<script setup lang="ts">
import { onMounted, ref } from 'vue'

import AdminPageHeader from '@/components/admin/AdminPageHeader.vue'
import { fetchAdminDashboardSummary } from '@/services/admin'
import type { AdminDashboardSummary } from '@/types/admin'

const loading = ref(true)
const summary = ref<AdminDashboardSummary | null>(null)
const errorMessage = ref('')

onMounted(async () => {
  try {
    const response = await fetchAdminDashboardSummary()
    summary.value = response.data
  } catch (error) {
    errorMessage.value = error instanceof Error ? error.message : '读取概览失败'
  } finally {
    loading.value = false
  }
})

const cards = [
  { key: 'todayOrders', label: '今日订单' },
  { key: 'paidPendingClaim', label: '待领取' },
  { key: 'claimingTasks', label: '领取中' },
  { key: 'redeemedToday', label: '今日成功' },
  { key: 'abnormalTasks', label: '异常任务' },
] as const
</script>

<template>
  <div class="dashboard-page">
    <AdminPageHeader title="系统概览" description="快速查看订单和交付链路的运行状态。" />

    <el-alert
      v-if="errorMessage"
      :title="errorMessage"
      type="error"
      show-icon
      :closable="false"
      class="mt-4"
    />

    <el-skeleton v-if="loading" :rows="12" animated class="mt-4" />

    <div v-else class="summary-grid">
      <el-card v-for="card in cards" :key="card.key" shadow="never" class="stat-card">
        <span class="stat-label">{{ card.label }}</span>
        <strong class="stat-value">{{ summary?.[card.key] ?? 0 }}</strong>
      </el-card>
    </div>
  </div>
</template>

<style scoped>
.dashboard-page {
  display: grid;
  gap: 0;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.stat-card {
  text-align: left;
}

.stat-label {
  display: block;
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.stat-value {
  display: block;
  margin-top: 10px;
  font-size: var(--text-3xl);
  color: var(--text-primary);
}

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