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

import { APP_VERSION } from '@/app.constants'
import BannerSection from '@/components/BannerSection'
import { setAuthToken, signIn, signUp } from '@/lib/auth'
type AuthMode = 'login' | 'register'

const APP_NAME = '多米'

// 判断是否为邮箱格式的辅助函数
const isEmail = (input: string) => {
  return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(input)
}

export default function Auth() {
  const [mode, setMode] = useState<AuthMode>('login')

  const [username, setUsername] = useState('')
  const [email, setEmail] = useState('')
  const [password, setPassword] = useState('')
  const [confirmPassword, setConfirmPassword] = useState('')
  const [showPassword, setShowPassword] = useState(false)
  const [showConfirmPassword, setShowConfirmPassword] = useState(false)
  const [loading, setLoading] = useState(false)

  const handleLogin = useCallback(async () => {
    if (!username || !password) {
      Toast.show({ title: '请填写账号和密码' })
      return
    }

    setLoading(true)
    try {
      let result

      if (isEmail(username)) {
        // 如果用户名是邮箱格式，使用邮箱登录
        result = await signIn.email(
          {
            email: username,
            password,
          },
          {
            onSuccess: async (ctx) => {
              const authToken = ctx.response.headers.get('set-auth-token')
              if (authToken) {
                setAuthToken(authToken)
              }
            },
            onError: (ctx) => {
              console.error(`[LOGIN] email login error`, ctx)
            },
          },
        )
      } else {
        // 如果用户名不是邮箱格式，使用用户名登录
        result = await signIn.username(
          {
            username,
            password,
          },
          {
            onSuccess: async (ctx) => {
              const authToken = ctx.response.headers.get('set-auth-token')
              if (authToken) {
                setAuthToken(authToken)
              }
            },
            onError: (ctx) => {
              console.error(`[LOGIN] username login error`, ctx)
            },
          },
        )
      }

      if (result.error) {
        Toast.show({ title: '请输入正确的账号或密码' })
      } else {
        Toast.show({ title: '登录成功！' })
        router.replace('/(tabs)')
      }
    } catch (error: any) {
      Toast.show({ title: error.message || '登录失败' })
    } finally {
      setLoading(false)
    }
  }, [username, password, signIn])

  const handleRegister = useCallback(async () => {
    if (!email || !username || !password) {
      Toast.show({ title: '请填写所有必填项' })
      return
    }

    if (password !== confirmPassword) {
      Toast.show({ title: '两次密码输入不一致' })
      return
    }

    if (password.length < 6) {
      Toast.show({ title: '密码长度至少6位' })
      return
    }

    setLoading(true)
    try {
      const result = await signUp.email({
        email,
        username,
        password,
        name: username,
      })

      // console.log('result------------', result)

      if (result.error) {
        Toast.show({ title: result.error.message || '注册失败' })
      } else {
        Toast.show({ title: '注册成功！' })
      }
    } catch (error: any) {
      Toast.show({ title: error.message || '注册失败' })
    } finally {
      setLoading(false)
    }
  }, [email, username, password, confirmPassword, signUp])

  const handleSubmit = useCallback(() => {
    if (mode === 'login') {
      handleLogin()
    } else {
      handleRegister()
    }
  }, [mode, handleLogin, handleRegister])

  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="mb-[24px] flex-row gap-[12px]">
              {(['login', 'register'] as const).map((tabMode) => {
                const isActive = mode === tabMode
                return (
                  <Block
                    key={tabMode}
                    className={`flex-1 items-center justify-center border-[3px] border-black py-[12px] shadow-hard-black ${isActive ? 'bg-accent' : 'bg-white'}`}
                    style={{ transform: [{ skewX: '-6deg' }] }}
                    onClick={() => setMode(tabMode)}
                  >
                    <Text
                      className={`font-900 text-[14px] ${isActive ? 'text-black' : 'text-gray-500'}`}
                      style={{ transform: [{ skewX: '6deg' }] }}
                    >
                      {tabMode === 'login' ? '登录' : '注册'}
                    </Text>
                  </Block>
                )
              })}
            </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]">
                  {mode === 'login' ? (
                    <Block>
                      <Text className="font-900 mb-[8px] text-[12px] text-black">账号</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="person-outline" size={20} style={{ marginRight: 8 }} />
                        <TextInput
                          autoCapitalize="none"
                          placeholder="用户名或邮箱"
                          placeholderTextColor="#9CA3AF"
                          value={username}
                          style={{
                            flex: 1,
                            fontSize: 14,
                            fontWeight: 'bold',
                            color: 'black',
                          }}
                          onChangeText={setUsername}
                        />
                      </Block>
                    </Block>
                  ) : (
                    <>
                      <Block>
                        <Text className="font-900 mb-[8px] text-[12px] text-black">邮箱</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="mail-outline" size={20} style={{ marginRight: 8 }} />
                          <TextInput
                            autoCapitalize="none"
                            keyboardType="email-address"
                            placeholder=""
                            placeholderTextColor="#9CA3AF"
                            value={email}
                            style={{
                              flex: 1,
                              fontSize: 14,
                              fontWeight: 'bold',
                              color: 'black',
                            }}
                            onChangeText={setEmail}
                          />
                        </Block>
                      </Block>

                      <Block>
                        <Text className="font-900 mb-[8px] text-[12px] text-black">用户名</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="person-outline" size={20} style={{ marginRight: 8 }} />
                          <TextInput
                            autoCapitalize="none"
                            placeholder=""
                            placeholderTextColor="#9CA3AF"
                            value={username}
                            style={{
                              flex: 1,
                              fontSize: 14,
                              fontWeight: 'bold',
                              color: 'black',
                            }}
                            onChangeText={setUsername}
                          />
                        </Block>
                      </Block>
                    </>
                  )}

                  <Block>
                    <Text className="font-900 mb-[8px] text-[12px] text-black">密码</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="lock-closed-outline" size={20} style={{ marginRight: 8 }} />
                      <TextInput
                        secureTextEntry={!showPassword}
                        placeholder="请输入六位密码"
                        placeholderTextColor="#9CA3AF"
                        value={password}
                        style={{
                          flex: 1,
                          fontSize: 14,
                          fontWeight: 'bold',
                          color: 'black',
                        }}
                        onChangeText={setPassword}
                      />
                      <Block onClick={() => setShowPassword(!showPassword)} className="p-1">
                        <Ionicons color="black" name={showPassword ? 'eye-off-outline' : 'eye-outline'} size={20} />
                      </Block>
                    </Block>
                  </Block>

                  {mode === 'login' && (
                    <Block className="items-end">
                      <Text
                        className="font-700 text-[12px] text-gray-500"
                        onClick={() => router.push('/forgot-password')}
                      >
                        忘记密码
                      </Text>
                    </Block>
                  )}

                  {mode === 'register' && (
                    <Block>
                      <Text className="font-900 mb-[8px] text-[12px] text-black">确认密码</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="lock-closed-outline" size={20} style={{ marginRight: 8 }} />
                        <TextInput
                          secureTextEntry={!showConfirmPassword}
                          placeholder="请输入密码"
                          placeholderTextColor="#9CA3AF"
                          value={confirmPassword}
                          style={{
                            flex: 1,
                            fontSize: 14,
                            fontWeight: 'bold',
                            color: 'black',
                          }}
                          onChangeText={setConfirmPassword}
                        />
                        <Block onClick={() => setShowConfirmPassword(!showConfirmPassword)} className="p-1">
                          <Ionicons
                            color="black"
                            name={showConfirmPassword ? 'eye-off-outline' : 'eye-outline'}
                            size={20}
                          />
                        </Block>
                      </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={handleSubmit}
                  >
                    {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 ? '处理中...' : mode === 'login' ? '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>
  )
}