const {shell} = require('electron')
const {it, fit, ffit, fffit, beforeEach, afterEach} = require('./helpers/async-spec-helpers') // eslint-disable-line no-unused-vars
const main = require('../lib/main')
const AboutView = require('../lib/components/about-view')
const UpdateView = require('../lib/components/update-view')
const MockUpdater = require('./mocks/updater')

describe('UpdateView', () => {
  let aboutElement
  let updateManager
  let workspaceElement
  let scheduler

  beforeEach(async () => {
    let storage = {}

    spyOn(window.localStorage, 'setItem').andCallFake((key, value) => {
      storage[key] = value
    })
    spyOn(window.localStorage, 'getItem').andCallFake((key) => {
      return storage[key]
    })

    workspaceElement = atom.views.getView(atom.workspace)
    await atom.packages.activatePackage('about')
    spyOn(atom.autoUpdater, 'getState').andReturn('idle')
    spyOn(atom.autoUpdater, 'checkForUpdate')
    spyOn(atom.autoUpdater, 'platformSupportsUpdates').andReturn(true)
  })

  describe('when the About page is open', () => {
    beforeEach(async () => {
      jasmine.attachToDOM(workspaceElement)
      await atom.workspace.open('atom://about')
      aboutElement = workspaceElement.querySelector('.about')
      updateManager = main.model.state.updateManager
      scheduler = AboutView.getScheduler()
    })

    describe('when the updates are not supported by the platform', () => {
      beforeEach(async () => {
        atom.autoUpdater.platformSupportsUpdates.andReturn(false)
        updateManager.resetState()
        await scheduler.getNextUpdatePromise()
      })

      it('hides the auto update UI and shows the update instructions link', async () => {
        expect(aboutElement.querySelector('.about-update-action-button')).not.toBeVisible()
        expect(aboutElement.querySelector('.about-auto-updates')).not.toBeVisible()
      })

      it('opens the update instructions page when the instructions link is clicked', async () => {
        spyOn(shell, 'openExternal')
        let link = aboutElement.querySelector('.app-unsupported .about-updates-instructions')
        link.click()

        let args = shell.openExternal.mostRecentCall.args
        expect(shell.openExternal).toHaveBeenCalled()
        expect(args[0]).toContain('installing-atom')
      })
    })

    describe('when updates are supported by the platform', () => {
      beforeEach(async () => {
        atom.autoUpdater.platformSupportsUpdates.andReturn(true)
        updateManager.resetState()
        await scheduler.getNextUpdatePromise()
      })

      it('shows the auto update UI', () => {
        expect(aboutElement.querySelector('.about-updates')).toBeVisible()
      })

      it('shows the correct panels when the app checks for updates and there is no update available', async () => {
        expect(aboutElement.querySelector('.about-default-update-message')).toBeVisible()

        MockUpdater.checkForUpdate()
        await scheduler.getNextUpdatePromise()
        expect(aboutElement.querySelector('.app-up-to-date')).not.toBeVisible()
        expect(aboutElement.querySelector('.app-checking-for-updates')).toBeVisible()

        MockUpdater.updateNotAvailable()
        await scheduler.getNextUpdatePromise()
        expect(aboutElement.querySelector('.app-up-to-date')).toBeVisible()
        expect(aboutElement.querySelector('.app-checking-for-updates')).not.toBeVisible()
      })

      it('shows the correct panels when the app checks for updates and encounters an error', async () => {
        expect(aboutElement.querySelector('.about-default-update-message')).toBeVisible()

        MockUpdater.checkForUpdate()
        await scheduler.getNextUpdatePromise()
        expect(aboutElement.querySelector('.app-up-to-date')).not.toBeVisible()
        expect(aboutElement.querySelector('.app-checking-for-updates')).toBeVisible()

        spyOn(atom.autoUpdater, 'getErrorMessage').andReturn('an error message')
        MockUpdater.updateError()
        await scheduler.getNextUpdatePromise()
        expect(aboutElement.querySelector('.app-update-error')).toBeVisible()
        expect(aboutElement.querySelector('.app-error-message').textContent).toBe('an error message')
        expect(aboutElement.querySelector('.app-checking-for-updates')).not.toBeVisible()
        expect(aboutElement.querySelector('.about-update-action-button').disabled).toBe(false)
        expect(aboutElement.querySelector('.about-update-action-button').textContent).toBe('Check now')
      })

      it('shows the correct panels and button states when the app checks for updates and an update is downloaded', async () => {
        expect(aboutElement.querySelector('.about-default-update-message')).toBeVisible()
        expect(aboutElement.querySelector('.about-update-action-button').disabled).toBe(false)
        expect(aboutElement.querySelector('.about-update-action-button').textContent).toBe('Check now')

        MockUpdater.checkForUpdate()
        await scheduler.getNextUpdatePromise()

        expect(aboutElement.querySelector('.app-up-to-date')).not.toBeVisible()
        expect(aboutElement.querySelector('.app-checking-for-updates')).toBeVisible()
        expect(aboutElement.querySelector('.about-update-action-button').disabled).toBe(true)
        expect(aboutElement.querySelector('.about-update-action-button').textContent).toBe('Check now')

        MockUpdater.downloadUpdate()
        await scheduler.getNextUpdatePromise()
        expect(aboutElement.querySelector('.app-checking-for-updates')).not.toBeVisible()
        expect(aboutElement.querySelector('.app-downloading-update')).toBeVisible()
        // TODO: at some point it would be nice to be able to cancel an update download, and then this would be a cancel button
        expect(aboutElement.querySelector('.about-update-action-button').disabled).toBe(true)
        expect(aboutElement.querySelector('.about-update-action-button').textContent).toBe('Check now')

        MockUpdater.finishDownloadingUpdate('42.0.0')
        await scheduler.getNextUpdatePromise()
        expect(aboutElement.querySelector('.app-downloading-update')).not.toBeVisible()
        expect(aboutElement.querySelector('.app-update-available-to-install')).toBeVisible()

        expect(aboutElement.querySelector('.app-update-available-to-install .about-updates-version').textContent).toBe('42.0.0')
        expect(aboutElement.querySelector('.about-update-action-button').disabled).toBe(false)
        expect(aboutElement.querySelector('.about-update-action-button').textContent).toBe('Restart and install')
      })

      it('opens the release notes for the downloaded release when the release notes link are clicked', async () => {
        MockUpdater.finishDownloadingUpdate('1.2.3')
        await scheduler.getNextUpdatePromise()

        spyOn(shell, 'openExternal')
        let link = aboutElement.querySelector('.app-update-available-to-install .about-updates-release-notes')
        link.click()

        let args = shell.openExternal.mostRecentCall.args
        expect(shell.openExternal).toHaveBeenCalled()
        expect(args[0]).toContain('/v1.2.3')
      })

      it('executes checkForUpdate() when the check for update button is clicked', () => {
        let button = aboutElement.querySelector('.about-update-action-button')
        button.click()
        expect(atom.autoUpdater.checkForUpdate).toHaveBeenCalled()
      })

      it('executes restartAndInstallUpdate() when the restart and install button is clicked', async () => {
        spyOn(atom.autoUpdater, 'restartAndInstallUpdate')
        MockUpdater.finishDownloadingUpdate('42.0.0')
        await scheduler.getNextUpdatePromise()

        let button = aboutElement.querySelector('.about-update-action-button')
        button.click()
        expect(atom.autoUpdater.restartAndInstallUpdate).toHaveBeenCalled()
      })

      it("starts in the same state as atom's AutoUpdateManager", async () => {
        atom.autoUpdater.getState.andReturn('downloading')
        updateManager.resetState()

        await scheduler.getNextUpdatePromise()
        expect(aboutElement.querySelector('.app-checking-for-updates')).not.toBeVisible()
        expect(aboutElement.querySelector('.app-downloading-update')).toBeVisible()
        expect(aboutElement.querySelector('.about-update-action-button').disabled).toBe(true)
        expect(aboutElement.querySelector('.about-update-action-button').textContent).toBe('Check now')
      })

      describe('when core.automaticallyUpdate is toggled', () => {
        beforeEach(async () => {
          expect(atom.config.get('core.automaticallyUpdate')).toBe(true)
          atom.autoUpdater.checkForUpdate.reset()
        })

        it('shows the auto update UI', async () => {
          expect(aboutElement.querySelector('.about-auto-updates input').checked).toBe(true)
          expect(aboutElement.querySelector('.about-default-update-message')).toBeVisible()
          expect(aboutElement.querySelector('.about-default-update-message').textContent).toBe('Atom will check for updates automatically')

          atom.config.set('core.automaticallyUpdate', false)
          await scheduler.getNextUpdatePromise()

          expect(aboutElement.querySelector('.about-auto-updates input').checked).toBe(false)
          expect(aboutElement.querySelector('.about-default-update-message')).toBeVisible()
          expect(aboutElement.querySelector('.about-default-update-message').textContent).toBe('Automatic updates are disabled please check manually')
        })

        it('updates config and the UI when the checkbox is used to toggle', async () => {
          expect(aboutElement.querySelector('.about-auto-updates input').checked).toBe(true)

          aboutElement.querySelector('.about-auto-updates input').click()
          await scheduler.getNextUpdatePromise()

          expect(atom.config.get('core.automaticallyUpdate')).toBe(false)
          expect(aboutElement.querySelector('.about-auto-updates input').checked).toBe(false)
          expect(aboutElement.querySelector('.about-default-update-message')).toBeVisible()
          expect(aboutElement.querySelector('.about-default-update-message').textContent).toBe('Automatic updates are disabled please check manually')

          aboutElement.querySelector('.about-auto-updates input').click()
          await scheduler.getNextUpdatePromise()

          expect(atom.config.get('core.automaticallyUpdate')).toBe(true)
          expect(aboutElement.querySelector('.about-auto-updates input').checked).toBe(true)
          expect(aboutElement.querySelector('.about-default-update-message')).toBeVisible()
          expect(aboutElement.querySelector('.about-default-update-message').textContent).toBe('Atom will check for updates automatically')
        })

        describe('checking for updates', function () {
          afterEach(() => {
            this.updateView = null
          })

          it('checks for update when the about page is shown', () => {
            expect(atom.autoUpdater.checkForUpdate).not.toHaveBeenCalled()

            this.updateView = new UpdateView({
              updateManager: updateManager,
              availableVersion: '9999.0.0',
              viewUpdateReleaseNotes: () => {}
            })

            expect(atom.autoUpdater.checkForUpdate).toHaveBeenCalled()
          })

          it('does not check for update when the about page is shown and the update manager is not in the idle state', () => {
            atom.autoUpdater.getState.andReturn('downloading')
            updateManager.resetState()
            expect(atom.autoUpdater.checkForUpdate).not.toHaveBeenCalled()

            this.updateView = new UpdateView({
              updateManager: updateManager,
              availableVersion: '9999.0.0',
              viewUpdateReleaseNotes: () => {}
            })

            expect(atom.autoUpdater.checkForUpdate).not.toHaveBeenCalled()
          })

          it('does not check for update when the about page is shown and auto updates are turned off', () => {
            atom.config.set('core.automaticallyUpdate', false)
            expect(atom.autoUpdater.checkForUpdate).not.toHaveBeenCalled()

            this.updateView = new UpdateView({
              updateManager: updateManager,
              availableVersion: '9999.0.0',
              viewUpdateReleaseNotes: () => {}
            })

            expect(atom.autoUpdater.checkForUpdate).not.toHaveBeenCalled()
          })
        })
      })
    })
  })

  describe('when the About page is not open and an update is downloaded', () => {
    it('should display the new version when it is opened', async () => {
      MockUpdater.finishDownloadingUpdate('42.0.0')

      jasmine.attachToDOM(workspaceElement)
      await atom.workspace.open('atom://about')
      aboutElement = workspaceElement.querySelector('.about')
      updateManager = main.model.state.updateManager
      scheduler = AboutView.getScheduler()

      expect(aboutElement.querySelector('.app-update-available-to-install')).toBeVisible()
      expect(aboutElement.querySelector('.app-update-available-to-install .about-updates-version').textContent).toBe('42.0.0')
      expect(aboutElement.querySelector('.about-update-action-button').disabled).toBe(false)
      expect(aboutElement.querySelector('.about-update-action-button').textContent).toBe('Restart and install')
    })
  })
})