'use client'

import { useState } from 'react'
import { useTranslations } from 'next-intl'
import { useRouter, Link } from '@/i18n/navigation'

const ERROR_KEYS = ['invalidLink', 'expiredLink', 'passwordMismatch', 'passwordTooLong', 'accountNotFound'] as const

export function ResetForm({ token }: { token: string }) {
  const t = useTranslations('Reset')
  const router = useRouter()
  const [password, setPassword] = useState('')
  const [confPassword, setConfPassword] = useState('')
  const [busy, setBusy] = useState(false)
  const [done, setDone] = useState(false)
  const [message, setMessage] = useState<{ ok: boolean; text: string } | null>(null)

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault()
    if (busy || done) return
    setBusy(true)
    setMessage(null)
    try {
      const res = await fetch('/api/auth/reset-password', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ token, password, confPassword }),
      })
      const data: { success?: boolean; error?: string } = await res.json()
      if (data.success) {
        setDone(true)
        setMessage({ ok: true, text: t('success') })
        setTimeout(() => router.push('/log-in'), 2500)
      } else {
        const key = (ERROR_KEYS as readonly string[]).includes(data.error ?? '') ? data.error! : 'genericError'
        setMessage({ ok: false, text: t(key) })
      }
    } catch {
      setMessage({ ok: false, text: t('genericError') })
    } finally {
      setBusy(false)
    }
  }

  return (
    <>
      <form noValidate onSubmit={handleSubmit} acceptCharset="utf-8">
        <table className="middle-center-table">
          <tbody>
            <tr>
              <td>
                <input type="password" maxLength={16} placeholder={t('password')} value={password} onChange={(e) => setPassword(e.target.value)} required />
              </td>
            </tr>
            <tr>
              <td>
                <input type="password" maxLength={16} placeholder={t('confPassword')} value={confPassword} onChange={(e) => setConfPassword(e.target.value)} required />
              </td>
            </tr>
            <tr>
              <td>
                <button type="submit" className="recover-button" disabled={busy || done}>
                  {busy ? t('saving') : t('submit')}
                </button>
              </td>
            </tr>
          </tbody>
        </table>
      </form>
      <hr />
      <div className="alert-message" style={{ display: message ? 'block' : 'none' }}>
        {message && (
          <span className={message.ok ? 'ok-form-response' : 'red-form-response'}>{message.text}</span>
        )}
      </div>
      {done && (
        <p>
          <Link href="/log-in">{t('goLogin')}</Link>
        </p>
      )}
    </>
  )
}