<script setup lang="ts">
import { useCartStore } from "@/pinia/stores/cart"
import { Product } from "@/pinia/stores/product"
import { storeToRefs } from "pinia"
import { showConfirmDialog } from "vant"
import { useRouter } from "vue-router"

// 新增购物车状态

// 定义组件事件：关闭详情
const emit = defineEmits(["cartClose"])
const router = useRouter()
// 状态管理
const cartStore = useCartStore()
const { cartItems, totalPrice, totalQuantity } = storeToRefs(cartStore)// 处理关闭按钮点击事件
function handleClose() {
  emit("cartClose")
}
function handleAddToCart(product: Product) {
  cartStore.addToCart(product)
}

function handleRemoveFromCart(product: Product) {
  cartStore.removeFromCart(product.cellId)
}

function handleClearCart() {
  showConfirmDialog({
    title: "确认清空购物车吗？"
  })
    .then(() => {
      cartStore.clearCart()
    })
    .catch(() => {
      // on cancel
    })
}

// 结算方法
function handleCheckout() {
  handleClose()
  router.push("/product/checkout")
}
</script>

<template>
  <div class="cart-container">
    <!-- 修改后的header结构 -->
    <div class="flex-header">
      <div class="clear-header">
        <van-button
          size="small" type="primary" class="clear-btn" plain
          @click="handleClearCart"
        >
          清空购物车
        </van-button>
      </div>
    </div>
    <div class="product-list">
      <van-cell v-for="item in cartItems" :key="item.product.id" class="product-item">
        <template #icon>
          <van-image :src="item.product.image" width="80" height="80" class="product-image">
            <!-- 真正的图片错误处理 -->
            <template #error>
              <div class="custom-error">
                图片加载失败
              </div>
            </template>
          </van-image>
        </template>
        <div class="product-info">
          <div class="product-name van-ellipsis">
            {{ item.product.name }}
          </div>
          <div class="product-price">
            ¥{{ item.product.price.toFixed(2) }}
          </div>
          <div class="action-row">
            <span v-if="item.product.stock > 0" class="stock-count">
              还剩{{ item.product.stock }}份
            </span>
            <div class="cart-actions">
              <van-button size="mini" icon="minus" @click.stop="handleRemoveFromCart(item.product)" />
              <span class="cart-count">{{ item.quantity }}</span>
              <van-button
                size="mini" type="primary" class="add-cart-btn" icon="plus"
                @click.stop="handleAddToCart(item.product)"
              />
            </div>
          </div>
        </div>
      </van-cell>
      <!-- 底部购物车栏 -->
      <div v-if="cartItems.length" class="shopping-cart-bar">
        <div class="cart-info">
          <van-badge :content="totalQuantity" @click.stop="handleClose()">
            <van-icon name="shopping-cart-o" size="24" />
          </van-badge>
          <div class="total-price">
            合计：¥{{ totalPrice.toFixed(2) }}
          </div>
        </div>
        <van-button type="primary" size="small" @click="handleCheckout" class="checkout-btn">
          去结算
        </van-button>
      </div>
    </div>
  </div>
</template>

<style scoped>
.product-list {
  flex: 1;
  overflow-y: auto;
  padding: 10px 16px 60px;
  background: #ffffff;
}

.product-item {
  margin-bottom: 10px;
  padding: min(2.667vw, 20px) 0;
  /* border-radius: 4px; */
  /* box-shadow: 0 2px 4px rgba(0,0,0,0.05); */
}

.product-image {
  margin-right: 12px;
  border-radius: 4px;
  overflow: hidden;
}

.product-info {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 80px;
  position: relative;
}

.product-name {
  font-size: 14px;
  color: #333;
  line-height: 1.4;
  text-align: left;
}

.product-price {
  font-size: 16px;
  color: #e95d5d;
  font-weight: bold;
  text-align: left;
}

.add-cart-btn {
  align-self: flex-end;
  margin-top: 0;
  background-color: #e95d5d;
  border-color: #e95d5d;
}

.action-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  /* 底部对齐 */
  margin-top: auto;
  /* 推到容器底部 */
}

.stock-count {
  font-size: 11px;
  color: #bbbbbb;
  margin-right: 8px;
  display: flex;
  align-items: flex-end;
  height: 100%;
  line-height: 1;
}

/* 修改购物车栏样式 */
.shopping-cart-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.05);
  z-index: 100;
}

.cart-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.total-price {
  font-size: 14px;
  color: #333;
  font-weight: bold;
}

.checkout-btn {
  background-color: #e95d5d;
  border: none;
  border-radius: 16px;
  padding: 0 24px;
}

.cart-actions {
  margin-left: auto;
  align-self: flex-end;
  display: flex;
  align-items: center;
  gap: 4px;
  /* margin-left: 8px; */

  .cart-count {
    font-size: 12px;
    min-width: 20px;
    text-align: center;
  }
}

.cart-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* 保持其他样式不变 */
.flex-header {
  display: flex;
  justify-content: flex-end;
  background: white;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.clear-header {
  padding: 10px 16px;
  /* 添加左右边距 */
  margin-bottom: 0;
}

.clear-btn {
  color: #e95d5d;
  border-color: #e95d5d;
}
</style>
