import {useEffect, useState} from "react";
import {Image, Badge, Popup, CellGroup, Cell} from "@nutui/nutui-react-taro";
import {ArrowLeft, Headphones, Share, Cart, ArrowRight} from "@nutui/icons-react-taro";
import Taro, {useShareAppMessage} from "@tarojs/taro";
import {RichText, View, Text} from '@tarojs/components'
import {ShopGoods} from "@/api/shop/shopGoods/model";
import {getShopGoods} from "@/api/shop/shopGoods";
import {listShopGoodsSpec} from "@/api/shop/shopGoodsSpec";
import {ShopGoodsSpec} from "@/api/shop/shopGoodsSpec/model";
import {listShopGoodsSku} from "@/api/shop/shopGoodsSku";
import {ShopGoodsSku} from "@/api/shop/shopGoodsSku/model";
import {Swiper} from '@nutui/nutui-react-taro'
import navTo, {wxParse} from "@/utils/common";
import SpecSelector from "@/components/SpecSelector";
import "./index.scss";
import {useCart} from "@/hooks/useCart";
import {useConfig} from "@/hooks/useConfig";
import {parseInviteParams, saveInviteParams, trackInviteSource} from "@/utils/invite";
import { ensureLoggedIn } from '@/utils/auth'
import {getGltTicketTemplateByGoodsId} from "@/api/glt/gltTicketTemplate";
import type {GltTicketTemplate} from "@/api/glt/gltTicketTemplate/model";

const GoodsDetail = () => {
  const [statusBarHeight, setStatusBarHeight] = useState<number>(44);
  const [windowWidth, setWindowWidth] = useState<number>(390)
  const [goods, setGoods] = useState<ShopGoods | null>(null);
  const [files, setFiles] = useState<any[]>([]);
  const [specs, setSpecs] = useState<ShopGoodsSpec[]>([]);
  const [skus, setSkus] = useState<ShopGoodsSku[]>([]);
  const [showSpecSelector, setShowSpecSelector] = useState(false);
  const [specAction, setSpecAction] = useState<'cart' | 'buy'>('cart');
  const [showBottom, setShowBottom] = useState(false)
  const [bottomItem, setBottomItem] = useState<any>({
    title: '',
    content: ''
  })
  // 水票套票模板：存在时该商品不允许加入购物车（购物车无法支付此类商品）
  const [ticketTemplate, setTicketTemplate] = useState<GltTicketTemplate | null>(null)
  const [ticketTemplateChecked, setTicketTemplateChecked] = useState(false)
  // const [selectedSku, setSelectedSku] = useState<ShopGoodsSku | null>(null);
  const [loading, setLoading] = useState(false);
  const router = Taro.getCurrentInstance().router;
  const goodsId = router?.params?.id;

  // 使用购物车Hook
  const {cartCount, addToCart} = useCart()
  const {config} = useConfig()

  // 如果从分享链接进入（携带 inviter/source/t），且当前未登录，则暂存邀请信息用于注册后绑定关系
  useEffect(() => {
    try {
      const currentUserId = Taro.getStorageSync('UserId')
      if (currentUserId) return

      const inviteParams = parseInviteParams({query: router?.params})
      if (inviteParams?.inviter) {
        saveInviteParams(inviteParams)
        trackInviteSource(inviteParams.source || 'share', parseInt(inviteParams.inviter))
      }
    } catch (e) {
      // 邀请参数解析/存储失败不影响正常浏览商品
      console.error('商品详情页处理邀请参数失败:', e)
    }
    // router 在 Taro 中可能不稳定；这里仅在 goodsId 变化时尝试处理一次即可
  }, [goodsId])

  // 处理加入购物车
  const handleAddToCart = async () => {
    if (!goods) return;

    // 水票套票商品：不允许加入购物车（购物车无法支付）
    // 优先使用已加载的 ticketTemplate；若尚未加载则补一次查询
    let tpl = ticketTemplate
    let checked = ticketTemplateChecked
    if (!tpl && goods?.goodsId) {
      try {
        tpl = await getGltTicketTemplateByGoodsId(Number(goods.goodsId))
        setTicketTemplate(tpl)
        setTicketTemplateChecked(true)
        checked = true
      } catch (_e) {
        tpl = null
        setTicketTemplateChecked(true)
        checked = true
      }
    }
    if (!checked || tpl) {
      return
    }

    if (!ensureLoggedIn(`/shop/goodsDetail/index?id=${goods.goodsId}`)) return

    // 如果有规格，显示规格选择器
    if (specs.length > 0) {
      setSpecAction('cart');
      setShowSpecSelector(true);
      return;
    }

    // 没有规格，直接加入购物车
    addToCart({
      goodsId: goods.goodsId!,
      name: goods.name || '',
      price: goods.price || '0',
      image: goods.image || ''
    });
  };

  // 处理立即购买
  const handleBuyNow = () => {
    if (!goods) return;

    if (!ensureLoggedIn(`/shop/orderConfirm/index?goodsId=${goods.goodsId}`)) return

    // 如果有规格，显示规格选择器
    if (specs.length > 0) {
      setSpecAction('buy');
      setShowSpecSelector(true);
      return;
    }

    // 没有规格，直接购买
    navTo(`/shop/orderConfirm/index?goodsId=${goods?.goodsId}`, true);
  };

  // 规格选择确认回调
  const handleSpecConfirm = async (sku: ShopGoodsSku, quantity: number, action?: 'cart' | 'buy') => {
    // setSelectedSku(sku);
    setShowSpecSelector(false);

    if (action === 'cart') {
      // 水票套票商品：不允许加入购物车（购物车无法支付）
      let tpl = ticketTemplate
      let checked = ticketTemplateChecked
      if (!tpl && goods?.goodsId) {
        try {
          tpl = await getGltTicketTemplateByGoodsId(Number(goods.goodsId))
          setTicketTemplate(tpl)
          setTicketTemplateChecked(true)
          checked = true
        } catch (_e) {
          tpl = null
          setTicketTemplateChecked(true)
          checked = true
        }
      }
      if (!checked || tpl) {
        return
      }

      // 加入购物车
      addToCart({
        goodsId: goods!.goodsId!,
        skuId: sku.id,
        name: goods!.name || '',
        price: sku.price || goods!.price || '0',
        image: goods!.image || '',
        specInfo: sku.sku, // sku字段包含规格信息
      }, quantity);
    } else if (action === 'buy') {
      // 立即购买
      const orderData = {
        goodsId: goods!.goodsId!,
        skuId: sku.id,
        quantity,
        price: sku.price || goods!.price || '0'
      };
      navTo(`/shop/orderConfirm/index?orderData=${encodeURIComponent(JSON.stringify(orderData))}`, true);
    } else {
      // 默认情况：如果action未定义，默认为立即购买
      const orderData = {
        goodsId: goods!.goodsId!,
        skuId: sku.id,
        quantity,
        price: sku.price || goods!.price || '0'
      };
      navTo(`/shop/orderConfirm/index?orderData=${encodeURIComponent(JSON.stringify(orderData))}`, true);
    }
  };

  const openBottom = (title: string, content: string) => {
    setBottomItem({
      title,
      content
    })
    setShowBottom(true)
  }

  useEffect(() => {
    let alive = true
    Taro.getSystemInfo({
      success: (res) => {
        if (!alive) return
        setWindowWidth(res.windowWidth)
        setStatusBarHeight(Number(res.statusBarHeight) + 5)
      },
    });
    if (goodsId) {
      setLoading(true);
      // 切换商品时先重置套票模板，避免复用上一个商品状态
      setTicketTemplate(null)
      setTicketTemplateChecked(false)

      // 加载商品详情
      getShopGoods(Number(goodsId))
        .then((res) => {
          // 处理富文本内容，去掉图片间距
          if (res.content) {
            res.content = wxParse(res.content);
          }
          if (!alive) return
          setGoods(res);
          if (res.files) {
            const arr = JSON.parse(res.files);
            arr.length > 0 && setFiles(arr);
          }
        })
        .catch((error) => {
          console.error("Failed to fetch goods detail:", error);
        })
        .finally(() => {
          if (!alive) return
          setLoading(false);
        });

      // 查询商品是否绑定水票模板（失败/无数据时不影响正常浏览）
      getGltTicketTemplateByGoodsId(Number(goodsId))
        .then((tpl) => {
          if (!alive) return
          setTicketTemplate(tpl)
          setTicketTemplateChecked(true)
        })
        .catch((_e) => {
          if (!alive) return
          setTicketTemplate(null)
          setTicketTemplateChecked(true)
        })

      // 加载商品规格
      listShopGoodsSpec({goodsId: Number(goodsId)} as any)
        .then((data) => {
          if (!alive) return
          setSpecs(data || []);
        })
        .catch((error) => {
          console.error("Failed to fetch goods specs:", error);
        });

      // 加载商品SKU
      listShopGoodsSku({goodsId: Number(goodsId)} as any)
        .then((data) => {
          if (!alive) return
          setSkus(data || []);
        })
        .catch((error) => {
          console.error("Failed to fetch goods skus:", error);
        });
    }
    return () => {
      alive = false
    }
  }, [goodsId]);

  // 分享给好友
  useShareAppMessage(() => {
    const inviter = Taro.getStorageSync('UserId')
    const sharePath =
      inviter
        ? `/shop/goodsDetail/index?id=${goodsId}&inviter=${inviter}&source=goods_share&t=${Date.now()}`
        : `/shop/goodsDetail/index?id=${goodsId}`

    return {
      title: goods?.name || '精选商品',
      path: sharePath,
      imageUrl: goods?.image ? `${goods.image}?x-oss-process=image/resize,w_500,h_400,m_fill` : undefined, // 分享图片，调整为5:4比例
      success: function (res: any) {
        console.log('分享成功', res);
        Taro.showToast({
          title: '分享成功',
          icon: 'success',
          duration: 2000
        });
      },
      fail: function (res: any) {
        console.log('分享失败', res);
        Taro.showToast({
          title: '分享失败',
          icon: 'none',
          duration: 2000
        });
      }
    };
  });

  if (!goods || loading) {
    return <View>加载中...</View>;
  }

  const showAddToCart = ticketTemplateChecked && !ticketTemplate

  return (
    <View className={"py-0"}>
      <View
        className={
          "fixed z-10 bg-white flex justify-center items-center font-bold shadow-sm opacity-70"
        }
        style={{
          borderRadius: "100%",
          width: "32px",
          height: "32px",
          top: statusBarHeight + 'px',
          left: "10px",
        }}
        onClick={() => Taro.navigateBack()}
      >
        <ArrowLeft size={14}/>
      </View>
      <View className={
        "fixed z-10 bg-white flex justify-center items-center font-bold shadow-sm opacity-90"
      }
            style={{
              borderRadius: "100%",
              width: "32px",
              height: "32px",
              top: statusBarHeight + 'px',
              right: "110px",
            }}
            onClick={() => Taro.switchTab({url: `/pages/cart/cart`})}>
        <Badge value={cartCount} top="-2" right="2">
          <View style={{display: 'flex', alignItems: 'center'}}>
            <Cart size={16}/>
          </View>
        </Badge>
      </View>
      {
        files.length > 0 && (
          <Swiper defaultValue={0} indicator height={windowWidth}>
            {files.map((item) => (
              <Swiper.Item key={item}>
                <Image width={windowWidth} height={windowWidth} src={item.url} mode={'scaleToFill'} lazyLoad={false}/>
              </Swiper.Item>
            ))}
          </Swiper>
        )
      }
      {
        files.length == 0 && (
          <Image
            src={goods.image}
            mode={"scaleToFill"}
            radius="10px 10px 0 0"
            height="300"
          />
        )
      }
      <View
        className={"flex flex-col justify-between items-center"}
      >
        <View
          className={
            "flex flex-col bg-white w-full"
          }
        >
          <View className={"flex flex-col p-3 rounded-lg"}>
            <>
              <View className={'flex justify-between'}>
                <View className={'flex text-red-500 text-xl items-baseline'}>
                  <Text className={'text-xs'}>￥</Text>
                  <Text className={'font-bold text-2xl'}>{goods.buyingPrice}</Text>
                  <Text className={'text-xs px-1'}>会员价</Text>
                  <Text className={'text-xs text-gray-400 line-through'}>￥{goods.salePrice}/{goods.unitName}</Text>
                </View>
                <span className={"text-gray-400 text-xs"}>已售 {goods.sales}</span>
              </View>
              <View className={'flex justify-between items-center'}>
                <View className={'goods-info'}>
                  <View className={"car-no text-lg"}>
                    {goods.name}
                  </View>
                  <View className={"flex justify-between text-xs py-1"}>
                <span className={"text-orange-500"}>
                  {goods.comments}
                </span>
                  </View>
                </View>
                <View>
                  <button
                    className={'flex flex-col  justify-center items-center bg-white text-gray-500 px-1 gap-1 text-nowrap whitespace-nowrap'}
                    open-type="share">
                    <Share size={20}/>
                    <span className={'text-xs'}>分享</span>
                  </button>
                </View>
              </View>
            </>
          </View>
        </View>
        <View className={'w-full'}>
          {
            config?.deliveryText && (
              <CellGroup>
                <Cell title={'配送'} extra={
                  <View className="flex items-center">
                    <Text className={'truncate max-w-56 inline-block'}>{config?.deliveryText || '14:30下单，明天配送'}</Text>
                    <ArrowRight color="#cccccc" size={15}/>
                  </View>
                } onClick={() => openBottom('配送', `${config?.deliveryText}`)}/>
                <Cell title={'保障'} extra={
                  <View className="flex items-center">
                    <Text className={'truncate max-w-56 inline-block'}>{config?.guaranteeText || '支持7天无理由退货'}</Text>
                    <ArrowRight color="#cccccc" size={15}/>
                  </View>
                } onClick={() => openBottom('保障', `${config?.guaranteeText}`)}/>
              </CellGroup>
            )
          }
          {config?.openComments == '1' && (
            <CellGroup>
              <Cell title={'用户评价 (0)'} extra={
                <>
                  <Text>查看全部</Text>
                  <ArrowRight color="#cccccc" size={15}/>
                </>
              } onClick={() => navTo(`/shop/comments/index`)}/>
              <Cell className={'flex h-32 bg-white p-4'}>
                暂无评价
              </Cell>
            </CellGroup>
          )}
        </View>
        <View className={'w-full'}>
          <RichText nodes={goods.content || '内容详情'}/>
          <View className={'h-24'}></View>
        </View>
      </View>
      {/*底部弹窗*/}
      <Popup
        visible={showBottom}
        position="bottom"
        onClose={() => {
          setShowBottom(false)
        }}
        lockScroll
      >
        <View className={'flex flex-col p-4'}>
          <Text className={'font-bold text-sm'}>{bottomItem.title}</Text>
          <Text className={'text-gray-500 my-2'}>{bottomItem.content}</Text>
        </View>
      </Popup>
      {/*底部购买按钮*/}
      <View className={'fixed bg-white w-full bottom-0 left-0 pt-4 pb-6'}>
        <View className={'btn-bar flex justify-between items-center'}>
          <View className={'flex justify-center items-center mx-4'}>
            <button open-type="contact" className={'flex items-center text-sm py-2'}>
              <Headphones size={16} style={{marginRight: '4px'}}/>咨询
            </button>
          </View>
          <View className={'buy-btn mx-4'}>
            {showAddToCart && (
              <View className={'cart-add px-4 text-sm'}
                    onClick={() => handleAddToCart()}>加入购物车
              </View>
            )}
            <View className={`cart-buy text-sm ${showAddToCart ? 'pl-4 pr-5' : 'cart-buy-only px-4'}`}
                  onClick={() => handleBuyNow()}>立即购买
            </View>
          </View>
        </View>
      </View>

      {/* 规格选择器 */}
      {showSpecSelector && (
        <SpecSelector
          goods={goods!}
          specs={specs}
          skus={skus}
          action={specAction}
          onConfirm={handleSpecConfirm}
          onClose={() => setShowSpecSelector(false)}
        />
      )}
    </View>
  );
};

export default GoodsDetail;