hjc-web/app/templates/template-07/pages/ProductList.vue

<template>
  <div class="min-h-screen py-16 bg-gray-50">
    <div class="container mx-auto px-4 sm:px-6 lg:px-8">
      <div class="text-center mb-12">
        <h1 class="text-3xl font-bold text-gray-900 mb-4">产品中心</h1>
        <p class="text-gray-600 max-w-2xl mx-auto">为企业提供全方位的数字化解决方案</p>
      </div>

      <div v-if="pending" class="flex justify-center py-12">
        <SiteLoading />
      </div>
      <SiteError v-else-if="error" message="获取产品列表失败" />

      <div v-else class="grid sm:grid-cols-2 lg:grid-cols-3 gap-6">
        <article
          v-for="item in products"
          :key="item.id ?? item.productId"
          class="bg-white rounded-xl overflow-hidden shadow-sm hover:shadow-md transition-shadow"
        >
          <div class="aspect-video bg-gray-100 flex items-center justify-center">
            <img
              v-if="item.cover"
              :src="fileUrl(item.cover)"
              :alt="item.productName"
              class="w-full h-full object-cover"
            >
            <span v-else class="text-gray-400">暂无图片</span>
          </div>
          <div class="p-5">
            <h2 class="text-lg font-semibold text-gray-900 mb-2 hover:text-blue-600 transition-colors">
              <NuxtLink :to="`/product/${item.id ?? item.productId}`">{{ item.productName }}</NuxtLink>
            </h2>
            <p class="text-sm text-gray-600 line-clamp-2 mb-4">{{ stripHtml(item.description || item.subtitle) }}</p>
            <div class="flex items-center justify-between">
              <span v-if="item.price" class="text-lg font-bold text-blue-600">{{ item.price }}</span>
              <NuxtLink
                :to="`/product/${item.id ?? item.productId}`"
                class="text-sm text-blue-600 hover:text-blue-700 font-medium"
              >
                了解详情 →
              </NuxtLink>
            </div>
          </div>
        </article>
      </div>

      <!-- 分页 -->
      <div v-if="totalPages > 1" class="flex justify-center mt-12">
        <nav class="flex items-center gap-2">
          <button
            v-for="p in totalPages"
            :key="p"
            class="px-4 py-2 text-sm rounded-lg transition-colors"
            :class="p === currentPage ? 'bg-blue-600 text-white' : 'bg-white text-gray-700 hover:bg-blue-50'"
            @click="currentPage = p"
          >
            {{ p }}
          </button>
        </nav>
      </div>
    </div>
  </div>
</template>

<script setup lang="ts">
import type { Product, PageResult, ApiEnvelope } from '~/types'
import { collectDescendantNavIds } from '~/utils/nav-tree'

/**
 * 产品列表页
 */
const { fileUrl } = useFileUrl()
const { allNavigations, fetchSiteInfo } = useSite()
const route = useRoute()

await fetchSiteInfo()

/**
 * 栏目 navigationId：从查询参数或路由参数读取。
 * 优先级（2026-07-21 修正）：route.query.navId > route.params.id
 * （子分类下拉切换通过 ?navId= 传入，必须优先于路径参数，否则切换不生效）
 */
const navigationId = computed<number | undefined>(() => {
  // 1. 查询参数优先（导航子分类下拉切换时传入）
  const qid = route.query.navId as string
  if (qid) {
    const n = Number(qid)
    if (!Number.isNaN(n)) return n
  }
  // 2. 路由参数（/product/:navigationId）
  const pid = route.params.id as string
  if (pid) {
    const n = Number(pid)
    if (!Number.isNaN(n)) return n
  }
  return undefined
})

// 聚合：父栏目访问时递归收集自身 + 所有后代栏目 navigationId，交给后端 IN 查询
const categoryIds = computed<string | undefined>(() => {
  const ids = collectDescendantNavIds(navigationId.value, allNavigations.value || [])
  return ids.length ? ids.join(',') : undefined
})

const currentPage = ref(1)
const limit = 12

const { data, pending, error } = await useFetch<
  ApiEnvelope<PageResult<Product>> | PageResult<Product>
>('/api/product/list', {
  key: `product-list-${categoryIds.value ?? navigationId.value ?? 'all'}-p${currentPage.value}`,
  query: {
    page: currentPage,
    limit,
    ...(categoryIds.value
      ? { categoryIds: categoryIds.value }
      : (navigationId.value ? { navigationId: navigationId.value } : {}))
  },
  watch: [currentPage, categoryIds, navigationId]
})

const products = computed<Product[]>(() => {
  const envelope = data.value as ApiEnvelope<PageResult<Product>>
  const direct = data.value as PageResult<Product>
  return envelope?.data?.list || direct?.list || []
})

const totalCount = computed(() => {
  const envelope = data.value as ApiEnvelope<PageResult<Product>>
  const direct = data.value as PageResult<Product>
  return envelope?.data?.count || envelope?.data?.total || direct?.count || direct?.total || 0
})
const totalPages = computed(() => Math.max(1, Math.ceil(totalCount.value / limit)))

// 切换栏目时回到第 1 页
watch([categoryIds, navigationId], () => {
  currentPage.value = 1
})
</script>