route.ts

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import { NextRequest, NextResponse } from 'next/server';
import { fieldpineServerApi } from '@/lib/server/fieldpineApi';
import { getRequestContext } from '@/lib/server/sessionUtils';
 
/**
 * eLink/BUCK Products Endpoint
 * Uses Fieldpine's BUCK API via eLink protocol
 * Documentation: https://docs.fieldpine.com/pos/elink.htm
 */
export async function GET(request: NextRequest) {
  try {
    // Get request context with authentication
    const context = await getRequestContext(request);
    if (!context?.session) {
      return NextResponse.json(
        { error: 'Authentication required' },
        { status: 401 }
      );
    }
 
    // Rate limiting
    const clientId = request.headers.get('x-forwarded-for') || 
                    request.headers.get('x-real-ip') || 
                    context.session.userId || 
                    'unknown';
    if (!fieldpineServerApi.checkClientRateLimit(clientId)) {
      return NextResponse.json(
        { error: 'Rate limit exceeded' },
        { status: 429 }
      );
    }
 
    // Parse query parameters
    const { searchParams } = new URL(request.url);
    const params: Record<string, string | number> = {};
    
    const search = searchParams.get('search');
    if (search) params.search = search;
    
    const plu = searchParams.get('plu');
    if (plu) params.plu = plu;
    
    const barcode = searchParams.get('barcode');
    if (barcode) params.barcode = barcode;
    
    const limit = searchParams.get('limit');
    if (limit) params.limit = parseInt(limit);
 
    // Call Fieldpine BUCK API via eLink protocol
    try {
      const products = await fieldpineServerApi.getProducts(params, context.session.apiKey);
      
      return NextResponse.json({ 
        success: true, 
        data: products,
        source: 'elink'
      });
      
    } catch (error) {
      console.error('eLink products error:', error);
      return NextResponse.json(
        { error: 'eLink endpoint unavailable', source: 'elink' },
        { status: 503 }
      );
    }
 
  } catch (error) {
    console.error('eLink products error:', error);
    return NextResponse.json(
      { error: 'Failed to fetch products' },
      { status: 500 }
    );
  }
}