import { NextRequest, NextResponse } from 'next/server'
import { requireAdmin } from '@/lib/auth'
import { getAiConfig } from '@/lib/app-settings'

export async function POST(request: NextRequest) {
  const auth = await requireAdmin(request)
  if (auth instanceof NextResponse) return auth

  const { endpoint, model } = getAiConfig()

  if (!endpoint) {
    return NextResponse.json({ error: 'No endpoint configured' }, { status: 400 })
  }

  const url = endpoint.replace(/\/+$/, '') + '/chat/completions'

  try {
    const controller = new AbortController()
    const timeout = setTimeout(() => controller.abort(), 10_000)

    const res = await fetch(url, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      signal: controller.signal,
      body: JSON.stringify({
        model: model || 'test',
        messages: [{ role: 'user', content: 'Hi' }],
        max_tokens: 1,
      }),
    })

    clearTimeout(timeout)

    if (!res.ok) {
      const text = await res.text().catch(() => '')
      return NextResponse.json(
        { error: `LLM returned ${res.status}: ${text.slice(0, 200)}` },
        { status: 502 }
      )
    }

    return NextResponse.json({ ok: true })
  } catch (err) {
    const message = err instanceof Error ? err.message : 'Unknown error'
    return NextResponse.json({ error: `Connection failed: ${message}` }, { status: 502 })
  }
}