addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
})

async function handleRequest(request) {
  const { pathname } = new URL(request.url);
  const username = pathname.split('/')[1];

  if (!username) {
    return new Response(
      'Simple API to fetch GitHub Sponsors of a given user 💖\nUsage: GET /[username]',
      { status: 200 }
    );
  }

  const query = `
    query {
      user(login: "${username}") {
        sponsorshipsAsMaintainer(first: 100) {
          edges {
            node {
              sponsorEntity {
                ... on User {
                  login
                  name
                  avatarUrl
                }
                ... on Organization {
                  name
                  avatarUrl
                }
              }
            }
          }
        }
      }
    }
  `;

  try {
    const apiResponse = await fetch('https://api.github.com/graphql', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/json',
        'Authorization': `bearer ${GH_API_TOKEN}`,
        'User-Agent': 'GetUserSponsors'
      },
      body: JSON.stringify({ query })
    });

    const result = await apiResponse.json();

    if (!apiResponse.ok) {
      throw new Error(result.errors ? result.errors.map(e => e.message).join('; ') : 'Failed to fetch GitHub data');
    }

    // Extracting sponsor details
    const sponsors = result.data.user.sponsorshipsAsMaintainer.edges.map(edge => edge.node.sponsorEntity);

    return new Response(JSON.stringify(sponsors), {
      headers: { 'Content-Type': 'application/json' },
    });
  } catch (error) {
    return new Response(error.message, { status: 500 });
  }
}