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

    /**
     * The dropdown list layer.
     * @scope private
     */
    this.layer = null;
    
    /** 
     * DummyLayer para calcular la altura de la capa dropdown
     *
     */
    this.dummyLayer = null;
    

    
    /**
     * Suggestion provider for the autosuggest feature.
     * @scope private.
     */
    this.provider /*:SuggestionProvider*/ = oProvider;
    
    /**
     * The textbox to capture.
     * @scope private
     */
    this.textbox /*:HTMLInputElement*/ = oTextbox;
    
    this.iframe = document.getElementById(this.textbox.id+'Iframe');
   
    
    this.textbox.setAttribute("autocomplete", "off");
    
    
    
    this.nodoActual = null;
    
 	this.regExpNumeric = /\d+$/;
    
 	if(document.getElementById(this.textbox.id+'Latitud')!= null){
 		this.inputLatitud = document.getElementById(this.textbox.id+'Latitud');
 	}
    
    if(document.getElementById(this.textbox.id+'Longitud')){
    	this.inputLongitud = document.getElementById(this.textbox.id+'Longitud'); 
    }
  

    this.claveParada = document.getElementById(this.textbox.id+'ClaveParada'); 
    
    
	 /**
     * The textbox to capture.
     * @scope private
     */
    this.regExp /*:HTMLInputElement*/ = null;
    
    //initialize the control
    this.init();
}


AutoSuggestControl.prototype.setCoordenadas = function(aCoordenadas){
	this.coordenadas = aCoordenadas;
}

/**
 * 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. ( UNUSED )
 */
AutoSuggestControl.prototype.autosuggest = function (aSuggestions /*:Array*/,
													 expRegular /*:regular expression*/,
                                                     bTypeAhead /*:boolean*/) {

                                                     
                                                     						 
	// guardamos la expresion regular para poder utilizarla luego a la hora de marcar las opciones de busqueda
	this.regExp = expRegular;
	
    //make sure there's at least one suggestion
    if (aSuggestions.length > 0) {
		//para nuestra aplicacion, typeAhead no se va a utilizar. Siempre hacemos la llamada a autosuggest con el ultimo parametro a false
        if (bTypeAhead) {
           this.typeAhead(aSuggestions[0]);
        }
        
        this.showSuggestions(aSuggestions);
    } else {
        this.hideSuggestions();
    }
};

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

    var oThis = this;
  
    // Capa de ayuda para colocar la dummylayer
    this.helperLayer = document.createElement("div");
    this.helperLayer.className = "helperSuggestions";
    this.helperLayer.style.visibility = "hidden";
    
    //create the layer and assign styles
    this.layer = document.createElement("div");
    this.layer.className = "suggestions";
    //this.layer.style.visibility = "hidden";
	
    
    //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;
        oTarget = oEvent.target || oEvent.srcElement;
        
        if( oTarget.tagName == "STRONG" ){
            oTarget = oTarget.parentNode;
        }

        if (oEvent.type == "mousedown") {
            oThis.textbox.value = oTarget.texto;
            nTarget = oTarget.id;
            oThis.escribeCoordenadas(nTarget);	
            /*
            if(oThis.inputLatitud && oThis.inputLongitud){            	
            	//oThis.escribeCoordenadas(oThis.nodoActual.id);
            	oThis.escribeCoordenadas(nTarget);	
            }
			else{
            	var indiceParada = nTarget.match(this.regExpNumeric);
            	
            }*/
            oThis.hideSuggestions();
        } else if (oEvent.type == "mouseover") {
            oThis.highlightSuggestion(oTarget);
        } else {
            oThis.textbox.focus();
        }
    };
  	this.dummyLayer = document.createElement("div");
	this.dummyLayer.className = "dummyDropDown";
    this.helperLayer.appendChild(this.layer);
    this.helperLayer.appendChild(this.dummyLayer);
    document.body.appendChild(this.helperLayer);
};

AutoSuggestControl.prototype.escribeCoordenadas = function (nTarget) /*:int*/ {
	var indiceParada = nTarget.match(this.regExpNumeric);
	
	// Asignamos los valores de latitud, longitud y clave.
	// Si se utiliza la longitud y latitud...
	if( this.coordenadas[indiceParada] ){
		if(this.inputLatitud){
			this.inputLatitud.value = this.coordenadas[indiceParada][0];	
		}
     	if (this.inputLongitud){
     		this.inputLongitud.value = this.coordenadas[indiceParada][1];        	
     	}        
     	// Si solo nos interesa la clave de la parada...
        this.claveParada.value = this.coordenadas[indiceParada][2];
	}
}

/**
 * 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 && oNode.tagName.toLowerCase() != "body") {
        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 && oNode.tagName.toLowerCase() != "body") {
        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*/) {

	
    switch(oEvent.keyCode) {
        case 38: //up arrow
            this.previousSuggestion();
            this.escribeCoordenadas(this.nodoActual.id);        		
            break;
            
        case 40: //down arrow 
            this.nextSuggestion();
            if( this.nodoActual ){
            	this.escribeCoordenadas(this.nodoActual.id);        		
            }
            break;
            
        case 13: //enter
            if( this.nodoActual ){  
           		this.escribeCoordenadas(this.nodoActual.id);        		
                this.hideSuggestions();       
                
                if (this.enviaForm) {
                    this.enviaForm();
                }
                if (this.onselect){
                	this.onselect();
                }
            }            
            return false;
			break;
    }
    
    return true;
};


/**
 * 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 without typeahead
        this.provider.requestSuggestions(this, false);
    }
};

/**
 * Hides the suggestion dropdown.
 * @scope private
 */
AutoSuggestControl.prototype.hideSuggestions = function () {

	//reiniciamos el cursor inicial!
	this.cur=-1;
	//ocultamos la capa de sugerencias!
	this.helperLayer.style.visibility = "hidden";
	// Si tiene iframe, lo ocultamos
	if(this.iframe != null){
		this.iframe.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"
            this.nodoActual = oNode;
        } 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
        return oThis.handleKeyDown(oEvent);
    };
    
    //assign onblur event handler (hides suggestions)    
    this.textbox.onblur = function () {
        oThis.hideSuggestions();
    };
    
    //create the suggestions dropdown
    this.createDropDown();
};

/**
 * 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.texto; 
    }
};

/**
 * 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.texto;   
    }
};

/**
 * 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;
    var arrMatches = new Array;
    var aSuggestionsFormatted = new Array;
	this.layer.innerHTML = "";  //clear contents of the layer
	
	//document.write('<iframe id="capaParadasDIframe" src="javascript:false;" scrolling="yes" frameborder="0" style="position:absolute; display:block;"></iframe>');
	
	var oThis = this;
    
    for (var i in aSuggestions) {
        oDiv = document.createElement("div");
        oDiv.className = "item";
        oDiv.id = "clave"+i;
        
		//buscamos la expresion regular en el elemento sugerido y lo marcamos con un strong
		arrMatches = aSuggestions[i].match(this.regExp);
		oDiv.texto = aSuggestions[i];
		oDiv.clave = i;
		
		// Guardamos las sugerencias formateadas
		// reemplazamos la expresion regular (value del input) con ese valor entre strongs
		/* replace
		Searches and replaces the regular expression portion (match) with the replaced text instead.

		Note: Also supports the replacement of regular expression with the specified RegExp $1…$9 properties.
		*/
		
		//aSuggestionsFormatted[i] = aSuggestions[i].replace(new RegExp("("+arrMatches[0]+")","gi"), "<strong>$1</strong>");
		aSuggestionsFormatted[i] = aSuggestions[i].replace(new RegExp("("+arrMatches[0]+")","gi"), "<strong>$1</strong>");

		oDiv.innerHTML = aSuggestionsFormatted[i];		
		
		this.layer.appendChild(oDiv);
	}
	
    this.helperLayer.style.left = this.getLeft() + "px";
    this.helperLayer.style.top = (this.getTop()+this.textbox.offsetHeight) + "px";
    
    if(this.iframe != null){
    	this.helperLayer.style.height = "0px";
    	this.helperLayer.style.height = this.iframe.style.height = getOffsetTop(this.dummyLayer)-getOffsetTop(this.helperLayer)+"px";  	
   		/*altoCapa = this.helperLayer.style.height;*/
    	this.iframe.style.display = "block";
    }
    this.helperLayer.style.visibility = "visible";
    
    

};

/**
 * No usada.
 * 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) {

  
    if (this.textbox.createTextRange || this.textbox.setSelectionRange){
        var iLen = this.textbox.value.length; 
        this.textbox.value = sSuggestion; 
        this.selectRange(iLen, sSuggestion.length);
    }
};*/