import Vue from 'vue'
import { resetRouter } from '@/router'
import { Role } from '@/constant'

const state = {
  token: '',
  name: '',
  avatar: '',
  roles: null,
  access: null
}

const mutations = {
  SET_TOKEN (state, token) {
    state.token = token
  },
  SET_NAME (state, name) {
    state.name = name
  },
  SET_AVATAR (state, avatar) {
    state.avatar = avatar
  },
  SET_ROLES (state, roles) {
    state.roles = roles
  },
  SET_ACCESSES (state, accesses) {
    state.accesses = accesses
  }
}

function parseRealmAccess (realmAccess) {
  const roleSet = new Set()
  if (realmAccess) {
    const roleArray = Object.values(Role)
    realmAccess.roles.forEach(role => {
      if (roleArray.includes(role)) {
        roleSet.add(role)
      }
    })
  }
  if (!roleSet.size) {
    roleSet.add(Role.VISITOR)
  }
  return roleSet
}

function parseResourceAccess (resourceAccess) {
  const accessSet = new Set()
  if (resourceAccess) {
    Object.keys(resourceAccess).forEach(client => {
      resourceAccess[client].roles.forEach(role => {
        accessSet.add(`${client}:${role}`)
      })
    })
  }
  return accessSet
}

const actions = {
  login ({ commit }, keycloak) {
    if (keycloak.authenticated) {
      const { preferred_username, family_name, given_name, avatar } = keycloak.tokenParsed
      commit('SET_TOKEN', keycloak.token)
      commit('SET_ROLES', parseRealmAccess(keycloak.realmAccess))
      commit('SET_ACCESSES', parseResourceAccess(keycloak.resourceAccess))
      commit('SET_NAME', family_name && given_name ? `${family_name}${/[a-zA-z]/.test(family_name) ? ' ' : ''}${given_name}` : preferred_username)
      commit('SET_AVATAR', avatar)
    }
  },

  logout ({ dispatch }) {
    // 登出将跳转页面，所以不需其他操作
    Vue.prototype.$keycloak.logout()
    dispatch('clearToken')
  },

  clearToken ({ commit }) {
    commit('SET_TOKEN', '')
    Vue.prototype.$keycloak.refreshToken = null
    resetRouter()
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}