import consola from 'consola'
import fsExtra from 'fs-extra'
import htmlMinifier from 'html-minifier-terser'

import Generator from '../src/generator'
import { createNuxt, hookCalls } from './__utils__'

jest.mock('fs-extra')
jest.mock('html-minifier-terser')
jest.mock('@nuxt/utils')

describe('generator: generate route', () => {
  beforeEach(() => {
    jest.clearAllMocks()
  })

  test('should generate route', async () => {
    const nuxt = createNuxt()
    nuxt.options.build.html = { minify: false }
    nuxt.options.generate.minify = undefined
    nuxt.options.generate.subFolders = false
    const generator = new Generator(nuxt)

    const route = '/foo/'
    const payload = {}
    const errors = []

    const returned = await generator.generateRoute({ route, payload, errors })

    expect(nuxt.server.renderRoute).toBeCalledTimes(1)
    expect(nuxt.server.renderRoute).toBeCalledWith('/foo', { payload })

    const genernatePageHookCall = hookCalls(nuxt, 'generate:page')[0][0]
    expect(genernatePageHookCall).toMatchObject({
      route: '/foo',
      html: 'rendered html'
    })
    expect(genernatePageHookCall.path).toBePath(
      '/var/nuxt/generate/foo.html',
      'C:\\nuxt\\generate\\foo.html'
    )

    const genernateRouteCreatedHookCall = hookCalls(nuxt, 'generate:routeCreated')[0][0]
    expect(genernateRouteCreatedHookCall).toMatchObject({
      route: '/foo',
      errors: []
    })
    expect(genernateRouteCreatedHookCall.path).toBePath(
      '/var/nuxt/generate/foo.html',
      'C:\\nuxt\\generate\\foo.html'
    )

    expect(fsExtra.mkdirp).toBeCalledTimes(1)
    expect(fsExtra.mkdirp.mock.calls[0][0]).toBePath(
      '/var/nuxt/generate',
      'C:\\nuxt\\generate'
    )
    expect(fsExtra.writeFile).toBeCalledTimes(1)
    expect(fsExtra.writeFile).toBeCalledWith(expect.any(String), 'rendered html', 'utf8')
    expect(fsExtra.writeFile.mock.calls[0][0]).toBePath(
      '/var/nuxt/generate/foo.html',
      'C:\\nuxt\\generate\\foo.html'
    )
    expect(returned).toEqual(true)
  })

  test('should create unhandled error if render route has any exception', async () => {
    const nuxt = createNuxt()
    const error = new Error('render route failed')
    nuxt.server.renderRoute.mockImplementationOnce(() => {
      throw error
    })
    const generator = new Generator(nuxt)
    generator._formatErrors = jest.fn(() => 'formatted errors')

    const route = '/foo'
    const payload = {}
    const errors = []

    const returned = await generator.generateRoute({ route, payload, errors })

    expect(nuxt.server.renderRoute).toBeCalledTimes(1)
    expect(nuxt.server.renderRoute).toBeCalledWith('/foo', { payload })
    expect(nuxt.callHook).toBeCalledWith('generate:routeFailed', {
      route,
      errors: [{ type: 'unhandled', route, error }]
    })
    expect(generator._formatErrors).toBeCalledTimes(1)
    expect(generator._formatErrors).toBeCalledWith([{ type: 'unhandled', route, error }])
    expect(consola.error).toBeCalledTimes(1)
    expect(consola.error).toBeCalledWith('formatted errors')
    expect(errors).toEqual([{
      error,
      route,
      type: 'unhandled'
    }])
    expect(returned).toEqual(false)
  })

  test('should create handled error if render route failed', async () => {
    const nuxt = createNuxt()
    nuxt.options.build.html = { minify: false }
    nuxt.options.generate.minify = undefined
    const error = new Error('render route failed')
    nuxt.server.renderRoute.mockReturnValueOnce({
      html: 'renderer html',
      error
    })
    const generator = new Generator(nuxt)

    const route = '/foo'
    const payload = {}
    const errors = []

    const returned = await generator.generateRoute({ route, payload, errors })

    expect(consola.error).toBeCalledTimes(1)
    expect(consola.error).toBeCalledWith('Error generating route "/foo": render route failed')
    expect(errors).toEqual([{
      error,
      route,
      type: 'handled'
    }])
    expect(returned).toEqual(true)
  })

  test('should warn generate.minify deprecation message', async () => {
    const nuxt = createNuxt()
    nuxt.options.build.html = { minify: false }
    nuxt.options.generate.minify = false
    const generator = new Generator(nuxt)

    const route = '/foo'

    const returned = await generator.generateRoute({ route })

    expect(consola.warn).toBeCalledTimes(1)
    expect(consola.warn).toBeCalledWith(
      'generate.minify has been deprecated and will be removed in the next major version. Use build.html.minify instead!'
    )
    expect(returned).toEqual(true)
  })

  test('should minify generated html', async () => {
    const nuxt = createNuxt()
    nuxt.options.build.html = { minify: { value: 'test-minify' } }
    nuxt.options.generate.minify = undefined
    const generator = new Generator(nuxt)
    htmlMinifier.minify.mockReturnValueOnce('minified rendered html')

    const route = '/foo'

    const returned = await generator.generateRoute({ route })

    expect(htmlMinifier.minify).toBeCalledTimes(1)
    expect(htmlMinifier.minify).toBeCalledWith('rendered html', { value: 'test-minify' })
    expect(fsExtra.writeFile).toBeCalledTimes(1)
    expect(fsExtra.writeFile).toBeCalledWith(expect.any(String), 'minified rendered html', 'utf8')
    expect(fsExtra.writeFile.mock.calls[0][0]).toBePath(
      '/var/nuxt/generate/foo.html',
      'C:\\nuxt\\generate\\foo.html'
    )
    expect(returned).toEqual(true)
  })

  test('should create unhandled error if minify failed', async () => {
    const nuxt = createNuxt()
    nuxt.options.build.html = { minify: { value: 'test-minify' } }
    nuxt.options.generate.minify = undefined
    const generator = new Generator(nuxt)
    htmlMinifier.minify.mockImplementationOnce(() => {
      throw new Error('minify html failed')
    })

    const route = '/foo'
    const errors = []

    const returned = await generator.generateRoute({ route, errors })

    expect(htmlMinifier.minify).toBeCalledTimes(1)
    expect(htmlMinifier.minify).toBeCalledWith('rendered html', { value: 'test-minify' })
    expect(errors).toEqual([{
      route,
      type: 'unhandled',
      error: new Error('HTML minification failed. Make sure the route generates valid HTML. Failed HTML:\n rendered html')
    }])
    expect(returned).toEqual(true)
  })

  test('should generate file in sub folder', async () => {
    const nuxt = createNuxt()
    nuxt.options.build.html = { minify: false }
    nuxt.options.generate.subFolders = true
    const generator = new Generator(nuxt)

    const route = '/foo'

    const returned = await generator.generateRoute({ route })

    expect(fsExtra.writeFile).toBeCalledTimes(1)
    expect(fsExtra.writeFile).toBeCalledWith(expect.any(String), 'rendered html', 'utf8')
    expect(fsExtra.writeFile.mock.calls[0][0]).toBePath(
      '/var/nuxt/generate/foo/index.html',
      'C:\\nuxt\\generate\\foo\\index.html'
    )
    expect(returned).toEqual(true)
  })

  test('should generate 404 file in flat folder', async () => {
    const nuxt = createNuxt()
    nuxt.options.build.html = { minify: false }
    nuxt.options.generate.subFolders = true
    const generator = new Generator(nuxt)

    const route = '/404'

    const returned = await generator.generateRoute({ route })

    expect(fsExtra.writeFile).toBeCalledTimes(1)
    expect(fsExtra.writeFile).toBeCalledWith(expect.any(String), 'rendered html', 'utf8')
    expect(fsExtra.writeFile.mock.calls[0][0]).toBePath(
      '/var/nuxt/generate/404.html',
      'C:\\nuxt\\generate\\404.html'
    )
    expect(returned).toEqual(true)
  })

  test('should generate file in flat folder if route is empty', async () => {
    const nuxt = createNuxt()
    nuxt.options.build.html = { minify: false }
    const generator = new Generator(nuxt)

    const route = ''

    const returned = await generator.generateRoute({ route })

    expect(fsExtra.writeFile).toBeCalledTimes(1)
    expect(fsExtra.writeFile).toBeCalledWith(expect.any(String), 'rendered html', 'utf8')
    expect(fsExtra.writeFile.mock.calls[0][0]).toBePath(
      '/var/nuxt/generate/index.html',
      'C:\\nuxt\\generate\\index.html'
    )
    expect(returned).toEqual(true)
  })
})