/**
 * An autosuggest textbox control.
 * @class
 * @scope public
 */

function AutoSuggestControl(oTextbox /*:HTMLInputElement*/,
                            oRegion,
                            oProvider /*:SuggestionProvider*/) {

    this.cur /*:int*/ = -1;
    this.layer = null;
    this.region = oRegion;
    this.provider /*:SuggestionProvider*/ = oProvider;
    this.textbox /*:HTMLInputElement*/ = oTextbox;
    this.timeoutId /*:int*/ = null;
    this.userText /*:String*/ = oTextbox.value;
    this.userRegion /*:String*/ = oRegion.value;
    this.init();
}

AutoSuggestControl.prototype.autosuggest = function (aSuggestions /*:Array*/,
                                                     bTypeAhead /*:boolean*/) {
    this.cur = -1;
    if (aSuggestions.length > 0) {
        if (bTypeAhead) {
           this.typeAhead(aSuggestions[0]);
        }
        this.showSuggestions(aSuggestions);
    } else {
        this.hideSuggestions();
    }
};

AutoSuggestControl.prototype.createDropDown = function () {

    this.layer = document.createElement("div");
    this.layer.className = "suggestions";
    this.layer.style.display = "none";
    //this.layer.style.width = this.textbox.offsetWidth;
    this.layer = document.body.appendChild(this.layer);

    var oThis = this;
    this.layer.onmousedown = 
    this.layer.onmouseup = 
    this.layer.onmouseover = function (oEvent) {
        oEvent = oEvent || window.event;
        oTarget = oEvent.target || oEvent.srcElement;

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

AutoSuggestControl.prototype.getLeft = function () /*:int*/ {

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

    while(oNode.tagName != "BODY") {
        iLeft += oNode.offsetLeft;
        oNode = oNode.offsetParent;        
    }

    return iLeft;
};

AutoSuggestControl.prototype.getTop = function () /*:int*/ {

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

    while(oNode.tagName != "BODY") {
        iTop += oNode.offsetTop;
        oNode = oNode.offsetParent;
    }

    return iTop;
};

AutoSuggestControl.prototype.goToSuggestion = function (iDiff /*:int*/) {
    var cSuggestionNodes = this.layer.childNodes;

    if (cSuggestionNodes.length > 0) {
        var oNode = null;

        if (iDiff > 0) {
            if (this.cur < cSuggestionNodes.length-1) {
                oNode = cSuggestionNodes[++this.cur];
            }
        } else {
            if (this.cur > 0) {
                oNode = cSuggestionNodes[--this.cur];
            }
        }

        if (oNode) {
            this.highlightSuggestion(oNode);
            this.textbox.value = oNode.firstChild.nodeValue;
        }
    }
};

AutoSuggestControl.prototype.handleKeyDown = function (oEvent /*:Event*/) {

    switch(oEvent.keyCode) {
        case 38: //up arrow
            this.goToSuggestion(-1);
            break;
        case 40: //down arrow 
            this.goToSuggestion(1);
            break;
        case 27: //esc
            //this.textbox.value = this.userText;
            this.selectRange(this.userText.length, 0);
            //добавлено ручками
            /* falls through */
        case 13: //enter
            this.hideSuggestions();
            oEvent.returnValue = false;
            if (oEvent.preventDefault) {
                oEvent.preventDefault();
            }
            break;
    }

};

AutoSuggestControl.prototype.handleKeyUp = function (oEvent /*:Event*/) {

    var iKeyCode = oEvent.keyCode;
    var oThis = this;

    //get the currently entered text
    this.userText = this.textbox.value;

    clearTimeout(this.timeoutId);

    //for backspace (8) and delete (46), shows suggestions without typeahead
    if (iKeyCode == 8 || iKeyCode == 46) {

        this.timeoutId = setTimeout( function () {
            oThis.provider.requestSuggestions(oThis, false);
        }, 250);
        
    //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.timeoutId = setTimeout( function () {
            oThis.provider.requestSuggestions(oThis, true);
        }, 250);
    }
};


AutoSuggestControl.prototype.handleOnClick = function (oEvent /*:Event*/) {
    var oThis = this;
    //Выводим все города текущей области
    this.userText = 'ALL';

    clearTimeout(this.timeoutId);
        this.timeoutId = setTimeout( function () {
            oThis.provider.requestSuggestions(oThis, false);
        }, 250);
};

AutoSuggestControl.prototype.hideSuggestions = function () {
    this.layer.style.display = "none";
        if (document.getElementById('select-free')) {
              document.getElementById('select-free').style.display='none';
           }
};

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"
            
            mt_onmouseoverdiv(); //ФИКС ИЕ для того что бы не закрывался слой с городами 
        } else if (oNode.className == "current") {
            oNode.className = "";
        }
    }
};

AutoSuggestControl.prototype.init = function () {

    var oThis = this;

    this.textbox.onkeyup = function (oEvent) {

        if (!oEvent) {
            oEvent = window.event;
        }
        oThis.handleKeyUp(oEvent);
    };

    this.textbox.onclick = function (oEvent) {
        if (!oEvent) {
            oEvent = window.event;
        }    
        oThis.handleOnClick(oEvent);
    };

    this.textbox.onkeydown = function (oEvent) {

        if (!oEvent) {
            oEvent = window.event;
        }    

        oThis.handleKeyDown(oEvent);
    };

    this.textbox.onblur = function () {
        oThis.hideSuggestions();
    };

    this.createDropDown();
};

AutoSuggestControl.prototype.selectRange = function (iStart /*:int*/, iEnd /*:int*/) {

    if (this.textbox.createTextRange) {
        var oRange = this.textbox.createTextRange();
        oRange.moveStart("character", iStart);
        oRange.moveEnd("character", iEnd - this.textbox.value.length);
        oRange.select();
        
    //use setSelectionRange() for Mozilla
    } else if (this.textbox.setSelectionRange) {
        this.textbox.setSelectionRange(iStart, iEnd);
    }     

    this.textbox.focus();
};

AutoSuggestControl.prototype.showSuggestions = function (aSuggestions /*:Array*/) {

    var oDiv = null;

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

    mt_onmouseoverdiv();

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

    this.layer.style.left = this.getLeft() + "px";
    this.layer.style.top = (this.getTop()+this.textbox.offsetHeight) + "px";
    this.layer.style.display = "block";
};

AutoSuggestControl.prototype.typeAhead = function (sSuggestion /*:String*/) {

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

/**
 * Provides suggestions for state/province names.
 * @class
 * @scope public
 */
function SuggestionProvider() {
    this.http = zXmlHttp.createRequest();
}

SuggestionProvider.prototype.requestSuggestions = function (oAutoSuggestControl /*:AutoSuggestControl*/,
                                                            bTypeAhead /*:boolean*/) {

    var oHttp = this.http;
                                   
    if (oHttp.readyState != 0) {
        oHttp.abort();
    }                 

    var oData = {
        requesting: "city_region",
        obl: oAutoSuggestControl.userRegion,
        text: oAutoSuggestControl.userText,
        limit: 10
    }

    if (oAutoSuggestControl.userRegion < 0) {
		oHttp.open("post", "/suggestions2.php", true);
	} else {
		oHttp.open("post", "/suggestions.php", true);
	}
    oHttp.onreadystatechange = function () {
        if (oHttp.readyState == 4) {
            //evaluate the returned text JavaScript (an array)
            //alert(oHttp.responseText);
            var aSuggestions = JSON.parse(oHttp.responseText);
            if (document.getElementById('select-free')) {
              document.getElementById('select-free').style.display='block';
              //document.getElementById('selOptionCabinet').style.display='none';
            }
            //provide suggestions to the control
            oAutoSuggestControl.autosuggest(aSuggestions, bTypeAhead);
        }
    };
    oHttp.send(JSON.stringify(oData));
};