package ical

import (
	"time"
)

type CalendarEvent struct {
	Id string
	Summary string
	Description string
	Location string
	CreatedAtUTC *time.Time
	ModifiedAtUTC *time.Time
	StartAt *time.Time
	EndAt *time.Time
}

func (this *CalendarEvent) StartAtUTC() *time.Time {
	return inUTC(this.StartAt)
}

func (this *CalendarEvent) EndAtUTC() *time.Time {
	return inUTC(this.EndAt)
}

func (this *CalendarEvent) Serialize() string {
	buffer := new(strBuffer)
	return this.serializeWithBuffer(buffer)
}

func (this *CalendarEvent) ToICS() string {
	return this.Serialize()
}

func (this *CalendarEvent) serializeWithBuffer(buffer *strBuffer) string {
	serializer := calEventSerializer{
		event: this,
		buffer: buffer,
	}
	return serializer.serialize()
}

func inUTC(t *time.Time) *time.Time {
	if t == nil {
		return nil
	}

	tUTC := t.UTC()
	return &tUTC
}