var COOKIE_EXPIRY_DAYS=15;
var COOKIE_KEYS = ["username", "password", "rememberMe", "market"];
var cookieValues;
/**
*
*  Base64 encode / decode
*  http://www.webtoolkit.info/
*
**/

var Base64 = {

    /* private property*/
    _keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

    /* public method for encoding*/
    encode : function (input) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;

        input = Base64._utf8_encode(input);

        while (i < input.length) {

            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);

            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;

            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if (isNaN(chr3)) {
                enc4 = 64;
            }

            output = output +
            this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
            this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);

        }

        return output;
    },

    /* public method for decoding*/
    decode : function (input) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;

        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

        while (i < input.length) {

            enc1 = this._keyStr.indexOf(input.charAt(i++));
            enc2 = this._keyStr.indexOf(input.charAt(i++));
            enc3 = this._keyStr.indexOf(input.charAt(i++));
            enc4 = this._keyStr.indexOf(input.charAt(i++));

            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;

            output = output + String.fromCharCode(chr1);

            if (enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }

        }

        output = Base64._utf8_decode(output);

        return output;

    },

    /* private method for UTF-8 encoding*/
    _utf8_encode : function (string) {
        string = string.replace(/\r\n/g,"\n");
        var utftext = "";

        for (var n = 0; n < string.length; n++) {

            var c = string.charCodeAt(n);

            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }

        return utftext;
    },

    /* private method for UTF-8 decoding*/
    _utf8_decode : function (utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;

        while ( i < utftext.length ) {

            c = utftext.charCodeAt(i);

            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            }
            else if((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i+1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            }
            else {
                c2 = utftext.charCodeAt(i+1);
                c3 = utftext.charCodeAt(i+2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }

        }

        return string;
    }

}

function hasValue (val)
{
    return (val != null && val != undefined && val != "null" && val != "undefined" &&  (val != "" || String(val) == "0"));
}

/* TODO: this deletes the cookie when called */
function deleteCookie( name, path, domain ) {
    if ( Get_Cookie( name ) ) document.cookie = name + "=" +
    ( ( path ) ? ";path=" + path : "") +
    ( ( domain ) ? ";domain=" + domain : "" ) +
    ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

/* key/value are pair of CSV  */
function createCookie(key, value, expiredays)
{
    var expires = "";
    if (hasValue(expiredays)) {
        var date = new Date();
        date.setTime(date.getTime()+(expiredays*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    document.cookie = key+"="+value+expires+"; path=/";
}
function getLastCookieUser () {
    if (eval(getCookieRememMe()))
        return getCookieUsername ();
    return "";
}

function getCookiePwd () {
    var pwd = getValueFromCookie("password");
    if (hasValue(pwd))
        pwd = Base64.decode(pwd);
    else pwd="";
    return pwd;
}

function getCookieMarket () {
    return getValueFromCookie("market");
}

function getCookieRememMe () {
    return getValueFromCookie("rememberMe");
}

/*
    Obtaining session Id from the cookie
*/
function getCookieUsername ()
{
    var un = getValueFromCookie("username");
    if (hasValue(un))
        un = Base64.decode(un);
    else un="";
    return un;
}

function getValueFromCookie(dataName)
{
    /* Populating cookie values from cookie as it is in CSV format  */
    if (!hasValue(cookieValues)) {
        var val = "";
        var nameEQ = COOKIE_KEYS + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
            var c = ca[i];
            while (c.charAt(0)==' ') c = c.substring(1,c.length);
            if (c.indexOf(nameEQ) == 0) val = c.substring(nameEQ.length,c.length);
        }

        if (hasValue(val)) {
            var values = val.split (",");
            var jsonStr = "[{";
            for(var i=0; i < COOKIE_KEYS.length; i++) {
                jsonStr += "\""+COOKIE_KEYS[i] + "\": \"" + values[i] + "\",";
            }
            jsonStr = jsonStr.substring(0, jsonStr.length-1)+"}]";
            cookieValues=eval(jsonStr);
        }
    }

    try{
        var returnVal = eval("cookieValues[0]."+dataName);
        if (hasValue(returnVal))
            return returnVal;
    } catch (e) {}
    return "";
}