feat(支付): 添加微信支付流程及状态管理

在CheckoutPage.vue中添加了微信支付的完整流程，包括支付初始化、支付状态检查、支付结果处理等功能。同时引入了支付状态管理，支持处理中、成功、失败等状态的展示和交互。优化了表单提交逻辑，确保支付流程的完整性和用户体验。

@@ -16,7 +16,7 @@
       </FrostedGlass>
     </div>
 
-    <div v-else-if="orderComplete" class="h-screen flex flex-col items-center justify-center px-4">
+    <div v-else-if="orderComplete || paymentStatus === 'success'" class="h-screen flex flex-col items-center justify-center px-4">
       <FrostedGlass class="p-6 rounded-xl text-center">
         <div class="w-20 h-20 bg-green-100 rounded-full flex items-center justify-center mx-auto mb-4">
           <svg xmlns="http://www.w3.org/2000/svg" class="h-10 w-10 text-green-500" fill="none" viewBox="0 0 24 24" stroke="currentColor">
@@ -35,6 +35,42 @@
       </FrostedGlass>
     </div>
 
+    <!-- 支付状态提示 -->
+    <div v-else-if="paymentStatus === 'processing'" class="h-screen flex flex-col items-center justify-center px-4">
+      <FrostedGlass class="p-6 rounded-xl text-center">
+        <div class="w-20 h-20 bg-blue-50 rounded-full flex items-center justify-center mx-auto mb-4">
+          <div class="w-10 h-10 border-4 border-blue-500 border-t-transparent rounded-full animate-spin"></div>
+        </div>
+        <h2 class="text-2xl font-bold mb-2">支付处理中</h2>
+        <p class="text-gray-600 mb-6">请稍候，正在处理您的支付...</p>
+      </FrostedGlass>
+    </div>
+
+    <!-- 支付失败提示 -->
+    <div v-else-if="paymentStatus === 'failed'" class="h-screen flex flex-col items-center justify-center px-4">
+      <FrostedGlass class="p-6 rounded-xl text-center">
+        <div class="w-20 h-20 bg-red-50 rounded-full flex items-center justify-center mx-auto mb-4">
+          <svg xmlns="http://www.w3.org/2000/svg" class="h-10 w-10 text-red-500" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
+          </svg>
+        </div>
+        <h2 class="text-2xl font-bold mb-2">支付失败</h2>
+        <p class="text-gray-600 mb-6">{{ paymentError || '支付过程中出现错误，请重试' }}</p>
+        <button
+          @click="handleSubmit"
+          class="w-full bg-gradient-to-r from-red-500 to-red-600 text-white py-3 rounded-xl font-medium mb-3"
+        >
+          重新支付
+        </button>
+        <button
+          @click="handleBackToHome"
+          class="w-full bg-gray-100 text-gray-700 py-3 rounded-xl font-medium"
+        >
+          返回首页
+        </button>
+      </FrostedGlass>
+    </div>
+
     <div v-else class="pb-20">
       <!-- Order Summary -->
       <div class="p-4 bg-gradient-to-r from-green-500/10 to-blue-500/10">
@@ -142,7 +178,6 @@
                   type="text"
                   class="w-full px-3 py-2 border border-gray-200 rounded-lg text-sm"
                   placeholder="请输入您的详细地址"
-                  required
                 />
               </div>
 
@@ -276,6 +311,8 @@ import FrostedGlass from '@/components/ui/FrostedGlass.vue'
 import ConfirmDialog from '@/components/ui/ConfirmDialog.vue'
 import { useCart } from '@/contexts/cart'
 import { useTitle } from '@vueuse/core';
+import { wxPayAPI, wxPayCheckAPI } from "@/api/wx/pay";
+
 const $route = useRoute();
 const $router = useRouter();
 useTitle($route.meta.title);
@@ -292,12 +329,17 @@ const formData = ref({
   pay_type: 'WeChat'
 })
 
-// Loading and success states
+// 支付状态管理
 const isProcessing = ref(false)
 const orderComplete = ref(false)
 const orderId = ref('')
+const paymentStatus = ref('pending') // pending, processing, success, failed
+const paymentError = ref('')
+const paymentRetryCount = ref(0)
+const MAX_RETRY_ATTEMPTS = 3
+const RETRY_DELAY = 2000 // 2秒重试间隔
 
-// Confirm dialog state
+// 确认对话框状态
 const showConfirmDialog = ref(false)
 const itemToDelete = ref(null)
 
@@ -312,44 +354,130 @@ const handleImageError = (e) => {
   e.target.src = '/assets/images/course-placeholder.jpg'
 }
 
-// Handle form submission
+// 初始化微信支付
+const initWxPay = () => {
+  return new Promise((resolve) => {
+    if (typeof WeixinJSBridge !== "undefined") {
+      resolve(WeixinJSBridge);
+    } else {
+      document.addEventListener('WeixinJSBridgeReady', () => {
+        resolve(WeixinJSBridge);
+      }, false);
+    }
+  });
+}
+
+// 检查支付状态
+const checkPaymentStatus = async (orderId) => {
+  try {
+    const payStatus = await wxPayCheckAPI({ order_id: orderId });
+    if (payStatus.code) {
+      paymentStatus.value = 'success';
+      orderComplete.value = true;
+      return true;
+    }
+    return false;
+  } catch (error) {
+    console.error('支付状态查询失败:', error);
+    return false;
+  }
+}
+
+// 处理支付结果
+const handlePaymentResult = async (res) => {
+  if (res.err_msg === "get_brand_wcpay_request:ok") {
+    // 支付成功，验证支付状态
+    let retryCount = 0;
+    const verifyPayment = async () => {
+      if (await checkPaymentStatus(orderId.value)) {
+        return;
+      }
+      if (retryCount < MAX_RETRY_ATTEMPTS) {
+        retryCount++;
+        await new Promise(resolve => setTimeout(resolve, RETRY_DELAY));
+        await verifyPayment();
+      } else {
+        paymentStatus.value = 'failed';
+        paymentError.value = '支付状态验证失败，请联系客服';
+      }
+    }
+    await verifyPayment();
+  } else if (res.err_msg === "get_brand_wcpay_request:cancel") {
+    paymentStatus.value = 'failed';
+    paymentError.value = '支付已取消';
+  } else {
+    paymentStatus.value = 'failed';
+    paymentError.value = '支付失败，请重试';
+  }
+}
+
+onMounted(() => {
+  // 初始化微信支付
+  initWxPay();
+})
+
+// 处理表单提交和支付流程
 const handleSubmit = async (e) => {
   try {
+    // 重置支付状态
+    paymentStatus.value = 'pending';
+    paymentError.value = '';
+    paymentRetryCount.value = 0;
+
     // 表单验证
     if (!formData.value.receive_name?.trim()) {
-      throw new Error('请输入姓名')
+      throw new Error('请输入姓名');
     }
     if (!formData.value.receive_phone?.trim()) {
-      throw new Error('请输入手机号码')
+      throw new Error('请输入手机号码');
     }
-    // if (!formData.value.receive_address?.trim()) {
-    //   throw new Error('请输入联系地址')
-    // }
     if (!formData.value.pay_type) {
-      throw new Error('请选择支付方式')
+      throw new Error('请选择支付方式');
     }
 
-    isProcessing.value = true
+    isProcessing.value = true;
+    paymentStatus.value = 'processing';
 
-    // Process checkout
-    const result = await handleCheckout(formData.value)
+    // 创建订单
+    const result = await handleCheckout(formData.value);
+    if (!result?.success) {
+      throw new Error(result?.message || '订单创建失败，请重试');
+    }
 
-    if (!result) {
-      throw new Error('支付处理失败，请重试')
+    orderId.value = result.orderId || '';
+    if (!orderId.value) {
+      throw new Error('订单号获取失败，请重试');
     }
 
-    if (result.success) {
-      orderId.value = result.orderId || ''
-      orderComplete.value = true
-      // TODO: 生成orderid, 并跳转到支付页面
-    } else {
-      throw new Error(result.message || '支付失败，请重试')
+    // 初始化支付
+    const { code, data, msg } = await wxPayAPI({ order_id: orderId.value });
+    if (!code) {
+      throw new Error(msg || '支付初始化失败，请重试');
+    }
+
+    // 确保WeixinJSBridge已准备就绪
+    const bridge = await initWxPay();
+    if (!bridge) {
+      throw new Error('微信支付环境初始化失败，请在微信中打开');
     }
+
+    // 发起支付请求
+    bridge.invoke('getBrandWCPayRequest', { ...data.payargs }, async (res) => {
+      try {
+        await handlePaymentResult(res);
+      } catch (error) {
+        console.error('支付处理失败:', error);
+        paymentStatus.value = 'failed';
+        paymentError.value = error.message || '支付处理失败，请重试';
+      }
+    });
+
   } catch (error) {
-    console.error('Checkout failed:', error)
-    alert(error.message || '支付失败，请重试')
+    console.error('支付失败:', error);
+    paymentStatus.value = 'failed';
+    paymentError.value = error.message || '支付失败，请重试';
   } finally {
-    isProcessing.value = false
+    isProcessing.value = false;
   }
 }