import { NextRequest } from 'next/server';
import { readFileSync, existsSync } from 'fs';
import { LogsApiResponse, LogsApiError } from '../../../types';

export async function GET(request: NextRequest): Promise<Response> {
  try {
    const { searchParams } = new URL(request.url);
    const lines = parseInt(searchParams.get('lines') || '50');
    const logPath = searchParams.get('logPath') || process.env.LOG_FILE_PATH || './ai-dev-tools/consolidated.log';
    
    if (!existsSync(logPath)) {
      const errorResponse: LogsApiError = { error: 'Log file not found' };
      return Response.json(errorResponse, { status: 404 });
    }
    
    const logContent = readFileSync(logPath, 'utf-8');
    const allLines = logContent.split('\n').filter(line => line.trim());
    const tailLines = allLines.slice(-lines);
    
    const response: LogsApiResponse = {
      logs: tailLines.join('\n'),
      total: allLines.length
    };
    
    return Response.json(response);
  } catch (error) {
    const errorResponse: LogsApiError = {
      error: error instanceof Error ? error.message : 'Unknown error'
    };
    return Response.json(errorResponse, { status: 500 });
  }
}