'use client'

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

export function NewTopicForm({ forumId }: { forumId: number }) {
  const t = useTranslations('Forum')
  const router = useRouter()
  const [name, setName] = useState('')
  const [text, setText] = useState('')
  const [busy, setBusy] = useState(false)
  const [error, setError] = useState<string | null>(null)

  async function handleSubmit(e: React.FormEvent) {
    e.preventDefault()
    if (busy || !name.trim() || !text.trim()) return
    setBusy(true)
    setError(null)
    try {
      const res = await fetch('/api/forum/topic', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        credentials: 'same-origin',
        body: JSON.stringify({ forumId, name, text }),
      })
      const data: { success?: boolean; topicId?: number } = await res.json()
      if (data.success && data.topicId) router.push(`/forum/topic/${data.topicId}`)
      else {
        setError(t('genericError'))
        setBusy(false)
      }
    } catch {
      setError(t('genericError'))
      setBusy(false)
    }
  }

  const field = 'w-full rounded border border-amber-900/60 bg-[#2c1e14] px-3 py-2'
  return (
    <form onSubmit={handleSubmit} className="mt-8 space-y-3 rounded-lg border border-amber-900/60 bg-[#241812] p-4">
      <h3 className="font-semibold text-amber-400">{t('newTopic')}</h3>
      <input value={name} onChange={(e) => setName(e.target.value)} placeholder={t('newTopicName')} maxLength={200} className={field} />
      <textarea value={text} onChange={(e) => setText(e.target.value)} placeholder={t('newTopicText')} rows={4} className={field} />
      <button type="submit" disabled={busy} className="rounded bg-amber-600 px-4 py-2 font-semibold text-[#1b120b] disabled:opacity-60">
        {busy ? t('publishing') : t('publish')}
      </button>
      {error && <p className="text-red-400">{error}</p>}
    </form>
  )
}
