<script setup lang="ts">
import { computed, onMounted, reactive, ref } from 'vue'
import { Download, Plus, Promotion, Refresh, UserFilled, Setting } from '@element-plus/icons-vue'
import http, { apiErrorMessage } from '../api/http'
import { downloadApiFile } from '../api/excel'
import { useAuthStore } from '../stores/auth'
import { academicTermLabel, academicTermOptionClass, defaultAcademicTermId } from '../utils/academicTerms'

const auth = useAuthStore()
const isManager = computed(() =>
  auth.user?.roles.some((r) => ['SuperAdmin', 'AcademicAdmin'].includes(r)) ?? false)
const isTeacher = computed(() => auth.user?.roles.includes('Teacher') && !isManager.value)
const plans = ref<any[]>([])
const selected = ref<any | null>(null)
const personal = ref<any[]>([])
const terms = ref<any[]>([])
const tasks = ref<any[]>([])
const rooms = ref<any[]>([])
const teachers = ref<any[]>([])
const buildings = ref<any[]>([])
const timeSlots = ref<any[]>([])
const loading = ref(false)
const arrangeLoading = ref(false)
const exportLoading = ref(false)
const planDialog = ref(false)
const sessionDialog = ref(false)
const editingSession = ref<any | null>(null)
const rosterDrawer = ref(false)
const roster = ref<any | null>(null)
const selectedTaskIds = ref<string[]>([])
const selectedSessionIds = ref<string[]>([])
const planForm = reactive<Record<string, any>>({})
const sessionForm = reactive<Record<string, any>>({})
const taskFilter = reactive({ keyword: '', collegeId: '', courseNature: '' })
const sessionFilter = reactive({ keyword: '', allocation: '' })
const statusLabels: Record<string, string> = {
  Draft: '草稿', Published: '已发布', Archived: '已归档',
}
const courseNatureLabels: Record<string, string> = {
  GeneralRequired: '公共必修',
  GeneralElective: '公共选修',
  MajorRequired: '专业必修',
  MajorElective: '专业选修',
  Practice: '实践教学',
}
const taskColleges = computed(() => {
  const values = new Map<string, string>()
  tasks.value.forEach((task: any) => values.set(task.collegeId, task.collegeName))
  return Array.from(values, ([id, name]) => ({ id, name }))
})
const filteredTasks = computed(() => {
  const keyword = taskFilter.keyword.trim().toLowerCase()
  const arrangedIds = new Set((selected.value?.sessions ?? [])
    .filter((session: any) => session.id !== editingSession.value?.id)
    .map((session: any) => session.teachingTaskId))
  return tasks.value.filter((task: any) => {
    if (arrangedIds.has(task.id)) return false
    if (taskFilter.collegeId && task.collegeId !== taskFilter.collegeId) return false
    if (taskFilter.courseNature && task.courseNature !== taskFilter.courseNature) return false
    if (!keyword) return true
    return [task.taskNumber, task.courseCode, task.courseName, task.name,
      ...(task.teacherNames ?? []), ...(task.classNames ?? [])]
      .some((value: any) => String(value ?? '').toLowerCase().includes(keyword))
  })
})
const filteredSessions = computed(() => {
  const keyword = sessionFilter.keyword.trim().toLowerCase()
  return (selected.value?.sessions ?? []).filter((session: any) => {
    if (sessionFilter.allocation === 'room' && session.classroomId) return false
    if (sessionFilter.allocation === 'invigilator' &&
      session.invigilatorIds.length >= session.requiredInvigilatorCount) return false
    if (sessionFilter.allocation === 'complete' &&
      (!session.classroomId || session.invigilatorIds.length < session.requiredInvigilatorCount)) return false
    if (!keyword) return true
    return [session.taskNumber, session.courseCode, session.courseName, session.taskName]
      .some((value: any) => String(value ?? '').toLowerCase().includes(keyword))
  })
})

function timeText(startsAt: string) {
  return new Date(startsAt).toLocaleTimeString('zh-CN', { hour: '2-digit', minute: '2-digit', hour12: false })
}
function dateOnlyText(value: string) {
  if (!value) return ''
  return new Intl.DateTimeFormat('zh-CN', { month: '2-digit', day: '2-digit', weekday: 'short' }).format(new Date(value))
}
function periodLabel(session: any) {
  const end = session.startPeriod + session.periodCount - 1
  const startSlot = timeSlots.value.find((s: any) => s.periodNumber === session.startPeriod)
  const endSlot = timeSlots.value.find((s: any) => s.periodNumber === end)
  const timeRange = startSlot && endSlot ? `${startSlot.startsAt}—${endSlot.endsAt}` : ''
  return `第 ${session.startPeriod}-${end} 节${timeRange ? ' · ' + timeRange : ''}`
}

async function load() {
  loading.value = true
  try {
    if (!isManager.value) {
      personal.value = (await http.get('/exams/my-schedule')).data
      return
    }
    plans.value = (await http.get('/exams/plans')).data
    const plan = plans.value.find((x) => x.id === selected.value?.id)
      ?? plans.value.find((x) => x.termIsCurrent)
      ?? plans.value[0]
    if (plan) await selectPlan(plan.id)
  } catch (error) { ElMessage.error(apiErrorMessage(error)) }
  finally { loading.value = false }
}
async function selectPlan(id: string) {
  selected.value = (await http.get(`/exams/plans/${id}`)).data
  selectedSessionIds.value = []
  await loadPlanResources(selected.value.academicTermId)
}
async function loadPlanResources(academicTermId: string) {
  const [taskRes, slotRes] = await Promise.all([
    http.get('/teaching-tasks/options', {
      params: { academicTermId, status: 'Published' },
    }),
    http.get('/exams/time-slots-for-term', { params: { academicTermId } }),
  ])
  tasks.value = taskRes.data
  timeSlots.value = slotRes.data
}
function openPlan() {
  Object.assign(planForm, {
    academicTermId: defaultAcademicTermId(terms.value),
    name: '', notes: '',
  })
  planDialog.value = true
}
async function savePlan() {
  try {
    await http.post('/exams/plans', planForm)
    planDialog.value = false
    await load()
  } catch (error) { ElMessage.error(apiErrorMessage(error)) }
}
function openSession(existing?: any) {
  editingSession.value = existing ?? null
  selectedTaskIds.value = existing ? [existing.teachingTaskId] : []
  Object.assign(taskFilter, { keyword: '', collegeId: '', courseNature: '' })
  const firstSlot = timeSlots.value[0]
  Object.assign(sessionForm, {
    teachingTaskId: existing?.teachingTaskId ?? undefined,
    classroomId: existing?.classroomId ?? undefined,
    examDate: existing?.examDate ?? '',
    startPeriod: existing?.startPeriod ?? (firstSlot?.periodNumber ?? 1),
    periodCount: existing?.periodCount ?? 2,
    requiredBuildingId: existing?.requiredBuildingId ?? undefined,
    requiredInvigilatorCount: existing?.requiredInvigilatorCount ?? 2,
    invigilatorIds: existing?.invigilatorIds ?? [],
    notes: existing?.notes ?? '',
  })
  sessionDialog.value = true
}
async function saveSession() {
  try {
    const payload = { ...sessionForm }
    if (editingSession.value) {
      await http.put(`/exams/plans/${selected.value.id}/sessions/${editingSession.value.id}`, payload)
    } else {
      if (selectedTaskIds.value.length === 0) {
        ElMessage.warning('请至少选择一个教学班')
        return
      }
      const res = await http.post(`/exams/plans/${selected.value.id}/sessions/batch`, {
        teachingTaskIds: selectedTaskIds.value,
        examDate: payload.examDate,
        startPeriod: payload.startPeriod,
        periodCount: payload.periodCount,
        requiredBuildingId: payload.requiredBuildingId,
        requiredInvigilatorCount: payload.requiredInvigilatorCount,
        notes: payload.notes,
      })
      ElMessage.success(`已批量创建 ${res.data.createdCount} 个考试场次`)
    }
    sessionDialog.value = false
    editingSession.value = null
    await selectPlan(selected.value.id)
  } catch (error) { ElMessage.error(apiErrorMessage(error)) }
}
async function removeSession(row: any) {
  try {
    await ElMessageBox.confirm(`移除"${row.courseName}"考试场次？`, '移除场次', { type: 'warning' })
    await http.delete(`/exams/plans/${selected.value.id}/sessions/${row.id}`)
    await selectPlan(selected.value.id)
  } catch (error: any) {
    if (error !== 'cancel' && error !== 'close') ElMessage.error(apiErrorMessage(error))
  }
}
function selectFilteredTasks() {
  selectedTaskIds.value = Array.from(new Set([
    ...selectedTaskIds.value,
    ...filteredTasks.value.map((task: any) => task.id),
  ])).slice(0, 100)
}
function clearFilteredTasks() {
  const visibleIds = new Set(filteredTasks.value.map((task: any) => task.id))
  selectedTaskIds.value = selectedTaskIds.value.filter(id => !visibleIds.has(id))
}
function toggleTaskSelection(id: string, checked: boolean) {
  if (checked && selectedTaskIds.value.length >= 100) {
    ElMessage.warning('一次最多选择100个教学班')
    return
  }
  selectedTaskIds.value = checked
    ? Array.from(new Set([...selectedTaskIds.value, id]))
    : selectedTaskIds.value.filter(value => value !== id)
}
function selectFilteredSessions() {
  selectedSessionIds.value = filteredSessions.value.map((session: any) => session.id)
}
function clearSessionSelection() {
  selectedSessionIds.value = []
}
function toggleSessionSelection(id: string, checked: boolean) {
  selectedSessionIds.value = checked
    ? Array.from(new Set([...selectedSessionIds.value, id]))
    : selectedSessionIds.value.filter(value => value !== id)
}
async function autoArrange(mode: 'rooms' | 'invigilators' | 'all') {
  try {
    const target = selectedSessionIds.value.length
      ? `所选 ${selectedSessionIds.value.length} 个场次`
      : '当前计划全部场次'
    const action = mode === 'rooms' ? '分配考场'
      : mode === 'invigilators' ? '分配监考教师' : '分配考场和监考教师'
    await ElMessageBox.confirm(
      `系统将为${target}${action}，已有安排不会被覆盖。`,
      `一键${action}`, { type: 'info', confirmButtonText: '开始分配' })
    arrangeLoading.value = true
    const res = await http.post(`/exams/plans/${selected.value.id}/auto-arrange`, {
      sessionIds: selectedSessionIds.value,
      assignClassrooms: mode !== 'invigilators',
      assignInvigilators: mode !== 'rooms',
    })
    ElMessage.success(res.data.message)
    await selectPlan(selected.value.id)
  } catch (error: any) {
    if (error !== 'cancel' && error !== 'close') ElMessage.error(apiErrorMessage(error))
  } finally { arrangeLoading.value = false }
}
async function publishPlan() {
  try {
    await ElMessageBox.confirm('发布后考试时间、考场与监考安排将锁定。', '发布考试计划', {
      type: 'warning', confirmButtonText: '确认发布',
    })
    await http.post(`/exams/plans/${selected.value.id}/publish`)
    await load()
  } catch (error: any) {
    if (error !== 'cancel' && error !== 'close') ElMessage.error(apiErrorMessage(error))
  }
}
async function exportSignInSheets() {
  if (!selected.value) return
  exportLoading.value = true
  try {
    await downloadApiFile(
      `/exams/plans/${selected.value.id}/sign-in-sheets.xlsx`,
      `考场签名单-${selected.value.name}.xlsx`,
    )
    ElMessage.success('考场签名单已导出')
  } catch (error) {
    ElMessage.error(apiErrorMessage(error))
  } finally {
    exportLoading.value = false
  }
}
async function showRoster(row: any) {
  try {
    roster.value = (await http.get(`/exams/sessions/${row.id}/roster`)).data
    rosterDrawer.value = true
  } catch (error) { ElMessage.error(apiErrorMessage(error)) }
}
function periodOptions() {
  const max = timeSlots.value.length > 0 ? timeSlots.value[timeSlots.value.length - 1].periodNumber : 12
  return Array.from({ length: max }, (_, i) => ({ value: i + 1, label: `第 ${i + 1} 节` }))
}
function periodCountOptions() {
  return [1, 2, 3, 4].map(n => ({ value: n, label: `${n} 小节` }))
}
function classroomLabel(room: any) {
  return `${room.name} · ${room.capacity}座 · ${room.buildingName}`
}
function filteredRooms() {
  if (!sessionForm.requiredBuildingId) return rooms.value
  return rooms.value.filter((r: any) => r.buildingId === sessionForm.requiredBuildingId)
}

onMounted(async () => {
  try {
    if (isManager.value) {
      const [termRes, roomRes, teacherRes, buildingRes] = await Promise.all([
        http.get('/base-data/terms'),
        http.get('/base-data/classrooms'),
        http.get('/personnel/teachers', { params: { page: 1, pageSize: 200, teacherStatus: 'Active' } }),
        http.get('/base-data/buildings'),
      ])
      terms.value = termRes.data
      rooms.value = roomRes.data
      teachers.value = teacherRes.data.items
      buildings.value = buildingRes.data
    }
    await load()
  } catch (error) { ElMessage.error(apiErrorMessage(error)) }
})
</script>

<template>
  <div class="page-stack exam-page">
    <section class="page-intro">
      <div>
        <span class="section-kicker">EXAMINATION OFFICE</span>
        <h2>{{ isManager ? '考试安排与考场' : isTeacher ? '我的监考' : '我的考试' }}</h2>
        <p>{{ isManager ? '基于课表节次安排考试，自动匹配考场与监考教师。' : '查看学校已经正式发布的考试日程。' }}</p>
      </div>
      <el-button v-if="isManager" type="primary" :icon="Plus" @click="openPlan">新建考试计划</el-button>
      <el-button v-else :icon="Refresh" @click="load">刷新日程</el-button>
    </section>

    <template v-if="isManager">
      <section class="exam-plan-strip">
        <button v-for="plan in plans" :key="plan.id" :class="{ active: selected?.id === plan.id, 'historical-record': !plan.termIsCurrent && !plan.termIsArchived, 'archived-record': plan.termIsArchived }" @click="selectPlan(plan.id)">
          <span>{{ plan.termName }}</span><b>{{ plan.name }}</b>
          <small>{{ plan.sessionCount }} 个场次</small><i>{{ statusLabels[plan.status] }}</i>
        </button>
      </section>
      <section v-if="selected" class="exam-board" v-loading="loading">
        <header>
          <div>
            <span>EXAM TIMELINE</span>
            <h3>{{ selected.name }}</h3>
            <p>{{ selected.termName }} · {{ selected.sessions.length }} 个考试场次</p>
          </div>
          <div class="exam-actions">
            <el-button
              :icon="Download"
              :loading="exportLoading"
              :disabled="selected.sessions.length === 0"
              @click="exportSignInSheets"
            >导出考场签名单</el-button>
            <el-button v-if="selected.status === 'Draft'" @click="autoArrange('rooms')" :loading="arrangeLoading">一键分配考场</el-button>
            <el-button v-if="selected.status === 'Draft'" @click="autoArrange('invigilators')" :loading="arrangeLoading">一键分配监考</el-button>
            <el-button v-if="selected.status === 'Draft'" :icon="Setting" @click="autoArrange('all')" :loading="arrangeLoading">一键完成</el-button>
            <el-button v-if="selected.status === 'Draft'" :icon="Plus" @click="openSession()">批量安排场次</el-button>
            <el-button v-if="selected.status === 'Draft'" type="primary" :icon="Promotion" @click="publishPlan">发布计划</el-button>
          </div>
        </header>
        <div class="exam-filter-bar">
          <el-input v-model="sessionFilter.keyword" clearable placeholder="筛选课程、课程号或教学班号" />
          <el-select v-model="sessionFilter.allocation" clearable placeholder="全部分配状态">
            <el-option label="待分配考场" value="room" />
            <el-option label="待补足监考" value="invigilator" />
            <el-option label="已完成分配" value="complete" />
          </el-select>
          <span>显示 {{ filteredSessions.length }}/{{ selected.sessions.length }} 个场次</span>
          <template v-if="selected.status === 'Draft'">
            <el-button link type="primary" @click="selectFilteredSessions">选择筛选结果</el-button>
            <el-button link @click="clearSessionSelection">清空选择</el-button>
            <el-tag v-if="selectedSessionIds.length" type="info">已选 {{ selectedSessionIds.length }} 个</el-tag>
          </template>
        </div>
        <div class="exam-timeline">
          <article v-for="session in filteredSessions" :key="session.id" :class="{ unassigned: !session.classroomId }">
            <time>
              <el-checkbox
                v-if="selected.status === 'Draft'"
                :model-value="selectedSessionIds.includes(session.id)"
                @change="toggleSessionSelection(session.id, Boolean($event))"
              >选择</el-checkbox>
              <b>{{ dateOnlyText(session.examDate) }}</b>
              <span>{{ periodLabel(session) }}</span>
            </time>
            <div>
              <span>{{ session.courseCode }} · {{ session.taskNumber }}</span>
              <h4>{{ session.courseName }}</h4>
              <p>
                <template v-if="session.classroomId">{{ session.buildingName }} · {{ session.classroomName }} · {{ session.classroomCapacity }}座</template>
                <template v-else><el-tag size="small" type="warning">待分配考场</el-tag></template>
                · {{ session.studentCount }} 人
                <template v-if="session.requiredBuildingName"> · 限{{ session.requiredBuildingName }}</template>
                <template v-if="session.requiredInvigilatorCount > 1"> · {{ session.requiredInvigilatorCount }}名监考</template>
              </p>
            </div>
            <div class="exam-staff">
              <span>监考</span>
              <b>{{ session.invigilatorNames.length ? session.invigilatorNames.join('、') : '待分配' }}</b>
              <small>{{ timeText(session.startsAt) }}—{{ timeText(session.endsAt) }}</small>
            </div>
            <div class="exam-row-actions">
              <el-button link type="primary" @click="showRoster(session)">考生名单</el-button>
              <el-button v-if="selected.status === 'Draft'" link type="primary" @click="openSession(session)">编辑</el-button>
              <el-button v-if="selected.status === 'Draft'" link type="danger" @click="removeSession(session)">移除</el-button>
            </div>
          </article>
          <el-empty v-if="!selected.sessions.length" description="尚未安排考试场次，点击「批量安排场次」开始。" />
          <el-empty v-else-if="!filteredSessions.length" description="没有符合筛选条件的考试场次" />
        </div>
      </section>
    </template>

    <section v-else class="exam-ticket-grid" v-loading="loading">
      <article v-for="item in personal" :key="item.id">
        <div class="exam-ticket-date">
          <b>{{ dateOnlyText(item.examDate) }}</b>
          <span>{{ timeText(item.startsAt) }}—{{ timeText(item.endsAt) }}</span>
        </div>
        <div>
          <span>{{ item.courseCode }} · {{ item.taskNumber }}</span>
          <h3>{{ item.courseName }}</h3>
          <p>{{ item.buildingName ? `${item.buildingName} · ${item.classroomName}` : '考场待定' }}</p>
          <el-tag v-if="!isTeacher && item.seatNumber" size="small" type="success">座位号 {{ item.seatNumber }}</el-tag>
        </div>
        <footer>
          <el-icon><UserFilled /></el-icon>
          {{ isTeacher ? `${item.studentCount} 名考生` : `监考：${item.invigilatorNames.join('、') || '待定'}` }}
        </footer>
      </article>
      <el-empty v-if="!personal.length" description="暂无已发布考试安排" />
    </section>

    <!-- Plan Dialog -->
    <el-dialog v-model="planDialog" title="新建考试计划" width="600px">
      <el-form label-position="top">
        <el-form-item label="学期">
          <el-select v-model="planForm.academicTermId">
            <el-option v-for="x in terms" :key="x.id" :label="academicTermLabel(x)" :value="x.id" :class="academicTermOptionClass(x)" />
          </el-select>
        </el-form-item>
        <el-form-item label="计划名称"><el-input v-model="planForm.name" maxlength="120" /></el-form-item>
        <el-form-item label="说明"><el-input v-model="planForm.notes" type="textarea" maxlength="500" /></el-form-item>
      </el-form>
      <template #footer>
        <el-button @click="planDialog = false">取消</el-button>
        <el-button type="primary" @click="savePlan">保存草稿</el-button>
      </template>
    </el-dialog>

    <!-- Session Dialog -->
    <el-dialog v-model="sessionDialog" :title="editingSession ? '编辑考试场次' : '批量安排考试场次'" width="960px" top="3vh">
      <el-form label-position="top">
        <el-form-item v-if="editingSession" label="教学班">
          <el-select v-model="sessionForm.teachingTaskId" filterable placeholder="选择教学班">
            <el-option v-for="x in tasks" :key="x.id" :label="`${x.taskNumber} · ${x.courseName}`" :value="x.id" />
          </el-select>
        </el-form-item>
        <template v-else>
          <div class="task-filter-grid">
            <el-input v-model="taskFilter.keyword" clearable placeholder="课程、教学班、教师或行政班" />
            <el-select v-model="taskFilter.collegeId" clearable placeholder="全部开课单位">
              <el-option v-for="x in taskColleges" :key="x.id" :label="x.name" :value="x.id" />
            </el-select>
            <el-select v-model="taskFilter.courseNature" clearable placeholder="全部课程性质">
              <el-option v-for="(label, value) in courseNatureLabels" :key="value" :label="label" :value="value" />
            </el-select>
          </div>
          <div class="task-selection-actions">
            <span>可选 {{ filteredTasks.length }} 个，已选 {{ selectedTaskIds.length }} 个</span>
            <el-button link type="primary" @click="selectFilteredTasks">选择全部筛选结果</el-button>
            <el-button link @click="clearFilteredTasks">清除筛选结果选择</el-button>
          </div>
          <el-table :data="filteredTasks" height="260" size="small">
            <el-table-column label="选择" width="64">
              <template #default="scope">
                <el-checkbox
                  :model-value="selectedTaskIds.includes(scope.row.id)"
                  @click.stop
                  @update:model-value="toggleTaskSelection(scope.row.id, Boolean($event))"
                />
              </template>
            </el-table-column>
            <el-table-column prop="taskNumber" label="教学班号" width="130" />
            <el-table-column prop="courseName" label="课程" min-width="150" />
            <el-table-column prop="collegeName" label="开课单位" min-width="130" />
            <el-table-column label="任课教师" min-width="120">
              <template #default="scope">{{ scope.row.teacherNames?.join('、') || '待定' }}</template>
            </el-table-column>
            <el-table-column label="行政班" min-width="150">
              <template #default="scope">{{ scope.row.classNames?.join('、') || '-' }}</template>
            </el-table-column>
          </el-table>
        </template>
        <div class="form-grid">
          <el-form-item label="考试日期">
            <el-date-picker v-model="sessionForm.examDate" type="date" value-format="YYYY-MM-DD" placeholder="选择日期" />
          </el-form-item>
          <el-form-item label="起始节次">
            <el-select v-model="sessionForm.startPeriod">
              <el-option v-for="opt in periodOptions()" :key="opt.value" :label="opt.label" :value="opt.value" />
            </el-select>
          </el-form-item>
          <el-form-item label="持续节数">
            <el-select v-model="sessionForm.periodCount">
              <el-option v-for="opt in periodCountOptions()" :key="opt.value" :label="opt.label" :value="opt.value" />
            </el-select>
          </el-form-item>
        </div>
        <div class="form-grid">
          <el-form-item label="教学楼限制">
            <el-select v-model="sessionForm.requiredBuildingId" clearable placeholder="不限教学楼">
              <el-option v-for="x in buildings" :key="x.id" :label="x.name" :value="x.id" />
            </el-select>
          </el-form-item>
          <el-form-item label="监考人数">
            <el-input-number v-model="sessionForm.requiredInvigilatorCount" :min="1" :max="10" />
          </el-form-item>
        </div>
        <el-form-item v-if="editingSession" label="考场（可留空，由自动编排分配）">
          <el-select v-model="sessionForm.classroomId" clearable filterable placeholder="留空由自动编排分配">
            <el-option v-for="x in filteredRooms()" :key="x.id" :label="classroomLabel(x)" :value="x.id" />
          </el-select>
        </el-form-item>
        <el-form-item v-if="editingSession" label="监考教师（可留空，由自动编排分配）">
          <el-select v-model="sessionForm.invigilatorIds" multiple filterable clearable placeholder="留空由自动编排分配">
            <el-option v-for="x in teachers" :key="x.id" :label="`${x.teacherNumber} · ${x.name}`" :value="x.id" />
          </el-select>
        </el-form-item>
        <el-form-item label="备注">
          <el-input v-model="sessionForm.notes" maxlength="500" placeholder="可选" />
        </el-form-item>
      </el-form>
      <template #footer>
        <el-button @click="sessionDialog = false">取消</el-button>
        <el-button type="primary" @click="saveSession">
          {{ editingSession ? '保存修改' : `批量创建 ${selectedTaskIds.length} 个场次` }}
        </el-button>
      </template>
    </el-dialog>

    <!-- Roster Drawer -->
    <el-drawer v-model="rosterDrawer" title="考生名单" size="560px">
      <el-table v-if="roster" :data="roster.students">
        <el-table-column prop="seatNumber" label="座位号" width="80" />
        <el-table-column prop="studentNumber" label="学号" width="130" />
        <el-table-column prop="name" label="姓名" width="90" />
        <el-table-column prop="className" label="行政班" />
      </el-table>
    </el-drawer>
  </div>
</template>

<style scoped>
.exam-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.exam-filter-bar,
.task-filter-grid,
.task-selection-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.exam-filter-bar {
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.exam-filter-bar .el-input {
  width: min(320px, 100%);
}
.exam-filter-bar .el-select {
  width: 180px;
}
.task-filter-grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) minmax(160px, 1fr) minmax(160px, 1fr);
  margin-bottom: 10px;
}
.task-selection-actions {
  justify-content: flex-end;
  margin-bottom: 8px;
}
.task-selection-actions span {
  margin-right: auto;
}
.exam-timeline article.unassigned {
  border-left-color: #e6a23c;
}
@media (max-width: 720px) {
  .exam-actions {
    justify-content: flex-start;
  }
  .task-filter-grid {
    grid-template-columns: 1fr;
  }
  .task-selection-actions {
    align-items: flex-start;
    flex-direction: column;
  }
}
</style>
