import { expect } from 'chai'
import * as path from 'path'
import * as fs from 'fs'
import { BrowserWindow } from 'electron'
import { ifdescribe, ifit } from './spec-helpers'
import { closeAllWindows } from './window-helpers'
import * as childProcess from 'child_process'

const Module = require('module')

const features = process.electronBinding('features')
const nativeModulesEnabled = !process.env.ELECTRON_SKIP_NATIVE_MODULE_TESTS

describe('modules support', () => {
  const fixtures = path.join(__dirname, 'fixtures')

  describe('third-party module', () => {
    ifdescribe(nativeModulesEnabled)('echo', () => {
      afterEach(closeAllWindows)
      it('can be required in renderer', async () => {
        const w = new BrowserWindow({ show: false, webPreferences: { nodeIntegration: true } })
        w.loadURL('about:blank')
        await expect(w.webContents.executeJavaScript(`{ require('echo'); null }`)).to.be.fulfilled()
      })

      ifit(features.isRunAsNodeEnabled())('can be required in node binary', function (done) {
        const child = childProcess.fork(path.join(fixtures, 'module', 'echo.js'))
        child.on('message', (msg) => {
          expect(msg).to.equal('ok')
          done()
        })
      })

      ifit(process.platform === 'win32')('can be required if electron.exe is renamed', () => {
        const testExecPath = path.join(path.dirname(process.execPath), 'test.exe')
        fs.copyFileSync(process.execPath, testExecPath)
        try {
          const fixture = path.join(fixtures, 'module', 'echo-renamed.js')
          expect(fs.existsSync(fixture)).to.be.true()
          const child = childProcess.spawnSync(testExecPath, [fixture])
          expect(child.status).to.equal(0)
        } finally {
          fs.unlinkSync(testExecPath)
        }
      })
    })

    describe('q', () => {
      describe('Q.when', () => {
        it('emits the fullfil callback', (done) => {
          const Q = require('q')
          Q(true).then((val: boolean) => {
            expect(val).to.be.true()
            done()
          })
        })
      })
    })

    describe('coffeescript', () => {
      it('can be registered and used to require .coffee files', () => {
        expect(() => {
          require('coffeescript').register()
        }).to.not.throw()
        expect(require('./fixtures/module/test.coffee')).to.be.true()
      })
    })
  })

  describe('global variables', () => {
    describe('process', () => {
      it('can be declared in a module', () => {
        expect(require('./fixtures/module/declare-process')).to.equal('declared process')
      })
    })

    describe('global', () => {
      it('can be declared in a module', () => {
        expect(require('./fixtures/module/declare-global')).to.equal('declared global')
      })
    })

    describe('Buffer', () => {
      it('can be declared in a module', () => {
        expect(require('./fixtures/module/declare-buffer')).to.equal('declared Buffer')
      })
    })
  })

  describe('Module._nodeModulePaths', () => {
    describe('when the path is inside the resources path', () => {
      it('does not include paths outside of the resources path', () => {
        let modulePath = process.resourcesPath
        expect(Module._nodeModulePaths(modulePath)).to.deep.equal([
          path.join(process.resourcesPath, 'node_modules')
        ])

        modulePath = process.resourcesPath + '-foo'
        const nodeModulePaths = Module._nodeModulePaths(modulePath)
        expect(nodeModulePaths).to.include(path.join(modulePath, 'node_modules'))
        expect(nodeModulePaths).to.include(path.join(modulePath, '..', 'node_modules'))

        modulePath = path.join(process.resourcesPath, 'foo')
        expect(Module._nodeModulePaths(modulePath)).to.deep.equal([
          path.join(process.resourcesPath, 'foo', 'node_modules'),
          path.join(process.resourcesPath, 'node_modules')
        ])

        modulePath = path.join(process.resourcesPath, 'node_modules', 'foo')
        expect(Module._nodeModulePaths(modulePath)).to.deep.equal([
          path.join(process.resourcesPath, 'node_modules', 'foo', 'node_modules'),
          path.join(process.resourcesPath, 'node_modules')
        ])

        modulePath = path.join(process.resourcesPath, 'node_modules', 'foo', 'bar')
        expect(Module._nodeModulePaths(modulePath)).to.deep.equal([
          path.join(process.resourcesPath, 'node_modules', 'foo', 'bar', 'node_modules'),
          path.join(process.resourcesPath, 'node_modules', 'foo', 'node_modules'),
          path.join(process.resourcesPath, 'node_modules')
        ])

        modulePath = path.join(process.resourcesPath, 'node_modules', 'foo', 'node_modules', 'bar')
        expect(Module._nodeModulePaths(modulePath)).to.deep.equal([
          path.join(process.resourcesPath, 'node_modules', 'foo', 'node_modules', 'bar', 'node_modules'),
          path.join(process.resourcesPath, 'node_modules', 'foo', 'node_modules'),
          path.join(process.resourcesPath, 'node_modules')
        ])
      })
    })

    describe('when the path is outside the resources path', () => {
      it('includes paths outside of the resources path', () => {
        const modulePath = path.resolve('/foo')
        expect(Module._nodeModulePaths(modulePath)).to.deep.equal([
          path.join(modulePath, 'node_modules'),
          path.resolve('/node_modules')
        ])
      })
    })
  })

  describe('require', () => {
    describe('when loaded URL is not file: protocol', () => {
      afterEach(closeAllWindows)
      it('searches for module under app directory', async () => {
        const w = new BrowserWindow({ show: false, webPreferences: { nodeIntegration: true } })
        w.loadURL('about:blank')
        const result = await w.webContents.executeJavaScript('typeof require("q").when')
        expect(result).to.equal('function')
      })
    })
  })
})
