/* -*- Mode: javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set et sw=2 ts=2: */

var BrowserDetect = {
  init: function () {
    this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
    this.version = this.searchVersion(navigator.userAgent)
      || this.searchVersion(navigator.appVersion)
      || "an unknown version";
    this.OS = this.searchString(this.dataOS) || "an unknown OS";
  },
  searchString: function (data) {
    for (var i=0;i<data.length;i++)  {
      var dataString = data[i].string;
      var dataProp = data[i].prop;
      this.versionSearchString = data[i].versionSearch || data[i].identity;
      if (dataString) {
        if (dataString.indexOf(data[i].subString) != -1)
          return data[i].identity;
      }
      else if (dataProp)
        return data[i].identity;
    }
  },
  searchVersion: function (dataString) {
    var index = dataString.indexOf(this.versionSearchString);
    if (index == -1) return;
    return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
  },
  dataBrowser: [ { string: navigator.userAgent, subString: "Chrome", identity: "Chrome" },
                 { string: navigator.userAgent, subString: "OmniWeb", versionSearch: "OmniWeb/",
                   identity: "OmniWeb" },
                 { string: navigator.vendor, subString: "Apple", identity: "Safari",
                   versionSearch: "Version" },
                 { prop: window.opera, identity: "Opera", versionSearch: "Version" },
                 { string: navigator.vendor, subString: "iCab", identity: "iCab" },
                 { string: navigator.vendor, subString: "KDE", identity: "Konqueror" },
                 { string: navigator.userAgent, subString: "Firefox", identity: "Firefox" },
                 { string: navigator.vendor, subString: "Camino", identity: "Camino" },
                 // for newer Netscapes (6+)
                 { string: navigator.userAgent, subString: "Netscape", identity: "Netscape" },
                 { string: navigator.userAgent, subString: "MSIE", identity: "Explorer",
                   versionSearch: "MSIE" },
                 { string: navigator.userAgent, subString: "Gecko", identity: "Mozilla",
                   versionSearch: "rv" } ,
                 // for older Netscapes (4-)
                 { string: navigator.userAgent, subString: "Mozilla", identity: "Netscape",
                   versionSearch: "Mozilla" }
  ],
  dataOS : [ { string: navigator.platform, subString: "Win", identity: "Windows" },
             { string: navigator.platform, subString: "Mac", identity: "Mac" },
             { string: navigator.userAgent, subString: "iPhone", identity: "iPhone/iPod" },
             { string: navigator.platform, subString: "Linux", identity: "Linux" }
  ]

};

BrowserDetect.init();

function createId(boardid, taskid)
{
  return "b" + boardid + "_t" + taskid;
}

function idFromStr(str)
{
  return str.substring(str.search('t') + 1, str.length);
}

function get_appropriate_ws_url()
{
    var pcol;
    var u = document.URL;

    /*
     * We open the websocket encrypted if this page came on an
     * https:// url itself, otherwise unencrypted
     */

    if (u.substring(0, 5) == "https") {
        pcol = "wss://";
        u = u.substr(8);
    } else {
        pcol = "ws://";
        if (u.substring(0, 4) == "http")
            u = u.substr(7);
    }

    u = u.split('/');

    return pcol + u[0];
}

var socket_task;

var boards = document.getElementById("boards");

if (BrowserDetect.browser == "Firefox" && BrowserDetect.version < 12) {
    socket_task = new MozWebSocket(get_appropriate_ws_url(), "lws-task-protocol");
} else {
    socket_task = new WebSocket(get_appropriate_ws_url(),  "lws-task-protocol");
}

try {
    socket_task.onopen = function() {
        document.getElementById("wstask_status").style.backgroundColor = "#40ff40";
        document.getElementById("wstask_status").textContent = "TaskProto websocket connection opened ";
        socket_task.send("observe 0;");
    } 

    socket_task.onmessage = function got_packet(msg) {
        document.getElementById("wstask_lastmsg").textContent = msg.data;
        
        var msgs = new Array();
        var idx = 0;
        msgs[idx] = '';
        var c = 0;
        var instring = false;
        for(c = 0; c < msg.data.length; c++) {
            if(msg.data[c] == '"' && c > 0 && msg.data[c - 1] != '\\') instring = !instring;
            if(msg.data[c] == ';' && instring == false) {
                idx++;
                msgs[idx] = '';
            }
            if(msg.data[c] != ';' || instring == true) msgs[idx] += msg.data[c];
        }

        f = 0;
        while (f < msgs.length - 1) {
            var msg = new Array();
            instring = false;
            idx = 0;

            // strip padding and trailing whitespace.
            var msgstr = msgs[f].replace(/^\s+||\s+$/g,'');

            msg[idx] = '';
            for(c = 0; c < msgstr.length; c++) {
                if(msgstr[c] == '"' && c > 0 && msgstr[c - 1] != '\\') {
                    instring = !instring;
                    continue;
                }
                if(msgstr[c] == ' ' && instring == false) {
                    msg[idx] = msg[idx].replace("\\\\","\\").replace("\\\"","\"");
                    idx++;
                    msg[idx] = '';
                }
                if(msgstr[c] != ' ' || instring == true) msg[idx] += msgstr[c];
            }

            var observeid = msg[0];
            var cmd = msg[1];
            var id = msg[2];

            var board = document.getElementById("board_" + observeid);
            if(!board) {
              board = document.createElement("div");
              board.name = "board";
              board.setAttribute("class", "board");
              board.id = "board_" + observeid;
              boards.appendChild(board);
            }

            if(cmd == "remove") {
              var task = document.getElementById(createId(observeid, id));
                task.parentNode.removeChild(task);
            }
            else if(cmd == "move") {
	              var parent_id = msg[3];
                var task = document.getElementById(createId(observeid, id));
                if(parent_id != -1) {
                  var parent_task = document.getElementById(createId(observeid, parent_id));
                  parent_task.appendChild(task);
                }
                else {
                    board.appendChild(task);
                }
            }
            else if(cmd == "create") {
	              var parent_id = msg[3];
                var task = document.createElement("div");

                task.name = "task";
                task.setAttribute("class", "task");
                task.setAttribute("ondblclick", "editTitle(this, event)");
                task.setAttribute("onclick", "showHideChildren(this, event)");
                task.setAttribute("ondrop", "drop(this, event)");
                task.setAttribute("ondragover", "return false");
                task.setAttribute("draggable", true);
                task.setAttribute("ondragstart", "drag(this, event)");
                task.setAttribute("title", id);

	              task.id = createId(observeid, id);

                var txtdiv = document.createElement("div");
                txtdiv.id = createId(observeid, id) + "_txt";
                var txt = document.createTextNode("");
	              txtdiv.appendChild(txt);
	              task.appendChild(txtdiv);
	                    	        
                var parent_task = document.getElementById(createId(observeid, parent_id));

	              if(parent_task) {
                    parent_task.appendChild(task);
	              }
	              else {
                    board.appendChild(task);
	              }
            }
            else if(cmd == "update") {
                var name = msg[3];
                var value = msg[4];
                if(name == "title") {
                    var txtdiv = document.getElementById(createId(observeid, id) + "_txt");
                    txtdiv.removeChild(txtdiv.firstChild);

                    var txt = document.createTextNode(value);
	                  txtdiv.appendChild(txt);
                }
                if(name == "colour") {
                    var txtdiv = document.getElementById(createId(observeid, id) + "_txt");
                    txtdiv.style.color = value;
                }
            }
            f++;
        }
    }

    socket_task.onclose = function(){
        document.getElementById("wstask_status").style.backgroundColor = "#ff4040";
        document.getElementById("wstask_status").textContent = "TaskProto websocket connection CLOSED ";
    }
} catch(exception) {
    alert('<p>Error' + exception + '</p>');
}

function task_submit() {
    var data = document.getElementById("input_task_data").value;
    socket_task.send(data);
}

function clear() {
    document.getElementById("input_data").value = "";
}

function deleteTask(id) {
    socket_task.send("del " + id + ";");
}

function drag(target, e) {
    e.dataTransfer.setData('Text', target.id);
    e.stopPropagation(); // <--- this fixes the drag target problem
}

function drop(target, e) {
    e.preventDefault();
    e.stopPropagation();

    var id = e.dataTransfer.getData('Text');
    var task = document.getElementById(id);
    socket_task.send("move " + idFromStr(id) + " " + idFromStr(target.id) + ";");
}

function showHideChildren(target, e)
{
  e.stopPropagation();
  updateid = idFromStr(target.id);
  if(target.style.backgroundColor != "red") {
    target.style.backgroundColor = "red";
    for(var i = 1; i < target.childNodes.length; i++) {
      target.childNodes[i].style.display = "none";
    }
  } else {
    target.style.backgroundColor = "grey";
    for(var i = 1; i < target.childNodes.length; i++) {
      target.childNodes[i].style.display = "block";
    }
  }
}

//
// Butt ugly.. but hey! it works...
//
var updateid;
var divtxt;
var oldtxt;
var oldtitle;
function onKeyUpHandler(target, e)
{
  if(e.which == 13) { // enter
    divtxt.removeChild(target);
    oldtxt.nodeValue = 'updating...';
    socket_task.send("update " + updateid + " \""+target.value+"\";");
  }
  if(e.which == 27) { // escape
    divtxt.removeChild(target);
    oldtxt.nodeValue = oldtitle;
  }
}

function onLostFocusHandler(target, e)
{
  if(target.value == oldtitle) {
    divtxt.removeChild(target);
    oldtxt.nodeValue = oldtitle;
  }
}

function editTitle(target, e)
{
  e.stopPropagation();
  updateid = idFromStr(target.id);
  if(updateid < 10) return;
  var inp = document.createElement("input");
  var txtdiv = document.getElementById(target.id + "_txt");
  divtxt = txtdiv;
  oldtxt = txtdiv.firstChild;
  oldtitle = oldtxt.nodeValue;
  oldtxt.nodeValue = "";
  inp.setAttribute("onkeyup", "onKeyUpHandler(this, event)");
  inp.setAttribute("onblur", "onLostFocusHandler(this, event)");
  inp.setAttribute("style", "border: inherit; padding: inherit; margin: inherit; background: inherit;");
  inp.value = oldtitle;
  lineedit = inp;
  txtdiv.appendChild(inp);
  inp.focus();
}