function updateEmbedSrcParams() {
  var $embedCodeParams = "?";
  var $streamMode = getStreamMode();
  if ($streamMode == "manual") {
    var $stream = $("input[name=player_stream_url]:radio:checked").val();
    $embedCodeParams += "stream=" + $stream;
  } else if ($streamMode == "auto") {
    $embedCodeParams += "stream=auto";
  }

  $embedCodeParams += "&title=" + getPlayerTitle();

  $embedCodeParams += '"';

  $("textarea[name=player_embed_src]").val(function (index, value) {
    return value.replace(/\?.*?"/, $embedCodeParams);
  });

  updatePlayerIframeSrc($("textarea[name=player_embed_src]").val());
}

function updatePlayerIframeSrc(iframe_text) {
  var $player_iframe = $("#player_form iframe");
  var player_iframe_src = iframe_text.match(/http.*?"/)[0].slice(0, -1);
  $player_iframe.attr("src", player_iframe_src);
}

function getStreamMode() {
  return $("input[name=player_stream_mode]:radio:checked").val();
}

function getPlayerTitle() {
  return $("input[name=player_title]").val();
}

$(document).ready(function () {
  $("#player_stream_url-element").hide();

  // stream mode change event
  $("#player_stream_mode-element").change(function () {
    var $streamMode = getStreamMode();

    if ($streamMode == "auto") {
      $("#player_stream_url-element").hide();
    } else if ($streamMode == "manual") {
      $("#player_stream_url-element").show();

      $("input[name=player_stream_url]").each(function (i, obj) {
        if ($(this).parent().text().toLowerCase().indexOf("opus") >= 0) {
          $(this).attr("disabled", "disabled");
        }
      });
    }

    updateEmbedSrcParams();
  });

  // stream url change event
  $("#player_stream_url-element").change(function () {
    updateEmbedSrcParams();
  });

  // display title checkbox change event
  $("#player_display_title").change(function () {
    if ($(this).prop("checked")) {
      $("#player_title-label").show();
      $("#player_title-element").show();
    } else {
      $("#player_title-label").hide();
      $("#player_title-element").hide();
    }
    updateEmbedSrcParams();
  });

  // title textbox change event
  // setup before functions
  var typingTimer;
  var doneTypingInterval = 3000;

  // on keyup, start the countdown
  $("input[name=player_title]").keyup(function () {
    clearTimeout(typingTimer);
    typingTimer = setTimeout(updateEmbedSrcParams, doneTypingInterval);
  });

  // on keydown, clear the countdown
  $("input[name=player_title]").keydown(function () {
    clearTimeout(typingTimer);
  });
});