const fsExtra = require('fs-extra')
const path = require('path')
const fs = require('fs')
/**
 * 将函数封装成promise
 */
const promisify = fn => {
  return function () {
    let args = arguments;
    return new Promise(function (resolve, reject) {
      [].push.call(args, function (err, result) {
        if (err) {
          console.log(err)
          reject(err);
        } else {
          resolve(result);
        }
      });
      fn.apply(null, args);
    });
  }
}

const readdir = promisify(fs.readdir)
const stat = promisify(fs.stat)
/**
 * 封装打印工具
 */
const chalk = require('chalk')
const {log} = console
const chalkTag = {
  info: msg => log([chalk.bgBlue.black(' INFO '), msg].join(' ')),
  done: msg => log([chalk.bgGreen.black(' DONE '), msg].join(' ')),
  warn: msg => log([chalk.bgYellow.black(' WARN '), msg].join(' ')),
  error: msg => log([chalk.bgRed.black(' ERROR '), msg].join(' ')),
}

/**
 * 遍历应用的方法
 */
const findApp = (dir, cb) => {
  fsExtra.ensureDirSync(dir)
  return readdir(dir).then(apps => {
    return Promise.all(apps.map(e => {
      let cPath = path.join(dir, e)
      return stat(cPath).then(state => {
        if (state.isDirectory()) {
          return findApp(cPath, cb)
        } else if (state.isFile()) {
          cb && cb(cPath)
        }
      })
    }) || [])
  })
}
const start = () => {
  chalkTag.info('开始生成pages.json...')
  let json = {
    easycom: {
      "^u-(.*)": "uview-ui/components/u-$1/u-$1.vue",
      "^(Ai|V)(.*)": "@/components/$1$2/$1$2.vue"
    },
    pages: [
      {path: 'pages/home', style: {navigationBarTitleText: "小程序应用库"}}
    ],
    subPackages: [
      {root: "mods/", pages: []},
      {root: "components/pages/", pages: []}
    ],
    globalStyle: {
      pageOrientation: "auto",
      navigationBarTextStyle: "white",
      navigationBarBackgroundColor: "#4181FF",
      backgroundColor: "#4181FF"
    }
  }
  findApp('src/components/pages', file => {
    if (/.+\\[^\\]+\\[^\\]+\.vue/g.test(file)) {
      let app = {
        path: file.replace(/^src\\components\\pages\\(.*).vue/g, '$1').replace(/\\/g, '/')
      }
      let vue = fs.readFileSync(file).toString()
      if (/appName/.test(vue)) {
        let appName = vue.replace(/[\s\S]*(appName:.+),[\s\S]*/gm, '$1'),
            title = appName.replace(/(appName:|["'])/g, '')
        app.style = {navigationBarTitleText: title}
      }
      json.subPackages[1].pages.push(app)
    }
  }).then(() => {
    return findApp('src/mods', file => {
      if (/.+\\App[^\\]+\\[^\\]+\.vue/g.test(file)) {
        let app = {
          name: file.replace(/.*\\([^\\]+).vue/g, '$1'),
          path: file.replace(/^src\\mods\\(.*).vue/g, '$1').replace(/\\/g, '/')
        }
        let vue = fs.readFileSync(file).toString()
        if (/appName/.test(vue)) {
          let appName = vue.replace(/[\s\S]*(appName:.+),[\s\S]*/gm, '$1'),
              title = appName.replace(/(appName:|["'])/g, '')
          app.style = {navigationBarTitleText: title}
        }
        json.subPackages[0].pages.push(app)
      }
    }).then(() => {
      fsExtra.outputJson('src/pages.json', json, () => {
        chalkTag.done('生成pages.json')
      })
    })
  })

}

start();