<!--
 * @Author: ???????
 * @since: 2019-09-09 12:16:29
 * @LastEditTime: 2019-10-14 16:02:48
 * @LastEditors: ???????
 * @Description:
 -->
<template>
  <div class="app-container">
    <div class="filter-container">
      <el-input
        v-model="listQuery.title"
        placeholder="Title"
        style="width: 200px;"
        class="filter-item"
        @keyup.enter.native="handleFilter"
      />
      <el-select
        v-model="listQuery.importance"
        placeholder="Imp"
        clearable
        style="width: 90px"
        class="filter-item"
      >
        <el-option
          v-for="item in importanceOptions"
          :key="item"
          :label="item"
          :value="item"
        />
      </el-select>
      <el-select
        v-model="listQuery.type"
        placeholder="Type"
        clearable
        class="filter-item"
        style="width: 130px"
      >
        <el-option
          v-for="item in calendarTypeOptions"
          :key="item.key"
          :label="item.display_name + '(' + item.key + ')'"
          :value="item.key"
        />
      </el-select>
      <el-select
        v-model="listQuery.sort"
        style="width: 140px"
        class="filter-item"
        @change="handleFilter"
      >
        <el-option
          v-for="item in sortOptions"
          :key="item.key"
          :label="item.label"
          :value="item.key"
        />
      </el-select>
      <el-button
        v-waves
        class="filter-item"
        type="primary"
        icon="el-icon-search"
        @click="handleFilter"
      >
        Search
      </el-button>
      <el-button
        class="filter-item"
        style="margin-left: 10px;"
        type="primary"
        icon="el-icon-edit"
        @click="handleCreate"
      >
        Add
      </el-button>
      <el-button
        v-waves
        :loading="downloadLoading"
        class="filter-item"
        type="primary"
        icon="el-icon-download"
        @click="handleDownload"
      >
        Export
      </el-button>
      <el-checkbox
        v-model="showReviewer"
        class="filter-item"
        style="margin-left:15px;"
        @change="tableKey = tableKey + 1"
      >
        reviewer
      </el-checkbox>
    </div>

    <el-table
      :key="tableKey"
      v-loading="listLoading"
      :data="list"
      border
      fit
      highlight-current-row
      style="width: 100%;"
      @sort-change="sortChange"
    >
      <el-table-column
        label="ID"
        prop="id"
        sortable="custom"
        align="center"
        width="80"
        :class-name="getSortClass('id')"
      >
        <template slot-scope="scope">
          <span>{{ scope.row.id }}</span>
        </template>
      </el-table-column>
      <el-table-column label="Date" width="150px" align="center">
        <template slot-scope="scope">
          <span>{{
            scope.row.timestamp | parseTime('{y}-{m}-{d} {h}:{i}')
          }}</span>
        </template>
      </el-table-column>
      <el-table-column label="Title" min-width="150px">
        <template slot-scope="{ row }">
          <span class="link-type" @click="handleUpdate(row)">{{
            row.title
          }}</span>
          <el-tag>{{ row.type | typeFilter }}</el-tag>
        </template>
      </el-table-column>
      <el-table-column label="Author" width="110px" align="center">
        <template slot-scope="scope">
          <span>{{ scope.row.author }}</span>
        </template>
      </el-table-column>
      <el-table-column
        v-if="showReviewer"
        label="Reviewer"
        width="110px"
        align="center"
      >
        <template slot-scope="scope">
          <span style="color:red;">{{ scope.row.reviewer }}</span>
        </template>
      </el-table-column>
      <el-table-column label="Imp" width="80px">
        <template slot-scope="scope">
          <svg-icon
            v-for="n in +scope.row.importance"
            :key="n"
            icon-class="star"
            class="meta-item__icon"
          />
        </template>
      </el-table-column>
      <el-table-column label="Readings" align="center" width="95">
        <template slot-scope="{ row }">
          <span
            v-if="row.pageviews"
            class="link-type"
            @click="handleFetchPv(row.pageviews)"
          >
            {{ row.pageviews }}
          </span>
          <span v-else>0</span>
        </template>
      </el-table-column>
      <el-table-column label="Status" class-name="status-col" width="100">
        <template slot-scope="{ row }">
          <el-tag :type="row.status | statusFilter">
            {{ row.status }}
          </el-tag>
        </template>
      </el-table-column>
      <el-table-column
        label="Actions"
        align="center"
        width="230"
        class-name="small-padding fixed-width"
      >
        <template slot-scope="{ row }">
          <el-button type="primary" size="mini" @click="handleUpdate(row)">
            Edit
          </el-button>
          <el-button
            v-if="row.status != 'published'"
            size="mini"
            type="success"
            @click="handleModifyStatus(row, 'published')"
          >
            Publish
          </el-button>
          <el-button
            v-if="row.status != 'draft'"
            size="mini"
            @click="handleModifyStatus(row, 'draft')"
          >
            Draft
          </el-button>
          <el-button
            v-if="row.status != 'deleted'"
            size="mini"
            type="danger"
            @click="handleModifyStatus(row, 'deleted')"
          >
            Delete
          </el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total > 0"
      :total="total"
      :page.sync="listQuery.page"
      :limit.sync="listQuery.limit"
      @pagination="getList"
    />

    <el-dialog :title="textMap[dialogStatus]" :visible.sync="dialogFormVisible">
      <el-form
        ref="dataForm"
        :rules="rules"
        :model="temp"
        label-position="left"
        label-width="70px"
        style="width: 400px; margin-left:50px;"
      >
        <el-form-item label="Type" prop="type">
          <el-select
            v-model="temp.type"
            class="filter-item"
            placeholder="Please select"
          >
            <el-option
              v-for="item in calendarTypeOptions"
              :key="item.key"
              :label="item.display_name"
              :value="item.key"
            />
          </el-select>
        </el-form-item>
        <el-form-item label="Date" prop="timestamp">
          <el-date-picker
            v-model="temp.timestamp"
            type="datetime"
            placeholder="Please pick a date"
          />
        </el-form-item>
        <el-form-item label="Title" prop="title">
          <el-input v-model="temp.title" />
        </el-form-item>
        <el-form-item label="Status">
          <el-select
            v-model="temp.status"
            class="filter-item"
            placeholder="Please select"
          >
            <el-option
              v-for="item in statusOptions"
              :key="item"
              :label="item"
              :value="item"
            />
          </el-select>
        </el-form-item>
        <el-form-item label="Imp">
          <el-rate
            v-model="temp.importance"
            :colors="['#99A9BF', '#F7BA2A', '#FF9900']"
            :max="3"
            style="margin-top:8px;"
          />
        </el-form-item>
        <el-form-item label="Remark">
          <el-input
            v-model="temp.remark"
            :autosize="{ minRows: 2, maxRows: 4 }"
            type="textarea"
            placeholder="Please input"
          />
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogFormVisible = false">
          Cancel
        </el-button>
        <el-button
          type="primary"
          @click="dialogStatus === 'create' ? createData() : updateData()"
        >
          Confirm
        </el-button>
      </div>
    </el-dialog>

    <el-dialog :visible.sync="dialogPvVisible" title="Reading statistics">
      <el-table
        :data="pvData"
        border
        fit
        highlight-current-row
        style="width: 100%"
      >
        <el-table-column prop="key" label="Channel" />
        <el-table-column prop="pv" label="Pv" />
      </el-table>
      <span slot="footer" class="dialog-footer">
        <el-button type="primary" @click="dialogPvVisible = false">
          Confirm
        </el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
import {
  fetchList,
  fetchPv,
  createArticle,
  updateArticle
} from '@/api/article';
import waves from '@/directive/waves'; // waves directive
import { parseTime } from '@/utils';
import Pagination from '@/components/Pagination'; // secondary package based on el-pagination

const calendarTypeOptions = [
  { key: 'CN', display_name: 'China' },
  { key: 'US', display_name: 'USA' },
  { key: 'JP', display_name: 'Japan' },
  { key: 'EU', display_name: 'Eurozone' }
];

// arr to obj, such as { CN : "China", US : "USA" }
const calendarTypeKeyValue = calendarTypeOptions.reduce((acc, cur) => {
  acc[cur.key] = cur.display_name;
  return acc;
}, {});

export default {
  name: 'ComplexTable',
  components: { Pagination },
  directives: { waves },
  filters: {
    statusFilter(status) {
      const statusMap = {
        published: 'success',
        draft: 'info',
        deleted: 'danger'
      };
      return statusMap[status];
    },
    typeFilter(type) {
      return calendarTypeKeyValue[type];
    }
  },
  data() {
    return {
      tableKey: 0,
      list: null,
      total: 0,
      listLoading: true,
      listQuery: {
        page: 1,
        limit: 20,
        importance: undefined,
        title: undefined,
        type: undefined,
        sort: '+id'
      },
      importanceOptions: [1, 2, 3],
      calendarTypeOptions,
      sortOptions: [
        { label: 'ID Ascending', key: '+id' },
        { label: 'ID Descending', key: '-id' }
      ],
      statusOptions: ['published', 'draft', 'deleted'],
      showReviewer: false,
      temp: {
        id: undefined,
        importance: 1,
        remark: '',
        timestamp: new Date(),
        title: '',
        type: '',
        status: 'published'
      },
      dialogFormVisible: false,
      dialogStatus: '',
      textMap: {
        update: 'Edit',
        create: 'Create'
      },
      dialogPvVisible: false,
      pvData: [],
      rules: {
        type: [
          { required: true, message: 'type is required', trigger: 'change' }
        ],
        timestamp: [
          {
            type: 'date',
            required: true,
            message: 'timestamp is required',
            trigger: 'change'
          }
        ],
        title: [
          { required: true, message: 'title is required', trigger: 'blur' }
        ]
      },
      downloadLoading: false
    };
  },
  created() {
    this.getList();
  },
  methods: {
    getList() {
      this.listLoading = true;
      fetchList(this.listQuery).then(response => {
        this.list = response.data.items;
        this.total = response.data.total;

        // Just to simulate the time of the request
        setTimeout(() => {
          this.listLoading = false;
        }, 1.5 * 1000);
      });
    },
    handleFilter() {
      this.listQuery.page = 1;
      this.getList();
    },
    handleModifyStatus(row, status) {
      this.$message({
        message: 'Modify Success',
        type: 'success'
      });
      row.status = status;
    },
    sortChange(data) {
      const { prop, order } = data;
      if (prop === 'id') {
        this.sortByID(order);
      }
    },
    sortByID(order) {
      if (order === 'ascending') {
        this.listQuery.sort = '+id';
      } else {
        this.listQuery.sort = '-id';
      }
      this.handleFilter();
    },
    resetTemp() {
      this.temp = {
        id: undefined,
        importance: 1,
        remark: '',
        timestamp: new Date(),
        title: '',
        status: 'published',
        type: ''
      };
    },
    handleCreate() {
      this.resetTemp();
      this.dialogStatus = 'create';
      this.dialogFormVisible = true;
      this.$nextTick(() => {
        this.$refs['dataForm'].clearValidate();
      });
    },
    createData() {
      this.$refs['dataForm'].validate(valid => {
        if (valid) {
          this.temp.id = parseInt(Math.random() * 100) + 1024; // mock a id
          this.temp.author = 'vue-element-admin';
          createArticle(this.temp).then(() => {
            this.list.unshift(this.temp);
            this.dialogFormVisible = false;
            this.$notify({
              title: 'Success',
              message: 'Created Successfully',
              type: 'success',
              duration: 2000
            });
          });
        }
      });
    },
    handleUpdate(row) {
      this.temp = Object.assign({}, row); // copy obj
      this.temp.timestamp = new Date(this.temp.timestamp);
      this.dialogStatus = 'update';
      this.dialogFormVisible = true;
      this.$nextTick(() => {
        this.$refs['dataForm'].clearValidate();
      });
    },
    updateData() {
      this.$refs['dataForm'].validate(valid => {
        if (valid) {
          const tempData = Object.assign({}, this.temp);
          tempData.timestamp = +new Date(tempData.timestamp); // change Thu Nov 30 2017 16:41:05 GMT+0800 (CST) to 1512031311464
          updateArticle(tempData).then(() => {
            for (const v of this.list) {
              if (v.id === this.temp.id) {
                const index = this.list.indexOf(v);
                this.list.splice(index, 1, this.temp);
                break;
              }
            }
            this.dialogFormVisible = false;
            this.$notify({
              title: 'Success',
              message: 'Update Successfully',
              type: 'success',
              duration: 2000
            });
          });
        }
      });
    },
    handleDelete(row) {
      this.$notify({
        title: 'Success',
        message: 'Delete Successfully',
        type: 'success',
        duration: 2000
      });
      const index = this.list.indexOf(row);
      this.list.splice(index, 1);
    },
    handleFetchPv(pv) {
      fetchPv(pv).then(response => {
        this.pvData = response.data.pvData;
        this.dialogPvVisible = true;
      });
    },
    handleDownload() {
      this.downloadLoading = true;
      import('@/vendor/Export2Excel').then(excel => {
        const tHeader = ['timestamp', 'title', 'type', 'importance', 'status'];
        const filterVal = [
          'timestamp',
          'title',
          'type',
          'importance',
          'status'
        ];
        const data = this.formatJson(filterVal, this.list);
        excel.export_json_to_excel({
          header: tHeader,
          data,
          filename: 'table-list'
        });
        this.downloadLoading = false;
      });
    },
    formatJson(filterVal, jsonData) {
      return jsonData.map(v =>
        filterVal.map(j => {
          if (j === 'timestamp') {
            return parseTime(v[j]);
          } else {
            return v[j];
          }
        })
      );
    },
    /* eslint-disable indent */
    getSortClass: function(key) {
      const sort = this.listQuery.sort;
      return sort === `+${key}`
        ? 'ascending'
        : sort === `-${key}`
        ? 'descending'
        : '';
    }
  }
};
</script>
