import { NextResponse } from 'next/server';
import { services } from '@/src/data/services';
import { ServiceCheckResult } from '@/src/types/service';

export const dynamic = 'force-dynamic';

async function checkService(service: typeof services[0]): Promise<ServiceCheckResult> {
  const startTime = Date.now();

  try {
    const controller = new AbortController();
    const timeoutId = setTimeout(() => controller.abort(), 5000); // 5 second timeout

    const response = await fetch(service.monitorUrl, {
      method: 'HEAD', // Use HEAD to minimize data transfer
      cache: 'no-store',
      signal: controller.signal,
    });

    clearTimeout(timeoutId);
    const responseTime = Date.now() - startTime;

    let status: ServiceCheckResult['status'];

    if (response.ok) {
      status = responseTime <= 2000 ? 'online' : 'warning';
    } else if (response.status >= 400 && response.status < 500) {
      status = 'warning';
    } else {
      status = 'offline';
    }

    return {
      id: service.id,
      status,
      responseTimeMs: responseTime,
      httpStatus: response.status,
      checkedAt: new Date().toISOString(),
    };
  } catch (error) {
    const responseTime = Date.now() - startTime;

    return {
      id: service.id,
      status: 'offline',
      responseTimeMs: responseTime,
      httpStatus: null,
      checkedAt: new Date().toISOString(),
    };
  }
}

export async function GET() {
  try {
    const results = await Promise.all(
      services.map(service => checkService(service))
    );

    return NextResponse.json(results);
  } catch (error) {
    console.error('Error checking services:', error);
    return NextResponse.json(
      { error: 'Failed to check services' },
      { status: 500 }
    );
  }
}