const path = require('path');
const { slugify } = require('@vuepress/shared-utils')
const highlight = require('@vuepress/markdown/lib/highlight')
const translatePlugin = require('./markdown/translate')
const headerPlugin = require('./markdown/header')
const createSidebar = require('./markdown/createSidebar')
const { simplifySlugText, tabs, getFormattedDate } = require('./utils')
const copyOptions = require('./config/copy');

const nowString = getFormattedDate();
const changeLoaderOptions = (options, key = 'name') => {
	if (options && options[key]) options[key] = `${nowString}/${options[key]}`;
	return options;
};

const base = '/uniCloud/'

const config = {
  base,
  theme: 'vuepress-theme-uni-app-test',
  title: 'uniCloud',
  description: 'uniCloud Document',
  evergreen: process.env.NODE_ENV === 'development',
  head: [
    ['link', {
      rel: 'shortcut icon',
      type: 'image/x-icon',
      href: 'https://qiniu-web-assets.dcloud.net.cn/unidoc/zh/icon.png?v=1556263038788'
    }],
    ['meta', {
      name: 'viewport', content: 'width=device-width, initial-scale=1.0, user-scalable=0, minimum-scale=1.0, maximum-scale=1.0'
    }],
    ['meta', {
      name: 'keywords', content: '数字天堂,前端开发,web开发,小程序开发,跨平台,跨平台开发,跨端开发,混合开发,serverless,云开发,云函数'
    }],
    ['script', { src: 'https://hm.baidu.com/hm.js?fe3b7a223fc08c795f0f4b6350703e6f' }],
    ['script', { src: '/miku-delivery-1.2.1.js' }],
    ['script', { src: `/js/miku.js?${Date.now()}&v=${Date.now()}&version=${Date.now()}` }]
  ],
  locales: {
    '/': {
      lang: 'zh-CN',
    }
  },
  themeConfig: {
    titleLogo: 'https://qiniu-web-assets.dcloud.net.cn/unidoc/zh/uni-app.png',
    logo: 'https://qiniu-web-assets.dcloud.net.cn/unidoc/zh/logo.png',
    sidebar: createSidebar(tabs),
    sidebarDepth: 0,
    nextLinks: false,
    prevLinks: false,
    repo: 'dcloudio/uni-app',
    docsRepo: 'https://gitcode.net/dcloud/unidocs-unicloud-zh',
    docsBranch: 'master',
    docsDir: 'docs',
    editLinks: true,
    editLinkText: '帮助我们改善此页面！',
    lastUpdated: '上次更新',
    // smoothScroll: true,
    search: false,
    algolia: {
      apiKey: '2fdcc4e76c8e260671ad70065e60b2e7',
      indexName: 'zh-uniapp',
      appId: 'PQIR5NL8CZ',
      searchParameters: { hitsPerPage: 50 }
    },
    isDevelopment: process.env.NODE_ENV === 'development'
  },
  markdown: {
    // toc: { includeLevel: [1, 2, 3, 4] },
    slugify (str) {
      if (typeof str !== 'string') return ''

      let slug = str
      if (slug.includes('@')) {
        let array = slug.split('@')
        slug = array.length > 1 ? array[array.length - 1] : str
      } else {
        slug = simplifySlugText(slug.toLowerCase()).trim()
      }
      return slugify(slug)
    },
    extractHeaders: ['h1', 'h2', 'h3', 'h4'],
    chainMarkdown (config) {
      const extensionMap = {
        uts: 'ts'
      }
      config.options.highlight((str, lang) => {
        const extension = extensionMap[lang]
        return highlight(str, extension || lang)
      })

      config
        .plugin('translate')
        .use(translatePlugin)
        .end()
        .plugin('convert-header')
        .use(headerPlugin)
        .end()
        .plugin('normallize-link')
        .use(require('./markdown/normallizeLink'))
        .end()
				.plugin('img-add-attrs')
				.use(require('./markdown/img-add-attrs'))
        .end()
				.plugin('attrs')
        .use(require('markdown-it-attrs'),[{
          leftDelimiter: '#{',
          rightDelimiter: '}'
        }])
        .end()
        .plugin('task-lists')
        .use(require('markdown-it-task-lists'))
        .end()
        .plugin('inject-json-to-md')
        .use(require('./markdown/inject-json-to-md'))
        .end()
        .plugin('markdown-it-raw-table')
        .use(require('markdown-it-raw-table'))
        .end()
        .plugin('add-base-to-md')
        .use(require('./markdown/add-base-to-md'), [{ base }])
    }
  },
  chainWebpack (config, isServer) {
    config.resolve.alias.set(
      '@theme-config',
      path.resolve(process.cwd(), 'docs/.vuepress/config')
    )
    config.output.filename(`${nowString}/${config.output.get('filename')}`); //输出文件名
    config.module.rule('images').use('url-loader').tap(changeLoaderOptions);
    config.module.rule('fonts').use('url-loader').tap(changeLoaderOptions);
    config.module.rule('media').use('url-loader').tap(changeLoaderOptions);
    config.module.rule('svg').use('file-loader').tap(changeLoaderOptions);
    if (!isServer && process.env.NODE_ENV === 'production') {
      const extract_css_plugin = config.plugin('extract-css');
      const extract_css_plugin_args = extract_css_plugin.get('args');
      if (extract_css_plugin_args) {
        extract_css_plugin.set(
          'args',
          extract_css_plugin_args.map(item =>
            changeLoaderOptions(item, 'filename')
          )
        );
      }
    }
  },
  patterns: ['**/!(_sidebar).md', '**/*.vue'],
  plugins: [
    ["vuepress-plugin-juejin-style-copy", copyOptions],
    [
      'named-chunks',
      {
        layoutChunkName: (layout) => 'layout-' + layout.componentName,
        pageChunkName: page => {
          const _context = page._context
          const pageHeaders = (page.headers || []).map(item => item.title).join(',')
          if (pageHeaders) {
            const originDescription = page.frontmatter.description || ''
            page.frontmatter = {
              ...page.frontmatter,
              description: `${_context.siteConfig.description ? `${_context.siteConfig.description},` : ''}${pageHeaders}${originDescription ? `,${originDescription}` : ''}`.slice(0, 150),
            }
          }
          const pagePath = page.path.indexOf('.html') === -1 ? page.path + 'index' : page.path
          const curPath = 'docs/' + pagePath.replace('docs/', '').substring(1).replace(/\.html/g, "")
          return curPath
        }
      }
    ]
  ],
  /**
   *
   * @param {string} path path: js 资源文件路径
   * @param {string} type type: 资源文件类型，取值有 script 等
   * @returns
   */
  shouldPrefetch: (path, type) => {
    if (type === 'script') return path.includes('vendors~') || path.includes('layout-') || path.includes('index.')
    return false
  }
}

module.exports = config