import Vue from 'vue'
import Vuex from 'vuex'
import getters from './getters'
import createPersistedState from 'vuex-persistedstate'

Vue.use(Vuex)

// https://webpack.js.org/guides/dependency-management/#requirecontext
const modulesFiles = require.context('./modules', true, /\.js$/)

// you do not need `import app from './modules/app'`
// it will auto require all vuex module from modules file
const modules = modulesFiles.keys().reduce((modules, modulePath) => {
  // set './app.js' => 'app'
  const moduleName = modulePath.replace(/^\.\/(.*)\.\w+$/, '$1')
  const value = modulesFiles(modulePath)
  modules[moduleName] = value.default
  return modules
}, {})

const store = new Vuex.Store({
  modules,
  getters,
  actions: {
    load(context) {
      return this.dispatch("loadUser").then(() => {
        const promises = [];
        return Promise.all(promises);
      })
    },
    unload(context) {
      context.commit("clear");
    }
  },
  plugins: [
    createPersistedState({
      key: 'vuex',
      // 存储数据中的哪些数据（如果是模块下具体的数据需要加上模块名称，如 user.token）
      paths: ['user.userId', 'user.username']
    })
  ]
})

export default store