import { useEffect, useState } from 'react'
import { useNavigate } from 'react-router-dom'
import { Toast } from 'antd-mobile'
import { useUserStore } from '@/stores/user'
import QRCodeLogin from './QRCodeLogin'
import styles from './login.module.css'

// 声明飞书 JSAPI 类型
declare global {
  interface Window {
    tt?: any
    h5sdk?: {
      ready: (callback: () => void) => void
    }
  }
}

export default function Login() {
  const navigate = useNavigate()
  const { login } = useUserStore()
  const [loading, setLoading] = useState(true)
  const [environment, setEnvironment] = useState<'feishu' | 'external' | null>(null)
  const [showQRCode, setShowQRCode] = useState(false)

  // 检查登录状态
  useEffect(() => {
    const token = localStorage.getItem('token')
    const urlParams = new URLSearchParams(window.location.search)
    const redirect = urlParams.get('redirect')

    if (token) {
      if (redirect) {
        window.location.href = redirect
      } else {
        navigate('/dashboard')
      }
      return
    }

    // 监听飞书登录成功事件
    const handleFeishuLoginSuccess = ((e: any) => {
      const { user, token } = e.detail
      login(user, token)
    }) as EventListener

    window.addEventListener('feishu-login-success', handleFeishuLoginSuccess)
    return () => {
      window.removeEventListener('feishu-login-success', handleFeishuLoginSuccess)
    }
  }, [login, navigate])

  // 环境检测和免登
  useEffect(() => {
    const ua = navigator.userAgent
    const isInFeishu = ua.includes('Lark') || ua.includes('feishu') || ua.includes('lark')
    const urlParams = new URLSearchParams(window.location.search)
    const authCode = urlParams.get('auth_code')
    const companyParam = urlParams.get('company')

    // 如果 URL 中有授权码，直接处理登录
    if (authCode) {
      handleFeishuLogin(authCode, companyParam || undefined)
      return
    }

    if (isInFeishu) {
      // 飞书内环境，尝试免登
      setEnvironment('feishu')
      attemptFeishuAutoLogin(companyParam || undefined)
    } else {
      // 飞书外环境，显示登录选项
      setEnvironment('external')
      setLoading(false)
    }
  }, [])

  // 飞书内免登
  const attemptFeishuAutoLogin = async (companyParam?: string) => {
    // 如果 h5sdk 存在，等待 ready 后再调用
    if (window.h5sdk?.ready) {
      window.h5sdk.ready(() => {
        console.log('h5sdk ready, 调用免登')
        performFeishuLoginWithAppId(companyParam)
      })
      return
    }

    // 如果 tt 对象已存在，直接使用
    if (window.tt) {
      performFeishuLoginWithAppId(companyParam)
      return
    }

    // 轮询等待 tt 对象（最多 5 秒）
    let attempts = 0
    const maxAttempts = 50

    const checkInterval = setInterval(() => {
      attempts++
      if (window.tt) {
        clearInterval(checkInterval)
        performFeishuLoginWithAppId(companyParam)
      } else if (attempts >= maxAttempts) {
        clearInterval(checkInterval)
        console.error('等待 tt 对象超时')
        setLoading(false)
      }
    }, 100)
  }

  // 获取 appId 并执行免登
  const performFeishuLoginWithAppId = async (companyParam?: string) => {
    let appId: string | undefined | null
    const urlParams = new URLSearchParams(window.location.search)
    appId = urlParams.get('app_id')

    if (!appId && companyParam) {
      try {
        const response = await fetch(`/api/v1/auth/feishu-config?company=${companyParam}`)
        const result = await response.json()
        if (result.code === 0 && result.data.app_id) {
          appId = result.data.app_id
        }
      } catch (e) {
        console.error('获取 appId 失败:', e)
      }
    }

    if (!appId) {
      setLoading(false)
      Toast.show('飞书应用配置错误')
      return
    }

    performFeishuLogin(companyParam, appId)
  }

  // 执行飞书免登
  const performFeishuLogin = async (companyParam?: string, appId?: string | null) => {
    if (!window.tt) {
      setLoading(false)
      Toast.show('飞书环境异常，请刷新重试')
      return
    }

    if (!appId) {
      setLoading(false)
      Toast.show('飞书应用配置错误')
      return
    }

    try {
      console.log('=== 开始免登 ===')
      console.log('appId:', appId)
      console.log('appId长度:', appId.length)
      console.log('appId前缀:', appId.substring(0, 4))
      console.log('当前URL:', window.location.href)
      console.log('调用 tt.requestAuthCode')

      // 调用飞书免登
      window.tt.requestAuthCode({
        appId: appId,
        success: (res: any) => {
          console.log('✅ 免登成功')
          console.log('code:', res.code)
          handleFeishuLogin(res.code, companyParam)
        },
        fail: (error: any) => {
          console.error('❌ 免登失败')
          console.error('完整错误对象:', JSON.stringify(error))
          console.error('errMsg:', error.errMsg)
          console.error('errorCode:', error.errorCode)
          setLoading(false)
          Toast.show('免登失败：' + (error.errMsg || JSON.stringify(error)))
        },
      })
    } catch (e) {
      console.error('❌ 免登异常:', e)
      setLoading(false)
      Toast.show('免登失败，请重试')
    }
  }

  // 处理飞书登录
  const handleFeishuLogin = async (authCode: string, companyParam?: string) => {
    try {
      const urlParams = new URLSearchParams(window.location.search)
      const urlAppId = urlParams.get('app_id')

      const response = await fetch('/api/v1/auth/feishu-login', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          auth_code: authCode,
          app_id: urlAppId || undefined,
          company: companyParam || undefined,
        }),
      })

      const result = await response.json()

      if (result.code === 0) {
        login(result.data.user, result.data.token)
        Toast.show('登录成功')

        const urlParams = new URLSearchParams(window.location.search)
        const redirect = urlParams.get('redirect')
        if (redirect) {
          window.location.href = redirect
        } else {
          navigate('/dashboard')
        }
      } else {
        Toast.show(result.message || '登录失败')
        setLoading(false)
      }
    } catch (error) {
      console.error('登录失败:', error)
      Toast.show('登录失败，请重试')
      setLoading(false)
    }
  }

  // 邮箱密码登录
  const handlePasswordLogin = () => {
    navigate('/login-simple')
  }

  // 飞书扫码登录
  const handleQRCodeLogin = () => {
    setShowQRCode(true)
  }

  if (loading) {
    return (
      <div className={styles.login}>
        <div className={styles.container}>
          <h1>企业工具台</h1>
          <p>正在登录...</p>
          <div className={styles.spinner}></div>
        </div>
      </div>
    )
  }

  return (
    <div className={styles.login}>
      <div className={styles.container}>
        <h1>企业工具台</h1>

        {environment === 'feishu' && (
          <div style={{
            background: '#fff3cd',
            border: '1px solid #ffc107',
            borderRadius: '8px',
            padding: '12px',
            marginBottom: '20px',
            fontSize: '14px',
            color: '#856404',
            textAlign: 'center'
          }}>
            <div style={{ marginBottom: '5px', fontWeight: 'bold' }}>⚠️ 飞书免登失败</div>
            <div style={{ fontSize: '12px' }}>
              请尝试其他登录方式或联系管理员
            </div>
          </div>
        )}

        <p className={styles.subtitle}>请选择登录方式</p>

        <div className={styles.loginMethods}>
          <button className={styles.methodBtn} onClick={handlePasswordLogin}>
            <div className={styles.methodIcon}>📧</div>
            <div className={styles.methodText}>
              <div className={styles.methodTitle}>邮箱密码登录</div>
              <div className={styles.methodDesc}>使用企业邮箱登录</div>
            </div>
          </button>

          {environment !== 'feishu' && (
            <button className={styles.methodBtn} onClick={handleQRCodeLogin}>
              <div className={styles.methodIcon}>📱</div>
              <div className={styles.methodText}>
                <div className={styles.methodTitle}>飞书扫码登录</div>
                <div className={styles.methodDesc}>使用飞书 APP 扫码登录</div>
              </div>
            </button>
          )}
        </div>

        {environment === 'external' && (
          <p className={styles.tip}>
            💡 提示：在飞书客户端内打开可自动登录
          </p>
        )}

        <QRCodeLogin
          visible={showQRCode}
          onClose={() => setShowQRCode(false)}
        />
      </div>
    </div>
  )
}