import { NextResponse } from 'next/server';

export async function GET() {
  try {
    // Oracle DB 연결 테스트
    let oracleStatus = 'unknown';
    let oracleError = null;
    
    try {
      const { oracleKnex } = await import('@/lib/oracle-db/db');
      const result = await oracleKnex.raw('SELECT 1 FROM DUAL');
      oracleStatus = result ? 'connected' : 'disconnected';
    } catch (error) {
      oracleStatus = 'disconnected';
      oracleError = error instanceof Error ? error.message : String(error);
    }

    // PostgreSQL 연결 테스트
    let postgresStatus = 'unknown';
    let postgresError = null;
    
    try {
      const db = await import('@/db/db');
      await db.default.execute('SELECT 1');
      postgresStatus = 'connected';
    } catch (error) {
      postgresStatus = 'disconnected';
      postgresError = error instanceof Error ? error.message : String(error);
    }

    // 전체 상태 판단
    const overallStatus = oracleStatus === 'connected' && postgresStatus === 'connected' 
      ? 'healthy' 
      : 'unhealthy';

    return NextResponse.json({
      status: overallStatus,
      timestamp: new Date().toISOString(),
      databases: {
        oracle: {
          status: oracleStatus,
          error: oracleError
        },
        postgres: {
          status: postgresStatus,
          error: postgresError
        }
      },
      environment: {
        nodeEnv: process.env.NODE_ENV,
        runtime: process.env.NEXT_RUNTIME || 'nodejs'
      }
    });
  } catch (error) {
    console.error('Health check error:', error);
    
    return NextResponse.json({
      status: 'error',
      timestamp: new Date().toISOString(),
      error: error instanceof Error ? error.message : String(error)
    }, { status: 500 });
  }
}