import React, {useState, useEffect, useCallback} from 'react'
import {View, Text} from '@tarojs/components'
import {Phone, Edit, Message} from '@nutui/icons-react-taro'
import {Space, Empty, Avatar, Button} from '@nutui/nutui-react-taro'
import Taro from '@tarojs/taro'
import {useDealerUser} from '@/hooks/useDealerUser'
import {listShopDealerReferee} from '@/api/shop/shopDealerReferee'
import {pageShopDealerOrder} from '@/api/shop/shopDealerOrder'
import type {ShopDealerReferee} from '@/api/shop/shopDealerReferee/model'
import FixedButton from "@/components/FixedButton";
import navTo from "@/utils/common";
import {updateUser} from "@/api/system/user";

interface TeamMemberWithStats extends ShopDealerReferee {
  name?: string
  avatar?: string
  nickname?: string;
  alias?: string;
  phone?: string;
  orderCount?: number
  commission?: string
  status?: 'active' | 'inactive'
  subMembers?: number
  joinTime?: string
  dealerAvatar?: string;
  dealerName?: string;
  dealerPhone?: string;
}

// 层级信息接口
interface LevelInfo {
  dealerId: number
  dealerName?: string
  level: number
}

const DealerTeam: React.FC = () => {
  const [teamMembers, setTeamMembers] = useState<TeamMemberWithStats[]>([])
  const {dealerUser} = useDealerUser()
  const [dealerId, setDealerId] = useState<number>()
  // 层级栈，用于支持返回上一层
  const [levelStack, setLevelStack] = useState<LevelInfo[]>([])
  const [loading, setLoading] = useState(false)
  // 当前查看的用户名称
  const [currentDealerName, setCurrentDealerName] = useState<string>('')

  // 异步加载成员统计数据
  const loadMemberStats = async (members: TeamMemberWithStats[]) => {
    // 分批处理，避免过多并发请求
    const batchSize = 3
    for (let i = 0; i < members.length; i += batchSize) {
      const batch = members.slice(i, i + batchSize)

      const batchStats = await Promise.all(
        batch.map(async (member) => {
          try {
            // 并行获取订单统计和下级成员数量
            const [orderResult, subMembersResult] = await Promise.all([
              pageShopDealerOrder({
                page: 1,
                userId: member.userId
              }),
              listShopDealerReferee({
                dealerId: member.userId,
                deleted: 0
              })
            ])

            let orderCount = 0
            let commission = '0.00'
            let status: 'active' | 'inactive' = 'inactive'

            if (orderResult?.list) {
              const orders = orderResult.list
              orderCount = orders.length
              commission = orders.reduce((sum, order) => {
                const levelCommission = member.level === 1 ? order.firstMoney :
                  member.level === 2 ? order.secondMoney :
                    order.thirdMoney
                return sum + parseFloat(levelCommission || '0')
              }, 0).toFixed(2)

              // 判断活跃状态（30天内有订单为活跃）
              const thirtyDaysAgo = new Date()
              thirtyDaysAgo.setDate(thirtyDaysAgo.getDate() - 30)
              const hasRecentOrder = orders.some(order =>
                new Date(order.createTime || '') > thirtyDaysAgo
              )
              status = hasRecentOrder ? 'active' : 'inactive'
            }

            return {
              ...member,
              orderCount,
              commission,
              status,
              subMembers: subMembersResult?.length || 0
            }
          } catch (error) {
            console.error(`获取成员${member.userId}数据失败:`, error)
            return {
              ...member,
              orderCount: 0,
              commission: '0.00',
              status: 'inactive' as const,
              subMembers: 0
            }
          }
        })
      )

      // 更新这一批成员的数据
      setTeamMembers(prevMembers => {
        const updatedMembers = [...prevMembers]
        batchStats.forEach(updatedMember => {
          const index = updatedMembers.findIndex(m => m.userId === updatedMember.userId)
          if (index !== -1) {
            updatedMembers[index] = updatedMember
          }
        })
        return updatedMembers
      })

      // 添加小延迟，避免请求过于密集
      if (i + batchSize < members.length) {
        await new Promise(resolve => setTimeout(resolve, 100))
      }
    }
  }

  // 获取团队数据
  const fetchTeamData = useCallback(async () => {
    if (!dealerUser?.userId && !dealerId) return

    try {
      setLoading(true)
      console.log(dealerId, 'dealerId>>>>>>>>>')
      // 获取团队成员关系
      const refereeResult = await listShopDealerReferee({
        dealerId: dealerId ? dealerId : dealerUser?.userId
      })

      if (refereeResult) {
        console.log('团队成员原始数据:', refereeResult)
        // 处理团队成员数据
        const processedMembers: TeamMemberWithStats[] = refereeResult.map(member => ({
          ...member,
          name: `${member.userId}`,
          orderCount: 0,
          commission: '0.00',
          status: 'active' as const,
          subMembers: 0,
          joinTime: member.createTime
        }))

        // 先显示基础数据，然后异步加载详细统计
        setTeamMembers(processedMembers)
        setLoading(false)

        // 异步加载每个成员的详细统计数据
        loadMemberStats(processedMembers)

      }
    } catch (error) {
      console.error('获取团队数据失败:', error)
      Taro.showToast({
        title: '获取团队数据失败',
        icon: 'error'
      })
    } finally {
      setLoading(false)
    }
  }, [dealerUser?.userId, dealerId])

  // 查看下级成员
  const getNextUser = (item: TeamMemberWithStats) => {
    // 检查层级限制：最多只能查看2层（levelStack.length >= 1 表示已经是第2层了）
    if (levelStack.length >= 1) {
      return
    }

    // 如果没有下级成员，不允许点击
    if (!item.subMembers || item.subMembers === 0) {
      return
    }

    console.log('点击用户:', item.userId, item.name)

    // 将当前层级信息推入栈中
    const currentLevel: LevelInfo = {
      dealerId: dealerId || dealerUser?.userId || 0,
      dealerName: currentDealerName || (dealerId ? '上级' : dealerUser?.realName || '我'),
      level: levelStack.length
    }
    setLevelStack(prev => [...prev, currentLevel])

    // 切换到下级
    setDealerId(item.userId)
    setCurrentDealerName(item.nickname || item.dealerName || `用户${item.userId}`)
  }

  // 返回上一层
  const goBack = () => {
    if (levelStack.length === 0) {
      // 如果栈为空，返回首页或上一页
      Taro.navigateBack()
      return
    }

    // 从栈中弹出上一层信息
    const prevLevel = levelStack[levelStack.length - 1]
    setLevelStack(prev => prev.slice(0, -1))

    if (prevLevel.dealerId === (dealerUser?.userId || 0)) {
      // 返回到根层级
      setDealerId(undefined)
      setCurrentDealerName('')
    } else {
      setDealerId(prevLevel.dealerId)
      setCurrentDealerName(prevLevel.dealerName || '')
    }
  }

  // 一键拨打
  const makePhoneCall = (phone: string) => {
    Taro.makePhoneCall({
      phoneNumber: phone,
      fail: () => {
        Taro.showToast({
          title: '拨打取消',
          icon: 'error'
        });
      }
    });
  };

  // 别名备注
  const editAlias = (item: any, index: number) => {
    Taro.showModal({
      title: '备注',
      // @ts-ignore
      editable: true,
      placeholderText: '真实姓名',
      content: item.alias || '',
      success: async (res: any) => {
        if (res.confirm && res.content !== undefined) {
          try {
            // 更新跟进情况
            await updateUser({
              userId: item.userId,
              alias: res.content.trim()
            });
            teamMembers[index].alias = res.content.trim()
            setTeamMembers(teamMembers)
          } catch (error) {
            console.error('备注失败:', error);
            Taro.showToast({
              title: '备注失败，请重试',
              icon: 'error'
            });
          }
        }
      }
    });
  };

  // 发送消息
  const sendMessage = (item: TeamMemberWithStats) => {
    return navTo(`/user/chat/message/add?id=${item.userId}`, true)
  }

  // 监听数据变化，获取团队数据
  useEffect(() => {
    if (dealerUser?.userId || dealerId) {
      fetchTeamData().then()
    }
  }, [fetchTeamData])

  // 初始化当前用户名称
  useEffect(() => {
    if (!dealerId && dealerUser?.realName && !currentDealerName) {
      setCurrentDealerName(dealerUser.realName)
    }
  }, [dealerUser, dealerId, currentDealerName])

  const renderMemberItem = (member: TeamMemberWithStats, index: number) => {
    // 判断是否可以点击：有下级成员且未达到层级限制
    const canClick = member.subMembers && member.subMembers > 0 && levelStack.length < 1
    // 判断是否显示手机号：只有本级（levelStack.length === 0）才显示
    const showPhone = levelStack.length === 0
    // 判断数据是否还在加载中（初始值都是0或'0.00'）
    const isStatsLoading = member.orderCount === 0 && member.commission === '0.00' && member.subMembers === 0

    return (
      <View
        key={member.id}
        className={`bg-white rounded-lg p-4 mb-3 shadow-sm ${
          canClick ? 'cursor-pointer' : 'cursor-default opacity-75'
        }`}
        onClick={() => getNextUser(member)}
      >
        <View className="flex items-center mb-3">
          <Avatar
            size="40"
            src={member.avatar}
            className="mr-3"
          />
          <View className="flex-1">
            <View className="flex items-center justify-between mb-1">
              <View className="flex items-center">
                <Space>
                  {member.alias ? <Text className="font-semibold text-blue-700 mr-2">{member.alias}</Text> :
                    <Text className="font-semibold text-gray-800 mr-2">{member.nickname}</Text>}
                  {/*别名备注*/}
                  <Edit size={16} className={'text-blue-500 mr-2'} onClick={(e) => {
                    e.stopPropagation()
                    editAlias(member, index)
                  }}/>
                  {/*发送消息*/}
                  <Message size={16} className={'text-orange-500 mr-2'} onClick={(e) => {
                    e.stopPropagation()
                    sendMessage(member)
                  }}/>
                </Space>
              </View>
              {/* 显示手机号（仅本级可见） */}
              {showPhone && member.phone && (
                <Text className="text-sm text-gray-500" onClick={(e) => {
                  e.stopPropagation();
                  makePhoneCall(member.phone || '');
                }}>
                  {member.phone}
                  <Phone size={12} className="ml-1 text-green-500"/>
                </Text>
              )}
            </View>
            <Space>
              <Text>
                <Text className="text-xs text-gray-500">UID：{member.userId}</Text>
              </Text>
              <Text className="text-xs text-gray-500">
                加入时间：{member.joinTime}
              </Text>
            </Space>
          </View>
        </View>

        <View className="grid grid-cols-3 gap-4 text-center">
          <Space>
            <Text className="text-xs text-gray-500">订单数</Text>
            <Text className="text-sm font-semibold text-blue-600">
              {isStatsLoading ? '-' : member.orderCount}
            </Text>
          </Space>
          <Space>
            <Text className="text-xs text-gray-500">贡献佣金</Text>
            <Text className="text-sm font-semibold text-green-600">
              {isStatsLoading ? '-' : `¥${member.commission}`}
            </Text>
          </Space>
          <Space>
            <Text className="text-xs text-gray-500">团队成员</Text>
            <Text className={`text-sm font-semibold ${
              canClick ? 'text-purple-600' : 'text-gray-400'
            }`}>
              {isStatsLoading ? '-' : (member.subMembers || 0)}
            </Text>
          </Space>
        </View>
      </View>
    )
  }

  const renderOverview = () => (
    <View className="rounded-xl p-4">
      <View
        className={'bg-white rounded-lg py-2 px-4 mb-3 shadow-sm text-right text-sm font-medium flex justify-between items-center'}>
        <Text className="text-lg font-semibold">我的团队成员</Text>
        <Text className={'text-gray-500 '}>成员数：{teamMembers.length}</Text>
      </View>
      {teamMembers.map(renderMemberItem)}
    </View>
  )

  // 渲染顶部导航栏
  const renderHeader = () => {
    if (levelStack.length === 0) return null

    return (
      <View className="bg-white p-4 mb-3 shadow-sm">
        <View className="flex items-center justify-between">
          <View className="flex items-center">
            <Text className="text-lg font-semibold">
              {currentDealerName}的团队成员
            </Text>
          </View>
          <Button
            size="small"
            type="primary"
            onClick={goBack}
            className="bg-blue-500"
          >
            返回上一层
          </Button>
        </View>
      </View>
    )
  }

  if (!dealerUser) {
    return (
      <Space className="flex items-center justify-center">
        <Empty description="您还不是业务人员" style={{
          backgroundColor: 'transparent'
        }} actions={[{text: '立即申请', onClick: () => navTo(`/dealer/apply/add`, true)}]}
        />
      </Space>
    )
  }

  return (
    <>
      {renderHeader()}

      {loading ? (
        <View className="flex items-center justify-center mt-20">
          <Text className="text-gray-500">加载中...</Text>
        </View>
      ) : teamMembers.length > 0 ? (
        renderOverview()
      ) : (
        <View className="flex items-center justify-center mt-20">
          <Empty description="暂无成员" style={{
            backgroundColor: 'transparent'
          }}/>
        </View>
      )}

      <FixedButton text={'立即邀请'} onClick={() => navTo(`/dealer/qrcode/index`, true)}/>
    </>
  )
}

export default DealerTeam;
