import { login, logout, getInfo } from '@/api/user'
  import { getToken, setToken, removeToken } from '@/utils/auth'
  import router, { resetRouter } from '@/router'

  const state = {
    token: getToken(),
    name: '',
    avatar: '',
    introduction: '',
    roles: []
  }

  
  const mutations = {

    SET_TOKEN: (state, token) => {
      state.token = token
    },

    SET_INTRODUCTION: (state, introduction) => {
      state.introduction = introduction
    },

    SET_NAME: (state, name) => {
      state.name = name
    },
    SET_AVATAR: (state, avatar) => {
      state.avatar = avatar

    },
    SET_ROLES: (state, roles) => {
      state.roles = roles

    }
  }
  
  const actions = {
    // user login

    login({ commit }, userInfo) {
      const { username, password } = userInfo

      return new Promise((resolve, reject) => {

        login({ username: username.trim(), password: password }).then(response => {
          const { data } = response
          commit('SET_TOKEN', data.token)
          setToken(data.token)

          resolve()
        }).catch(error => {
          reject(error)
        })
      })
    },
  
    // get user info

    getInfo({ commit, state }) {

      return new Promise((resolve, reject) => {
        getInfo(state.token).then(response => {

          const { data } = response
  
          if (!data) {

            reject('Verification failed, please Login again.')
          }

  
          const { roles, name, avatar, introduction } = data

          // roles must be a non-empty array
          if (!roles || roles.length <= 0) {
            reject('getInfo: roles must be a non-null array!')
          }

          commit('SET_ROLES', roles)

          commit('SET_NAME', name)
          commit('SET_AVATAR', avatar)

          commit('SET_INTRODUCTION', introduction)
          resolve(data)

        }).catch(error => {
          reject(error)
        })
      })
    },
  
    // user logout

    logout({ commit, state, dispatch }) {

      return new Promise((resolve, reject) => {
        logout(state.token).then(() => {

          commit('SET_TOKEN', '')
          commit('SET_ROLES', [])
          removeToken()

          resetRouter()

  
          // reset visited views and cached views
          // to fixed https://github.com/PanJiaChen/vue-element-admin/issues/2485
          dispatch('tagsView/delAllViews', null, { root: true })

          resolve()
        }).catch(error => {
          reject(error)
        })
      })
    },
  
    // remove token

    resetToken({ commit }) {

      return new Promise(resolve => {

        commit('SET_TOKEN', '')
        commit('SET_ROLES', [])
        removeToken()
        resolve()
      })
    },
  
    // dynamically modify permissions
    changeRoles({ commit, dispatch }, role) {
      return new Promise(async resolve => {
        const token = role + '-token'
  
        commit('SET_TOKEN', token)
        setToken(token)
  
        const { roles } = await dispatch('getInfo')
  
        resetRouter()
  
        // generate accessible routes map based on roles
        const accessRoutes = await dispatch('permission/generateRoutes', roles, { root: true })
  
        // dynamically add accessible routes
        router.addRoutes(accessRoutes)
  
        // reset visited views and cached views
        dispatch('tagsView/delAllViews', null, { root: true })

        resolve()
      })
    }
  }
  
  export default {
    namespaced: true,
    state,
    mutations,
    actions
  }