'use client';

import { useEffect, useState } from 'react';
import { useRouter } from 'next/navigation';
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import { useToast } from '@/hooks/use-toast';
import { useTranslations } from "next-intl";
import { User, Mail, Calendar, LogOut, Edit, Save, X, Coins, ImageIcon, Plus, Minus, Crown } from 'lucide-react';
import { useAuth } from "@/components/providers"

interface UserInfo {
  id: string;
  email: string;
  username: string | null;
  isEmailVerified: boolean;
  credits: number;
  subscriptionCredits: number;
  subscriptionStatus: string | null;
  subscriptionPlan: string | null;
  subscriptionStartDate: string | null;
  subscriptionEndDate: string | null;
}

interface CreditActivity {
  id: string;
  type: string;
  description: string;
  creditAmount: number | null;
  metadata: string | null;
  createdAt: string;
}

interface DashboardContentProps {
  locale: string;
}

export default function DashboardContent({ locale }: DashboardContentProps) {
  const { user, isLoading, refreshUser } = useAuth()
  const router = useRouter()
  const t = useTranslations("dashboard")
  const { toast } = useToast()
  const tErrors = useTranslations("auth.errors")
  const tCredit = useTranslations('credit_description')
  const [isEditing, setIsEditing] = useState(false)
  const [editUsername, setEditUsername] = useState('')
  const [isSaving, setIsSaving] = useState(false)
  const [activities, setActivities] = useState<CreditActivity[]>([])
  const [isLoadingActivities, setIsLoadingActivities] = useState(true)
  const [isSubscribing, setIsSubscribing] = useState(false)

  useEffect(() => {
    const fetchActivities = async () => {
      try {
        const response = await fetch('/api/user/activities?limit=10', {
          method: 'GET',
          credentials: 'include',
        })
        
        if (response.ok) {
          const data = await response.json()
          setActivities(data.activities || [])
        } else {
          console.error('获取活动记录失败:', response.status)
        }
      } catch (error) {
        console.error('获取活动记录出错:', error)
      } finally {
        setIsLoadingActivities(false)
      }
    }

    fetchActivities()
  }, [])

  // 格式化时间
  const formatDate = (dateString: string) => {
    const date = new Date(dateString)
    const now = new Date()
    const diffTime = Math.abs(now.getTime() - date.getTime())
    const diffMinutes = Math.ceil(diffTime / (1000 * 60))
    const diffHours = Math.ceil(diffTime / (1000 * 60 * 60))
    const diffDays = Math.ceil(diffTime / (1000 * 60 * 60 * 24))

    if (diffMinutes < 60) {
      return `${diffMinutes} ${locale === 'zh' ? '分钟前' : 'minutes ago'}`
    } else if (diffHours < 24) {
      return `${diffHours} ${locale === 'zh' ? '小时前' : 'hours ago'}`
    } else if (diffDays < 7) {
      return `${diffDays} ${locale === 'zh' ? '天前' : 'days ago'}`
    } else {
      return date.toLocaleDateString(locale === 'zh' ? 'zh-CN' : 'en-US', {
        year: 'numeric',
        month: 'short',
        day: 'numeric',
        hour: '2-digit',
        minute: '2-digit',
      })
    }
  }

  // 获取活动图标
  const getActivityIcon = (type: string) => {
    switch (type) {
      case 'credit_deduct':
        return <Minus className="h-4 w-4 text-red-500" />
      case 'credit_add':
        return <Plus className="h-4 w-4 text-green-500" />
      case 'registration_bonus':
        return <Plus className="h-4 w-4 text-green-500" />
      case 'image_generation':
      case 'image_edit':
      case 'multi_image_edit':
        return <ImageIcon className="h-4 w-4 text-blue-500" />
      case 'login':
        return <User className="h-4 w-4 text-gray-500" />
      default:
        return <Coins className="h-4 w-4 text-gray-400" />
    }
  }

  // 获取活动类型描述
  const getActivityTypeText = (type: string) => {
    switch (type) {
      case 'credit_deduct':
        return t('activityTypes.credit_deduct')
      case 'credit_add':
        return t('activityTypes.credit_add')
      case 'image_generation':
      case 'image_edit':
      case 'multi_image_edit':
        return t('activityTypes.image_generation')
      case 'login':
        return t('activityTypes.login')
      case 'registration_bonus':
        return t('activityTypes.registration_bonus')
      default:
        return t('activityTypes.other')
    }
  }

  // 格式化活动描述
  const formatActivityDescription = (activity: CreditActivity) => {
    const { description } = activity
    
    // 如果是翻译键格式
    if (description.startsWith('credit_description.')) {
      const key = description.replace('credit_description.', '')
      
      // 处理特殊的图片编辑格式: credit_description.image_edit:具体内容
      if (key.startsWith('image_edit:')) {
        const content = key.replace('image_edit:', '')
        return `${tCredit('image_edit')}: ${content}`
      }
      
      // 处理多图编辑格式: credit_description.multi_image_edit:具体内容
      if (key.startsWith('multi_image_edit:')) {
        const content = key.replace('multi_image_edit:', '')
        return `${tCredit('image_edit')}: ${content}`
      }
      
      // 处理多图编辑的默认格式，显示为"图片编辑"而不是"多图编辑"
      if (key === 'multi_image_edit') {
        // 尝试从metadata中获取prompt信息
        try {
          const metadata = activity.metadata ? JSON.parse(activity.metadata) : null
          if (metadata && metadata.prompt) {
            return `${tCredit('image_edit')}: ${metadata.prompt}`
          }
        } catch (e) {
          // 忽略JSON解析错误
        }
        return tCredit('image_edit')
      }
      
      // 直接翻译键
      try {
        if (key === 'registration_bonus') {
          return tCredit('registration_bonus')
        } else if (key === 'background_removal') {
          return tCredit('background_removal')
        } else if (key === 'image_edit') {
          return tCredit('image_edit')
        } else if (key === 'subscription_activated') {
          return tCredit('subscription_activated')
        } else if (key === 'purchase_credits') {
          return tCredit('purchase_credits')
        } else if (key === 'subscription_expired') {
          return tCredit('subscription_expired')
        }
      } catch (error) {
        console.log('Translation not found for key:', key)
      }
    }
    
    // 兼容旧格式，直接返回描述
    return description
  }

  const handleEditProfile = () => {
    setIsEditing(true)
  }

  const handleCancelEdit = () => {
    setIsEditing(false)
    setEditUsername(user?.username || '')
  }

  const handleSaveProfile = async () => {
    if (!user) return

    setIsSaving(true)
    try {
      const response = await fetch('/api/auth/update-profile', {
        method: 'PUT',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          username: editUsername.trim() || null,
        }),
      })

      if (response.ok) {
        const updatedData = await response.json()
        refreshUser()
        setIsEditing(false)
        // 重新获取活动记录
        const fetchActivitiesAgain = async () => {
          try {
            const response = await fetch('/api/user/activities?limit=10', {
              method: 'GET',
              credentials: 'include',
            })
            
            if (response.ok) {
              const data = await response.json()
              setActivities(data.activities || [])
            }
          } catch (error) {
            console.error('获取活动记录出错:', error)
          }
        }
        fetchActivitiesAgain()
        toast({
          title: t('profileUpdated'),
          description: t('profileUpdatedDesc'),
        })
      } else {
        const errorData = await response.json()
        toast({
          title: t('updateFailed'),
          description: errorData.error || t('updateError'),
          variant: 'destructive',
        })
      }
    } catch (error) {
      toast({
        title: t('updateFailed'),
        description: t('networkError'),
        variant: 'destructive',
      })
    } finally {
      setIsSaving(false)
    }
  }

  const handleLogout = async () => {
    try {
      const response = await fetch('/api/auth/logout', {
        method: 'POST',
      })

      if (response.ok) {
        toast({
          title: t('logoutSuccess'),
          description: t('logoutSuccess'),
        })
        router.push(`/${locale}`)
        router.refresh()
      } else {
        toast({
          title: t('logoutFailed'),
          description: t('logoutError'),
          variant: 'destructive',
        })
      }
    } catch (error) {
      toast({
        title: t('logoutFailed'),
        description: tErrors('networkError'),
        variant: 'destructive',
      })
    }
  }

  const handleSubscribe = async () => {
    setIsSubscribing(true)
    try {
      const response = await fetch('/api/create-checkout-session', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          locale,
        }),
      })

      const data = await response.json()

      if (!response.ok) {
        // 处理翻译键错误消息
        const errorMessage = data.error === 'alreadySubscribed' 
          ? '您已有活跃订阅，无需重复订阅'
          : data.error || '创建支付会话失败'
        throw new Error(errorMessage)
      }

      // 跳转到 Stripe Checkout 页面
      if (data.url) {
        window.location.href = data.url
      }
    } catch (error: any) {
      console.error('Error creating checkout session:', error)
      toast({
        title: '订阅失败',
        description: error.message || '创建支付会话时发生错误',
        variant: 'destructive',
      })
    } finally {
      setIsSubscribing(false)
    }
  }

  // 如果正在加载，显示加载状态
  if (isLoading) {
    return (
      <div className="min-h-screen bg-gradient-to-br from-blue-50 to-indigo-100 dark:from-gray-900 dark:to-gray-800 flex items-center justify-center">
        <div className="text-center">
          <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-600 mx-auto mb-4"></div>
          <p className="text-gray-600 dark:text-gray-400">{t("loading")}</p>
        </div>
      </div>
    )
  }

  // 如果未登录，重定向到登录页
  if (!user) {
    router.push(`/${locale}/auth/login`)
    return null
  }

  return (
    <div className="bg-gray-50 py-8">
      <div className="max-w-4xl mx-auto px-4 sm:px-6 lg:px-8">
        <div className="mb-8">
          <h1 className="text-3xl font-bold text-gray-900">{t('title')}</h1>
          <p className="mt-2 text-gray-600">{t('welcome')}，{user?.username || t('user')}！</p>
        </div>

        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-4 gap-6 mb-8">
          <Card>
            <CardHeader className="pb-2">
              <CardTitle className="text-sm font-medium">{t('personalInfo')}</CardTitle>
            </CardHeader>
            <CardContent>
              <div className="space-y-3">
                <div className="flex items-start space-x-2">
                  <Mail className="h-4 w-4 text-gray-500 mt-0.5 flex-shrink-0" />
                  <span className="text-sm text-gray-700 break-all leading-relaxed">{user?.email}</span>
                </div>
                <div className="flex items-center space-x-2">
                  <User className="h-4 w-4 text-gray-500 flex-shrink-0" />
                  <span className="text-sm text-gray-700 truncate">{user?.username || t('nameNotSet')}</span>
                </div>
                <div className="flex items-center space-x-2">
                  <Calendar className="h-4 w-4 text-gray-500 flex-shrink-0" />
                  <span className={`text-xs px-2 py-1 rounded-full flex-shrink-0 ${
                    user?.isEmailVerified 
                      ? 'bg-green-100 text-green-800' 
                      : 'bg-red-100 text-red-800'
                  }`}>
                    {user?.isEmailVerified ? t('verified') : t('unverified')}
                  </span>
                </div>
              </div>
            </CardContent>
          </Card>

          <Card className="col-span-1">
            <CardHeader className="bg-gradient-to-r from-orange-500 to-red-500 text-white rounded-t-lg">
              <CardTitle className="text-base font-medium">{t('creditBalance')}</CardTitle>
            </CardHeader>
            <CardContent className="p-4">
              <div className="space-y-3">
                {/* 永久积分 */}
                <div>
                  <div className="text-xl font-bold text-orange-600">
                    {user?.credits || 0}
                  </div>
                  <p className="text-xs text-gray-500">{t('permanentCredits')}</p>
                </div>
                
                {/* 订阅积分 */}
                {user?.subscriptionStatus === 'active' && (
                  <div>
                    <div className="text-xl font-bold text-blue-600">
                      {user?.subscriptionCredits || 0}
                    </div>
                    <p className="text-xs text-gray-500">{t('subscriptionCredits')}</p>
                  </div>
                )}
                
                {/* 总积分 */}
                <div className="border-t pt-2">
                  <div className="text-lg font-semibold text-green-600">
                    {(user?.credits || 0) + (user?.subscriptionCredits || 0)}
                  </div>
                  <p className="text-xs text-gray-500">{t('totalCredits')}</p>
                </div>
              </div>
            </CardContent>
          </Card>

          <Card>
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <CardTitle className="text-sm font-medium">{t('subscriptionStatus')}</CardTitle>
            </CardHeader>
            <CardContent>
              <div className="space-y-3">
                {user?.subscriptionStatus === 'active' ? (
                  <>
                    <div className="flex items-center space-x-2">
                      <Crown className="h-4 w-4 text-yellow-500" />
                      <span className="text-sm font-medium text-green-600">
                        Pro {t('membershipActive')}
                      </span>
                    </div>
                    <div className="text-xs text-gray-500">
                      {t('expiresAt')}: {user?.subscriptionEndDate ? 
                        new Date(user.subscriptionEndDate).toLocaleDateString(locale === 'zh' ? 'zh-CN' : 'en-US') 
                        : t('unknown')}
                    </div>
                    <div className="text-xs text-gray-500">
                      {t('nextBilling')}: {user?.subscriptionEndDate ? 
                        new Date(user.subscriptionEndDate).toLocaleDateString(locale === 'zh' ? 'zh-CN' : 'en-US') 
                        : t('unknown')}
                    </div>
                  </>
                ) : (
                  <>
                    <p className="text-sm text-gray-600">
                      {t('freeVersion')}
                    </p>
                    <p className="text-xs text-gray-500">
                      {t('upgradeToGetMoreFeatures')}
                    </p>
                  </>
                )}
                
                {/* 订阅按钮 */}
                <Button 
                  className={`w-full text-sm ${
                    user?.subscriptionStatus === 'active' 
                      ? 'bg-gray-400 hover:bg-gray-500 cursor-not-allowed' 
                      : 'bg-gradient-to-r from-blue-500 to-purple-600 hover:from-blue-600 hover:to-purple-700'
                  } text-white`}
                  onClick={handleSubscribe}
                  disabled={isSubscribing || user?.subscriptionStatus === 'active'}
                  size="sm"
                >
                  <Crown className="h-4 w-4 mr-2" />
                  {isSubscribing ? t('processing') : user?.subscriptionStatus === 'active' ? t('subscribedPro') : t('subscribePro')}
                </Button>
              </div>
            </CardContent>
          </Card>

          <Card>
            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
              <CardTitle className="text-sm font-medium">{t('quickActions')}</CardTitle>
            </CardHeader>
            <CardContent>
              <div className="space-y-2">
                <Button 
                  variant="outline" 
                  className="w-full justify-start" 
                  size="sm"
                  onClick={handleEditProfile}
                >
                  <Edit className="h-4 w-4 mr-2" />
                  {t('editProfile')}
                </Button>
                <Button 
                  variant="outline" 
                  className="w-full justify-start text-red-600 hover:text-red-700" 
                  size="sm"
                  onClick={handleLogout}
                >
                  <LogOut className="h-4 w-4 mr-2" />
                  {t('logout')}
                </Button>
              </div>
            </CardContent>
          </Card>
        </div>

        {/* 编辑个人资料卡片 */}
        {isEditing && (
          <Card className="mb-8">
            <CardHeader>
              <CardTitle>{t('editProfileTitle')}</CardTitle>
              <CardDescription>
                {t('editProfileDesc')}
              </CardDescription>
            </CardHeader>
            <CardContent>
              <div className="space-y-4">
                <div className="space-y-2">
                  <Label htmlFor="editUsername">{t('usernameLabel')}</Label>
                  <Input
                    id="editUsername"
                    type="text"
                    placeholder={t('usernamePlaceholder')}
                    value={editUsername}
                    onChange={(e) => setEditUsername(e.target.value)}
                    disabled={isSaving}
                  />
                </div>
                <div className="space-y-2">
                  <Label htmlFor="editEmail">{t('emailLabel')}</Label>
                  <Input
                    id="editEmail"
                    type="email"
                    value={user?.email || ''}
                    disabled
                    className="bg-gray-50"
                  />
                  <p className="text-xs text-gray-500">{t('emailCannotModify')}</p>
                </div>
                <div className="flex space-x-2">
                  <Button
                    onClick={handleSaveProfile}
                    disabled={isSaving}
                    className="flex items-center"
                  >
                    <Save className="h-4 w-4 mr-2" />
                    {isSaving ? t('saving') : t('save')}
                  </Button>
                  <Button
                    variant="outline"
                    onClick={handleCancelEdit}
                    disabled={isSaving}
                    className="flex items-center"
                  >
                    <X className="h-4 w-4 mr-2" />
                    {t('cancel')}
                  </Button>
                </div>
              </div>
            </CardContent>
          </Card>
        )}

        <Card>
          <CardHeader>
            <CardTitle>{t('recentActivity')}</CardTitle>
            <CardDescription>
              {t('recentActivityDesc')}
            </CardDescription>
          </CardHeader>
          <CardContent>
            <div className="space-y-4">
              {isLoadingActivities ? (
                <div className="text-center py-8">
                  <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-blue-600 mx-auto"></div>
                  <p className="mt-2 text-sm text-gray-500">{t('loadingActivities')}</p>
                </div>
              ) : activities.length > 0 ? (
                activities.map((activity) => (
                  <div key={activity.id} className="flex items-center space-x-4 p-4 bg-gray-50 rounded-lg">
                    <div className="flex-shrink-0">
                      {getActivityIcon(activity.type)}
                    </div>
                    <div className="flex-1 min-w-0">
                      <div className="flex items-center justify-between">
                        <p className="text-sm font-medium text-gray-900 truncate">
                          {formatActivityDescription(activity)}
                        </p>
                        {activity.creditAmount && (
                          <span className={`text-sm font-semibold ml-2 ${
                            activity.creditAmount > 0 
                              ? 'text-green-600' 
                              : 'text-red-600'
                          }`}>
                            {activity.creditAmount > 0 ? '+' : ''}{activity.creditAmount} {locale === 'zh' ? '积分' : 'credits'}
                          </span>
                        )}
                      </div>
                      <div className="flex items-center justify-between mt-1">
                        <p className="text-xs text-gray-500">
                          {getActivityTypeText(activity.type)}
                        </p>
                        <p className="text-xs text-gray-400">
                          {formatDate(activity.createdAt)}
                        </p>
                      </div>
                    </div>
                  </div>
                ))
              ) : (
                <div className="text-center text-gray-500 py-8">
                  <Coins className="h-12 w-12 text-gray-300 mx-auto mb-3" />
                  <p className="text-sm">{t('noActivities')}</p>
                  <p className="text-xs text-gray-400 mt-1">{t('noActivitiesDesc')}</p>
                </div>
              )}
            </div>
          </CardContent>
        </Card>
      </div>
    </div>
  )
}