import { NextRequest, NextResponse } from 'next/server'
import prisma from '@/lib/prisma'
import { agentSuggestionService } from '@/lib/ai/services/agent-suggestion.service'

export const dynamic = 'force-dynamic'

function authorizeCron(request: NextRequest): boolean {
  const cronSecret = process.env.CRON_SECRET
  if (!cronSecret) return false
  const authHeader = request.headers.get('authorization')
  const bearer = authHeader?.startsWith('Bearer ') ? authHeader.slice(7) : null
  const querySecret = new URL(request.url).searchParams.get('secret')
  return bearer === cronSecret || querySecret === cronSecret
}

/**
 * POST /api/cron/agent-suggestions
 * Génère des suggestions d'agents à partir des clusters sémantiques existants.
 */
export async function POST(request: NextRequest) {
  if (!authorizeCron(request)) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
  }

  const users = await prisma.user.findMany({
    where: { noteClusters: { some: {} } },
    select: { id: true },
    take: 30,
  })

  let total = 0
  for (const user of users) {
    try {
      total += await agentSuggestionService.generateForUser(user.id)
    } catch (err) {
      console.error('[CronAgentSuggestions] user', user.id, err)
    }
  }

  return NextResponse.json({ success: true, users: users.length, suggestionsUpserted: total })
}