import {
  login,
  logout,
  getInfo,
  uploadAvatar
} 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 = {
  // upload
  uploadAvatar({
    commit
  }, file) {
    return new Promise((resolve, reject) => {
      uploadAvatar(file).then(data => {
        resolve(data)
      }).catch(error => {
        reject(error)
      })
    })
  },
  // user login
  login({
    commit
  }, userInfo) {
    const {
      username,
      password
    } = userInfo
    return new Promise((resolve, reject) => {
      login({
        username: username.trim(),
        password: password
      }).then(data => {
        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 => {
        let data = {
          'roles': [],
          'introduction': '',
          'avatar': '',
          'name': ''
        }
        response.data.forEach(v => {
          data.roles.push(v.name)
        })

        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)
      })
    })
  },

  // get user info test
  getInfo1({
    commit,
    state
  }) {
    return new Promise((resolve, reject) => {
      let response = { data: [{ name: 'admin' }] }
      let data = {
        'roles': [],
        'introduction': '',
        'avatar': 'https://wpimg.wallstcn.com/69a1c46c-eb1c-4b46-8bd4-e9e686ef5251.png',
        'name': ''
      }
      response.data.forEach(v => {
        data.roles.push(v.name)
      })

      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)
    })
  },
  // 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
}
