// Functionality dealing with server-level things

var maxScrollback = 500;

function Server(baseURL, network, authtok, messageHandler) {
  function handleEventSourceLine(line) {
    var lhs = line.split(" :", 1)[0]
  	var parts = lhs.split(' ')
  	var timestamp = new Date(parts[0] * 1000);
    var fullSender = parts[1];
  	var command = parts[2];
  	var sender = parts[3];
  	var forum = parts[4];
  	var args = parts.slice(5);
  	var txt = line.substr(lhs.length + 2);

  	messageHandler(timestamp, fullSender, command, sender, forum, args, txt);
  }

  function handleEventSourceMessage(oEvent) {
    msgs = oEvent.data.split("\n");

    var first = Math.min(0, msgs.length - maxScrollback);
    for (var i = first; i < msgs.length; i += 1) {
      handleEeventSourceLine(msgs[i]);
    }
  }

  function handleEventSourceError(oEvent) {
    timestamp = new Date();
    messageHandler(timestamp, null, "ERROR", null, null, [], null);
  }

  var pullURL = baseURL + "?network=" + encodeURIComponent(network) + "&authtok=" + encodeURIComponent(authtok);
  this.eventSource = new EventSource(baseURL);
  this.eventSource.addEventListener("message", handleEventSourceMessage);
  this.eventSource.addEventListener("error", handleEventSourceError);
}