/* -*- 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" }
  ]

};

//document.cursor = crosshair;

BrowserDetect.init();

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];
}


//document.getElementById("create_task").style.display = '';

/* lws-task protocol */

var down = 0;
var no_last = 1;
var last_x = 0, last_y = 0;
var ctx;
var socket_lm;
var color = "#000000";
var dragged = "";

if (BrowserDetect.browser == "Firefox") {
  socket_lm = new MozWebSocket(get_appropriate_ws_url(), "lws-task-protocol");
} else {
  socket_lm = new WebSocket(get_appropriate_ws_url(),  "lws-task-protocol");
}

try {
  socket_lm.onopen = function() {
    document.getElementById("wslm_status").style.backgroundColor = "#40ff40";
    document.getElementById("wslm_status").textContent = " websocket connection opened ";
    document.getElementById("box").style.display = "none";
  } 

  socket_lm.onmessage = function got_packet(msg) {
    document.getElementById("wslm_lastmsg").textContent = msg.data;
    /*
    m = '';
    escape = false;
    for(i = 0; i < msg.data.length; i++) {
      if(msg.data[i] == '\\' && escape == false) {
        escape = true;
        continue;
      }
      if(escape) m += msg.data[i];
      else {
        if(m += msg.data[i])
      }
    }
    j = m.split(';');
    */
    j = msg.data.split(';');
    f = 0;
    while (f < j.length - 1) {
      i = j[f].split(' ');
      if (i[0] == 'd') {
        ctx.strokeStyle = i[1];
        ctx.beginPath();
        ctx.moveTo(+(i[2]), +(i[3]));
        ctx.lineTo(+(i[4]), +(i[5]));
        ctx.stroke();
      }
      else if (i[0] == 'c') {
        ctx.strokeStyle = i[1];
        ctx.beginPath();
        ctx.arc(+(i[2]), +(i[3]), +(i[4]), 0, Math.PI*2, true); 
        ctx.stroke();
      }
      else if (i[0] == "del") {
        var task = document.getElementById("task_" + i[1]);
//        task.style.display = "none";
        document.body.removeChild(task);
      }
      else if (i[0] == "move") {
        var task = document.getElementById("task_" + i[1]);
        task.style.left = i[2] + "px";
        task.style.top = i[3] + "px";
      }
      else if (i[0] == "add") {
        var task = document.createElement("div");
        task.name = "task";
	task.setAttribute("class", "task");
        task.id = "task_" + i[1];

        var taskText = document.createTextNode(i[2] + ": " + i[3] + " :" + task.id);
        task.appendChild(taskText);

        task.style.position = "absolute";
        task.style.left = i[4] + "px";
        task.style.top = i[5] + "px"; 
	task.setAttribute("onMouseDown", "dragged = '" + i[1] + "';");

        var dlButton = document.createElement("input");
        dlButton.type = "button";
        dlButton.value = "Remove";
//        dlButton.onclick = "deleteTask(document.getElementById(" + task.id + ").id";
        dlButton.setAttribute("onclick", "deleteTask(" + i[1] +")");
        task.appendChild(dlButton);

        document.body.appendChild(task);
      }
      f++;
//      document.getElementById("box").style.top = i[3] + "px";
//      document.getElementById("box").style.left = i[2] + "px";
//      document.getElementById("box").style.display = "block";
    }
  }

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

var canvas = document.createElement('canvas');
canvas.height = 600;
canvas.width = 800;
ctx = canvas.getContext("2d");

document.addEventListener('mousemove', ev_mousemove, false);
document.addEventListener('mouseup', ev_mouseup, false);
/*
canvas.addEventListener('mousedown', ev_mousedown, false);
//cancas.addEventListener('dragend', ev_mousemove, false);
*/

offsetX = offsetY = 0;
element = canvas;
if (element.offsetParent) {
  do {
    offsetX += element.offsetLeft;
    offsetY += element.offsetTop;
  } while ((element = element.offsetParent));
}
 
function update_color() {
  color = document.getElementById("color").value;
}

function ev_mouseup(ev) {
  dragged = '';
}

function ev_mousemove (ev)
{
  if(dragged == '') return;

  var x, y;
  x = ev.clientX;
  y = ev.clientY;

  socket_lm.send("move " + dragged + " " + x + " " + y);
}

function submit() {
  var data = document.getElementById("input_data").value;
  socket_lm.send(data);
}

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

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