'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

const REGEX_IS_INSTALLATION_LEGACY = /^v1\./;
const REGEX_IS_INSTALLATION = /^ghs_/;
const REGEX_IS_USER_TO_SERVER = /^ghu_/;
async function auth(token) {
  const isApp = token.split(/\./).length === 3;
  const isInstallation = REGEX_IS_INSTALLATION_LEGACY.test(token) || REGEX_IS_INSTALLATION.test(token);
  const isUserToServer = REGEX_IS_USER_TO_SERVER.test(token);
  const tokenType = isApp ? "app" : isInstallation ? "installation" : isUserToServer ? "user-to-server" : "oauth";
  return {
    type: "token",
    token: token,
    tokenType
  };
}

/**
 * Prefix token for usage in the Authorization header
 *
 * @param token OAuth token or JSON Web Token
 */
function withAuthorizationPrefix(token) {
  if (token.split(/\./).length === 3) {
    return `bearer ${token}`;
  }

  return `token ${token}`;
}

async function hook(token, request, route, parameters) {
  const endpoint = request.endpoint.merge(route, parameters);
  endpoint.headers.authorization = withAuthorizationPrefix(token);
  return request(endpoint);
}

const createTokenAuth = function createTokenAuth(token) {
  if (!token) {
    throw new Error("[@octokit/auth-token] No token passed to createTokenAuth");
  }

  if (typeof token !== "string") {
    throw new Error("[@octokit/auth-token] Token passed to createTokenAuth is not a string");
  }

  token = token.replace(/^(token|bearer) +/i, "");
  return Object.assign(auth.bind(null, token), {
    hook: hook.bind(null, token)
  });
};

exports.createTokenAuth = createTokenAuth;
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