'use client'

import { useEffect, useState, Suspense } from 'react'
import { useRouter, useSearchParams } from 'next/navigation'
import { signIn } from 'next-auth/react'

function DingtalkCallbackContent() {
  const router = useRouter()
  const searchParams = useSearchParams()
  const [status, setStatus] = useState<'loading' | 'success' | 'error'>('loading')
  const [message, setMessage] = useState('正在处理钉钉登录...')

  useEffect(() => {
    const handleDingtalkLogin = async () => {
      try {
        const code = searchParams.get('code')
        const state = searchParams.get('state') || 'default'

        if (!code) {
          throw new Error('授权失败：缺少授权码')
        }

        // 解析state参数，获取原始访问地址
        let originUrl = ''
        try {
          const stateData = JSON.parse(decodeURIComponent(state))
          originUrl = stateData.origin || ''
        } catch (e) {
          // state解析失败，忽略
        }

        setMessage('正在验证授权信息...')

        // 调用钉钉登录接口
        const response = await fetch('/api/dingtalk/login', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ code, state }),
        })

        const data = await response.json()

        if (!response.ok || !data.success) {
          throw new Error(data.message || '登录失败')
        }

        // 检查是否需要完善信息
        if (data.needCompleteProfile) {
          setMessage('首次登录，正在跳转到信息完善页面...')
          setStatus('success')

          // 跳转到信息完善页面
          const userInfoParam = encodeURIComponent(JSON.stringify(data.user))
          setTimeout(() => {
            if (window.parent !== window) {
              // 在 iframe 中，通知父窗口跳转
              window.parent.postMessage(
                {
                  type: 'dingtalk_need_complete_profile',
                  userInfo: data.user,
                },
                '*'
              )
            } else {
              router.push(`/complete-profile?userInfo=${userInfoParam}`)
            }
          }, 1000)
          return
        }

        setMessage('登录成功，正在跳转...')
        setStatus('success')

        // 检查来源：优先使用state中的origin，其次使用referrer
        const isFromIntranet = originUrl && originUrl.includes('192.168.')

        // 通知父窗口登录成功（如果在 iframe 中）
        if (window.parent !== window) {
          window.parent.postMessage(
            {
              type: 'dingtalk_login_success',
              userInfo: data.user,
              originUrl: originUrl // 携带原始地址
            },
            '*'
          )
        } else {
          // 不在 iframe 中（直接访问回调页面）
          if (isFromIntranet) {
            // 从内网来的：不在这里创建session，跳转回内网后由内网页面创建
            setMessage('登录成功，正在返回内网...')
            // 将用户信息作为参数传递，让内网页面创建session
            window.location.href = `${originUrl}/login?dingtalk_success=true&email=${encodeURIComponent(data.user.email)}`
          } else {
            // 从外网来的：直接创建session并跳转
            const signInResult = await signIn('credentials', {
              email: data.user.email,
              password: 'dingtalk_auto_login',
              redirect: false,
            })

            if (signInResult?.error) {
              throw new Error(signInResult.error)
            }

            setTimeout(() => {
              router.push('/')
              router.refresh()
            }, 1000)
          }
        }
      } catch (error: any) {
        console.error('钉钉登录错误:', error)
        setStatus('error')
        setMessage(error.message || '登录失败，请稍后再试')

        // 3秒后关闭或跳转
        setTimeout(() => {
          if (window.parent !== window) {
            window.parent.postMessage({ type: 'dingtalk_login_error', message: error.message }, '*')
          } else {
            router.push('/login')
          }
        }, 3000)
      }
    }

    handleDingtalkLogin()
  }, [searchParams, router])

  return (
    <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-blue-50 to-blue-100">
      <div className="max-w-md w-full bg-white rounded-2xl shadow-xl p-8">
        <div className="text-center">
          {status === 'loading' && (
            <div className="mb-4">
              <div className="inline-block animate-spin rounded-full h-12 w-12 border-4 border-blue-500 border-t-transparent"></div>
            </div>
          )}
          
          {status === 'success' && (
            <div className="mb-4">
              <svg className="mx-auto h-12 w-12 text-green-500" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M5 13l4 4L19 7" />
              </svg>
            </div>
          )}
          
          {status === 'error' && (
            <div className="mb-4">
              <svg className="mx-auto h-12 w-12 text-red-500" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
              </svg>
            </div>
          )}
          
          <h2 className={`text-xl font-semibold mb-2 ${
            status === 'error' ? 'text-red-600' : 'text-slate-800 dark:text-slate-200'
          }`}>
            {status === 'loading' && '钉钉登录'}
            {status === 'success' && '登录成功'}
            {status === 'error' && '登录失败'}
          </h2>
          
          <p className="text-slate-600 dark:text-slate-400">{message}</p>
        </div>
      </div>
    </div>
  )
}

export default function DingtalkCallbackPage() {
  return (
    <Suspense fallback={
      <div className="min-h-screen flex items-center justify-center bg-gradient-to-br from-blue-50 to-blue-100">
        <div className="max-w-md w-full bg-white rounded-2xl shadow-xl p-8">
          <div className="text-center">
            <div className="mb-4">
              <div className="inline-block animate-spin rounded-full h-12 w-12 border-4 border-blue-500 border-t-transparent"></div>
            </div>
            <h2 className="text-xl font-semibold mb-2 text-slate-800 dark:text-slate-200">钉钉登录</h2>
            <p className="text-slate-600 dark:text-slate-400">正在加载...</p>
          </div>
        </div>
      </div>
    }>
      <DingtalkCallbackContent />
    </Suspense>
  )
}