'use client'
import { RiArrowLeftLine, RiMailSendFill } from '@remixicon/react'
import { useTranslation } from 'react-i18next'
import { type FormEvent, useEffect, useRef, useState } from 'react'
import { useRouter, useSearchParams } from 'next/navigation'
import { useContext } from 'use-context-selector'
import Countdown from '@/app/components/signin/countdown'
import Button from '@/app/components/base/button'
import Input from '@/app/components/base/input'
import Toast from '@/app/components/base/toast'
import { emailLoginWithCode, sendEMailLoginCode } from '@/service/common'
import I18NContext from '@/context/i18n'
import { resolvePostLoginRedirect } from '../utils/post-login-redirect'
import { trackEvent } from '@/app/components/base/amplitude'
import { encryptVerificationCode } from '@/utils/encryption'

export default function CheckCode() {
  const { t, i18n } = useTranslation()
  const router = useRouter()
  const searchParams = useSearchParams()
  const email = decodeURIComponent(searchParams.get('email') as string)
  const token = decodeURIComponent(searchParams.get('token') as string)
  const invite_token = decodeURIComponent(searchParams.get('invite_token') || '')
  const language = i18n.language
  const [code, setVerifyCode] = useState('')
  const [loading, setIsLoading] = useState(false)
  const { locale } = useContext(I18NContext)
  const codeInputRef = useRef<HTMLInputElement>(null)

  const verify = async () => {
    try {
      if (!code.trim()) {
        Toast.notify({
          type: 'error',
          message: t('login.checkCode.emptyCode'),
        })
        return
      }
      if (!/\d{6}/.test(code)) {
        Toast.notify({
          type: 'error',
          message: t('login.checkCode.invalidCode'),
        })
        return
      }
      setIsLoading(true)
      const ret = await emailLoginWithCode({ email, code: encryptVerificationCode(code), token, language })
      if (ret.result === 'success') {
        // Track login success event
        trackEvent('user_login_success', {
          method: 'email_code',
          is_invite: !!invite_token,
        })

        if (invite_token) {
          router.replace(`/signin/invite-settings?${searchParams.toString()}`)
        }
        else {
          const redirectUrl = resolvePostLoginRedirect(searchParams)
          router.replace(redirectUrl || '/apps')
        }
      }
    }
    catch (error) { console.error(error) }
    finally {
      setIsLoading(false)
    }
  }

  const handleSubmit = (event: FormEvent<HTMLFormElement>) => {
    event.preventDefault()
    verify()
  }

  useEffect(() => {
    codeInputRef.current?.focus()
  }, [])

  const resendCode = async () => {
    try {
      const ret = await sendEMailLoginCode(email, locale)
      if (ret.result === 'success') {
        const params = new URLSearchParams(searchParams)
        params.set('token', encodeURIComponent(ret.data))
        router.replace(`/signin/check-code?${params.toString()}`)
      }
    }
    catch (error) { console.error(error) }
  }

  return <div className='flex flex-col gap-3'>
    <div className='inline-flex h-14 w-14 items-center justify-center rounded-2xl border border-components-panel-border-subtle bg-background-default-dodge shadow-lg'>
      <RiMailSendFill className='h-6 w-6 text-2xl text-text-accent-light-mode-only' />
    </div>
    <div className='pb-4 pt-2'>
      <h2 className='title-4xl-semi-bold text-text-primary'>{t('login.checkCode.checkYourEmail')}</h2>
      <p className='body-md-regular mt-2 text-text-secondary'>
        <span>
          {t('login.checkCode.tipsPrefix')}
          <strong>{email}</strong>
        </span>
        <br />
        {t('login.checkCode.validTime')}
      </p>
    </div>

    <form onSubmit={handleSubmit}>
      <label htmlFor="code" className='system-md-semibold mb-1 text-text-secondary'>{t('login.checkCode.verificationCode')}</label>
      <Input
        ref={codeInputRef}
        id='code'
        value={code}
        onChange={e => setVerifyCode(e.target.value)}
        maxLength={6}
        className='mt-1'
        placeholder={t('login.checkCode.verificationCodePlaceholder') as string}
      />
      <Button type='submit' loading={loading} disabled={loading} className='my-3 w-full' variant='primary'>{t('login.checkCode.verify')}</Button>
      <Countdown onResend={resendCode} />
    </form>
    <div className='py-2'>
      <div className='h-px bg-gradient-to-r from-background-gradient-mask-transparent via-divider-regular to-background-gradient-mask-transparent'></div>
    </div>
    <div onClick={() => router.back()} className='flex h-9 cursor-pointer items-center justify-center text-text-tertiary'>
      <div className='inline-block rounded-full bg-background-default-dimmed p-1'>
        <RiArrowLeftLine size={12} />
      </div>
      <span className='system-xs-regular ml-2'>{t('login.back')}</span>
    </div>
  </div>
}
