scal.addMethods({
    /*------------------------------- INTERNAL -------------------------------*/
    _setupPlanner: function(planner) {
        var splanner = {};
        planner.each(function(plan) {
            var planclass = plan.cls ? plan.cls : 'dayboxevent';
            if (Object.isString(plan.period)) {
                var planDate = new Date(plan.period);
                splanner[planDate] = { cls: planclass, val: plan.label };
            } else {
                plan.period.each(function(d) {
                    splanner[d] = { cls: planclass, val: plan.label };
                });
            }
        });
        return splanner;
    },
    _updatePlanner: function(day, cell, el) {
        if (this.planner[day]) {
            cell.addClassName('hasEvent');
            var planclass = this.planner[day].cls ? this.planner[day].cls + ' dayboxevent' : 'dayboxevent';
            if (typeof (this.planner[day].val) == 'array') {
                this.planner[day].val.each(function(plan) {
                    el.insert(new Element('p', { 'class': planclass }).update(plan));
                });
            }
        }
    },
    _setPlanner: function(planclasses, planvalues, plannerdate) {
        if (this.planner[plannerdate]) {
            this.planner[plannerdate].val.push(planvalues.join(','));
            if (arguments[3] && (!this.planner[plannerdate].cls.include(arguments[3]))) {
                this.planner[plannerdate].cls += ' ' + arguments[3];
            }
        } else {
            this.planner[plannerdate] = { cls: planclasses, val: planvalues };
        }
    },
    _compareMonthYear: function(date1, date2) {
        return Object.isUndefined(['getMonth', 'getFullYear'].find(function(n) { return date1[n]() != date2[n](); }));
    },
    /*------------------------------- PUBLIC -------------------------------*/
    getEvents: function() {
        return this.planner;
    },
    getDatesByEvent: function(evt) {
        var dates = [];
        for (var d in this.planner) {
            var eindex = this.planner[d].val.indexOf(evt);
            if (eindex >= 0) { dates.push(new Date(d)); }
        }
        return dates;
    },
    getEventsByDate: function(d) {
        return this.planner[d] ? this.planner[d].val : false;
    },
    getCurrentEvents: function() {
        // determine if we want just the current month or everything in current calendar view
        var currentMonth = arguments[0] ? this.currentdate.getMonth() : false;
        var plannerCheck = function(d) {
            if (currentMonth) { return this.planner[d] && (d.getMonth() == currentMonth) ? true : false; }
            else { return this.planner[d] ? true : false; }
        } .bind(this);
        var evts = [];
        this.dateRange.each(function(d, i) {
            if (plannerCheck(d)) {
                evts.push({ dt: d, target: this.cells[i] });
            }
        } .bind(this));
        return evts;
    },
    removeEventsByDate: function(d) {
        if (this.planner[d]) {
            var cellIndex = this._getCellIndexByDate(d);
            if (Object.isNumber(arguments[1])) {
                var index = arguments[1];
                this.planner[d].val = this.planner[d].val.without(index);
                this.cells[cellIndex].select('.dayboxvalue p')[index].remove();
            } else {
                delete this.planner[d];
                this.cells[cellIndex].select('.dayboxvalue p').invoke('remove');
                this.cells[cellIndex].removeClassName('hasEvent');
            }
        } else {
            return false;
        }
    },
    getEventElementsByDate: function(d) {
        return this.getElementByDate(d).select('p.dayboxevent');
    },
    getEventElementsByWeek: function(week) {
        return this.getElementsByWeek(week).collect(function(e) { return e.select('p.dayboxevent'); });
    },
    getSelectedEvents: function() {
        return this.getSelectedElement().select('p.dayboxevent');
    },
    getTodaysEvents: function() {
        return this.getTodaysElement().select('p.dayboxevent');
    },
    updateDayValue: function(week, day, value) {
        var planclasses = 'dayboxevent';
        if (arguments[3]) { planclasses += ' ' + arguments[3]; }
        var planvalues = Object.isArray(value) ? value : [value];
        week -= 1;
        day -= 1;
        this.dateRange.eachSlice(7, function(wk, i) {
            if (i == week) {
                this._setPlanner(planclasses, planvalues, wk[day], arguments[3]);
                throw $break
            }
        } .bind(this));
        var cellvalue = '.cal_day_' + week + '_' + day + '_value';
        var el = this.element.select(cellvalue)[0];
        planvalues.each(function(val) {
            el.insert(new Element('p', { 'class': planclasses }).update(value));
        });
        return el;
    },
    setPlannerValue: function(plannerdate, value) {
        var planclasses = 'dayboxevent';
        if (arguments[4]) { planclasses += ' ' + arguments[4]; }
        var planvalues = Object.isArray(value) ? value : [value];
        this._setPlanner(planclasses, planvalues, plannerdate, arguments[4]);
        if (!this._compareMonthYear(this.currentdate, plannerdate)) {
            return; // return nothing if plannerdate isn't in the current month
        }
        var cellIndex = this._getCellIndexByDate(plannerdate);
        var el = this.cells[cellIndex].select('.dayboxvalue')[0];
        this.cells[cellIndex].addClassName('hasEvent');
        planvalues.each(function(val) {
            el.insert(new Element('p', { 'class': planclasses }).update(val));
        });
        return el;
    }
});