml?videoChannelId=${defaultChannelID}`)
        .replyWithFile(
          200,
          path.join(__dirname, "RessourcesTest/peertube_feed_new_entries.rss"),
          {
            "content-type": "application/rss+xml",
            charset: "UTF-8",
          }
        );

      await clock.tickAsync(15000);
      await events.once(listener, "update");

      // assertion
      expect(updateListenerSpy).to.have.been.calledThrice;
      expect(updateListenerSpy.secondCall.args[0])
        .to.have.property("items")
        .that.deep.include.members([
          expectedFirstElmt,
          expectedLastElmt,
          newEntry,
        ]);
      expect(newEntriesListenerSpy).to.not.have.been.calledThrice;

      // then
      listener.stop();
    });
  });
});