// 实现这个项目的构建任务
const { src, dest, parallel,series,watch } = require('gulp')
const loadPlugins = require('gulp-load-plugins')

const del = require('del')
const browserSync = require('browser-sync')
const minimist = require('minimist')
const pkg = require('./package.json')

const plugins = loadPlugins()

const bs = browserSync.create()

const data = {
  menus: [
      {
          name: 'Home',
          icon: 'aperture',
          link: 'index.html'
      },
      {
          name: 'Features',
          link: 'features.html'
      },
      {
          name: 'About',
          link: 'about.html'
      },
      {
          name: 'Contact',
          link: '#',
          children: [
              {
              name: 'Twitter',
              link: 'https://twitter.com/w_zce'
              },
              {
              name: 'About',
              link: 'https://weibo.com/zceme'
              },
              {
              name: 'divider'
              },
              {
              name: 'About',
              link: 'https://github.com/zce'
              }
          ]
      }
  ],
  pkg: require('./package.json'),
  date: new Date()
}

const config{
  'debug': process.env.NODE_ENV !== 'production'
}
const clean = () =>{
    return del(['dist','temp'])
}

const styles = () =>{
  return src('src/assets/styles/*.scss',{base:'src'})
    .pipe(plugins.sass({outputStyle:'expanded'}))
    .pipe(plugins.if(!config.debug, plugins.autoprefixer({ browsers: pkg.browserslist })))
    .pipe(dest('temp'))
    .pipe(bs.reload({stream:true}))
}

const script = () =>{
  return src('src/assets/scripts/*.js',{base:'src'})
    .pipe(plugins.babel({presets:['@babel/preset-env']}))
    .pipe(dest('temp'))
    .pipe(bs.reload({stream:true}))
}

const pages = () =>{
  return src('src/**/*.html',{base:'src'})
    .pipe(plugins.plumber())
    .pipe(plugins.swig({ data,defaults: { cache: false }}))
    .pipe(dest('temp'))
    .pipe(bs.reload({stream:true}))
}

const image = () => {
  return src('src/assets/images/**',{base:'src'})
    .pipe(plugins.imagemin())
    .pipe(dest('dist'))
}
const font = () => {
  return src('src/assets/fonts/**',{base:'src'})
    .pipe(plugins.imagemin())
    .pipe(dest('dist'))
}

const extra = () =>{
  return src('public/**',{base:'public'})
    .pipe(dest('dist'))
}

const serve = () =>{
  watch('src/assets/styles/*.scss',styles)
  watch('src/assets/scripts/*.js',script)
  watch('src/**/*.html',pages)
  watch([
    'src/assets/images/*',
    'src/assets/fonts/**',
    'public/**'
  ],bs.reload)
  bs.init({
    notify:false,
    port: 2080,
    files: 'dist/**',
    server: {
      baseDir: ['dist'],
      // baseDir: ['dist'],
      routes:{
        '/node_modules': 'node_modules'
      }
    }
  })
}
const useref = () =>{
  return src('temp/**/*.html', {base: 'temp'})
    .pipe(plugins.useref({searchPath: ['temp','.']}))
    // html js css
    .pipe(plugins.if(/\.js$/,plugins.uglify()))
    .pipe(plugins.if(/\.css$/,plugins.cleanCss()))
    .pipe(plugins.if(/\.html$/,plugins.htmlmin({
      collapseWhitespace:true,
      minifyCSS: true,
      minifyJS: true
    })))
    .pipe(dest('dist'))
}

const argv = minimist(process.argv.slice(2))
const upload = () =>{
  return src('**', { cwd: 'dist' })
    .pipe(
        plugins.ghPages({
            branch: argv.branch === undefined ? 'gh-pages' : argv.branch
        })
    )
}

const lint = () => {
  return src('src/assets/scripts/*.js', {base:'src'})
    .pipe(plugins.eslint({
      "rules":{
        "arrow-parens": 0,
        "arrow-spacing": 0,
        "comma-spacing": 0,
        "generator-star-spacing": 0,
        "key-spacing": [0, { "beforeColon": false, "afterColon": true }],
      },
      "env": {
        "browser": true,
        "commonjs": true,
        "es6": true
      }
  }))
    .pipe(plugins.eslint.format())
    .pipe(plugins.eslint.failAfterError())
}

const compile = parallel(styles,script,pages,)
const build = series(clean,parallel(series(compile,useref),image,font,extra))

const start = series(build,serve)

const deploy = series(build,upload)

module.exports = {
  clean,build,start,serve,deploy,lint
}