import { NextResponse } from 'next/server'
import { db } from '@/lib/db'

export const dynamic = 'force-dynamic'

// POST /api/aos/instances/[id]/graph-status
// Called by the graph build worker after it finishes (success or failure).
// Body: { status: 'ok' | 'error', stats?: {...}, error?: '...' }
//
// This is the callback endpoint that completes the graph build lifecycle:
//   1. AOS queues build (graphify.build.queued)
//   2. Worker picks up, calls POST /graph-build, gets the command
//   3. Worker executes graphify CLI
//   4. Worker calls this endpoint to report success/failure
//   5. AOS records graphify.build.ok / graphify.build.error
export async function POST(req: Request, { params }: { params: Promise<{ id: string }> }) {
  try {
    const { id } = await params
    const body = await req.json().catch(() => ({}))
    const status = body.status === 'ok' ? 'ok' : 'error'

    const instance = await db.instance.findUnique({ where: { id } })
    if (!instance) {
      return NextResponse.json({ error: 'instance not found' }, { status: 404 })
    }

    if (status === 'ok') {
      await db.instanceEvent.create({
        data: {
          instanceId: id,
          type: 'graphify.build.ok',
          step: 'graphify',
          result: 'ok',
          details: JSON.stringify({
            stats: body.stats ?? null,
            graphPath: body.graphPath ?? null,
            builtAt: new Date().toISOString(),
          }),
        },
      })
      await db.auditLog.create({
        data: {
          actor: 'graphify-worker',
          action: 'graphify.build.ok',
          entity: 'Instance',
          entityId: id,
          after: JSON.stringify({ stats: body.stats }),
          hash: 'sha256:' + Math.random().toString(36).slice(2),
        },
      })
      return NextResponse.json({ ok: true, status: 'ok' })
    } else {
      await db.instanceEvent.create({
        data: {
          instanceId: id,
          type: 'graphify.build.error',
          step: 'graphify',
          result: 'error',
          details: JSON.stringify({ error: body.error ?? 'unknown build error' }),
        },
      })
      await db.instance.update({
        where: { id },
        data: {
          lastError: `graphify build failed: ${body.error ?? 'unknown'}`,
          lastErrorAt: new Date(),
        },
      })
      return NextResponse.json({ ok: false, status: 'error', error: body.error })
    }
  } catch (err) {
    const msg = err instanceof Error ? err.message : 'internal server error'
    return NextResponse.json({ error: msg }, { status: 500 })
  }
}