"use client"

import { useEffect, useState, useCallback } from 'react'
import { Bell, X, CheckCircle, AlertCircle, Clock, Wallet, Gift, Info } from 'lucide-react'
import { useStore } from '@/lib/store'

// 消息类型
interface NotificationMessage {
  messageId: string
  type: string
  data: {
    message?: string
    title?: string
    content?: string
    amount?: number
    commission?: number
    daysRemaining?: number
    [key: string]: unknown
  }
  timestamp: string
}

interface RealtimeNotificationProps {
  onNewMessage?: (message: NotificationMessage) => void
}

export function RealtimeNotification({ onNewMessage }: RealtimeNotificationProps) {
  const { user, isLoggedIn } = useStore()
  const [notifications, setNotifications] = useState<NotificationMessage[]>([])
  const [unreadCount, setUnreadCount] = useState(0)
  const [showPanel, setShowPanel] = useState(false)
  const [lastTimestamp, setLastTimestamp] = useState(new Date().toISOString())

  // 获取消息
  const fetchMessages = useCallback(async () => {
    if (!isLoggedIn || !user?.id) return

    try {
      const response = await fetch(
        `/api/distribution/messages?userId=${user.id}&since=${encodeURIComponent(lastTimestamp)}`
      )
      
      if (!response.ok) return

      const data = await response.json()
      
      if (data.success && data.messages?.length > 0) {
        setNotifications(prev => {
          const newMessages = data.messages.filter(
            (m: NotificationMessage) => !prev.some(p => p.messageId === m.messageId)
          )
          
          if (newMessages.length > 0) {
            // 更新未读数
            setUnreadCount(c => c + newMessages.length)
            
            // 显示Toast通知
            newMessages.forEach((msg: NotificationMessage) => {
              showToast(msg)
              onNewMessage?.(msg)
            })
            
            // 更新最后时间戳
            const latestTime = newMessages.reduce(
              (max: string, m: NotificationMessage) => m.timestamp > max ? m.timestamp : max,
              lastTimestamp
            )
            setLastTimestamp(latestTime)
            
            return [...newMessages, ...prev].slice(0, 50) // 保留最近50条
          }
          
          return prev
        })
      }
    } catch (error) {
      console.error('[RealtimeNotification] 获取消息失败:', error)
    }
  }, [isLoggedIn, user?.id, lastTimestamp, onNewMessage])

  // 轮询获取消息
  useEffect(() => {
    if (!isLoggedIn || !user?.id) return

    // 立即获取一次
    fetchMessages()

    // 每5秒轮询一次
    const intervalId = setInterval(fetchMessages, 5000)

    return () => clearInterval(intervalId)
  }, [isLoggedIn, user?.id, fetchMessages])

  // 显示Toast通知
  const showToast = (message: NotificationMessage) => {
    // 创建Toast元素
    const toast = document.createElement('div')
    toast.className = 'fixed top-20 right-4 z-[100] animate-in slide-in-from-right duration-300'
    toast.innerHTML = `
      <div class="bg-[#1a1a2e] border border-gray-700 rounded-xl p-4 shadow-xl max-w-sm">
        <div class="flex items-start gap-3">
          <div class="w-10 h-10 rounded-full ${getIconBgClass(message.type)} flex items-center justify-center flex-shrink-0">
            ${getIconSvg(message.type)}
          </div>
          <div class="flex-1 min-w-0">
            <p class="text-white font-medium text-sm">${getTitle(message.type)}</p>
            <p class="text-gray-400 text-xs mt-1 line-clamp-2">${message.data.message || message.data.content || ''}</p>
          </div>
        </div>
      </div>
    `

    document.body.appendChild(toast)

    // 3秒后移除
    setTimeout(() => {
      toast.classList.add('animate-out', 'slide-out-to-right')
      setTimeout(() => toast.remove(), 300)
    }, 3000)
  }

  // 获取图标背景色
  const getIconBgClass = (type: string): string => {
    switch (type) {
      case 'binding_expiring':
        return 'bg-orange-500/20'
      case 'binding_expired':
        return 'bg-red-500/20'
      case 'binding_converted':
      case 'earnings_added':
        return 'bg-green-500/20'
      case 'withdrawal_completed':
        return 'bg-[#38bdac]/20'
      case 'withdrawal_rejected':
        return 'bg-red-500/20'
      default:
        return 'bg-blue-500/20'
    }
  }

  // 获取图标SVG
  const getIconSvg = (type: string): string => {
    switch (type) {
      case 'binding_expiring':
        return '<svg class="w-5 h-5 text-orange-400" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"></path></svg>'
      case 'binding_expired':
        return '<svg class="w-5 h-5 text-red-400" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path></svg>'
      case 'binding_converted':
      case 'earnings_added':
        return '<svg class="w-5 h-5 text-green-400" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8c-1.657 0-3 .895-3 2s1.343 2 3 2 3 .895 3 2-1.343 2-3 2m0-8c1.11 0 2.08.402 2.599 1M12 8V7m0 1v8m0 0v1m0-1c-1.11 0-2.08-.402-2.599-1M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path></svg>'
      case 'withdrawal_completed':
        return '<svg class="w-5 h-5 text-[#38bdac]" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z"></path></svg>'
      case 'withdrawal_rejected':
        return '<svg class="w-5 h-5 text-red-400" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 14l2-2m0 0l2-2m-2 2l-2-2m2 2l2 2m7-2a9 9 0 11-18 0 9 9 0 0118 0z"></path></svg>'
      default:
        return '<svg class="w-5 h-5 text-blue-400" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path></svg>'
    }
  }

  // 获取标题
  const getTitle = (type: string): string => {
    switch (type) {
      case 'binding_expiring':
        return '绑定即将过期'
      case 'binding_expired':
        return '绑定已过期'
      case 'binding_converted':
        return '用户已付款'
      case 'earnings_added':
        return '收益增加'
      case 'withdrawal_approved':
        return '提现已通过'
      case 'withdrawal_completed':
        return '提现已到账'
      case 'withdrawal_rejected':
        return '提现被拒绝'
      case 'system_notice':
        return '系统通知'
      default:
        return '消息通知'
    }
  }

  // 获取图标组件
  const getIcon = (type: string) => {
    switch (type) {
      case 'binding_expiring':
        return <Clock className="w-5 h-5 text-orange-400" />
      case 'binding_expired':
        return <AlertCircle className="w-5 h-5 text-red-400" />
      case 'binding_converted':
      case 'earnings_added':
        return <Gift className="w-5 h-5 text-green-400" />
      case 'withdrawal_completed':
        return <CheckCircle className="w-5 h-5 text-[#38bdac]" />
      case 'withdrawal_rejected':
        return <AlertCircle className="w-5 h-5 text-red-400" />
      default:
        return <Info className="w-5 h-5 text-blue-400" />
    }
  }

  // 标记消息已读
  const markAsRead = async () => {
    if (!user?.id || notifications.length === 0) return

    const messageIds = notifications.slice(0, 10).map(n => n.messageId)
    
    try {
      await fetch('/api/distribution/messages', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ userId: user.id, messageIds }),
      })
      
      setUnreadCount(0)
    } catch (error) {
      console.error('[RealtimeNotification] 标记已读失败:', error)
    }
  }

  // 打开面板时标记已读
  const handleOpenPanel = () => {
    setShowPanel(true)
    if (unreadCount > 0) {
      markAsRead()
    }
  }

  if (!isLoggedIn || !user) return null

  return (
    <>
      {/* 通知铃铛按钮 */}
      <button
        onClick={handleOpenPanel}
        className="relative p-2 rounded-full bg-white/10 hover:bg-white/20 transition-colors"
      >
        <Bell className="w-5 h-5 text-white" />
        {unreadCount > 0 && (
          <span className="absolute -top-1 -right-1 w-5 h-5 bg-red-500 rounded-full flex items-center justify-center text-xs text-white font-bold">
            {unreadCount > 9 ? '9+' : unreadCount}
          </span>
        )}
      </button>

      {/* 通知面板 */}
      {showPanel && (
        <div className="fixed inset-0 z-50">
          <div 
            className="absolute inset-0 bg-black/60 backdrop-blur-sm"
            onClick={() => setShowPanel(false)}
          />
          
          <div className="absolute top-16 right-4 w-80 max-h-[70vh] bg-[#1a1a2e] border border-gray-700 rounded-xl shadow-2xl overflow-hidden animate-in slide-in-from-top-2 duration-200">
            {/* Header */}
            <div className="flex items-center justify-between p-4 border-b border-gray-700">
              <h3 className="text-white font-semibold">消息通知</h3>
              <button
                onClick={() => setShowPanel(false)}
                className="p-1 rounded-full hover:bg-white/10 transition-colors"
              >
                <X className="w-5 h-5 text-gray-400" />
              </button>
            </div>

            {/* 消息列表 */}
            <div className="max-h-[50vh] overflow-auto">
              {notifications.length === 0 ? (
                <div className="py-12 text-center">
                  <Bell className="w-10 h-10 text-gray-600 mx-auto mb-2" />
                  <p className="text-gray-500 text-sm">暂无消息</p>
                </div>
              ) : (
                <div className="divide-y divide-gray-700/50">
                  {notifications.map((notification) => (
                    <div 
                      key={notification.messageId}
                      className="p-4 hover:bg-white/5 transition-colors"
                    >
                      <div className="flex items-start gap-3">
                        <div className={`w-10 h-10 rounded-full ${getIconBgClass(notification.type)} flex items-center justify-center flex-shrink-0`}>
                          {getIcon(notification.type)}
                        </div>
                        <div className="flex-1 min-w-0">
                          <p className="text-white font-medium text-sm">
                            {getTitle(notification.type)}
                          </p>
                          <p className="text-gray-400 text-xs mt-1 line-clamp-2">
                            {notification.data.message || notification.data.content || ''}
                          </p>
                          <p className="text-gray-500 text-xs mt-2">
                            {new Date(notification.timestamp).toLocaleString('zh-CN')}
                          </p>
                        </div>
                      </div>
                    </div>
                  ))}
                </div>
              )}
            </div>
          </div>
        </div>
      )}
    </>
  )
}