import { Ionicons } from '@expo/vector-icons'
import { Block, Text, Toast } from '@share/components'
import { router } from 'expo-router'
import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react'
import { TextInput } from 'react-native'
import { KeyboardAwareScrollView } from 'react-native-keyboard-controller'

import { APP_VERSION } from '@/app.config'
import BannerSection from '@/components/BannerSection'
import { phoneNumber } from '@/lib/auth'
import { isValidPhone } from '@/utils'
import { openUrl } from '@/utils/webview-helper'

const APP_NAME = '多米'

export default function Auth() {
  const [phone, setPhone] = useState('')
  const [code, setCode] = useState('')
  const [loading, setLoading] = useState(false)
  const [countdown, setCountdown] = useState(0)
  const [agreed, setAgreed] = useState(false)
  const countdownTimerRef = useRef<ReturnType<typeof setInterval> | null>(null)

  const canSendCode = useMemo(() => {
    return isValidPhone(phone) && countdown === 0
  }, [phone, countdown])

  // 清理倒计时定时器
  useEffect(() => {
    return () => {
      if (countdownTimerRef.current) {
        clearInterval(countdownTimerRef.current)
      }
    }
  }, [])

  // 获取验证码
  const handleSendCode = useCallback(async () => {
    if (!isValidPhone(phone)) {
      Toast.show({ title: '请输入有效的手机号' })
      return
    }

    if (countdown > 0) {
      return
    }

    Toast.showLoading({ title: '正在获取验证码...' })
    setLoading(true)
    try {
      const result = await phoneNumber.sendOtp({
        phoneNumber: phone,
      })

      if (result.error) {
        // 处理不同类型的错误
        const errorMessage = result.error.message || '验证码发送失败'
        
        // 如果是 403 错误，可能是请求过于频繁
        if (result.error.status === 403) {
          Toast.show({ title: '请求过于频繁，请稍后再试' })
        } else {
          Toast.show({ title: errorMessage })
        }
        return
      }

      Toast.show({ title: '验证码已发送，请查收短信' })
      setCountdown(60) // 开始倒计时

      // 倒计时逻辑
      if (countdownTimerRef.current) {
        clearInterval(countdownTimerRef.current)
      }
      countdownTimerRef.current = setInterval(() => {
        setCountdown((prev) => {
          if (prev <= 1) {
            if (countdownTimerRef.current) {
              clearInterval(countdownTimerRef.current)
              countdownTimerRef.current = null
            }
            return 0
          }
          return prev - 1
        })
      }, 1000)
    } catch (error: any) {
      console.error('获取验证码失败:', error)
      Toast.show({ title: error.message || '验证码发送失败，请稍后重试' })
    } finally {
      Toast.hideLoading()
      setLoading(false)
    }
  }, [phone, countdown])

  // 验证码登录/注册
  const handleLogin = useCallback(async () => {
    if (!phone || !code) {
      Toast.show({ title: '请填写手机号和验证码' })
      return
    }

    if (!isValidPhone(phone)) {
      Toast.show({ title: '请输入有效的手机号' })
      return
    }

    if (code.length !== 6) {
      Toast.show({ title: '请输入6位验证码' })
      return
    }

    if (!agreed) {
      Toast.show({ title: '请先阅读并同意服务条款和隐私协议' })
      return
    }

    setLoading(true)
    Toast.showLoading({ title: '正在验证...' })
    try {
      const result = await phoneNumber.verify({
        phoneNumber: phone,
        code,
        updatePhoneNumber: true, // 如果已登录，更新手机号
      })

      if (result.error) {
        const errorStatus = result.error.status
        const errorMessage = result.error.message || '验证失败'

        if (errorStatus === 403) {
          Toast.show({ title: '验证码尝试次数过多，请重新获取验证码' })
          setCode('') // 清空验证码
          setCountdown(0) // 重置倒计时，允许重新发送
          if (countdownTimerRef.current) {
            clearInterval(countdownTimerRef.current)
            countdownTimerRef.current = null
          }
        } else if (errorStatus === 401) {
          Toast.show({ title: '手机号未验证，请先验证手机号' })
        } else {
          Toast.show({ title: errorMessage })
        }
        return
      }
      Toast.show({ title: '登录成功！' })
      
      // 延迟跳转，确保 toast 显示
      setTimeout(() => {
        router.replace('/(tabs)')
      }, 500)
    } catch (error: any) {
      console.error('登录失败:', error)
      Toast.show({ title: error.message || '登录失败，请稍后重试' })
    } finally {
      Toast.hideLoading()
      setLoading(false)
    }
  }, [phone, code, agreed])

  return (
    <Block className="relative flex-1 bg-black">
      <BannerSection />
      <KeyboardAwareScrollView bottomOffset={100}>
        <Block className="flex-1 items-center justify-center px-[24px] py-[40px]">
          <Block className="relative w-full max-w-screen-xs">
            <Block className="relative mb-[32px] items-center">
              <Block className="size-[80px] items-center justify-center rounded-full border-4 border-black bg-accent shadow-deep-black">
                <Ionicons color="black" name="flash" size={40} />
              </Block>
              <Text className="font-900 mt-[16px] text-[32px] text-white">{APP_NAME}</Text>
              <Block className="mt-[8px] h-[4px] w-[120px] bg-accent" />
            </Block>

            <Block
              className="relative border-4 border-black bg-white p-[24px] shadow-deep-black"
              style={{ transform: [{ skewX: '-3deg' }] }}
            >
              <Block style={{ transform: [{ skewX: '3deg' }] }}>
                <Block className="mt-[4px] gap-[16px]">
                  <Block>
                    <Text className="font-900 mb-[8px] text-[12px] text-black">手机号</Text>
                    <Block
                      className="flex-row items-center border-[3px] border-black bg-white px-[12px] shadow-medium-black"
                      style={{ height: 48 }}
                    >
                      <Ionicons color="black" name="phone-portrait-outline" size={20} style={{ marginRight: 8 }} />
                      <TextInput
                        autoCapitalize="none"
                        keyboardType="phone-pad"
                        placeholder="请输入手机号"
                        placeholderTextColor="#9CA3AF"
                        value={phone}
                        maxLength={11}
                        style={{
                          flex: 1,
                          fontSize: 14,
                          fontWeight: 'bold',
                          color: 'black',
                        }}
                        onChangeText={setPhone}
                      />
                      <Block
                        onClick={countdown > 0 ? undefined : handleSendCode}
                        className={`border-2 border-black px-[6px] py-[4px] ${canSendCode && countdown === 0 ? 'bg-black' : 'bg-gray-200'}`}
                      >
                        <Text className={`text-[10px] font-[900] ${canSendCode && countdown === 0 ? 'text-accent' : 'text-gray-500'}`}>
                          {countdown > 0 ? `${countdown}秒` : '获取验证码'}
                        </Text>
                      </Block>
                    </Block>
                  </Block>

                  <Block>
                    <Text className="font-900 mb-[8px] text-[12px] text-black">验证码</Text>
                    <Block
                      className="flex-row items-center border-[3px] border-black bg-white px-[12px] shadow-medium-black"
                      style={{ height: 48 }}
                    >
                      <Ionicons color="black" name="key-outline" size={20} style={{ marginRight: 8 }} />
                      <TextInput
                        autoCapitalize="none"
                        keyboardType="number-pad"
                        placeholder="请输入验证码"
                        placeholderTextColor="#9CA3AF"
                        value={code}
                        maxLength={6}
                        style={{
                          flex: 1,
                          fontSize: 14,
                          fontWeight: 'bold',
                          color: 'black',
                        }}
                        onChangeText={setCode}
                      />
                    </Block>
                  </Block>

                  <Block className="mt-[8px] flex-row items-center gap-[8px]">
                    <Block
                      onClick={() => setAgreed(!agreed)}
                      className={`size-[20px] items-center justify-center border-[2px] border-black ${agreed ? 'bg-black' : 'bg-white'}`}
                    >
                      {agreed && <Ionicons color="#FFE500" name="checkmark" size={14} />}
                    </Block>
                    <Block className="flex-row flex-wrap items-center">
                      <Text className="font-700 text-[12px] text-black">已阅读并同意</Text>
                      <Text
                        className="font-700 text-[12px] text-black underline"
                        onClick={() => openUrl('https://mixvideo.bowong.cc/terms', '服务条款')}
                      >
                        服务条款
                      </Text>
                      <Text className="font-700 text-[12px] text-black">和</Text>
                      <Text
                        className="font-700 text-[12px] text-black underline"
                        onClick={() => openUrl('https://mixvideo.bowong.cc/privacy', '隐私协议')}
                      >
                        隐私协议
                      </Text>
                    </Block>
                  </Block>

                  <Block
                    className={`font-900 mt-[8px] flex-row items-center justify-center gap-[8px] border-[3px] border-black py-[14px] shadow-hard-black ${loading ? 'bg-gray-300' : 'bg-accent'}`}
                    onClick={handleLogin}
                  >
                    {loading ? (
                      <Ionicons color="black" name="hourglass-outline" size={20} />
                    ) : (
                      <Ionicons color="black" name="flash" size={20} />
                    )}
                    <Text className="font-900 text-[16px] text-black">{loading ? '验证中...' : '登录/注册'}</Text>
                  </Block>
                </Block>
              </Block>
            </Block>

            <Block className="mt-[24px] items-center">
              <Text className="font-700 text-[12px] text-gray-400">© 2025 LOOMART. All rights reserved.</Text>
              <Text className="font-700 text-[12px] text-gray-400">插件当前版本号: {APP_VERSION}</Text>
            </Block>
          </Block>
        </Block>
        <Block className="h-[200px]" />
      </KeyboardAwareScrollView>
    </Block>
  )
}