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import Vue from 'vue'
import App from './App.vue'
import store from './store'
//1.导入ant-design-vue组件库
import Antd from 'ant-design-vue'
//2.导入组件库的样式表
import 'ant-design-vue/dist/antd.css'

Vue.config.productionTip = false
//3.安装组件库
Vue.use(Antd)

new Vue({
  store,
  render: h => h(App)
}).$mount('#app')

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import Vue from 'vue'
import Vuex from 'vuex'
import axios from 'axios'

Vue.use(Vuex)

export default new Vuex.Store({
  state: {
    //所有的任务列表
    list:[],
    inputValue:'aaa',
    nextId:0,
    viewKey:'all',
   
  },
  mutations: {
   initList(state,arr){
     state.list=arr
   },
   //为文本框中的inputValue赋值
   setInputValue(state,val){
     state.inputValue=val
   },
   //新增列表数据
   addItem(state){  
     state.nextId=state.list.length//给新增的id赋值
     const obj={
       id:state.nextId,
       info:state.inputValue.trim(),
       done:false
     }
     state.list.push(obj);
     state.nextId++;
     state.inputValue=''
   },
   //根据id删除元素
   removeItem(state,id){
     //根据id查找对应项的索引
    const i= state.list.findIndex((x)=>x.id===id)
    //删除对于索引的元素
    if(i!==-1){
      state.list.splice(i,1)
    }
   },
   //复选框状态改变
   doneChange(state,par){
     const i=state.list.findIndex((x)=>x.id===par.id)
     if(i!==-1){
      state.list[i].done=par.done
     }
   },
   //清除已完成的任务
   cleanDone(state){
     state.list= state.list.filter(x=>x.done===false)
   },
   //切换页面上展示的数据
   changeViewKey(state,a){
     state.viewKey=a
   }
  },
  // axios发请求是异步操作
actions: {
    //获取数据（初始化）
    getList(context){
      axios.get('/list.json').then(({data})=>{
        context.commit('initList',data)
      })
    }
  },
getters:{
  //未选中的条数
  unDoneLength(state){
    return state.list.filter(x=>x.done===false).length
  },
  //切换页面上展示的数据
  tempList(state){
        if(state.viewKey==='undone'){
          return state.list.filter(x=>x.done===false)
       //等同于return state.list.filter(x=>!x.done)
        }else if(state.viewKey==='done'){
          return state.list.filter(x=>x.done===true)
        }else if(state.viewKey==='all'){
         return state.list
        }
        return state.list  
  }
  
},
    
  modules: {
  }
  
})

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<template>
  <div id="app">
    <a-input placeholder="请输入任务" class="my_ipt" :value='inputValue' @change="handleInputChange"/>
    <a-button type="primary" @click="additemToList">添加事项</a-button>

    <a-list bordered :dataSource="tempList" class="dt_list">
      <a-list-item slot="renderItem" slot-scope="item">
        <!-- 复选框 -->
        <a-checkbox :checked="item.done" @change="(e)=>{changeChecked(e,item.id)}">{{ item.info }}</a-checkbox>
        <!-- 删除链接 -->
        <a slot="actions" @click="deleteItem(item.id)">删除</a>
      </a-list-item>

      <!-- footer区域 -->
      <div class="footer" slot="footer">
        <span>{{unDoneLength}}条剩余</span>
        <a-button-group>
          <a-button :type="viewKey==='all'? 'primary':'default'" @click="changeList('all')">全部</a-button>
          <a-button :type="viewKey==='undone'? 'primary':'default'" @click="changeList('undone')">未完成</a-button>
          <a-button :type="viewKey==='done'? 'primary':'default'" @click="changeList('done')">已完成</a-button>
        </a-button-group>
        <a @click="clean" style="color:green">清除已完成</a>
      </div>
    </a-list>
  </div>
</template>

<script>

import {mapState,mapGetters} from 'vuex'
export default {
  name: "app",
  data() {
    return {};
  },
  computed:{
     ...mapState(['list','inputValue','viewKey']),
     ...mapGetters(['unDoneLength','tempList'])
  },
  methods:{
    //监听文本框内容变化
    handleInputChange(e){
      //console.log(e.target.value)//e.target.value可以拿到文本框中的值
      this.$store.commit('setInputValue',e.target.value)
    },
    //向列表中新增item项
    additemToList(){
      if(this.inputValue.trim().length<=0){
        return this.$message.warning('文本框内容不能为空！')
      }
      this.$store.commit('addItem')
      },
      deleteItem(id){
        this.$store.commit('removeItem',id)
      },
      //监听复选框选中状态
      changeChecked(e,id){
        const par={
          id:id,
          done:e.target.checked //e.target.checked可以直接拿到复选框的选中状态
        }
        this.$store.commit('doneChange',par)
      },
       //清除已完成的任务
      clean(){
        this.$store.commit('cleanDone')
      },
      //切换页面上展示的数据
      changeList(a){
        this.$store.commit('changeViewKey',a)
      }
    
  },
  
  created(){
   this.$store.dispatch('getList')
  }
};
</script>
<style scoped>
#app {
  padding: 10px;
}
.my_ipt {
  width: 500px;
  margin-right: 10px;
}
.dt_list {
  width: 500px;
  margin-top: 10px;
}
.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
</style>

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[{
    "id": 0,
    "info": "Racing car sprays burning fuel into crowd.",
    "done": true
  },
  {
    "id": 1,
    "info": " Japanese princess to wed commoner.",
    "done": false
  },
  {
    "id": 2,
    "info": "Australian walks 100km after outback crash.",
    "done": false
  },
  {
    "id": 3,
    "info": "Man charged over missing wedding girl.",
    "done": false
  },
  {
    "id": 4,
    "info": "Los Angeles battles huge wildfires.",
    "done": false
  }
]