import { NextResponse } from 'next/server';
import { esClient, INDEX_NAME } from '@/lib/elasticsearch';

export async function GET() {
  try {
    // Check Elasticsearch connection
    const health = await esClient.cluster.health({});
    
    // Check if index exists
    const indexExists = await esClient.indices.exists({ index: INDEX_NAME });
    
    // Get index stats if exists
    let stats = null;
    if (indexExists) {
      const statsResponse = await esClient.indices.stats({ index: INDEX_NAME });
      stats = {
        documentCount: statsResponse._all?.primaries?.docs?.count || 0,
        indexSize: statsResponse._all?.primaries?.store?.size_in_bytes || 0
      };
    }

    return NextResponse.json({
      status: 'ok',
      elasticsearch: {
        cluster: health.cluster_name,
        status: health.status,
      },
      index: {
        exists: indexExists,
        name: INDEX_NAME,
        stats
      }
    });
  } catch (error) {
    console.error('Health check error:', error);
    return NextResponse.json(
      { 
        status: 'error', 
        error: error instanceof Error ? error.message : 'Unknown error' 
      },
      { status: 503 }
    );
  }
}