var Url_Manager = function(params){   
    this.params = params;
}

Url_Manager.prototype.refresh = function() {
    location.href = this.getUrl();
}

Url_Manager.prototype.getParams = function() {
    var keys = Object.keys(this.params);
    var params = {};
    for(var i=0;i<keys.length;i++){
        if($.trim(this.params[keys[i]]) != ''){
            var loadParam = true;
            switch (keys[i]){
                case 'pageNo':
                    if(this.params['pageNo'] == 1)
                        loadParam = false;
                    break;
                case 'onPage':
                    if(this.params['onPage'] == 15)
                        loadParam = false;
                    break;
                case 'sidx':
                    if(this.params['sidx'] == 'date')
                        loadParam = false;
                    break;
                case 'sord':
                    if(this.params['sord'] == 'desc')
                        loadParam = false;
                    break;
            }
            if(loadParam)
                params[keys[i]] = this.params[keys[i]];
        }
    }

    return params;
}

Url_Manager.prototype.changeParam = function(paramName, paramValue) {
    
    switch (paramName){
        case 'year':
            this.params['month'] = '';
            this.params['fromDate'] = '';
            this.params['toDate'] = '';
        break;
        case 'type':
            this.params['fromDate'] = '';
            this.params['toDate'] = '';

            var currentTime = new Date();
            var month = currentTime.getMonth() + 1;
            var year = currentTime.getFullYear()

            if( this.params['year'] == '')
                this.params['year'] = year;

            
            switch (paramValue){
                case 'yearly':
                    this.params['month'] = '';
                    break;
                case 'monthly':
                    if( this.params['month'] == '')
                        this.params['month'] = (this.params['year'] == year) ? month : 1;
                    break;
                case 'monthly2':
                    if( this.params['month'] == '')
                        this.params['month'] = (this.params['year'] == year) ? month : 1;
                    break;
                case 'weekly':
                    if( this.params['month'] == '')
                        this.params['month'] = (this.params['year'] == year) ? month : 1;
                    break;
            }
        break;
        case 'month':
            if(paramValue > 12){
                paramValue = 1;
                this.params['year']++;    
            }else{
                if(paramValue < 1){
                   paramValue = 12;
                   this.params['year']--;    
                }   
            }
            this.params['fromDate'] = '';
            this.params['toDate'] = '';
        break;
        case 'fromDate':
            if(this.params['type'] == 'weekly'){
                this.params['year'] = '';    
                this.params['month'] = '';    
                this.params['toDate'] = '';
            }

        break;
    }
    
    if(paramName != 'pageNo')
        this.params['pageNo'] = '';
    
    this.params[paramName] = paramValue;
}


Url_Manager.prototype.gotoPage = function(page) {
    var self = this;
    self.changeParam('pageNo',page);
    self.refresh();
}


Url_Manager.prototype.changeItemsPerPage = function(itemsPerPage){
    var self = this;
    self.changeParam('onPage',itemsPerPage);
    self.changeParam('pageNo',1);
    self.refresh();
};


Url_Manager.prototype.getUrl = function() {
    var params = this.getParams();
    var url = "/app/event/index?"+$.param(params);
    if(this.params['fromDate'] == this.params['toDate'] && this.params['toDate'] != '')
        url += "#events-list";
    return  url;
}

Url_Manager.prototype.getParamValue = function(key) {
    return  this.params[key];
}