import { NextResponse } from 'next/server';
import { env } from '@/lib/env';

// Test endpoint to check backend behavior with limits
export async function GET(request: Request) {
  try {
    const url = new URL(request.url);
    
    // Get limit parameter or use default limits for testing
    const requestedLimit = url.searchParams.get('limit');
    const limits = requestedLimit ? [requestedLimit] : ['5', '10', '50', '100'];
    
    const results: Record<string, any> = {};
    
    // Test each limit
    for (const limit of limits) {
      console.log(`Testing backend with limit=${limit}...`);
      const apiUrl = `${env.NEWS_API_URL}/news?limit=${limit}`;
      
      try {
        const response = await fetch(apiUrl, {
          method: 'GET',
          headers: {
            'Accept': 'application/json',
          },
          signal: AbortSignal.timeout(10000)
        });
        
        if (!response.ok) {
          results[limit] = {
            error: `API returned status ${response.status}`,
            status: response.status
          };
          continue;
        }
        
        const articles = await response.json();
        results[limit] = {
          requested: parseInt(limit),
          received: articles.length,
          matches: articles.length === parseInt(limit),
          firstArticleId: articles.length > 0 ? articles[0].id : null,
          lastArticleId: articles.length > 0 ? articles[articles.length - 1].id : null
        };
      } catch (error) {
        results[limit] = {
          error: error instanceof Error ? error.message : 'Unknown error'
        };
      }
    }
    
    return NextResponse.json({
      timestamp: new Date().toISOString(),
      apiUrl: env.NEWS_API_URL,
      results
    });
  } catch (error) {
    console.error('Test endpoint error:', error);
    return NextResponse.json(
      { error: 'Failed to test backend', details: error instanceof Error ? error.message : 'Unknown error' },
      { status: 500 }
    );
  }
}