function normalizeServerUrl(serverUrl) {
  return serverUrl.trim().replace(/\/+$/, "");
}

export function buildApiBaseUrl(serverUrl) {
  const normalized = normalizeServerUrl(serverUrl);
  return normalized.endsWith("/api/v1") ? normalized : `${normalized}/api/v1`;
}

export function buildHeaders(serverConfig) {
  const headers = {
    Accept: "application/json",
  };

  if (serverConfig.authMethod === "token" && serverConfig.token) {
    headers.Authorization = `token ${serverConfig.token}`;
  } else if (
    serverConfig.authMethod === "password" &&
    serverConfig.username &&
    serverConfig.password
  ) {
    headers.Authorization = `Basic ${btoa(
      `${serverConfig.username}:${serverConfig.password}`
    )}`;
  }

  return headers;
}

export async function fetchRepositories(serverConfig, page = 1, limit = 50) {
  const apiBase = buildApiBaseUrl(serverConfig.serverUrl);
  const url = `${apiBase}/user/repos?page=${page}&limit=${limit}&sort=updated`;
  const response = await fetch(url, {
    headers: buildHeaders(serverConfig),
  });

  if (!response.ok) {
    throw new Error(`Gitea API error: ${response.status}`);
  }
  return response.json();
}