(function () {

  // Define our constructor
  this.EventosProgram = function () {

    var self = this;

    // Define option defaults
    var defaults = {
      env: 'production',
      baseURL: 'https://program.eventos.fi'
    }

    // Create options by extending defaults with the passed in arugments
    if (arguments[0] && typeof arguments[0] === "object") {
      this.options = extendDefaults(defaults, arguments[0]);

      // Set baseURL
      if(typeof arguments[0].env !== 'undefined') {
        this.options.baseURL = setBaseURL(arguments[0].env)
      }
    }

    // Init
    this.init = function () {
      var eventosFormStyles = document.createElement("link");
      eventosFormStyles.href = self.options.baseURL + "/static/css/widget.css";
      eventosFormStyles.rel = "stylesheet";
      document.getElementsByTagName("head")[0].appendChild(eventosFormStyles);
      var eventosFormScript = document.createElement("script");
      eventosFormScript.src = (self.options.baseURL + "/static/js/widget.js");
      document.getElementsByTagName("head")[0].appendChild(eventosFormScript);
      eventosFormScript.onload = function (response) {
        if(typeof eventos.initEventosProgram !== 'undefined') {
          eventos.initEventosProgram(self.options);
        }
      };
    };
  }

  // Utility method to extend defaults with user options
  function extendDefaults(source, properties) {
    var property;
    for (property in properties) {
      if (properties.hasOwnProperty(property)) {
        source[property] = properties[property];
      }
    }
    return source;
  }

  function setBaseURL(env) {
    switch(env) {
      case 'local':
        return 'https://program.eventos2.local';
      case 'development':
        return 'https://program-dev.eventos.fi';
      case 'staging':
          return 'https://program-staging.eventos.fi';
      default:
          return 'https://program.eventos.fi';
    }
  }

}());