function shouldChaos() {
  return Math.random() < 0.13; // 13% chaos for R2
}

function getChaoticR2Response() {
  const chaos = Math.random();
  if (chaos < 0.2) {
    // Access denied
    return new Response(
      '<?xml version="1.0" encoding="UTF-8"?><Error><Code>AccessDenied</Code><Message>Access Denied</Message></Error>',
      { status: 403, headers: { 'Content-Type': 'application/xml' } }
    );
  } else if (chaos < 0.4) {
    // Object not found
    return new Response(
      '<?xml version="1.0" encoding="UTF-8"?><Error><Code>NoSuchKey</Code></Error>',
      { status: 404, headers: { 'Content-Type': 'application/xml' } }
    );
  } else if (chaos < 0.6) {
    // Bandwidth limit exceeded
    return new Response('Rate limit exceeded', { status: 429 });
  } else if (chaos < 0.8) {
    // Corrupted metadata
    return new Response('corrupted object content', {
      headers: {
        'Content-Type': 'text/plain',
        'CF-R2-Metadata-Size': 'not-a-number', // Invalid metadata
        ETag: 'invalid-etag-format',
      },
    });
  } else {
    // Wrong content type but valid data
    return new Response(JSON.stringify({ not: 'xml', but: 'json' }), {
      headers: { 'Content-Type': 'application/xml' }, // Lying about content type
    });
  }
}

export default {
  async fetch(request, env, ctx) {
    // Random chaos injection
    if (shouldChaos()) {
      return getChaoticR2Response();
    }

    const { pathname } = new URL(request.url);
    const method = request.method;

    if (method === 'GET' && pathname !== '/') {
      // GET object
      return new Response('test-object-content', {
        headers: {
          'Content-Type': 'text/plain',
          'CF-R2-Metadata-Size': '18',
        },
      });
    } else if (method === 'PUT') {
      // PUT object
      return new Response(
        JSON.stringify({
          etag: 'mock-etag-' + Math.random().toString(36).substr(2, 9),
        }),
        {
          headers: { 'Content-Type': 'application/json' },
        }
      );
    } else if (method === 'GET' && pathname === '/') {
      // LIST objects (sometimes return inconsistent results)
      const objects = [{ key: 'test-object', metadata: { size: 18 } }];
      if (Math.random() < 0.1) {
        // Sometimes add random objects to list
        objects.push({
          key: 'mystery-object',
          metadata: { size: Math.floor(Math.random() * 1000) },
        });
      }

      return new Response(
        JSON.stringify({
          keys: objects,
          is_truncated: Math.random() < 0.05, // Sometimes claim truncation
        }),
        {
          headers: { 'Content-Type': 'application/json' },
        }
      );
    }

    return new Response('R2 mock ready', { status: 200 });
  },
};