<template>
  <div style="background: #ececec; padding: 15px">
    <a-card title="按学院 / 专业分析" :loading="loading" :bordered="false">
      <template #extra>
        <a-select v-model:value="college" style="width: 300px" mode="multiple" :max-tag-count="2"
          :options="collegeOptions" @change="onCollegeMajorChange"></a-select>
        <!-- <a-select v-model:value="batch" style="margin-left: 10px;width: 120px" :options="batchOptions"></a-select> -->
        <!-- <a-select v-model:value="level" style="margin-left: 10px;width: 120px" :options="levelOptions"></a-select> -->
        <a-select v-model:value="entrydate" style="margin-left: 10px;width: 150px"
          :options="entrydateOptions"></a-select>
        <a-button style="margin-left: 10px;" type="primary" @click="query">查询</a-button>
      </template>
      <a-row :gutter="24">
        <a-col :xl="24" :style="{ marginBottom: '24px' }">
          <div class="container">
            <div id="map1" style="width: 100%; height: 400px;"></div>
          </div>
        </a-col>
      </a-row>
    </a-card>
  </div>
</template>

<script>
import { defHttp } from '/@/utils/http/axios';
import * as echarts from 'echarts';

export default {
  name: "Analysis",
  data() {
    return {
      Url: {
        getBatch: '/cet/getBatch',
        getEntrydate: '/cet/getEntrydate',
        getCollege: '/cet/getCollege',
        getRate: '/cet/getRateByCollege'
      },
      loading: false,
      collegeOptions: [],
      batchOptions: [],
      levelOptions: [
        { value: 'cet4', label: '英语四级' },
        { value: 'cet6', label: '英语六级' }
      ],
      level: null,
      college: null,
      batch: null,
      entrydateOptions: [],
      entrydate: null,

    };
  },
  methods: {
    getCollegeOptions() {
      defHttp.get({ url: this.Url.getCollege }).then(res => {
        this.collegeOptions = res.colleges;
        // 手动添加一个全校字段
        this.collegeOptions.unshift({ value: '全校', label: '全校' });
        this.collegeOptions.forEach(option => {
          if (option.value !== '全校') {
            option.disabled = true;
          }

        });
        this.college = ['全校'];
      });
    },
    onCollegeMajorChange(value) {
      if (value.includes('全校')) {
        this.collegeOptions.forEach(option => {
          if (option.value !== '全校') {
            option.disabled = true;
          }
        });
      } else {
        this.collegeOptions.forEach(option => {
          option.disabled = false;
          if (value !== '全校' && option.value === '全校') {
            option.disabled = true;
          }
          if (value.length === 0) {
            option.disabled = false;
          }
        });
      }
      console.log(value);
    },
    dataChart(data) {
      let xData = [];
      let yData = [];
      for (let key in data) {
        xData.push(data[key].college);
        // 将数据转换为百分比（加上%）
        yData.push(data[key].passRate);
      }
      let rankData = yData.slice().sort((a, b) => b - a).map((value) => yData.indexOf(value) + 1);
      xData = xData.map(label => label.split("").join("\n"));//将x轴竖着展示
      let myChart = echarts.init(document.getElementById("map1"));
      // 指定图表的配置项和数据
      let option = {
        title: {
          text: "本批次学院通过率排名",
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'shadow'
          },
          formatter: function (params) {
            return params[0].name + '<br/>' +
              '<table>' +
              '<tr><td>' + params[0].marker + params[0].seriesName + '</td><td style="font-weight: bold;">' + '&nbsp;&nbsp;&nbsp;&nbsp;' + params[0].value + '%' + '</td></tr>' +
              '<tr><td>' + params[1].marker + params[1].seriesName + '</td><td style="font-weight: bold;">' + '&nbsp;&nbsp;&nbsp;&nbsp;' + params[1].value + '</td></tr>' +
              '</table>';
          }
        },
        toolbox: {
          show: true,
          feature: {

            magicType: { show: true, type: ['line', 'bar'] },
            restore: { show: true },
            saveAsImage: { show: true }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            type: 'category',
            data: xData,
            axisLabel: {
              interval: 0,//代表显示所有x轴标签显示
              rotate: 0,//代表倾斜0度显示
            }
          }
        ],
        yAxis: [
          {
            type: 'value',
            name: '通过率',
            axisLabel: {
              formatter: '{value} %'
            }
          },
          {
            type: 'value',
            name: '排名',
            show: false,
          }
        ],
        series: [
          {
            name: '累计总通过率',
            type: 'bar',
            barWidth: '60%',
            data: yData,
            itemStyle: {
              normal: {
                label: {
                  show: true, //开启显示
                  position: 'top', //在上方显示
                  textStyle: { //数值样式
                    color: 'black',
                    fontSize: 13
                  },
                  formatter: '{c}%'
                }
              }
            },
            yAxisIndex: 0,
          },
          {
            name: '排名',
            type: 'bar',
            data: rankData,
            label: {
              show: false,
              position: 'inside',
              formatter: '{c}',
            },
            yAxisIndex: 1,
          },
        ]
      };
      // 使用刚指定的配置项和数据显示图表。
      myChart.setOption(option);
    },
    // 获取批次数据
    async getBatch() {
      const getBatch = await defHttp.get({ url: this.Url.getBatch });
      this.batchOptions = getBatch.batches;
      this.batch = this.batchOptions[0].value;
      this.level = this.levelOptions[0].value;
    },
    //获取年级数据
    async getEntrydate() {
      const getEntrydate = await defHttp.get({ url: this.Url.getEntrydate });
      this.entrydateOptions = getEntrydate.entrydates;
      this.entrydate = this.entrydateOptions[0].value;
    },
    // 查询数据
    async query() {
      let result = null;
      console.log(this.college, this.entrydate);
      //如果this.college和this.batch为null则先赋静态值
      if (this.college === null || this.college.length === 0) {
        this.college = ['全校'];
      }
      if (!this.entrydate) {
        this.entrydate = '2017';
      }
      try {
        this.loading = true;
        console.log(this.college, this.entrydate)
        let params = {
          college: this.college,
          entrydate: this.entrydate,
          level: 'cet4'
        }
        console.log(params.college, "college")
        result = await defHttp.post({ url: this.Url.getRate, params });
        //使数据按照passRate从大到小排序
        result.data.sort((a, b) => {
          return b.passRate - a.passRate;
        });
        console.log("data", result.data);
      } finally {
        this.loading = false;
        this.$nextTick(() => {
          this.dataChart(result.data);
        })
      }
    }
  },
  mounted() {
    this.getCollegeOptions();
    // this.getBatch();
    this.getEntrydate();
    this.query();
  }

}
</script>

<style lang="less" scoped>
.container {
  display: flex;
  background-color: #fff;
  padding: 15px;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.09);
}

.title {
  font-size: 34px;
  color: rgb(8, 8, 8);
  font-weight: bold;
}
</style>
