/**
 *  author:		Timothy Groves - http://www.brandspankingnew.net
 *	version:	1.2 - 2006-11-17
 *              1.3 - 2006-12-04
 *              2.0 - 2007-02-07
 *              2.1.1 - 2007-04-13
 *              2.1.2 - 2007-07-07
 *              2.1.3 - 2007-07-19
 *
 */

if (typeof(bsn) == "undefined") _b = bsn = {};

if (typeof(_b.Autosuggest) == "undefined") _b.Autosuggest = {};
else alert("Autosuggest is already set!");



_b.AutoSuggest = function (id, param) {
  // no DOM - give up!
  //
  if (!document.getElementById) return 0;

  // get field via DOM
  //
  this.fld = _b.DOM.gE(id);

  if (!this.fld) return 0;

  // init variables
  //
  this.sInp = "";
  this.nInpC = 0;
  this.aSug = [];
  this.iHigh = 0;

  // parameters object
  //
  this.oP = param ? param : {};

  // defaults	
  //
  var k, def = {
    minchars: 1,
    meth: "get",
    varname: "input",
    className: "autosuggest",
    timeout: 2500,
    delay: 500,
    offsety: -5,
    shownoresults: true,
    noresults: "No results!",
    maxheight: 250,
    cache: true,
    maxentries: 25
  };
  for (k in def) {
    if (typeof(this.oP[k]) != typeof(def[k])) this.oP[k] = def[k];
  }

  // set keyup handler for field
  // and prevent autocomplete from client
  //
  var p = this;

  // NOTE: not using addEventListener because UpArrow fired twice in Safari
  //_b.DOM.addEvent( this.fld, 'keyup', function(ev){ return pointer.onKeyPress(ev); } );
  this.fld.onkeypress = function (ev) {
    return p.onKeyPress(ev);
  };
  this.fld.onkeyup = function (ev) {
    return p.onKeyUp(ev);
  };

  this.fld.setAttribute("autocomplete", "off");
};


/**
 * function getValAfter
 * $Id:2009-08-31$
 * @author: thanhnv
 * get value after last comma
*/
_b.AutoSuggest.prototype.getValAfter = function(val)
{
	if(val.indexOf(',') != -1) {
		var pos = val.lastIndexOf(',');
		val = val.substr(pos+1);
	}
	//alert(val);
	return val;
}
/**
 * function getValAfter
 * $Id:2009-08-31$
 * @author: thanhnv
 * get value before last comma
*/
_b.AutoSuggest.prototype.getValBefore = function(val)
{
	if(val.indexOf(',') != -1) {
		var pos = val.lastIndexOf(',');
		val = val.substr(0, pos+1);
	}
	return val;
}

_b.AutoSuggest.prototype.onKeyPress = function (ev) {

  var key = (window.event) ? window.event.keyCode : ev.keyCode;

  // set responses to keydown events in the field
  // this allows the user to use the arrow keys to scroll through the results
  // ESCAPE clears the list
  // TAB sets the current highlighted value
  //
  var RETURN = 13;
  var TAB = 9;
  var ESC = 27;

  var bubble = 1;

  switch (key) {
  case RETURN:
    this.setHighlightedValue();
    bubble = 0;
    break;

  case ESC:
    this.clearSuggestions();
    break;
  }

  return bubble;
};

_b.AutoSuggest.prototype.onKeyUp = function (ev) {
  var key = (window.event) ? window.event.keyCode : ev.keyCode;

  // set responses to keydown events in the field
  // this allows the user to use the arrow keys to scroll through the results
  // ESCAPE clears the list
  // TAB sets the current highlighted value
  //
  var ARRUP = 38;
  var ARRDN = 40;

  var bubble = 1;

  switch (key) {

  case ARRUP:
    this.changeHighlight(key);
    bubble = 0;
    break;

  case ARRDN:
    this.changeHighlight(key);
    bubble = 0;
    break;

  default:
    /**
	 * $2009-08-31$
	 * @modifier: thanhnv <vietthanh.nguyen@gmail.com>
	 * @desc: search only words after last comma
	 * @desc: ex.. GOOG, YHO => search YHO
	*/
	var val = this.getValAfter(this.fld.value);
	this.getSuggestions(val);
	/**
	 * end of thanhnv modify
	*/
    //this.getSuggestions(this.fld.value);
  }

  return bubble;

};

_b.AutoSuggest.prototype.getSuggestions = function (val) {

  // if input stays the same, do nothing
  //
  if (val == this.sInp) return 0;

  // kill list
  //
  _b.DOM.remE(this.idAs);

  this.sInp = val;

  // input length is less than the min required to trigger a request
  // do nothing
  //
  if (val.length < this.oP.minchars) {
    this.aSug = [];
    this.nInpC = val.length;
    return 0;
  }

  var ol = this.nInpC; // old length
  this.nInpC = val.length ? val.length : 0;

  // if caching enabled, and user is typing (ie. length of input is increasing)
  // filter results out of aSuggestions from last request
  //
  var l = this.aSug.length;
  if (this.nInpC > ol && l && l < this.oP.maxentries && this.oP.cache) {
    var arr = [];
    for (var i = 0; i < l; i++) {
      if (this.aSug[i].value.substr(0, val.length).toLowerCase() == val.toLowerCase()) arr.push(this.aSug[i]);
    }
    this.aSug = arr;

    this.createList(this.aSug);

    return false;
  }
  else
  // do new request
  //
  {
    var pointer = this;
    var input = this.sInp;
    clearTimeout(this.ajID);
    this.ajID = setTimeout(function () {
      pointer.doAjaxRequest(input)
    },
    this.oP.delay);
  }

  return false;
};

_b.AutoSuggest.prototype.doAjaxRequest = function (input) {
  // check that saved input is still the value of the field
  //
  if (input != this.getValAfter(this.fld.value)) return false;

  var pointer = this;

  // create ajax request
  //
  if (typeof(this.oP.script) == "function") var url = this.oP.script(encodeURIComponent(this.sInp));
  else var url = this.oP.script + this.oP.varname + "=" + encodeURIComponent(this.sInp);

  if (!url) return false;

  var meth = this.oP.meth;
  var input = this.sInp;

  var onSuccessFunc = function (req) {
    pointer.setSuggestions(req, input)
  };
  var onErrorFunc = function (status) {
    alert("AJAX error: " + status);
  };

  var myAjax = new _b.Ajax();
  myAjax.makeRequest(url, meth, onSuccessFunc, onErrorFunc);
};

_b.AutoSuggest.prototype.setSuggestions = function (req, input) {
  // if field input no longer matches what was passed to the request
  // don't show the suggestions
  //
  if (input != this.getValAfter(this.fld.value)) return false;

  this.aSug = [];

  if (this.oP.json) {
    var jsondata = eval('(' + req.responseText + ')');

    for (var i = 0; i < jsondata.results.length; i++) {
      this.aSug.push({
        'id': jsondata.results[i].id,
        'value': jsondata.results[i].value,
        'info': jsondata.results[i].info
      });
    }
  }
  else {

    var xml = req.responseXML;

    // traverse xml
    //
    var results = xml.getElementsByTagName('results')[0].childNodes;

    for (var i = 0; i < results.length; i++) {
      if (results[i].hasChildNodes()) this.aSug.push({
        'id': results[i].getAttribute('id'),
        'value': results[i].childNodes[0].nodeValue,
        'info': results[i].getAttribute('info')
      });
    }

  }

  this.idAs = "as_" + this.fld.id;

  this.createList(this.aSug);

};

_b.AutoSuggest.prototype.createList = function (arr) {
  var pointer = this;

  // get rid of old list
  // and clear the list removal timeout
  //
  _b.DOM.remE(this.idAs);
  this.killTimeout();

  // if no results, and shownoresults is false, do nothing
  //
  if (arr.length == 0 && !this.oP.shownoresults) return false;

  // create holding div
  //
  var div = _b.DOM.cE("div", {
    id: this.idAs,
    className: this.oP.className
  });

  var hcorner = _b.DOM.cE("div", {
    className: "as_corner"
  });
  var hbar = _b.DOM.cE("div", {
    className: "as_bar"
  });
  var header = _b.DOM.cE("div", {
    className: "as_header"
  });
  header.appendChild(hcorner);
  header.appendChild(hbar);
  div.appendChild(header);

  // create and populate ul
  //
  var ul = _b.DOM.cE("ul", {
    id: "as_ul"
  });

  // loop throught arr of suggestions
  // creating an LI element for each suggestion
  //
  for (var i = 0; i < arr.length; i++) {
    // format output with the input enclosed in a EM element
    // (as HTML, not DOM)
    //
    var val = arr[i].value;
    var st = val.toLowerCase().indexOf(this.sInp.toLowerCase());
    var output = val.substring(0, st) + "<em>" + val.substring(st, st + this.sInp.length) + "</em>" + val.substring(st + this.sInp.length);

    var span = _b.DOM.cE("span", {},
    output, true);
    if (arr[i].info != "") {
      var br = _b.DOM.cE("br", {});
      span.appendChild(br);
      var small = _b.DOM.cE("small", {},
      arr[i].info);
      span.appendChild(small);
    }

    var a = _b.DOM.cE("a", {
      href: "#"
    });

    var tl = _b.DOM.cE("span", {
      className: "tl"
    },
    " ");
    var tr = _b.DOM.cE("span", {
      className: "tr"
    },
    " ");
    a.appendChild(tl);
    a.appendChild(tr);

    a.appendChild(span);

    a.name = i + 1;
    a.onclick = function () {
      pointer.setHighlightedValue();
      return false;
    };
    a.onmouseover = function () {
      pointer.setHighlight(this.name);
    };

    var li = _b.DOM.cE("li", {},
    a);

    ul.appendChild(li);
  }

  // no results
  //
  if (arr.length == 0 && this.oP.shownoresults) {
    var li = _b.DOM.cE("li", {
      className: "as_warning"
    },
    this.oP.noresults);
    ul.appendChild(li);
  }

  div.appendChild(ul);

  var fcorner = _b.DOM.cE("div", {
    className: "as_corner"
  });
  var fbar = _b.DOM.cE("div", {
    className: "as_bar"
  });
  var footer = _b.DOM.cE("div", {
    className: "as_footer"
  });
  footer.appendChild(fcorner);
  footer.appendChild(fbar);
  div.appendChild(footer);

  // get position of target textfield
  // position holding div below it
  // set width of holding div to width of field
  //
  var pos = _b.DOM.getPos(this.fld);

  div.style.left = pos.x + "px";
  div.style.top = (pos.y + this.fld.offsetHeight + this.oP.offsety) + "px";
  div.style.width = this.fld.offsetWidth + "px";

  // set mouseover functions for div
  // when mouse pointer leaves div, set a timeout to remove the list after an interval
  // when mouse enters div, kill the timeout so the list won't be removed
  //
  div.onmouseover = function () {
    pointer.killTimeout()
  };
  div.onmouseout = function () {
    pointer.resetTimeout()
  };

  // add DIV to document
  //
  document.getElementsByTagName("body")[0].appendChild(div);

  // currently no item is highlighted
  //
  this.iHigh = 0;

  // remove list after an interval
  //
  var pointer = this;
  this.toID = setTimeout(function () {
    pointer.clearSuggestions()
  },
  this.oP.timeout);
};

_b.AutoSuggest.prototype.changeHighlight = function (key) {
  var list = _b.DOM.gE("as_ul");
  if (!list) return false;

  var n;

  if (key == 40) n = this.iHigh + 1;
  else if (key == 38) n = this.iHigh - 1;

  if (n > list.childNodes.length) n = list.childNodes.length;
  if (n < 1) n = 1;

  this.setHighlight(n);
};

_b.AutoSuggest.prototype.setHighlight = function (n) {
  var list = _b.DOM.gE("as_ul");
  if (!list) return false;

  if (this.iHigh > 0) this.clearHighlight();

  this.iHigh = Number(n);

  list.childNodes[this.iHigh - 1].className = "as_highlight";

  this.killTimeout();
};

_b.AutoSuggest.prototype.clearHighlight = function () {
  var list = _b.DOM.gE("as_ul");
  if (!list) return false;

  if (this.iHigh > 0) {
    list.childNodes[this.iHigh - 1].className = "";
    this.iHigh = 0;
  }
};

_b.AutoSuggest.prototype.setHighlightedValue = function () {
  if (this.iHigh) {
	var val = this.getValBefore(this.fld.value);
	
	
	if(val.indexOf(',') == -1)
	  val = '';
	
    this.sInp = this.fld.value = val + this.aSug[this.iHigh - 1].value;

    // move cursor to end of input (safari)
    //
    this.fld.focus();
    if (this.fld.selectionStart) this.fld.setSelectionRange(this.sInp.length, this.sInp.length);

    this.clearSuggestions();

    // pass selected object to callback function, if exists
    //
    if (typeof(this.oP.callback) == "function") this.oP.callback(this.aSug[this.iHigh - 1]);
  }
};

_b.AutoSuggest.prototype.killTimeout = function () {
  clearTimeout(this.toID);
};

_b.AutoSuggest.prototype.resetTimeout = function () {
  clearTimeout(this.toID);
  var pointer = this;
  this.toID = setTimeout(function () {
    pointer.clearSuggestions()
  },
  1000);
};

_b.AutoSuggest.prototype.clearSuggestions = function () {

  this.killTimeout();

  var ele = _b.DOM.gE(this.idAs);
  var pointer = this;
  if (ele) {
    var fade = new _b.Fader(ele, 1, 0, 250, function () {
      _b.DOM.remE(pointer.idAs)
    });
  }
};

// AJAX PROTOTYPE _____________________________________________

if (typeof(_b.Ajax) == "undefined") _b.Ajax = {};

_b.Ajax = function () {
  this.req = {};
  this.isIE = false;
};

_b.Ajax.prototype.makeRequest = function (url, meth, onComp, onErr) {

  if (meth != "POST") meth = "GET";

  this.onComplete = onComp;
  this.onError = onErr;

  var pointer = this;

  // branch for native XMLHttpRequest object
  if (window.XMLHttpRequest) {
    this.req = new XMLHttpRequest();
    this.req.onreadystatechange = function () {
      pointer.processReqChange()
    };
    this.req.open("GET", url, true); //
    this.req.send(null);
    // branch for IE/Windows ActiveX version
  }
  else if (window.ActiveXObject) {
    this.req = new ActiveXObject("Microsoft.XMLHTTP");
    if (this.req) {
      this.req.onreadystatechange = function () {
        pointer.processReqChange()
      };
      this.req.open(meth, url, true);
      this.req.send();
    }
  }
};

_b.Ajax.prototype.processReqChange = function () {

  // only if req shows "loaded"
  if (this.req.readyState == 4) {
    // only if "OK"
    if (this.req.status == 200) {
      this.onComplete(this.req);
    } else {
      this.onError(this.req.status);
    }
  }
};

// DOM PROTOTYPE _____________________________________________

if (typeof(_b.DOM) == "undefined") _b.DOM = {};

/* create element */
_b.DOM.cE = function (type, attr, cont, html) {
  var ne = document.createElement(type);
  if (!ne) return 0;

  for (var a in attr)
  ne[a] = attr[a];

  var t = typeof(cont);

  if (t == "string" && !html) ne.appendChild(document.createTextNode(cont));
  else if (t == "string" && html) ne.innerHTML = cont;
  else if (t == "object") ne.appendChild(cont);

  return ne;
};

/* get element */
_b.DOM.gE = function (e) {
  var t = typeof(e);
  if (t == "undefined") return 0;
  else if (t == "string") {
    var re = document.getElementById(e);
    if (!re) return 0;
    else if (typeof(re.appendChild) != "undefined") return re;
    else return 0;
  }
  else if (typeof(e.appendChild) != "undefined") return e;
  else return 0;
};

/* remove element */
_b.DOM.remE = function (ele) {
  var e = this.gE(ele);

  if (!e) return 0;
  else if (e.parentNode.removeChild(e)) return true;
  else return 0;
};

/* get position */
_b.DOM.getPos = function (e) {
  var e = this.gE(e);

  var obj = e;

  var curleft = 0;
  if (obj.offsetParent) {
    while (obj.offsetParent) {
      curleft += obj.offsetLeft;
      obj = obj.offsetParent;
    }
  }
  else if (obj.x) curleft += obj.x;

  var obj = e;

  var curtop = 0;
  if (obj.offsetParent) {
    while (obj.offsetParent) {
      curtop += obj.offsetTop;
      obj = obj.offsetParent;
    }
  }
  else if (obj.y) curtop += obj.y;

  return {
    x: curleft,
    y: curtop
  };
};

// FADER PROTOTYPE _____________________________________________

if (typeof(_b.Fader) == "undefined") _b.Fader = {};

_b.Fader = function (ele, from, to, fadetime, callback) {
  if (!ele) return 0;

  this.e = ele;

  this.from = from;
  this.to = to;

  this.cb = callback;

  this.nDur = fadetime;

  this.nInt = 50;
  this.nTime = 0;

  var p = this;
  this.nID = setInterval(function () {
    p._fade()
  },
  this.nInt);
};

_b.Fader.prototype._fade = function () {
  this.nTime += this.nInt;

  var ieop = Math.round(this._tween(this.nTime, this.from, this.to, this.nDur) * 100);
  var op = ieop / 100;

  if (this.e.filters) // internet explorer
  {
    try {
      this.e.filters.item("DXImageTransform.Microsoft.Alpha").opacity = ieop;
    } catch(e) {
      // If it is not set initially, the browser will throw an error.  This will set it if it is not set yet.
      this.e.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=' + ieop + ')';
    }
  }
  else // other browsers
  {
    this.e.style.opacity = op;
  }

  if (this.nTime == this.nDur) {
    clearInterval(this.nID);
    if (this.cb != undefined) this.cb();
  }
};

_b.Fader.prototype._tween = function (t, b, c, d) {
  return b + ((c - b) * (t / d));
};