<template>
  <div>
    <!-- 统计区 -->
    <el-row :gutter="16" style="margin-bottom:20px">
      <el-col :span="4"><el-card shadow="hover"><div style="text-align:center;padding:8px"><div style="color:#909399;font-size:12px">未处理</div><div style="font-size:24px;font-weight:bold;color:#e6a23c">{{ stats.unresolved }}</div></div></el-card></el-col>
      <el-col :span="4"><el-card shadow="hover"><div style="text-align:center;padding:8px"><div style="color:#909399;font-size:12px">采集失败</div><div style="font-size:24px;font-weight:bold">{{ stats.collectFail }}</div></div></el-card></el-col>
      <el-col :span="4"><el-card shadow="hover"><div style="text-align:center;padding:8px"><div style="color:#909399;font-size:12px">设备离线</div><div style="font-size:24px;font-weight:bold">{{ stats.deviceOffline }}</div></div></el-card></el-col>
      <el-col :span="4"><el-card shadow="hover"><div style="text-align:center;padding:8px"><div style="color:#909399;font-size:12px">产量异常</div><div style="font-size:24px;font-weight:bold">{{ stats.productionAnomaly }}</div></div></el-card></el-col>
      <el-col :span="4"><el-card shadow="hover"><div style="text-align:center;padding:8px"><div style="color:#909399;font-size:12px">未知设备</div><div style="font-size:24px;font-weight:bold">{{ stats.unknownDevice }}</div></div></el-card></el-col>
    </el-row>

    <!-- 查询条件 -->
    <el-form :inline="true" class="mb-16">
      <el-form-item label="告警类型">
        <el-select v-model="query.alertType" clearable placeholder="全部">
          <el-option label="采集失败" value="collect_fail" />
          <el-option label="设备离线" value="device_offline" />
          <el-option label="产量异常" value="production_anomaly" />
          <el-option label="未知设备" value="unknown_device" />
          <el-option label="服务错误" value="service_error" />
        </el-select>
      </el-form-item>
      <el-form-item label="处理状态">
        <el-select v-model="query.isResolved" clearable placeholder="全部">
          <el-option label="未处理" :value="0" />
          <el-option label="已处理" :value="1" />
        </el-select>
      </el-form-item>
      <el-form-item label="时间范围">
        <el-date-picker v-model="query.dateRange" type="daterange" value-format="YYYY-MM-DD" clearable />
      </el-form-item>
      <el-form-item label="机床">
        <el-select v-model="query.machineId" filterable clearable placeholder="全部">
          <el-option v-for="m in machineList" :key="m.id" :label="m.name" :value="m.id" />
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-input v-model="query.keyword" placeholder="标题/详情" clearable />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="loadData">查询</el-button>
        <el-button @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <!-- 操作栏 -->
    <div style="margin-bottom:12px">
      <el-button type="primary" @click="batchResolve" :disabled="!selectedRows.length || !selectedRows.some((r: Alert) => !r.isResolved)">批量标记已处理</el-button>
    </div>

    <!-- 列表 -->
    <el-table :data="tableData" border stripe v-loading="loading" @selection-change="(rows: Alert[]) => selectedRows = rows">
      <el-table-column type="selection" width="50" fixed="left" align="center" />
      <el-table-column prop="createdAt" label="告警时间" sortable />
      <el-table-column label="告警类型" align="center">
        <template #default="{ row }">
          <el-tag :type="alertTypeTag(row.alertType)" size="small">{{ alertTypeLabel(row.alertType) }}</el-tag>
        </template>
      </el-table-column>
      <el-table-column prop="title" label="标题" show-overflow-tooltip />
      <el-table-column prop="machineName" label="机床" show-overflow-tooltip align="center" />
      <el-table-column prop="detail" label="详情" show-overflow-tooltip />
      <el-table-column label="处理状态" align="center">
        <template #default="{ row }">
          <el-tag :type="row.isResolved ? 'success' : 'danger'" size="small">{{ row.isResolved ? '已处理' : '未处理' }}</el-tag>
        </template>
      </el-table-column>
      <el-table-column label="操作" width="120" fixed="right" align="center">
        <template #default="{ row }">
          <div style="white-space:nowrap">
            <el-button v-if="!row.isResolved" link type="primary" @click="handleResolve(row)">标记已处理</el-button>
            <el-button v-else link type="primary" @click="viewDetail(row)">查看</el-button>
          </div>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页 -->
    <el-pagination
      v-model:current-page="page.page"
      v-model:page-size="page.pageSize"
      :page-sizes="[20, 50, 100]"
      :total="page.total"
      background
      layout="total, sizes, prev, pager, next, jumper"
    />

    <!-- 告警详情弹窗 -->
    <el-dialog v-model="detailVisible" title="告警详情" width="600px" destroy-on-close>
      <el-descriptions :column="1" border size="small">
        <el-descriptions-item label="告警时间">{{ detailRow.createdAt }}</el-descriptions-item>
        <el-descriptions-item label="告警类型">
          <el-tag :type="alertTypeTag(detailRow.alertType)" size="small">{{ alertTypeLabel(detailRow.alertType) }}</el-tag>
        </el-descriptions-item>
        <el-descriptions-item label="标题">{{ detailRow.title }}</el-descriptions-item>
        <el-descriptions-item label="机床">{{ detailRow.machineName || '-' }}</el-descriptions-item>
        <el-descriptions-item label="详情">{{ detailRow.detail }}</el-descriptions-item>
        <el-descriptions-item label="处理状态">
          <el-tag :type="detailRow.isResolved ? 'success' : 'danger'" size="small">{{ detailRow.isResolved ? '已处理' : '未处理' }}</el-tag>
        </el-descriptions-item>
        <el-descriptions-item label="处理时间">{{ detailRow.resolvedAt || '-' }}</el-descriptions-item>
      </el-descriptions>
      <template #footer><el-button @click="detailVisible = false">关闭</el-button></template>
    </el-dialog>
  </div>
</template>

<script setup lang="ts">
import { ref, reactive, onMounted } from 'vue'
import { ElMessage, ElMessageBox } from 'element-plus'
import request from '@/utils/request'
import type { ApiResponse, Alert, Machine } from '@/types'

/** 告警统计信息 */
interface AlertStats {
  unresolved: number
  collectFail: number
  deviceOffline: number
  productionAnomaly: number
  unknownDevice: number
}

const loading = ref(false)
const tableData = ref<Alert[]>([])
const selectedRows = ref<Alert[]>([])
const stats = ref<AlertStats>({} as AlertStats)
const machineList = ref<Machine[]>([])
const detailVisible = ref(false)
const detailRow = ref<Alert>({} as Alert)

const query = reactive({
  alertType: '',
  isResolved: 0 as number | undefined,
  dateRange: null as string[] | null,
  machineId: undefined as number | undefined,
  keyword: '',
})

const page = reactive({ page: 1, pageSize: 20, total: 0 })

// 告警类型标签映射
function alertTypeTag(type: string): string {
  const map: Record<string, string> = {
    collect_fail: 'warning',
    device_offline: 'danger',
    production_anomaly: 'warning',
    unknown_device: 'info',
    service_error: 'danger',
  }
  return map[type] || 'info'
}

function alertTypeLabel(type: string): string {
  const map: Record<string, string> = {
    collect_fail: '采集失败',
    device_offline: '设备离线',
    production_anomaly: '产量异常',
    unknown_device: '未知设备',
    service_error: '服务错误',
  }
  return map[type] || type
}

async function loadData() {
  loading.value = true
  try {
    const [s, d] = await Promise.all([
      request.get<AlertStats>('/admin/alert/statistics'),
      request.get<{ items: Alert[]; total: number }>('/admin/alert', { params: { ...query, ...page } }),
    ])
    stats.value = s.data || {} as AlertStats
    tableData.value = d.data?.items || []
    page.total = d.data?.total || 0
  } finally {
    loading.value = false
  }
}

function resetQuery() {
  Object.assign(query, { alertType: '', isResolved: 0, dateRange: null, machineId: undefined, keyword: '' })
  loadData()
}

async function handleResolve(row: Alert) {
  await ElMessageBox.confirm('确定标记为已处理？', '提示', { type: 'warning' })
  await request.post('/admin/alert/resolve', { id: row.id })
  ElMessage.success('已标记为已处理')
  loadData()
}

async function batchResolve() {
  const unresolved = selectedRows.value.filter((r: Alert) => !r.isResolved)
  await ElMessageBox.confirm(`确定对选中的${unresolved.length}项标记为已处理？`, '提示', { type: 'warning' })
  await request.post('/admin/alert/batch-resolve', { ids: unresolved.map((r: Alert) => r.id) })
  ElMessage.success('批量标记成功')
  loadData()
}

function viewDetail(row: Alert) {
  detailRow.value = row
  detailVisible.value = true
}

async function loadDrops() {
  const r = await request.get<{ items: Machine[] }>('/admin/machine/list')
  machineList.value = r.data?.items || []
}

onMounted(() => {
  loadData()
  loadDrops()
})
</script>
