(function () {
  'use strict';

  angular.module('app.service')
    .factory('$exceptionHandler', ['$log', '$window', 'cfg', function ($log, $window, cfg) {

      function formatError(arg) {
        if (arg instanceof Error) {
          if (arg.stack) {
            arg = (arg.message && arg.stack.indexOf(arg.message) === -1)
              ? 'Error: ' + arg.message + '\n' + arg.stack
              : arg.stack;
          } else if (arg.sourceURL) {
            arg = arg.message + '\n' + arg.sourceURL + ':' + arg.line;
          }
        }
        return arg;
      }

      return function (exception, cause) {
        $log.error.apply($log, arguments);
        if (cfg.debug && 'ontouchstart' in document.documentElement) {
          alert('Exception: ' + formatError(exception));
        }
      };
    }]);

})();