import {useState, useEffect} from "react";
import {useRouter} from '@tarojs/taro'
import {Button, ConfigProvider, Input, TextArea} from '@nutui/nutui-react-taro'
import {ArrowLeft, Location} from '@nutui/icons-react-taro'
import Taro from '@tarojs/taro'
import {View, Text} from '@tarojs/components'
import {ShopGift} from "@/api/shop/shopGift/model";
import {getShopGift, useGift} from "@/api/shop/shopGift";
import GiftCard from "@/components/GiftCard";

const GiftCardUse = () => {
  const router = useRouter()
  const [gift, setGift] = useState<ShopGift | null>(null)
  const [loading, setLoading] = useState(true)
  const [submitting, setSubmitting] = useState(false)
  const [useLocation, setUseLocation] = useState('')
  const [useNote, setUseNote] = useState('')
  const [useSuccess, setUseSuccess] = useState(false)
  const giftId = router.params.id

  useEffect(() => {
    if (giftId) {
      loadGiftDetail()
    }
  }, [giftId])

  // 加载礼品卡详情
  const loadGiftDetail = async () => {
    try {
      setLoading(true)
      const data = await getShopGift(Number(giftId))
      setGift(data)

      // 如果礼品卡有预设使用地址，自动填入
      if (data.useLocation) {
        setUseLocation(data.useLocation)
      }
    } catch (error) {
      console.error('获取礼品卡详情失败:', error)
      Taro.showToast({
        title: '获取礼品卡详情失败',
        icon: 'error'
      })
    } finally {
      setLoading(false)
    }
  }

  // 使用礼品卡
  const handleUseGift = async () => {
    if (!gift) return

    // 根据礼品卡类型进行不同的验证
    if (gift.type === 10 && !useLocation.trim()) { // 实物礼品卡需要地址
      Taro.showToast({
        title: '请填写使用地址',
        icon: 'none'
      })
      return
    }

    setSubmitting(true)
    try {
      await useGift({
        giftId: gift.id!,
        useLocation: useLocation.trim(),
        useNote: useNote.trim()
      })

      setUseSuccess(true)
      Taro.showToast({
        title: '使用成功',
        icon: 'success'
      })
    } catch (error) {
      console.error('使用礼品卡失败:', error)
      Taro.showToast({
        title: '使用失败',
        icon: 'error'
      })
    } finally {
      setSubmitting(false)
    }
  }

  // 获取当前位置
  const handleGetLocation = () => {
    Taro.getLocation({
      type: 'gcj02',
      success: (res) => {
        // 这里可以调用地理编码API将坐标转换为地址
        // 暂时使用坐标信息
        setUseLocation(`经度:${res.longitude}, 纬度:${res.latitude}`)
        Taro.showToast({
          title: '位置获取成功',
          icon: 'success'
        })
      },
      fail: () => {
        Taro.showToast({
          title: '位置获取失败',
          icon: 'error'
        })
      }
    })
  }

  // 返回上一页
  const handleBack = () => {
    Taro.navigateBack()
  }

  // 查看我的礼品卡
  const handleViewMyGifts = () => {
    Taro.navigateTo({
      url: '/user/gift/index'
    })
  }

  // 转换礼品卡数据
  const transformGiftData = (gift: ShopGift) => {
    return {
      id: gift.id || 0,
      name: gift.name || '礼品卡',
      description: gift.description,
      code: gift.code,
      goodsImage: gift.goodsImage,
      faceValue: gift.faceValue,
      type: gift.type,
      expireTime: gift.expireTime,
      useTime: gift.useTime,
      useLocation: gift.useLocation,
      contactInfo: gift.contactInfo,
      showCode: false,
      showUseBtn: false,
      showDetailBtn: false,
      theme: 'gold' as const
    }
  }

  if (loading) {
    return (
      <ConfigProvider>
        <View className="flex justify-center items-center h-screen">
          <Text>加载中...</Text>
        </View>
      </ConfigProvider>
    )
  }

  if (!gift) {
    return (
      <ConfigProvider>
        <View className="flex flex-col justify-center items-center h-screen">
          <Text className="text-gray-500 mb-4">礼品卡不存在</Text>
          <Button onClick={handleBack}>返回</Button>
        </View>
      </ConfigProvider>
    )
  }

  return (
    <ConfigProvider>
      {/* 自定义导航栏 */}
      <View className="flex items-center justify-between p-4 bg-white border-b border-gray-100">
        <View className="flex items-center" onClick={handleBack}>
          <ArrowLeft size="20" />
          <Text className="ml-2 text-lg">使用礼品卡</Text>
        </View>
      </View>

      {!useSuccess ? (
        <>
          {/* 礼品卡信息 */}
          <View className="mx-4 mt-4">
            <GiftCard {...transformGiftData(gift)} />
          </View>

          {/* 使用表单 */}
          <View className="bg-white mx-4 mt-4 p-4 rounded-xl">
            <Text className="font-semibold mb-4 text-gray-800">使用信息</Text>

            {/* 使用地址（实物礼品卡必填） */}
            {gift.type === 10 && (
              <View className="mb-4">
                <Text className="text-gray-700 mb-2">使用地址 *</Text>
                <View className="flex gap-2">
                  <Input
                    placeholder="请输入使用地址"
                    value={useLocation}
                    onChange={setUseLocation}
                    className="flex-1 border border-gray-200 rounded-lg"
                  />
                  <Button
                    size="small"
                    fill="outline"
                    icon={<Location />}
                    onClick={handleGetLocation}
                  >
                    定位
                  </Button>
                </View>
              </View>
            )}

            {/* 虚拟礼品卡和服务礼品卡的地址选填 */}
            {gift.type !== 10 && (
              <View className="mb-4">
                <Text className="text-gray-700 mb-2">使用地址（选填）</Text>
                <Input
                  placeholder="请输入使用地址"
                  value={useLocation}
                  onChange={setUseLocation}
                  className="border border-gray-200 rounded-lg"
                />
              </View>
            )}

            {/* 使用备注 */}
            <View className="mb-4">
              <Text className="text-gray-700 mb-2">使用备注（选填）</Text>
              <TextArea
                placeholder="请输入使用备注"
                value={useNote}
                onChange={setUseNote}
                rows={3}
                className="border border-gray-200 rounded-lg"
              />
            </View>

            {/* 使用说明 */}
            <View className="bg-yellow-50 p-3 rounded-lg border border-yellow-200 mb-4">
              <Text className="text-yellow-800 text-sm">
                {gift.type === 10 && '💡 实物礼品卡使用后请到指定地址领取商品'}
                {gift.type === 20 && '💡 虚拟礼品卡使用后将自动发放到您的账户'}
                {gift.type === 30 && '💡 服务礼品卡使用后请联系客服预约服务时间'}
              </Text>
            </View>

            <Button
              type="primary"
              size="large"
              block
              loading={submitting}
              onClick={handleUseGift}
            >
              确认使用
            </Button>
          </View>
        </>
      ) : (
        /* 使用成功页面 */
        <View className="flex flex-col items-center justify-center px-4" style={{height: '600px'}}>
          <View className="text-center">
            <View className="w-20 h-20 bg-green-100 rounded-full flex items-center justify-center mx-auto mb-4">
              {/*<Voucher size="40" className="text-green-600" />*/}
            </View>

            <Text className="text-2xl font-bold text-gray-900 mb-2">使用成功！</Text>
            <Text className="text-gray-600 mb-6">
              {gift.type === 10 && '请到指定地址领取您的商品'}
              {gift.type === 20 && '虚拟商品已发放到您的账户'}
              {gift.type === 30 && '请联系客服预约服务时间'}
            </Text>

            {gift.contactInfo && (
              <View className="bg-blue-50 p-4 rounded-lg mb-6 border border-blue-200">
                <Text className="text-blue-800 font-semibold mb-1">客服联系方式</Text>
                <Text className="text-blue-700">{gift.contactInfo}</Text>
              </View>
            )}

            <View className="flex flex-col gap-3 w-full max-w-xs">
              <Button
                type="primary"
                size="large"
                block
                onClick={handleViewMyGifts}
              >
                查看我的礼品卡
              </Button>
            </View>
          </View>
        </View>
      )}
    </ConfigProvider>
  );
};

export default GiftCardUse;
