var tmpobj;
var TypeAHeadTimeOut;

/**
 * An autosuggest textbox control.
 * @class
 * @scope public
 */
function AutoSuggestControl(oTextbox /*:HTMLInputElement*/,
                            oProvider /*:SuggestionProvider*/) {
    if (!oTextbox || !oProvider) {
        return;
    }
    
    /**
     * The currently selected suggestions.
     * @scope private
     */
    this.cur /*:int*/ = -1;

    /**
     * The dropdown list layer.
     * @scope private
     */
    this.layer = null;

    /**
     * Suggestion provider for the autosuggest feature.
     * @scope private.
     */
    this.provider /*:SuggestionProvider*/ = oProvider;

    /**
     * The textbox to capture.
     * @scope private
     */
    this.textbox /*:HTMLInputElement*/ = oTextbox;

    this.textbox.autocomplete='off';
    this.textbox.setAttribute('autocomplete', 'off');

    //initialize the control
    this.init();

}

/**
 * Autosuggests one or more suggestions for what the user has typed.
 * If no suggestions are passed in, then no autosuggest occurs.
 * @scope private
 * @param aSuggestions An array of suggestion strings.
 * @param bTypeAhead If the control should provide a type ahead suggestion.
 */
AutoSuggestControl.prototype.autosuggest = function (aSuggestions /*:Array*/,
                                                     bTypeAhead /*:boolean*/) {

    //make sure there's at least one suggestion
    if (aSuggestions.length > 0) {
        if (aSuggestions.length == 1 && bTypeAhead) {
	   tmpobj = this;
           TypeAHeadTimeOut = setTimeout('tmpobj.typeAhead(\'' + aSuggestions[0] + '\');', 1000);
        }

        this.showSuggestions(aSuggestions);
    } else {
        this.hideSuggestions();
    }
};

/**
 * Creates the dropdown layer to display multiple suggestions.
 * @scope private
 */
AutoSuggestControl.prototype.createDropDown = function () {

    var oThis = this;

    //create the layer and assign styles
    this.layer = document.createElement("div");
    this.layer.className = "suggestions";
    this.layer.style.display = "none";
    if (!document.all)
        this.layer.style.width = parseInt(this.textbox.offsetWidth) + 'px';


    //when the user clicks on the a suggestion, get the text (innerHTML)
    //and place it into a textbox
    this.layer.onmousedown =
    this.layer.onmouseup =
    this.layer.onmouseover = function (oEvent) {
        oEvent = oEvent || window.event;
        var oTarget = oEvent.target || oEvent.srcElement;

        if (oEvent.type == "mousedown") {
            if(oTarget.firstChild.nodeValue != null)
		    oThis.textbox.value = oTarget.firstChild.nodeValue;
            oThis.hideSuggestions();
        } else if (oEvent.type == "mouseover") {
            oThis.highlightSuggestion(oTarget);
        } else {
            oThis.textbox.focus();
        }
    };


    document.body.appendChild(this.layer);
};

/**
 * Gets the left coordinate of the textbox.
 * @scope private
 * @return The left coordinate of the textbox in pixels.
 */
AutoSuggestControl.prototype.getLeft = function () /*:int*/ {

    var oNode = this.textbox;
    var iLeft = 0;

    while (oNode.offsetParent) {
        iLeft += oNode.offsetLeft;
        oNode = oNode.offsetParent;
    }

    return iLeft;
};

/**
 * Gets the top coordinate of the textbox.
 * @scope private
 * @return The top coordinate of the textbox in pixels.
 */
AutoSuggestControl.prototype.getTop = function () /*:int*/ {

    var oNode = this.textbox;
    var iTop = 0;

    while (oNode.offsetParent) {
        iTop += oNode.offsetTop;
        oNode = oNode.offsetParent;
    }

    return iTop;
};

/**
 * Handles three keydown events.
 * @scope private
 * @param oEvent The event object for the keydown event.
 */
AutoSuggestControl.prototype.handleKeyDown = function (oEvent /*:Event*/) {
    clearTimeout(TypeAHeadTimeOut);
    switch(oEvent.keyCode) {
        case 38: //up arrow
            this.previousSuggestion();
            break;
        case 40: //down arrow
            this.nextSuggestion();
            break;
        case 27: // esc
        case 13: //enter
            this.hideSuggestions();
            break;
//	case 9: // tab <= Problème avec les pseudos qui ne sont pas encore dans la base.
        case 39: // right
            this.typeSuggestion();
	    break;
    }

};

/**
 * Handles keyup events.
 * @scope private
 * @param oEvent The event object for the keyup event.
 */
AutoSuggestControl.prototype.handleKeyUp = function (oEvent /*:Event*/) {

    var iKeyCode = oEvent.keyCode;

    //for backspace (8) and delete (46), shows suggestions without typeahead
    if (iKeyCode == 8 || iKeyCode == 46) {
        this.provider.requestSuggestions(this, false);

    //make sure not to interfere with non-character keys
    } else if (iKeyCode < 32 || (iKeyCode >= 33 && iKeyCode < 46) || (iKeyCode >= 112 && iKeyCode <= 123)) {
        //ignore
    } else {
        //request suggestions from the suggestion provider with typeahead
        this.provider.requestSuggestions(this, true);
    }
};

/**
 * Hides the suggestion dropdown.
 * @scope private
 */
AutoSuggestControl.prototype.hideSuggestions = function () {
    this.layer.style.display = "none";
};

/**
 * Highlights the given node in the suggestions dropdown.
 * @scope private
 * @param oSuggestionNode The node representing a suggestion in the dropdown.
 */
AutoSuggestControl.prototype.highlightSuggestion = function (oSuggestionNode) {

    for (var i=0; i < this.layer.childNodes.length; i++) {
        var oNode = this.layer.childNodes[i];
        if (oNode == oSuggestionNode) {
            oNode.className = "current"
        } else if (oNode.className == "current") {
            oNode.className = "";
        }
    }
};

/**
 * Initializes the textbox with event handlers for
 * auto suggest functionality.
 * @scope private
 */
AutoSuggestControl.prototype.init = function () {

    //save a reference to this object
    var oThis = this;

    //assign the onkeyup event handler
    this.textbox.onkeyup = function (oEvent) {

        //check for the proper location of the event object
        if (!oEvent) {
            oEvent = window.event;
        }

        //call the handleKeyUp() method with the event object
        oThis.handleKeyUp(oEvent);
    };

    //assign onkeydown event handler
    this.textbox.onkeydown = function (oEvent) {

        //check for the proper location of the event object
        if (!oEvent) {
            oEvent = window.event;
        }

        //call the handleKeyDown() method with the event object
        oThis.handleKeyDown(oEvent);
    };
    if (!document.all)
    {
        this.textbox.onkeypress = this.textbox.onkeydown;
        this.textbox.onkeydown = null;
    }

    //assign onblur event handler (hides suggestions)
    this.textbox.onblur = function () {
        oThis.hideSuggestions();
    };

    //create the suggestions dropdown
    this.createDropDown();
};

/**
 * Type in the textbox the current suggestion in the dropdown and
 * places the suggestion into the textbox.
 * @scope private
 */
AutoSuggestControl.prototype.typeSuggestion = function () {
    var cSuggestionNodes = this.layer.childNodes;

    if (cSuggestionNodes.length > 0 && this.cur < cSuggestionNodes.length)
    {
        var oNode = cSuggestionNodes[this.cur + 1];

        this.textbox.value += oNode.firstChild.nodeValue.substr(this.textbox.value.length, oNode.firstChild.nodeValue.length);
    }
};


/**
 * Highlights the next suggestion in the dropdown and
 * places the suggestion into the textbox.
 * @scope private
 */
AutoSuggestControl.prototype.nextSuggestion = function () {
    var cSuggestionNodes = this.layer.childNodes;

    if (cSuggestionNodes.length > 0 && this.cur < cSuggestionNodes.length-1) {
        var oNode = cSuggestionNodes[++this.cur];
        this.highlightSuggestion(oNode);
        this.textbox.value = oNode.firstChild.nodeValue;
    }
};

/**
 * Highlights the previous suggestion in the dropdown and
 * places the suggestion into the textbox.
 * @scope private
 */
AutoSuggestControl.prototype.previousSuggestion = function () {
    var cSuggestionNodes = this.layer.childNodes;

    if (cSuggestionNodes.length > 0 && this.cur > 0) {
        var oNode = cSuggestionNodes[--this.cur];
        this.highlightSuggestion(oNode);
        this.textbox.value = oNode.firstChild.nodeValue;
    }
};

/**
 * Selects a range of text in the textbox.
 * @scope public
 * @param iStart The start index (base 0) of the selection.
 * @param iLength The number of characters to select.
 */
AutoSuggestControl.prototype.selectRange = function (iStart /*:int*/, iLength /*:int*/) {

    //use text ranges for Internet Explorer
    if (this.textbox.createTextRange) {
        var oRange = this.textbox.createTextRange();
        oRange.moveStart("character", iStart);
        oRange.moveEnd("character", iLength - this.textbox.value.length);
        oRange.select();

    //use setSelectionRange() for Mozilla
    } else if (this.textbox.setSelectionRange) {
        this.textbox.setSelectionRange(iStart, iLength);
    }

    //set focus back to the textbox
    this.textbox.focus();
};

/**
 * Builds the suggestion layer contents, moves it into position,
 * and displays the layer.
 * @scope private
 * @param aSuggestions An array of suggestions for the control.
 */
AutoSuggestControl.prototype.showSuggestions = function (aSuggestions /*:Array*/) {

    var oDiv = null;
    this.layer.innerHTML = "";  //clear contents of the layer

    for (var i=0; i < aSuggestions.length; i++) {
        oDiv = document.createElement("div");
        oDiv.appendChild(document.createTextNode(aSuggestions[i]));
        this.layer.appendChild(oDiv);
    }

    if (document.all)
    {
        // IE ne sait pas bien compter les bordures, on a besoin de bidouiller de 2px du coup.
        this.layer.style.left = this.getLeft() + 2 + "px";
    }
    else
        this.layer.style.left = this.getLeft() + "px";

    this.layer.style.top = (this.getTop() + this.textbox.offsetHeight - 1) + "px";
    this.layer.style.display = "block";

};

/**
 * Inserts a suggestion into the textbox, highlighting the
 * suggested part of the text.
 * @scope private
 * @param sSuggestion The suggestion for the textbox.
 */
AutoSuggestControl.prototype.typeAhead = function (sSuggestion /*:String*/) {

    //check for support of typeahead functionality
    if (this.textbox.createTextRange || this.textbox.setSelectionRange){
        var iLen = this.textbox.value.length;
        this.textbox.value += sSuggestion.substr(iLen,sSuggestion.length);
//        this.selectRange(iLen, sSuggestion.length);
	tmpobj = null;
    }
};

/**
 * Simple Dummy Cache for suggestions.
 * @class
 * @scope public
 */
function SimpleDummyCache(str)
{
	this.str = str;
	this.results = new Array();
}

SimpleDummyCache.prototype.toString = function()
{
	return this.str + ' -> \n{' + this.results + '}\n';
}

/**
 * Provides suggestions.
 * @class
 * @scope public
 */
function RemoteStateSuggestions()
{
	this.cache_blog = new Array();
	this.cache_profil = new Array();

	if (typeof XMLHttpRequest != 'undefined')
		this.http = new XMLHttpRequest();
	else if (typeof ActiveXObject != 'undefined')
		this.http = new ActiveXObject('MSXML2.XmlHttp');
	else
		this.http = false;
}

/**
 * Request suggestions for the given autosuggest control.
 * @scope protected
 * @param oAutoSuggestControl The autosuggest control to provide suggestions for.
 */

var CurOAutoSuggestControl;
var CurRemoteStateSuggestions;
var CurbTypeAhead;
var Curstrsearch;
var tempo;

function effectiveRequestSuggestions()
{

	var oHttp  = CurRemoteStateSuggestions.http;
	var sURL;
	var str = Curstrsearch;

	if(typeof searchtype == 'undefined' || (searchtype != 'blog' && searchtype != 'profil'))
		return false;

	sURL = '/recherche/autocomplete.php?n=' + encodeURIComponent(str);
  if ( searchtype == 'profil' )
  {
	  sURL = sURL + '&code_search=profil';
	  var oCache = CurRemoteStateSuggestions.cache_profil;
  }
  if ( searchtype == 'blog' )
  {
    var oCache = CurRemoteStateSuggestions.cache_blog;
  }
	
  var len    = oCache.length;

	len = 0;
	// open connection to autocomplete results from the web
	oHttp.open('get', sURL , true);

	oHttp.onreadystatechange = function ()
	{
		if (oHttp.readyState == 4)
		{
			var tbl = new Array();

			try
			{
				var res = oHttp.responseXML.documentElement;
				len = res.childNodes.length;

				for (var i = 0; i < len; i++)
				{
          if(res.childNodes[i].nodeName.toLowerCase() == 'n')
          {
  					tbl[i] = res.childNodes[i].firstChild.nodeValue;
          }
					/* faire ici ce qu'on veut des résultats */
				}
			}
			catch (e) { }

			if (tbl.length)
			{
				// create a SimpleDummyCache and add it at the end of our cache Array
				var co  = new SimpleDummyCache(str);
				co.results = tbl;
				oCache.push(co);

				// remove the oldest SimpleDummyCache in our cache Array if necessary
				// to keep our cache small
				if (oCache.length > 42)
					oCache.shift();
			}

			// provide suggestions to the control
			CurOAutoSuggestControl.autosuggest(tbl, CurbTypeAhead);
		}
	};
	oHttp.send(null);

}

RemoteStateSuggestions.prototype.requestSuggestions = function (oAutoSuggestControl /*:AutoSuggestControl*/,
                                                          bTypeAhead /*:boolean*/)
{
	window.clearTimeout(tempo);

	var oHttp  = this.http;
	var sURL;

	if (!oHttp || oAutoSuggestControl.textbox.value.length < 3 || typeof searchtype == 'undefined' || (searchtype != 'blog' && searchtype != 'profil'))
	{
		oAutoSuggestControl.autosuggest(Array(), bTypeAhead);
		return false;
	}
	
  if ( searchtype == 'blog' )
    var oCache = this.cache_blog;
  if ( searchtype == 'profil' )
    var oCache = this.cache_profil;
	var len    = oCache.length;

	// if there is already a live request, cancel it
	if (oHttp.readyState != 0)
		oHttp.abort();

	// build the URL
	var str = encodeURIComponent(oAutoSuggestControl.textbox.value);

	for (var i = 0; i < len; i++)
	{
		if (oCache[i].str == str)
		{
			oAutoSuggestControl.autosuggest(oCache[i].results, bTypeAhead);
			return true;
		}
	}

	CurRemoteStateSuggestions = this;
	CurOAutoSuggestControl = oAutoSuggestControl;
	CurbTypeAhead = bTypeAhead;
	Curstrsearch = str;

	tempo = window.setTimeout('effectiveRequestSuggestions();', 300);
	return true;
}