route.ts

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import { NextRequest, NextResponse } from 'next/server';
import { fieldpineServerApi } from '@/lib/server/fieldpineApi';
import { getStoredAuth } from '@/lib/server/auth';
 
/**
 * Grouped Sales Report
 * BUCK: retailmax.elink.sale.totals.group
 * Returns sales aggregated by product, supplier, or department
 */
export async function GET(request: NextRequest) {
  try {
    const authData = await getStoredAuth();
    if (!authData || !authData.authenticated) {
      return NextResponse.json(
        { error: 'Authentication required' },
        { status: 401 }
      );
    }
 
    const { searchParams } = new URL(request.url);
    
    // Date filters
    const startDate = searchParams.get('startDate');
    const endDate = searchParams.get('endDate');
    const limit = searchParams.get('limit') || '100';
    
    // Grouping: product, supplier, department, location, teller
    const groupBy = searchParams.get('groupBy') || 'product';
 
    // Build BUCK parameters
    const params: string[] = [
      '3=retailmax.elink.sale.totals.group',
      `8=${limit}`
    ];
 
    // Add date filters
    if (startDate) {
      params.push(`9=f102,4,${startDate}`);
    }
    if (endDate) {
      params.push(`9=f102,1,${endDate}`);
    }
 
    // Set grouping field
    switch (groupBy) {
      case 'product':
        params.push('15=200'); // Group by product (f200)
        break;
      case 'supplier':
        params.push('15=220'); // Group by supplier (f220)
        break;
      case 'department':
        params.push('15=133'); // Group by department (f133)
        break;
      case 'location':
        params.push('15=131'); // Group by location (f131)
        break;
      case 'teller':
        params.push('15=140'); // Group by teller (f140)
        break;
    }
 
    const query = params.join('&');
    const url = `/GNAP/j/buck?${query}`;
 
    console.log('[Sales Grouped] BUCK query:', url);
 
    const result = await fieldpineServerApi.apiCall(url, {
      cookie: authData.apiKey,
      useOpenApi: false
    });
 
    // Process BUCK response
    if (result && result.DATS && Array.isArray(result.DATS)) {
      const grouped = result.DATS.map((item: any) => ({
        groupId: item.f100,
        groupName: item.f101,
        totalSales: item.f210,
        totalUnits: item.f211,
        totalRevenue: item.f212,
        totalCost: item.f213,
        grossProfit: item.f214,
        grossMargin: item.f215,
        transactionCount: item.f220
      }));
 
      return NextResponse.json({
        success: true,
        data: grouped,
        count: grouped.length,
        groupBy,
        source: 'buck'
      });
    }
 
    return NextResponse.json({
      success: true,
      data: [],
      count: 0,
      groupBy,
      source: 'buck'
    });
 
  } catch (error) {
    console.error('[Sales Grouped] Error:', error);
    return NextResponse.json(
      { error: 'Failed to fetch grouped sales' },
      { status: 500 }
    );
  }
}