<template>
  <!-- 点餐页：左上角永远返回主页 -->
  <view class="page-wrap">
    <NavBar title="点餐" only-home />
    <view class="content">
    <view class="top-info">桌号：{{ displayTableNumber }} &nbsp;&nbsp;就餐人数：{{ currentDiners }}人</view>
    <!-- 搜索 -->
    <input type="text" placeholder="请输入菜品名称" class="search-input" />

    <!-- 内容 -->
    <view class="content-box">
      <!-- 左侧分类列表 -->
      <scroll-view class="category-list" scroll-y>
        <view v-for="(category, index) in categories" :key="index" class="category-item"
          :class="{ active: currentCategoryIndex === index }" @click="selectCategory(index)">
          {{ category.categoryName }}
        </view>
      </scroll-view>

      <!-- 右侧菜品列表 -->
      <scroll-view class="food-list" scroll-y>
        <FoodCard v-for="(food, index) in currentFoodList" :key="food.id || food.cuisineId || index" :food="food"
          :table-id="tableId" @increase="handleIncrease" @decrease="handleDecrease"/>
      </scroll-view>
    </view>

    <!-- 底部下单：按接口格式展示 totalQuantity / totalAmount -->
    <BottomActionBar :cart-list="displayCartList" :total-quantity="displayTotalQuantity"
      :total-amount="displayTotalAmount" @coupon-click="handleCouponClick" @cart-click="handleCartClick"
      @order-click="handleOrderClick" />

    <!-- 领取优惠券弹窗 -->
    <CouponModal v-model:open="couponModalOpen" :coupon-list="couponList" @close="handleCouponClose" />

    <!-- 购物车弹窗：按接口格式展示 items（cuisineName/cuisineImage/quantity/unitPrice/subtotalAmount/remark） -->
    <CartModal v-model:open="cartModalOpen" :cart-list="displayCartList"
      @increase="handleIncrease" @decrease="handleDecrease" @clear="handleCartClear"
      @order-click="handleOrderClick" @close="handleCartClose" />

    <!-- 选择优惠券弹窗：左下角入口为仅查看，购物车内入口为可选 -->
    <SelectCouponModal v-model:open="selectCouponModalOpen" :coupon-list="availableCoupons"
      :selected-coupon-id="selectedCouponId" :view-only="selectCouponViewOnly" @select="handleCouponSelect" @close="handleSelectCouponClose" />
    </view>
  </view>
</template>

<script setup>
import { onLoad, onShow, onUnload } from "@dcloudio/uni-app";
import NavBar from "@/components/NavBar/index.vue";
import { ref, computed, nextTick } from "vue";
import FoodCard from "./components/FoodCard.vue";
import BottomActionBar from "./components/BottomActionBar.vue";
import CouponModal from "./components/CouponModal.vue";
import CartModal from "./components/CartModal.vue";
import SelectCouponModal from "./components/SelectCouponModal.vue";
import { go } from "@/utils/utils.js";
import { DiningOrderFood, GetStoreCategories, GetStoreCuisines, getOrderSseConfig, GetOrderCart, PostOrderCartAdd, PostOrderCartUpdate, PostOrderCartClear, PutOrderCartUpdateTableware, GetUserOwnedCouponList } from "@/api/dining.js";
import { createSSEConnection } from "@/utils/sse.js";

const tableId = ref(''); // 桌号ID，来自上一页 url 参数 tableid，用于接口入参
const tableNumber = ref(''); // 桌号展示，来自 dining/page-info 接口返回的 tableNumber
const tableNumberFetched = ref(false); // 是否已请求过桌号（避免未返回前用 tableId 展示导致闪一下 43）
const currentDiners = ref(uni.getStorageSync('currentDiners') || '');

// 桌号展示：优先用接口返回的 tableNumber，未请求完前不显示 tableId，避免闪 43 再变 2
const displayTableNumber = computed(() => {
  if (tableNumber.value) return tableNumber.value;
  if (tableNumberFetched.value && tableId.value) return tableId.value;
  return '—';
});
let sseRequestTask = null; // 订单 SSE 连接（封装后兼容小程序），页面卸载时需 abort()
const currentCategoryIndex = ref(0);
const couponModalOpen = ref(false);
const cartModalOpen = ref(false);
const selectCouponModalOpen = ref(false);
const selectCouponViewOnly = ref(false); // true=左下角仅查看，false=购物车内可选
const discountAmount = ref(12); // 优惠金额，示例数据
const selectedCouponId = ref(null); // 选中的优惠券ID

// 分类列表（由接口 /store/info/categories 返回后赋值）
const categories = ref([]);

// 菜品列表（由接口 /store/info/cuisines 按分类拉取并合并，每项含 quantity、categoryId）
const foodList = ref([]);
// SSE 连接建立后拉取的购物车数据，在 foodList 就绪后合并
let pendingCartData = null;
// 购物车接口返回的完整数据：{ items, totalAmount, totalQuantity, tablewareFee }，用于按接口格式展示
const cartData = ref({ items: [], totalAmount: 0, totalQuantity: 0, tablewareFee: 0 });

// 当前分类的菜品列表（按当前选中的分类 id 过滤）
const currentFoodList = computed(() => {
  const cat = categories.value[currentCategoryIndex.value];
  if (!cat) return [];
  const categoryId = cat.id ?? cat.categoryId;
  return foodList.value.filter((food) => String(food?.categoryId ?? '') === String(categoryId ?? ''));
});

// 购物车列表：只包含数量>0 的菜品，并按菜品 id 去重（同一菜品只算一条，避免金额叠加）
const cartList = computed(() => {
  const withQty = foodList.value.filter((food) => (food.quantity || 0) > 0);
  const seen = new Set();
  return withQty.filter((f) => {
    const id = String(f?.id ?? '');
    if (seen.has(id)) return false;
    seen.add(id);
    return true;
  });
});

// 用于展示的购物车列表：优先使用接口返回的 items（含 cuisineName/cuisineImage/unitPrice/subtotalAmount/remark），只展示数量>0
const displayCartList = computed(() => {
  const apiItems = cartData.value?.items;
  if (Array.isArray(apiItems) && apiItems.length > 0) {
    return apiItems.filter((it) => (Number(it?.quantity) || 0) > 0);
  }
  return cartList.value;
});

// 行小计：接口项用 subtotalAmount，否则 数量×单价（与 BottomActionBar/CartModal 一致）
const getItemLinePrice = (item) => {
  if (item?.subtotalAmount != null) return Number(item.subtotalAmount);
  const qty = Number(item?.quantity) || 0;
  const unitPrice = Number(item?.unitPrice ?? item?.price ?? item?.salePrice ?? item?.totalPrice ?? 0) || 0;
  return qty * unitPrice;
};

// 展示用总数量：优先接口/本地 cartData.totalQuantity，否则从展示列表计算
const displayTotalQuantity = computed(() => {
  const apiItems = cartData.value?.items;
  if (Array.isArray(apiItems) && apiItems.length > 0 && cartData.value?.totalQuantity != null) {
    return Number(cartData.value.totalQuantity);
  }
  return displayCartList.value.reduce((sum, item) => sum + (Number(item?.quantity) || 0), 0);
});

// 展示用总金额：优先接口/本地 cartData.totalAmount，否则从展示列表按行小计累加
const displayTotalAmount = computed(() => {
  const apiItems = cartData.value?.items;
  if (Array.isArray(apiItems) && apiItems.length > 0 && cartData.value?.totalAmount != null) {
    return Number(cartData.value.totalAmount);
  }
  return displayCartList.value.reduce((sum, item) => sum + getItemLinePrice(item), 0);
});

// 优惠券列表（由接口 /dining/coupon/storeUsableList 返回后赋值）
const couponList = ref([]);
// 门店可用优惠券列表（选择优惠券弹窗用，与 couponList 同步自同一接口）
const storeUsableCouponList = ref([]);

// 规范化接口优惠券项为弹窗所需格式（对接 userOwnedByStore 返回的 data 数组：id/couponId/userCouponId、name、couponType、discountRate、minimumSpendingAmount、expirationTime 等）
// couponType 1=满减券显示 nominalValue 为金额，2=折扣券显示 discountRate 为折扣力度
function normalizeCouponItem(item) {
  if (!item || typeof item !== 'object') return null;
  const raw = item;
  const couponType = Number(raw.couponType) || 0;
  const nominalValue = Number(raw.nominalValue ?? raw.amount ?? 0) || 0;
  const discountRate = Number(raw.discountRate) || 0;
  const minAmount = Number(raw.minimumSpendingAmount ?? raw.minAmount ?? raw.min_amount ?? 0) || 0;
  const isReceived = raw.canReceived === false;
  let amountDisplay = nominalValue + '元';
  if (couponType === 1) {
    amountDisplay = nominalValue + '元';
  } else if (couponType === 2 && discountRate > 0) {
    amountDisplay = Math.round(discountRate) + '折';
  }
  return {
    id: raw.userCouponId ?? raw.id ?? raw.couponId ?? raw.coupon_id ?? '',
    amount: nominalValue,
    minAmount,
    name: raw.name ?? raw.title ?? raw.couponName ?? '',
    expireDate: raw.expirationTime ?? raw.endGetDate ?? raw.validDate ?? raw.expireDate ?? raw.endTime ?? '',
    isReceived,
    couponType,
    discountRate,
    amountDisplay
  };
}

// 可用的优惠券列表（选择优惠券弹窗用，来自 storeUsableCouponList）
const availableCoupons = computed(() => storeUsableCouponList.value);

// 分类 id 统一转字符串，避免 number/string 比较导致误判
const sameCategory = (a, b) => String(a ?? '') === String(b ?? '');

// 将购物车数量同步到菜品列表：用购物车接口的 items 按 cuisineId 匹配 foodList 中的菜品并更新 quantity；items 为空时清空所有菜品数量
const mergeCartIntoFoodList = () => {
  const cartItems = pendingCartData ?? cartData.value?.items ?? [];
  if (!Array.isArray(cartItems)) return;
  if (!foodList.value.length) {
    if (cartItems.length > 0) console.log('购物车已缓存，等 foodList 加载后再同步到菜品列表');
    return;
  }
  foodList.value = foodList.value.map((item) => {
    const itemId = String(item?.id ?? item?.cuisineId ?? '');
    const cartItem = cartItems.find((c) => {
      const cId = String(c?.id ?? c?.cuisineId ?? c?.foodId ?? c?.dishId ?? '');
      return cId && cId === itemId;
    });
    const qty = cartItem
      ? Number(cartItem.quantity ?? cartItem.num ?? cartItem.count ?? 0) || 0
      : 0;
    return { ...item, quantity: qty };
  });
  pendingCartData = null;
  console.log('购物车数量已同步到菜品列表', cartItems.length ? '' : '(已清空)');
};

// 从接口返回的 data 层中解析出购物车数组（/store/order/cart/{id} 返回在 items 下）
function parseCartListFromResponse(cartRes) {
  if (cartRes == null) return [];
  if (Array.isArray(cartRes.items)) return cartRes.items;
  // 优先 items（当前接口约定），再兼容 list / data / records 等
  const firstLevel =
    cartRes.items ??
    cartRes.list ??
    cartRes.data ??
    cartRes.records ??
    cartRes.cartList ??
    cartRes.cartItems ??
    cartRes.cart?.list ??
    cartRes.cart?.items ??
    cartRes.result?.list ??
    cartRes.result?.data ??
    cartRes.result?.items;
  if (Array.isArray(firstLevel)) return firstLevel;
  if (typeof cartRes === 'object') {
    const arr = Object.values(cartRes).find((v) => Array.isArray(v));
    if (arr) return arr;
  }
  return [];
}

// 调获取购物车接口并合并到 foodList（需在 foodList 有数据后调用才能返显到购物车）
// 注意：request 层在 code=200 时只返回 res.data.data，故 cartRes 已是后端 data 层
const fetchAndMergeCart = async (tableid) => {
  if (!tableid) return;
  try {
    const cartRes = await GetOrderCart(tableid);
    const list = parseCartListFromResponse(cartRes);
    pendingCartData = list;
    // 按接口格式绑定：data.items / totalAmount / totalQuantity / tablewareFee
    cartData.value = {
      items: list,
      totalAmount: Number(cartRes?.totalAmount) || 0,
      totalQuantity: Number(cartRes?.totalQuantity) || 0,
      tablewareFee: Number(cartRes?.tablewareFee ?? cartRes?.tablewareAmount ?? 0) || 0
    };
    mergeCartIntoFoodList();
    console.log('购物车接口返回(data 层):', cartRes, '解析条数:', list.length);
  } catch (err) {
    console.error('获取购物车失败:', err);
    throw err;
  }
};

// 根据分类 id 拉取菜品并合并到 foodList，切换分类时保留其他分类已选菜品及本分类已选数量
const fetchCuisinesByCategoryId = async (categoryId) => {
  if (!categoryId) return;
  try {
    const res = await GetStoreCuisines({ categoryId });
    const list = res?.list ?? res?.data ?? (Array.isArray(res) ? res : []);
    const normalized = (Array.isArray(list) ? list : []).map(item => ({
      ...item,
      quantity: item.quantity ?? 0,
      categoryId: item.categoryId ?? categoryId
    }));
    // 其他分类的菜品原样保留（含已选数量）
    const rest = foodList.value.filter(f => !sameCategory(f.categoryId, categoryId));
    // 本分类：按菜品 id 从整份列表里取已选数量，id 一致则自动带上数量
    const merged = normalized.map((newItem) => {
      const existing = foodList.value.find(
        (e) => String(e?.id ?? e?.cuisineId ?? '') === String(newItem?.id ?? newItem?.cuisineId ?? '')
      );
      const quantity = existing ? existing.quantity : (newItem.quantity ?? 0);
      return { ...newItem, quantity };
    });
    foodList.value = [...rest, ...merged];
    // 切换分类后，把购物车数量再同步到当前分类的菜品列表
    mergeCartIntoFoodList();
  } catch (err) {
    console.error('获取菜品失败:', err);
  }
};

// 选择分类：切换高亮并拉取该分类菜品
const selectCategory = async (index) => {
  currentCategoryIndex.value = index;
  const cat = categories.value[index];
  if (!cat) return;
  const categoryId = cat.id ?? cat.categoryId;
  await fetchCuisinesByCategoryId(categoryId);
};

// 根据展示项（可能来自接口 cuisineId 或 foodList 的 id）找到 foodList 中的菜品
const findFoodByCartItem = (item) => {
  const id = item?.id ?? item?.cuisineId;
  if (id == null) return null;
  return foodList.value.find((f) => String(f?.id ?? f?.cuisineId ?? '') === String(id));
};

// 同步 cartData：根据 cuisineId 更新 items 中对应项的 quantity、subtotalAmount，并重算 totalAmount、totalQuantity
const syncCartDataFromFoodList = () => {
  const items = cartData.value?.items ?? [];
  if (!items.length) return;
  let totalAmount = 0;
  let totalQuantity = 0;
  const nextItems = items.map((it) => {
    const food = findFoodByCartItem(it);
    const qty = food != null ? (food.quantity || 0) : (it.quantity || 0);
    const unitPrice = Number(it?.unitPrice ?? it?.price ?? 0) || 0;
    const subtotalAmount = qty * unitPrice;
    totalAmount += subtotalAmount;
    totalQuantity += qty;
    return { ...it, quantity: qty, subtotalAmount };
  });
  cartData.value = { ...cartData.value, items: nextItems, totalAmount, totalQuantity };
};

// 判断是否为餐具（cuisineId 或 id 为 -1），餐具不可修改数量
const isTableware = (item) => {
  if (!item) return false;
  const id = item.id ?? item.cuisineId;
  return Number(id) === -1;
};

// 更新菜品数量：菜品 id 一致则全部同步为同一数量，触发响应式；新增加入购物车时调接口；并同步 cartData
// Update 接口返回 400 时不改页面数量和金额（会回滚本地状态）
const updateFoodQuantity = (food, delta) => {
  if (!food) return;
  if (isTableware(food)) {
    uni.showToast({ title: '不允许更改餐具数量', icon: 'none' });
    return;
  }
  const id = food.id ?? food.cuisineId;
  const prevQty = food.quantity || 0;
  const nextQty = Math.max(0, prevQty + delta);
  const sameId = (item) =>
    String(item?.id ?? item?.cuisineId ?? '') === String(id ?? '');
  const items = cartData.value?.items ?? [];
  const idx = items.findIndex((it) => String(it?.cuisineId ?? it?.id ?? '') === String(id));

  const applyQuantity = (qty) => {
    foodList.value = foodList.value.map((item) =>
      sameId(item) ? { ...item, quantity: qty } : item
    );
    const currentItems = cartData.value?.items ?? [];
    const currentIdx = currentItems.findIndex((it) => String(it?.cuisineId ?? it?.id ?? '') === String(id));
    if (currentIdx >= 0) {
      const it = currentItems[currentIdx];
      const unitPrice = Number(it?.unitPrice ?? it?.price ?? 0) || 0;
      const nextItems = currentItems.slice();
      nextItems[currentIdx] = { ...it, quantity: qty, subtotalAmount: qty * unitPrice };
      const totalAmount = nextItems.reduce((s, i) => s + (Number(i.subtotalAmount) || 0), 0);
      const totalQuantity = nextItems.reduce((s, i) => s + (Number(i.quantity) || 0), 0);
      cartData.value = { ...cartData.value, items: nextItems, totalAmount, totalQuantity };
    } else if (qty > 0) {
      const unitPrice = Number(food?.price ?? food?.unitPrice ?? food?.salePrice ?? 0) || 0;
      const newItem = {
        cuisineId: id,
        cuisineName: food?.name ?? food?.cuisineName ?? '',
        cuisineImage: food?.image ?? food?.cuisineImage ?? food?.imageUrl ?? '',
        quantity: qty,
        unitPrice,
        subtotalAmount: qty * unitPrice
      };
      const nextItems = [...currentItems, newItem];
      const totalAmount = nextItems.reduce((s, i) => s + (Number(i.subtotalAmount) || 0), 0);
      const totalQuantity = nextItems.reduce((s, i) => s + (Number(i.quantity) || 0), 0);
      cartData.value = { ...cartData.value, items: nextItems, totalAmount, totalQuantity };
    }
  };

  applyQuantity(nextQty);

  if (tableId.value && delta !== 0) {
    const needAdd = delta > 0 && (idx < 0 || nextQty === 1);
    if (needAdd) {
      PostOrderCartAdd({
        cuisineId: id,
        quantity: nextQty,
        tableId: tableId.value
      }).catch((err) => {
        console.error('加入购物车失败:', err);
        applyQuantity(prevQty);
      });
    } else {
      PostOrderCartUpdate({
        cuisineId: id,
        quantity: nextQty,
        tableId: tableId.value
      }).catch((err) => {
        console.error('更新购物车失败:', err);
        applyQuantity(prevQty);
      });
    }
  }
};

// 增加数量：支持传入接口项（cuisineId）或菜品项（id），先解析为 foodList 中的 food
const handleIncrease = (item) => {
  const food = item?.id != null && item?.cuisineId == null ? item : findFoodByCartItem(item) ?? item;
  updateFoodQuantity(food, 1);
};

// 减少数量
const handleDecrease = (item) => {
  const food = item?.id != null && item?.cuisineId == null ? item : findFoodByCartItem(item) ?? item;
  if (food && (food.quantity || 0) > 0) updateFoodQuantity(food, -1);
};

// 拉取用户已领/可用优惠券（GET /dining/coupon/userOwnedByStore），列表在 SelectCouponModal 中展示，空时弹窗内显示「暂无可用优惠券」
const fetchUserOwnedCoupons = async () => {
  const storeId = uni.getStorageSync('currentStoreId') || '';
  try {
    const res = await GetUserOwnedCouponList({ storeId });
    // 接口返回 { code, data: [...], msg, success }，请求层可能只返回 data，故 res 可能为数组
    const list = Array.isArray(res) ? res : (res?.data ?? res?.records ?? res?.list ?? []);
    const normalized = (Array.isArray(list) ? list : []).map((item) => normalizeCouponItem(item)).filter(Boolean);
    storeUsableCouponList.value = normalized;
    return true;
  } catch (err) {
    console.error('获取用户优惠券失败:', err);
    uni.showToast({ title: '获取优惠券失败', icon: 'none' });
    return false;
  }
};

// 打开选择优惠券弹窗。viewOnly=true 仅查看（左下角），false 可选择并默认选中第一张（购物车内）
const openSelectCouponModal = async (viewOnly = false) => {
  if (cartModalOpen.value) cartModalOpen.value = false;
  if (couponModalOpen.value) couponModalOpen.value = false;
  selectCouponViewOnly.value = viewOnly;
  const ok = await fetchUserOwnedCoupons();
  if (ok) {
    if (!viewOnly) {
      const list = storeUsableCouponList.value;
      if (list && list.length > 0) {
        const first = list[0];
        const firstId = first.id != null && first.id !== '' ? String(first.id) : null;
        selectedCouponId.value = firstId;
        discountAmount.value = first.amount ?? 0;
      } else {
        selectedCouponId.value = null;
        discountAmount.value = 0;
      }
    }
    await nextTick();
    selectCouponModalOpen.value = true;
  }
};

// 优惠券点击（左下角）：仅查看，不可选择
const handleCouponClick = () => {
  openSelectCouponModal(true);
};

// 选择优惠券点击（购物车内）：可选择，默认选中第一张
const handleSelectCouponClick = () => {
  openSelectCouponModal(false);
};

// 处理优惠券选择（单选：只保留当前选中的一张）
const handleCouponSelect = ({ coupon, index, selectedId }) => {
  selectedCouponId.value = selectedId != null && selectedId !== '' ? String(selectedId) : null;
  // 根据选中的优惠券更新优惠金额
  if (selectedCouponId.value) {
    discountAmount.value = coupon.amount ?? 0;
  } else {
    discountAmount.value = 0;
  }
  // 选择后关闭选择优惠券弹窗，打开购物车弹窗
  selectCouponModalOpen.value = false;
  // 延迟打开购物车弹窗，确保选择优惠券弹窗完全关闭
  setTimeout(() => {
    cartModalOpen.value = true;
  }, 100);
};

// 选择优惠券弹窗关闭
const handleSelectCouponClose = () => {
  selectCouponModalOpen.value = false;
};

// 优惠券弹窗关闭
const handleCouponClose = () => {
  couponModalOpen.value = false;
};

// 购物车点击
const handleCartClick = () => {
  if (displayCartList.value.length === 0) {
    uni.showToast({
      title: '购物车为空',
      icon: 'none'
    });
    return;
  }
  // 先关闭其他弹窗
  if (couponModalOpen.value) {
    couponModalOpen.value = false;
  }
  if (selectCouponModalOpen.value) {
    selectCouponModalOpen.value = false;
  }
  cartModalOpen.value = true;
};

// 购物车弹窗关闭
const handleCartClose = () => {
  cartModalOpen.value = false;
};

// 清空购物车：调用 /store/order/cart/clear，入参 tableId，成功后清空本地并关闭弹窗
const handleCartClear = () => {
  const doClear = () => {
    pendingCartData = null;
    foodList.value = foodList.value.map((f) => ({ ...f, quantity: 0 }));
    cartData.value = { items: [], totalAmount: 0, totalQuantity: 0 };
    cartModalOpen.value = false;
    uni.showToast({ title: '已清空购物车', icon: 'success' });
  };
  if (!tableId.value) {
    doClear();
    return;
  }
  PostOrderCartClear(tableId.value)
    .then(doClear)
    .catch((err) => {
      console.error('清空购物车失败:', err);
      uni.showToast({ title: '清空失败，请重试', icon: 'none' });
    });
};

// 从购物车项中计算餐具费：cuisineId/id 为 -1 的项为餐具，其金额合计为餐具费
const getTablewareFeeFromCart = () => {
  const items = cartData.value?.items ?? displayCartList.value ?? [];
  return (Array.isArray(items) ? items : []).reduce((sum, it) => {
    const id = it?.cuisineId ?? it?.id;
    if (Number(id) !== -1) return sum;
    const line = it?.subtotalAmount != null ? Number(it.subtotalAmount) : (Number(it?.quantity) || 0) * (Number(it?.unitPrice ?? it?.price) || 0);
    return sum + line;
  }, 0);
};

// 下单点击：先带购物车数据跳转确认订单页，创建订单在确认页点击「确认下单」时再调
const handleOrderClick = () => {
  const fromApi = Number(cartData.value?.tablewareFee) || 0;
  const fromItems = getTablewareFeeFromCart();
  const utensilFee = fromApi > 0 ? fromApi : fromItems;
  const totalAmount = displayTotalAmount.value;
  const dishTotal = Math.max(0, Number(totalAmount) - Number(utensilFee));
  const cartPayload = {
    list: displayCartList.value,
    totalAmount,
    dishTotal,
    totalQuantity: displayTotalQuantity.value,
    tableId: tableId.value,
    tableNumber: tableNumber.value,
    diners: currentDiners.value,
    utensilFee: Number(utensilFee) || 0
  };
  uni.setStorageSync('placeOrderCart', JSON.stringify(cartPayload));
  const query = [];
  if (tableId.value) query.push(`tableId=${encodeURIComponent(tableId.value)}`);
  if (tableNumber.value) query.push(`tableNumber=${encodeURIComponent(tableNumber.value)}`);
  if (currentDiners.value) query.push(`diners=${encodeURIComponent(currentDiners.value)}`);
  go(query.length ? `/pages/placeOrder/index?${query.join('&')}` : '/pages/placeOrder/index');
};

onLoad(async (options) => {
  // 获取上一页（选择就餐人数页）传来的桌号和就餐人数
  const tableid = options.tableid || '';
  const diners = options.diners || '';
  tableId.value = tableid;
  currentDiners.value = diners;
  if (tableid) uni.setStorageSync('currentTableId', tableid);
  if (diners) uni.setStorageSync('currentDiners', diners);
  console.log('点餐页接收参数 - 桌号(tableid):', tableid, '就餐人数(diners):', diners);

  // 更新餐具数量：quantity 传用餐人数，tableId 传桌号ID
  if (tableid && diners !== '' && diners != null) {
    PutOrderCartUpdateTableware({
      quantity: Number(diners) || 1,
      tableId: parseInt(tableid, 10) || 0
    }).catch((err) => console.warn('更新餐具数量失败:', err));
  }

  // 先拉取购物车并缓存，再加载菜品，保证合并时 pendingCartData 已就绪，避免不返显
  if (tableid) {
    await fetchAndMergeCart(tableid).catch((err) => console.error('获取购物车失败:', err));
  }

  // 页面加载时创建订单 SSE 连接（仅 SSE 使用 utils/sse 封装，兼容微信小程序）
  if (tableid) {
    try {
      const sseConfig = getOrderSseConfig(tableid);
      sseRequestTask = createSSEConnection(sseConfig.url, sseConfig);
      sseRequestTask.onMessage((msg) => {
        console.log('SSE 收到:', msg);
        if (msg.event === 'cart_update' && msg.data) {
          try {
            const payload = typeof msg.data === 'string' ? JSON.parse(msg.data) : msg.data;
            const items = payload?.items ?? [];
            cartData.value = {
              items: Array.isArray(items) ? items : [],
              totalAmount: Number(payload?.totalAmount) || 0,
              totalQuantity: Number(payload?.totalQuantity) || 0,
              tablewareFee: Number(payload?.tablewareFee ?? payload?.tablewareAmount ?? 0) || (cartData.value?.tablewareFee ?? 0)
            };
            pendingCartData = null;
            mergeCartIntoFoodList();
          } catch (e) {
            console.error('SSE 购物车数据解析失败:', e);
          }
        }
      });
      sseRequestTask.onOpen(async () => {
        console.log('SSE 连接已建立');
        await fetchAndMergeCart(tableid).catch(() => {});
      });
      sseRequestTask.onError((err) => console.error('SSE 错误:', err));
    } catch (e) {
      console.error('SSE 连接失败:', e);
    }
  }

  // 调用点餐页接口，入参 dinerCount、tableId
  if (tableid || diners) {
    try {
      const res = await DiningOrderFood({
        tableId: tableid,
        dinerCount: diners
      });
      console.log('点餐页接口返回:', res);

      const data = res?.data ?? res ?? {};
      tableNumber.value = data?.tableNumber ?? data?.tableNo ?? '';
      tableNumberFetched.value = true;
      // 餐具费：点餐页接口可能返回，若购物车未带则用此处兜底
      const fee = Number(data?.tablewareFee ?? data?.tablewareAmount ?? 0) || 0;
      if (fee > 0) cartData.value = { ...cartData.value, tablewareFee: fee };

      // 成功后调接口获取菜品种类（storeId 取自点餐页接口返回，若无则需从别处获取）
      const storeId = res?.storeId ?? data?.storeId ?? '';
      if (storeId) uni.setStorageSync('currentStoreId', storeId);
      if (storeId) {
        try {
          const categoriesRes = await GetStoreCategories({ storeId });
          const list = categoriesRes?.list ?? categoriesRes?.data ?? categoriesRes;
          if (Array.isArray(list) && list.length) {
            categories.value = list;
            // 默认用第一项的分类 id 拉取菜品
            const firstCat = list[0];
            const firstCategoryId = firstCat.id ?? firstCat.categoryId;
            if (firstCategoryId) {
              const cuisinesRes = await GetStoreCuisines({ categoryId: firstCategoryId });
              const cuisinesList = cuisinesRes?.list ?? cuisinesRes?.data ?? (Array.isArray(cuisinesRes) ? cuisinesRes : []);
              foodList.value = (Array.isArray(cuisinesList) ? cuisinesList : []).map(item => ({
                ...item,
                quantity: item.quantity ?? 0,
                categoryId: item.categoryId ?? firstCategoryId
              }));
              console.log('默认分类菜品:', cuisinesRes);
              mergeCartIntoFoodList();
            }
          }
          console.log('菜品种类:', categoriesRes);
        } catch (err) {
          console.error('获取菜品种类失败:', err);
        }
      }
    } catch (e) {
      console.error('点餐页接口失败:', e);
      tableNumberFetched.value = true;
    }
  } else {
    tableNumberFetched.value = true;
  }
});

// 回到点餐页时重新获取购物车（从接口拉取最新数据并合并到列表）
onShow(() => {
  const tableid = tableId.value || uni.getStorageSync('currentTableId') || '';
  if (tableid) {
    fetchAndMergeCart(tableid).catch((err) => console.warn('重新获取购物车失败:', err));
  }
});

onUnload(() => {
  if (sseRequestTask && typeof sseRequestTask.abort === 'function') {
    sseRequestTask.abort();
  }
  sseRequestTask = null;
});
</script>

<style lang="scss" scoped>
.content {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background-color: #f7f9fa;
  padding-bottom: 100rpx;
  box-sizing: border-box;
}

.top-info {
  font-size: 28rpx;
  color: #888888;
  text-align: center;
  width: 100%;
  padding: 20rpx 0;
  background-color: #fff;
}

.search-input {
  width: 90%;
  margin-left: 5%;
  height: 80rpx;
  background-color: #fff;
  border-radius: 40rpx;
  padding: 0 20rpx;
  margin-top: 20rpx;
  box-sizing: border-box;
  font-size: 28rpx;
  text-align: center;
}

.content-box {
  display: flex;
  flex: 1;
  overflow: hidden;
  margin-top: 20rpx;
}

// 左侧分类列表
.category-list {
  width: 180rpx;
  background-color: #fff;
  height: 100%;
}

.category-item {
  height: 100rpx;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28rpx;
  color: #999;
  background-color: #fff;
  transition: all 0.3s;

  &.active {
    background-color: #fff4e6;
    color: #333;
    font-weight: 600;
  }
}

// 右侧菜品列表
.food-list {
  flex: 1;
  // background-color: #fff;
  // padding: 0 20rpx;
  margin: 0 20rpx;
}
</style>
