const chai = require('chai');
const dirtyChai = require('dirty-chai');

const fs = require('fs');
const path = require('path');
const os = require('os');
const http = require('http');
const { shell, remote } = require('electron');
const { BrowserWindow } = remote;

const { closeWindow } = require('./window-helpers');
const { emittedOnce } = require('./events-helpers');

const { expect } = chai;
chai.use(dirtyChai);

describe('shell module', () => {
  const fixtures = path.resolve(__dirname, 'fixtures');
  const shortcutOptions = {
    target: 'C:\\target',
    description: 'description',
    cwd: 'cwd',
    args: 'args',
    appUserModelId: 'appUserModelId',
    icon: 'icon',
    iconIndex: 1
  };

  describe('shell.openExternal()', () => {
    let envVars = {};
    let w;

    beforeEach(function () {
      envVars = {
        display: process.env.DISPLAY,
        de: process.env.DE,
        browser: process.env.BROWSER
      };
    });

    afterEach(async () => {
      await closeWindow(w);
      w = null;
      // reset env vars to prevent side effects
      if (process.platform === 'linux') {
        process.env.DE = envVars.de;
        process.env.BROWSER = envVars.browser;
        process.env.DISPLAY = envVars.display;
      }
    });

    it('opens an external link', async () => {
      let url = 'http://127.0.0.1';
      let requestReceived;
      if (process.platform === 'linux') {
        process.env.BROWSER = '/bin/true';
        process.env.DE = 'generic';
        process.env.DISPLAY = '';
        requestReceived = Promise.resolve();
      } else if (process.platform === 'darwin') {
        // On the Mac CI machines, Safari tries to ask for a password to the
        // code signing keychain we set up to test code signing (see
        // https://github.com/electron/electron/pull/19969#issuecomment-526278890),
        // so use a blur event as a crude proxy.
        w = new BrowserWindow({ show: true });
        requestReceived = emittedOnce(w, 'blur');
      } else {
        const server = http.createServer((req, res) => {
          res.end();
        });
        await new Promise(resolve => server.listen(0, '127.0.0.1', resolve));
        requestReceived = new Promise(resolve => server.on('connection', () => resolve()));
        url = `http://127.0.0.1:${server.address().port}`;
      }

      await Promise.all([
        shell.openExternal(url),
        requestReceived
      ]);
    });
  });

  describe('shell.readShortcutLink(shortcutPath)', () => {
    beforeEach(function () {
      if (process.platform !== 'win32') this.skip();
    });

    it('throws when failed', () => {
      expect(() => {
        shell.readShortcutLink('not-exist');
      }).to.throw('Failed to read shortcut link');
    });

    it('reads all properties of a shortcut', () => {
      const shortcut = shell.readShortcutLink(path.join(fixtures, 'assets', 'shortcut.lnk'));
      expect(shortcut).to.deep.equal(shortcutOptions);
    });
  });

  describe('shell.writeShortcutLink(shortcutPath[, operation], options)', () => {
    beforeEach(function () {
      if (process.platform !== 'win32') this.skip();
    });

    const tmpShortcut = path.join(os.tmpdir(), `${Date.now()}.lnk`);

    afterEach(() => {
      fs.unlinkSync(tmpShortcut);
    });

    it('writes the shortcut', () => {
      expect(shell.writeShortcutLink(tmpShortcut, { target: 'C:\\' })).to.be.true();
      expect(fs.existsSync(tmpShortcut)).to.be.true();
    });

    it('correctly sets the fields', () => {
      expect(shell.writeShortcutLink(tmpShortcut, shortcutOptions)).to.be.true();
      expect(shell.readShortcutLink(tmpShortcut)).to.deep.equal(shortcutOptions);
    });

    it('updates the shortcut', () => {
      expect(shell.writeShortcutLink(tmpShortcut, 'update', shortcutOptions)).to.be.false();
      expect(shell.writeShortcutLink(tmpShortcut, 'create', shortcutOptions)).to.be.true();
      expect(shell.readShortcutLink(tmpShortcut)).to.deep.equal(shortcutOptions);
      const change = { target: 'D:\\' };
      expect(shell.writeShortcutLink(tmpShortcut, 'update', change)).to.be.true();
      expect(shell.readShortcutLink(tmpShortcut)).to.deep.equal(Object.assign(shortcutOptions, change));
    });

    it('replaces the shortcut', () => {
      expect(shell.writeShortcutLink(tmpShortcut, 'replace', shortcutOptions)).to.be.false();
      expect(shell.writeShortcutLink(tmpShortcut, 'create', shortcutOptions)).to.be.true();
      expect(shell.readShortcutLink(tmpShortcut)).to.deep.equal(shortcutOptions);
      const change = {
        target: 'D:\\',
        description: 'description2',
        cwd: 'cwd2',
        args: 'args2',
        appUserModelId: 'appUserModelId2',
        icon: 'icon2',
        iconIndex: 2
      };
      expect(shell.writeShortcutLink(tmpShortcut, 'replace', change)).to.be.true();
      expect(shell.readShortcutLink(tmpShortcut)).to.deep.equal(change);
    });
  });
});