(function () {
  var TOKEN_KEYS = ["token", "access_token", "accessToken"];
  var APP_CODE_KEYS = ["app_code", "appCode"];
  var USER_READY_EVENT = "hyapp:user-ready";
  var USER_ERROR_EVENT = "hyapp:user-error";

  function query() {
    var params = new URLSearchParams(window.location.search);
    var hash = window.location.hash || "";
    if (hash.indexOf("?") >= 0) {
      new URLSearchParams(hash.split("?").slice(1).join("?")).forEach(function (value, key) {
        if (!params.has(key)) params.set(key, value);
      });
    }
    return params;
  }

  function first(params, keys) {
    for (var i = 0; i < keys.length; i += 1) {
      var value = params.get(keys[i]);
      if (value) return value;
    }
    return "";
  }

  function parse() {
    var params = query();
    var token = first(params, TOKEN_KEYS);
    var appCode = first(params, APP_CODE_KEYS) || window.localStorage.getItem("hyapp_app_code") || "lalu";

    if (window.HyAppAPI) {
      if (token) window.HyAppAPI.setAccessToken(token);
      if (appCode) window.HyAppAPI.setAppCode(appCode);
    }

    return {
      token: token || (window.HyAppAPI && window.HyAppAPI.getAccessToken ? window.HyAppAPI.getAccessToken() : ""),
      app_code: appCode,
      raw: params
    };
  }

  function emit(name, detail) {
    window.dispatchEvent(new CustomEvent(name, { detail: detail }));
  }

  function loadUser() {
    var current = parse();
    if (!current.token || !window.HyAppAPI) {
      return Promise.resolve(null);
    }
    return window.HyAppAPI.get("/api/v1/users/me/overview").then(function (userInfo) {
      current.user = userInfo;
      window.HyAppParams.current = current;
      emit(USER_READY_EVENT, current);
      return current;
    }).catch(function (error) {
      current.error = error;
      window.HyAppParams.current = current;
      emit(USER_ERROR_EVENT, current);
      throw error;
    });
  }

  window.HyAppParams = {
    parse: parse,
    loadUser: loadUser,
    current: parse(),
    USER_READY_EVENT: USER_READY_EVENT,
    USER_ERROR_EVENT: USER_ERROR_EVENT
  };
})();