import { expect } from 'chai'
import * as ChildProcess from 'child_process'
import * as path from 'path'
import { emittedOnce } from './events-helpers'
import { BrowserView, BrowserWindow } from 'electron'
import { closeWindow } from './window-helpers';

describe('BrowserView module', () => {
  const fixtures = path.resolve(__dirname, '..', 'spec', 'fixtures')

  let w: BrowserWindow
  let view: BrowserView

  beforeEach(() => {
    w = new BrowserWindow({
      show: false,
      width: 400,
      height: 400,
      webPreferences: {
        backgroundThrottling: false
      }
    })
  })

  afterEach(async () => {
    await closeWindow(w)

    if (view) {
      view.destroy()
    }
  })

  describe('BrowserView.destroy()', () => {
    it('does not throw', () => {
      view = new BrowserView()
      view.destroy()
    })
  })

  describe('BrowserView.isDestroyed()', () => {
    it('returns correct value', () => {
      view = new BrowserView()
      expect(view.isDestroyed()).to.be.false('view is destroyed')
      view.destroy()
      expect(view.isDestroyed()).to.be.true('view is destroyed')
    })
  })

  describe('BrowserView.setBackgroundColor()', () => {
    it('does not throw for valid args', () => {
      view = new BrowserView()
      view.setBackgroundColor('#000')
    })

    it('throws for invalid args', () => {
      view = new BrowserView()
      expect(() => {
        view.setBackgroundColor(null as any)
      }).to.throw(/conversion failure/)
    })
  })

  describe('BrowserView.setAutoResize()', () => {
    it('does not throw for valid args', () => {
      view = new BrowserView()
      view.setAutoResize({})
      view.setAutoResize({ width: true, height: false })
    })

    it('throws for invalid args', () => {
      view = new BrowserView()
      expect(() => {
        view.setAutoResize(null as any)
      }).to.throw(/conversion failure/)
    })
  })

  describe('BrowserView.setBounds()', () => {
    it('does not throw for valid args', () => {
      view = new BrowserView()
      view.setBounds({ x: 0, y: 0, width: 1, height: 1 })
    })

    it('throws for invalid args', () => {
      view = new BrowserView()
      expect(() => {
        view.setBounds(null as any)
      }).to.throw(/conversion failure/)
      expect(() => {
        view.setBounds({} as any)
      }).to.throw(/conversion failure/)
    })
  })

  describe('BrowserView.getBounds()', () => {
    it('returns the current bounds', () => {
      view = new BrowserView()
      const bounds = { x: 10, y: 20, width: 30, height: 40 }
      view.setBounds(bounds)
      expect(view.getBounds()).to.deep.equal(bounds)
    })
  })

  describe('BrowserWindow.setBrowserView()', () => {
    it('does not throw for valid args', () => {
      view = new BrowserView()
      w.setBrowserView(view)
    })

    it('does not throw if called multiple times with same view', () => {
      view = new BrowserView()
      w.setBrowserView(view)
      w.setBrowserView(view)
      w.setBrowserView(view)
    })
  })

  describe('BrowserWindow.getBrowserView()', () => {
    it('returns the set view', () => {
      view = new BrowserView()
      w.setBrowserView(view)
      expect(view.id).to.not.be.null('view id')

      const view2 = w.getBrowserView()
      expect(view2!.webContents.id).to.equal(view.webContents.id)
    })

    it('returns null if none is set', () => {
      const view = w.getBrowserView()
      expect(view).to.be.null('view')
    })
  })

  describe('BrowserWindow.addBrowserView()', () => {
    it('does not throw for valid args', () => {
      const view1 = new BrowserView()
      w.addBrowserView(view1)
      const view2 = new BrowserView()
      w.addBrowserView(view2)
      view1.destroy()
      view2.destroy()
    })
    it('does not throw if called multiple times with same view', () => {
      view = new BrowserView()
      w.addBrowserView(view)
      w.addBrowserView(view)
      w.addBrowserView(view)
    })
  })

  describe('BrowserWindow.removeBrowserView()', () => {
    it('does not throw if called multiple times with same view', () => {
      view = new BrowserView()
      w.addBrowserView(view)
      w.removeBrowserView(view)
      w.removeBrowserView(view)
    })
  })

  describe('BrowserWindow.getBrowserViews()', () => {
    it('returns same views as was added', () => {
      const view1 = new BrowserView()
      w.addBrowserView(view1)
      const view2 = new BrowserView()
      w.addBrowserView(view2)

      expect(view1.id).to.be.not.null('view id')
      const views = w.getBrowserViews()
      expect(views).to.have.lengthOf(2)
      expect(views[0].webContents.id).to.equal(view1.webContents.id)
      expect(views[1].webContents.id).to.equal(view2.webContents.id)

      view1.destroy()
      view2.destroy()
    })
  })

  describe('BrowserView.webContents.getOwnerBrowserWindow()', () => {
    it('points to owning window', () => {
      view = new BrowserView()
      expect(view.webContents.getOwnerBrowserWindow()).to.be.null('owner browser window')

      w.setBrowserView(view)
      expect(view.webContents.getOwnerBrowserWindow()).to.equal(w)

      w.setBrowserView(null)
      expect(view.webContents.getOwnerBrowserWindow()).to.be.null('owner browser window')
    })
  })

  describe('BrowserView.fromId()', () => {
    it('returns the view with given id', () => {
      view = new BrowserView()
      w.setBrowserView(view)
      expect(view.id).to.not.be.null('view id')

      const view2 = BrowserView.fromId(view.id)
      expect(view2.webContents.id).to.equal(view.webContents.id)
    })
  })

  describe('BrowserView.fromWebContents()', () => {
    it('returns the view with given id', () => {
      view = new BrowserView()
      w.setBrowserView(view)
      expect(view.id).to.not.be.null('view id')

      const view2 = BrowserView.fromWebContents(view.webContents)
      expect(view2!.webContents.id).to.equal(view.webContents.id)
    })
  })

  describe('BrowserView.getAllViews()', () => {
    it('returns all views', () => {
      view = new BrowserView()
      w.setBrowserView(view)
      expect(view.id).to.not.be.null('view id')

      const views = BrowserView.getAllViews()
      expect(views).to.be.an('array').that.has.lengthOf(1)
      expect(views[0].webContents.id).to.equal(view.webContents.id)
    })
  })

  describe('new BrowserView()', () => {
    it('does not crash on exit', async () => {
      const appPath = path.join(fixtures, 'api', 'leak-exit-browserview.js')
      const electronPath = process.execPath
      const appProcess = ChildProcess.spawn(electronPath, [appPath])
      const [code] = await emittedOnce(appProcess, 'close')
      expect(code).to.equal(0)
    })
  })

  describe('window.open()', () => {
    it('works in BrowserView', (done) => {
      view = new BrowserView()
      w.setBrowserView(view)
      view.webContents.once('new-window', (e, url, frameName, disposition, options, additionalFeatures) => {
        e.preventDefault()
        expect(url).to.equal('http://host/')
        expect(frameName).to.equal('host')
        expect(additionalFeatures[0]).to.equal('this-is-not-a-standard-feature')
        done()
      })
      view.webContents.loadFile(path.join(fixtures, 'pages', 'window-open.html'))
    })
  })
})
