const path = require('path')
const fs = require('fs-plus')
const temp = require('temp').track()
const CommandInstaller = require('../src/command-installer')

describe('CommandInstaller on #darwin', () => {
  let installer, resourcesPath, installationPath, atomBinPath, apmBinPath

  beforeEach(() => {
    installationPath = temp.mkdirSync('atom-bin')

    resourcesPath = temp.mkdirSync('atom-app')
    atomBinPath = path.join(resourcesPath, 'app', 'atom.sh')
    apmBinPath = path.join(resourcesPath, 'app', 'apm', 'node_modules', '.bin', 'apm')
    fs.writeFileSync(atomBinPath, '')
    fs.writeFileSync(apmBinPath, '')
    fs.chmodSync(atomBinPath, '755')
    fs.chmodSync(apmBinPath, '755')

    spyOn(CommandInstaller.prototype, 'getResourcesDirectory').andReturn(resourcesPath)
    spyOn(CommandInstaller.prototype, 'getInstallDirectory').andReturn(installationPath)
  })

  afterEach(() => {
    try {
      temp.cleanupSync()
    } catch (error) {}
  })

  it('shows an error dialog when installing commands interactively fails', () => {
    const appDelegate = jasmine.createSpyObj('appDelegate', ['confirm'])
    installer = new CommandInstaller(appDelegate)
    installer.initialize('2.0.2')
    spyOn(installer, 'installAtomCommand').andCallFake((__, callback) => callback(new Error('an error')))

    installer.installShellCommandsInteractively()

    expect(appDelegate.confirm).toHaveBeenCalledWith({
      message: 'Failed to install shell commands',
      detailedMessage: 'an error'
    })

    appDelegate.confirm.reset()
    installer.installAtomCommand.andCallFake((__, callback) => callback())
    spyOn(installer, 'installApmCommand').andCallFake((__, callback) => callback(new Error('another error')))

    installer.installShellCommandsInteractively()

    expect(appDelegate.confirm).toHaveBeenCalledWith({
      message: 'Failed to install shell commands',
      detailedMessage: 'another error'
    })
  })

  it('shows a success dialog when installing commands interactively succeeds', () => {
    const appDelegate = jasmine.createSpyObj('appDelegate', ['confirm'])
    installer = new CommandInstaller(appDelegate)
    installer.initialize('2.0.2')
    spyOn(installer, 'installAtomCommand').andCallFake((__, callback) => callback())
    spyOn(installer, 'installApmCommand').andCallFake((__, callback) => callback())

    installer.installShellCommandsInteractively()

    expect(appDelegate.confirm).toHaveBeenCalledWith({
      message: 'Commands installed.',
      detailedMessage: 'The shell commands `atom` and `apm` are installed.'
    })
  })

  describe('when using a stable version of atom', () => {
    beforeEach(() => {
      installer = new CommandInstaller()
      installer.initialize('2.0.2')
    })

    it("symlinks the atom command as 'atom'", () => {
      const installedAtomPath = path.join(installationPath, 'atom')
      expect(fs.isFileSync(installedAtomPath)).toBeFalsy()

      waitsFor(done => {
        installer.installAtomCommand(false, error => {
          expect(error).toBeNull()
          expect(fs.realpathSync(installedAtomPath)).toBe(fs.realpathSync(atomBinPath))
          expect(fs.isExecutableSync(installedAtomPath)).toBe(true)
          expect(fs.isFileSync(path.join(installationPath, 'atom-beta'))).toBe(false)
          done()
        })
      })
    })

    it("symlinks the apm command as 'apm'", () => {
      const installedApmPath = path.join(installationPath, 'apm')
      expect(fs.isFileSync(installedApmPath)).toBeFalsy()

      waitsFor(done => {
        installer.installApmCommand(false, error => {
          expect(error).toBeNull()
          expect(fs.realpathSync(installedApmPath)).toBe(fs.realpathSync(apmBinPath))
          expect(fs.isExecutableSync(installedApmPath)).toBeTruthy()
          expect(fs.isFileSync(path.join(installationPath, 'apm-beta'))).toBe(false)
          done()
        })
      })
    })
  })

  describe('when using a beta version of atom', () => {
    beforeEach(() => {
      installer = new CommandInstaller()
      installer.initialize('2.2.0-beta.0')
    })

    it("symlinks the atom command as 'atom-beta'", () => {
      const installedAtomPath = path.join(installationPath, 'atom-beta')
      expect(fs.isFileSync(installedAtomPath)).toBeFalsy()

      waitsFor(done => {
        installer.installAtomCommand(false, error => {
          expect(error).toBeNull()
          expect(fs.realpathSync(installedAtomPath)).toBe(fs.realpathSync(atomBinPath))
          expect(fs.isExecutableSync(installedAtomPath)).toBe(true)
          expect(fs.isFileSync(path.join(installationPath, 'atom'))).toBe(false)
          done()
        })
      })
    })

    it("symlinks the apm command as 'apm-beta'", () => {
      const installedApmPath = path.join(installationPath, 'apm-beta')
      expect(fs.isFileSync(installedApmPath)).toBeFalsy()

      waitsFor(done => {
        installer.installApmCommand(false, error => {
          expect(error).toBeNull()
          expect(fs.realpathSync(installedApmPath)).toBe(fs.realpathSync(apmBinPath))
          expect(fs.isExecutableSync(installedApmPath)).toBeTruthy()
          expect(fs.isFileSync(path.join(installationPath, 'apm'))).toBe(false)
          done()
        })
      })
    })
  })
})
