/**
 * @author ajubert
 */
var Cookie = {
    data: {},
    options: {
        expires: 1,
        domain: "",
        path: "",
        secure: false
    },
    
    init: function(options, data){
        Cookie.options = Object.extend(Cookie.options, options ||
        {});
        
        var payload = Cookie.retrieve();
        if (payload) {
            Cookie.data = payload.evalJSON();
        }
        else {
            Cookie.data = data ||
            {};
        }
        Cookie.store();
    },
    getData: function(key){
        return Cookie.data[key];
    },
    setData: function(key, value){
        Cookie.data[key] = value;
        Cookie.store();
    },
    removeData: function(key){
        delete Cookie.data[key];
        Cookie.store();
    },
    retrieve: function(){
        var start = document.cookie.indexOf(Cookie.options.name + "=");
        
        if (start == -1) {
            return null;
        }
        if (Cookie.options.name != document.cookie.substr(start, Cookie.options.name.length)) {
            return null;
        }
        
        var len = start + Cookie.options.name.length + 1;
        var end = document.cookie.indexOf(';', len);
        
        if (end == -1) {
            end = document.cookie.length;
        }
        return unescape(document.cookie.substring(len, end));
    },
    store: function(){
        var expires = '';
        
        if (Cookie.options.expires) {
            var today = new Date();
            expires = Cookie.options.expires * 86400000;
            expires = ';expires=' + new Date(today.getTime() + expires);
        }
        
        document.cookie = Cookie.options.name + '=' + escape(Object.toJSON(Cookie.data)) + Cookie.getOptions() + expires;
    },
    erase: function(){
        document.cookie = Cookie.options.name + '=' + Cookie.getOptions() + ';expires=Thu, 01-Jan-1970 00:00:01 GMT';
    },
    getOptions: function(){
        return (Cookie.options.path ? ';path=' + Cookie.options.path : '') + (Cookie.options.domain ? ';domain=' + Cookie.options.domain : '') + (Cookie.options.secure ? ';secure' : '');
    }
};