dianshang-qianduan/src/views/teacherEnd/exam/analysis.vue

<template>
  <main class="analysis-page" v-loading="loading">
    <header class="page-head"><div><el-button text :icon="ArrowLeft" @click="$router.push('/exam/index')">返回考评管理</el-button><h1>{{ data.examName || '考试数据分析' }}</h1></div><el-select v-model="classId" clearable placeholder="全部班级" @change="load"><el-option v-for="item in classes" :key="item.id" :label="item.name" :value="item.id" /></el-select></header>
    <section class="metrics"><div v-for="item in metrics" :key="item.label"><span>{{ item.label }}</span><strong>{{ item.value }}</strong></div></section>
    <section class="analysis-grid">
      <div class="chart-block"><h2>成绩分布</h2><div ref="chartEl" class="chart" /></div>
      <div class="hardest"><h2>得分率最低题目</h2><ol><li v-for="item in data.hardestQuestions || []" :key="item.id"><div>{{ item.stem }}</div><span>得分率 {{ item.scoreRate ?? 0 }}% · {{ item.wrongCount }} 人失分</span></li></ol><div v-if="!data.hardestQuestions?.length" class="table-empty"><el-icon class="empty-icon"><FolderOpened /></el-icon><p class="empty-title">暂无题目得分数据</p><p class="empty-tip">考试结束后将自动统计得分率最低的题目</p></div></div>
    </section>
  </main>
</template>
<script setup>
import { computed, nextTick, onBeforeUnmount, onMounted, ref } from "vue";
import { useRoute } from "vue-router";
import { ArrowLeft, FolderOpened } from "@element-plus/icons-vue";
import * as echarts from "echarts";
import * as examApi from "@/api/exam";
const route = useRoute(); const examId = route.params.id; const loading = ref(false); const data = ref({}); const classes = ref([]); const classId = ref(""); const chartEl = ref(); let chart;
const metrics = computed(() => [{ label: "应考人数", value: data.value.expected || 0 }, { label: "实考人数", value: data.value.attended || 0 }, { label: "及格人数", value: data.value.passed || 0 }, { label: "不及格人数", value: data.value.failed || 0 }, { label: "最高分", value: data.value.highest || 0 }, { label: "最低分", value: data.value.lowest || 0 }, { label: "平均分", value: data.value.average || 0 }]);
onMounted(async () => { classes.value = (await examApi.getTeacherExam(examId)).data?.classes || []; await load(); window.addEventListener("resize", resize); }); onBeforeUnmount(() => window.removeEventListener("resize", resize));
async function load() { loading.value = true; try { data.value = (await examApi.getExamAnalysis(examId, { classId: classId.value || undefined })).data; await nextTick(); renderChart(); } finally { loading.value = false; } }
function renderChart() { chart ||= echarts.init(chartEl.value); chart.setOption({ backgroundColor: "transparent", tooltip: { trigger: "item", backgroundColor: "#ffffff", borderColor: "#e5e7eb", textStyle: { color: "#1f2937" } }, legend: { bottom: 0, textStyle: { color: "#6b7280", fontSize: 11 } }, color: ["#3b82f6", "#2ba471", "#f59e0b", "#ef4444"], series: [{ type: "pie", radius: ["48%", "72%"], center: ["50%", "44%"], label: { formatter: "{b}\n{c}人", color: "#6b7280", fontSize: 11 }, data: data.value.distribution || [] }] }); }
function resize() { chart?.resize(); }
</script>
<style scoped lang="scss">
.analysis-page {
  color: var(--text-strong);

  /* ===== 标题行（轻量标题行；卡片外观归 teacher-light.scss 扁平化接管）===== */
  .page-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;

    h1 {
      margin: var(--sp-2) 0 0;
      color: var(--text-strong);
      font-size: var(--fs-page);
      font-weight: 700;
    }

    .el-select {
      width: var(--field-w);
    }
  }

  /* ===== 指标条 ===== */
  .metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin: var(--sp-5) 0;

    div {
      padding: var(--sp-4) var(--sp-3);
      border-right: 1px solid var(--border-color);
      display: grid;
      gap: var(--sp-2);
      min-width: 0;

      &:last-child {
        border: 0;
      }
    }

    span {
      font-size: var(--fs-body);
      color: var(--text-body);
    }

    strong {
      font-size: var(--fs-kpi);
      color: var(--text-strong);
      line-height: 1;
    }
  }

  /* ===== 图表双栏（图表容器卡白底）===== */
  .analysis-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(360px, 0.9fr);
    gap: var(--sp-5);
  }

  .chart-block,
  .hardest {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--r-card);
    padding: var(--sp-4);
    min-width: 0;
  }

  h2 {
    color: var(--text-strong);
    font-size: var(--fs-card);
    font-weight: 700;
    margin: 0 0 var(--sp-3);
  }

  .chart {
    height: 390px;
  }

  /* ===== 失分率最高题目列表 ===== */
  .hardest ol {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: item;
  }

  .hardest li {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--sp-4);
    padding: var(--sp-3) 0;
    border-bottom: 1px solid var(--border-color);
    line-height: 1.6;
    font-size: var(--fs-body);
    color: var(--text-strong);

    &:before {
      counter-increment: item;
      content: counter(item);
      grid-row: 1;
      display: none;
    }

    span {
      color: var(--text-body);
      font-size: var(--fs-tag);
      white-space: nowrap;
    }
  }

  /* ===== 自定义空状态 ===== */
  .table-empty {
    padding: var(--sp-5) 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--sp-1);

    .empty-icon {
      font-size: 28px;
      color: var(--text-muted);
    }

    .empty-title {
      margin: var(--sp-1) 0 0;
      font-size: var(--fs-body);
      font-weight: 600;
      color: var(--text-body);
    }

    .empty-tip {
      margin: 0;
      font-size: var(--fs-tag);
      color: var(--text-muted);
    }
  }

  @media (max-width: 900px) {
    .analysis-grid {
      grid-template-columns: 1fr;
    }
  }
}
</style>