import { NextRequest, NextResponse } from 'next/server'
import { auth } from '@/auth'
import { searchOverviewService } from '@/lib/ai/services/search-overview.service'
import { withAiQuota, handleQuotaHttpError } from '@/lib/ai-quota'

export async function POST(request: NextRequest) {
  try {
    const session = await auth()
    if (!session?.user?.id) {
      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
    }

    const { query, results, language } = await request.json()
    if (!query?.trim() || !Array.isArray(results)) {
      return NextResponse.json({ error: 'query and results required' }, { status: 400 })
    }

    const overview = await withAiQuota(
      session.user.id,
      'semantic_search',
      () => searchOverviewService.generate(query, results, language),
      { lane: 'chat' },
    )

    return NextResponse.json(overview)
  } catch (error: unknown) {
    const quotaResp = handleQuotaHttpError(error)
    if (quotaResp) return quotaResp
    console.error('[Search Overview] Error:', error)
    const message = error instanceof Error ? error.message : 'Search overview failed'
    return NextResponse.json({ error: message, hasRelevantInfo: false, answer: '' }, { status: 500 })
  }
}