/**
 * GET  /api/zabbix/hosts  — list all hosts with full detail + RMM match status
 * DELETE /api/zabbix/hosts — bulk delete by hostid array
 */

import { NextRequest, NextResponse } from 'next/server';
import { ZabbixClient } from '@/lib/services/zabbix-client';
import { postgresClient } from '@/lib/services/postgres-client';

function makeZabbix() {
  if (!process.env.ZABBIX_API_URL || !process.env.ZABBIX_API_TOKEN) {
    throw new Error('Zabbix is not configured. Set ZABBIX_API_URL and ZABBIX_API_TOKEN.');
  }
  return new ZabbixClient({
    apiUrl: process.env.ZABBIX_API_URL!,
    apiToken: process.env.ZABBIX_API_TOKEN!,
  });
}

export async function GET() {
  try {
    const zabbix = makeZabbix();
    const hosts = await zabbix.getHosts();

    // Load all known RMM site UIDs from Postgres for mismatch detection
    const res = await postgresClient.query<{ rmm_site_uid: string }>(
      'SELECT rmm_site_uid FROM rmm_site_mappings'
    );
    const knownSiteUids = new Set(res.rows.map((r) => r.rmm_site_uid));

    // Annotate each host with rmmMatched flag
    const annotated = hosts.map((h) => {
      const rmmUidMacro = h.macros?.find((m) => m.macro === '{$RMM_SITE_UID}');
      const sourceTag = h.tags?.find((t) => t.tag === 'source')?.value ?? null;

      let rmmMatched: boolean | null = null;
      if (sourceTag === 'datto-rmm') {
        rmmMatched = rmmUidMacro ? knownSiteUids.has(rmmUidMacro.value) : false;
      }

      return { ...h, rmmMatched, sourceTag };
    });

    return NextResponse.json({ hosts: annotated });
  } catch (error) {
    console.error('[GET /api/zabbix/hosts]', error);
    return NextResponse.json({ error: String(error) }, { status: 500 });
  }
}

export async function DELETE(request: NextRequest) {
  try {
    const body = await request.json();
    const { hostids } = body as { hostids: string[] };

    if (!Array.isArray(hostids) || hostids.length === 0) {
      return NextResponse.json({ error: 'hostids array is required' }, { status: 400 });
    }

    const zabbix = makeZabbix();
    await zabbix.deleteHosts(hostids);

    return NextResponse.json({ deleted: hostids.length });
  } catch (error) {
    console.error('[DELETE /api/zabbix/hosts]', error);
    return NextResponse.json({ error: String(error) }, { status: 500 });
  }
}