import { expect } from 'chai'
import * as path from 'path'
import * as http from 'http'
import { emittedNTimes, emittedOnce } from './events-helpers'
import { closeWindow } from './window-helpers'
import { app, BrowserWindow, ipcMain } from 'electron'
import { AddressInfo } from 'net'
import { ifdescribe } from './spec-helpers'

describe('renderer nodeIntegrationInSubFrames', () => {
  const generateTests = (description: string, webPreferences: any) => {
    describe(description, () => {
      const fixtureSuffix = webPreferences.webviewTag ? '-webview' : ''
      let w: BrowserWindow

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

      afterEach(async () => {
        await closeWindow(w)
        w = null as unknown as BrowserWindow
      })

      it('should load preload scripts in top level iframes', async () => {
        const detailsPromise = emittedNTimes(ipcMain, 'preload-ran', 2)
        w.loadFile(path.resolve(__dirname, `fixtures/sub-frames/frame-container${fixtureSuffix}.html`))
        const [event1, event2] = await detailsPromise
        expect(event1[0].frameId).to.not.equal(event2[0].frameId)
        expect(event1[0].frameId).to.equal(event1[2])
        expect(event2[0].frameId).to.equal(event2[2])
      })

      it('should load preload scripts in nested iframes', async () => {
        const detailsPromise = emittedNTimes(ipcMain, 'preload-ran', 3)
        w.loadFile(path.resolve(__dirname, `fixtures/sub-frames/frame-with-frame-container${fixtureSuffix}.html`))
        const [event1, event2, event3] = await detailsPromise
        expect(event1[0].frameId).to.not.equal(event2[0].frameId)
        expect(event1[0].frameId).to.not.equal(event3[0].frameId)
        expect(event2[0].frameId).to.not.equal(event3[0].frameId)
        expect(event1[0].frameId).to.equal(event1[2])
        expect(event2[0].frameId).to.equal(event2[2])
        expect(event3[0].frameId).to.equal(event3[2])
      })

      it('should correctly reply to the main frame with using event.reply', async () => {
        const detailsPromise = emittedNTimes(ipcMain, 'preload-ran', 2)
        w.loadFile(path.resolve(__dirname, `fixtures/sub-frames/frame-container${fixtureSuffix}.html`))
        const [event1] = await detailsPromise
        const pongPromise = emittedOnce(ipcMain, 'preload-pong')
        event1[0].reply('preload-ping')
        const details = await pongPromise
        expect(details[1]).to.equal(event1[0].frameId)
      })

      it('should correctly reply to the sub-frames with using event.reply', async () => {
        const detailsPromise = emittedNTimes(ipcMain, 'preload-ran', 2)
        w.loadFile(path.resolve(__dirname, `fixtures/sub-frames/frame-container${fixtureSuffix}.html`))
        const [, event2] = await detailsPromise
        const pongPromise = emittedOnce(ipcMain, 'preload-pong')
        event2[0].reply('preload-ping')
        const details = await pongPromise
        expect(details[1]).to.equal(event2[0].frameId)
      })

      it('should correctly reply to the nested sub-frames with using event.reply', async () => {
        const detailsPromise = emittedNTimes(ipcMain, 'preload-ran', 3)
        w.loadFile(path.resolve(__dirname, `fixtures/sub-frames/frame-with-frame-container${fixtureSuffix}.html`))
        const [, , event3] = await detailsPromise
        const pongPromise = emittedOnce(ipcMain, 'preload-pong')
        event3[0].reply('preload-ping')
        const details = await pongPromise
        expect(details[1]).to.equal(event3[0].frameId)
      })

      it('should not expose globals in main world', async () => {
        const detailsPromise = emittedNTimes(ipcMain, 'preload-ran', 2)
        w.loadFile(path.resolve(__dirname, `fixtures/sub-frames/frame-container${fixtureSuffix}.html`))
        const details = await detailsPromise
        const senders = details.map(event => event[0].sender)
        const isolatedGlobals = await Promise.all(senders.map(sender => sender.webContents.executeJavaScript('window.isolatedGlobal')))
        for (const result of isolatedGlobals) {
          if (webPreferences.contextIsolation) {
            expect(result).to.be.undefined()
          } else {
            expect(result).to.equal(true)
          }
        }
      })
    })
  }

  const generateConfigs = (webPreferences: any, ...permutations: {name: string, webPreferences: any}[]) => {
    const configs = [{ webPreferences, names: [] as string[] }]
    for (let i = 0; i < permutations.length; i++) {
      const length = configs.length
      for (let j = 0; j < length; j++) {
        const newConfig = Object.assign({}, configs[j])
        newConfig.webPreferences = Object.assign({},
          newConfig.webPreferences, permutations[i].webPreferences)
        newConfig.names = newConfig.names.slice(0)
        newConfig.names.push(permutations[i].name)
        configs.push(newConfig)
      }
    }

    return configs.map((config: any) => {
      if (config.names.length > 0) {
        config.title = `with ${config.names.join(', ')} on`
      } else {
        config.title = `without anything special turned on`
      }
      delete config.names

      return config as {title: string, webPreferences: any}
    })
  }

  generateConfigs(
    {
      preload: path.resolve(__dirname, 'fixtures/sub-frames/preload.js'),
      nodeIntegrationInSubFrames: true
    },
    {
      name: 'sandbox',
      webPreferences: { sandbox: true }
    },
    {
      name: 'context isolation',
      webPreferences: { contextIsolation: true }
    },
    {
      name: 'webview',
      webPreferences: { webviewTag: true, preload: false }
    }
  ).forEach(config => {
    generateTests(config.title, config.webPreferences)
  })

  describe('internal <iframe> inside of <webview>', () => {
    let w: BrowserWindow

    beforeEach(async () => {
      await closeWindow(w)
      w = new BrowserWindow({
        show: false,
        width: 400,
        height: 400,
        webPreferences: {
          preload: path.resolve(__dirname, 'fixtures/sub-frames/webview-iframe-preload.js'),
          nodeIntegrationInSubFrames: true,
          webviewTag: true
        }
      })
    })

    afterEach(async () => {
      await closeWindow(w)
      w = null as unknown as BrowserWindow
    })

    it('should not load preload scripts', async () => {
      const promisePass = emittedOnce(ipcMain, 'webview-loaded')
      const promiseFail = emittedOnce(ipcMain, 'preload-in-frame').then(() => {
        throw new Error('preload loaded in internal frame')
      })
      await w.loadURL('about:blank')
      return Promise.race([promisePass, promiseFail])
    })
  })
})

// app.getAppMetrics() does not return sandbox information on Linux.
ifdescribe(process.platform !== 'linux')('cross-site frame sandboxing', () => {
  let server: http.Server
  let crossSiteUrl: string
  let serverUrl: string

  before(function (done) {
    server = http.createServer((req, res) => {
      res.end(`<iframe name="frame" src="${crossSiteUrl}" />`)
    })
    server.listen(0, '127.0.0.1', () => {
      serverUrl = `http://127.0.0.1:${(server.address() as AddressInfo).port}/`
      crossSiteUrl = `http://localhost:${(server.address() as AddressInfo).port}/`
      done()
    })
  })

  after(() => {
    server.close()
    server = null as unknown as http.Server
  })

  let w: BrowserWindow

  afterEach(async () => {
    await closeWindow(w)
    w = null as unknown as BrowserWindow
  })

  const generateSpecs = (description: string, webPreferences: any) => {
    describe(description, () => {
      it('iframe process is sandboxed if possible', async () => {
        w = new BrowserWindow({
          show: false,
          webPreferences
        })

        await w.loadURL(serverUrl)

        const pidMain = w.webContents.getOSProcessId()
        const pidFrame = (w.webContents as any)._getOSProcessIdForFrame('frame', crossSiteUrl)

        const metrics = app.getAppMetrics()
        const isProcessSandboxed = function (pid: number) {
          const entry = metrics.filter(metric => metric.pid === pid)[0]
          return entry && entry.sandboxed
        }

        const sandboxMain = !!(webPreferences.sandbox || process.mas)
        const sandboxFrame = sandboxMain || !webPreferences.nodeIntegrationInSubFrames

        expect(isProcessSandboxed(pidMain)).to.equal(sandboxMain)
        expect(isProcessSandboxed(pidFrame)).to.equal(sandboxFrame)
      })
    })
  }

  generateSpecs('nodeIntegrationInSubFrames = false, sandbox = false', {
    nodeIntegrationInSubFrames: false,
    sandbox: false
  })

  generateSpecs('nodeIntegrationInSubFrames = false, sandbox = true', {
    nodeIntegrationInSubFrames: false,
    sandbox: true
  })

  generateSpecs('nodeIntegrationInSubFrames = true, sandbox = false', {
    nodeIntegrationInSubFrames: true,
    sandbox: false
  })

  generateSpecs('nodeIntegrationInSubFrames = true, sandbox = true', {
    nodeIntegrationInSubFrames: true,
    sandbox: true
  })
})