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package jfxtras.icalendarfx.components;

import java.time.temporal.ChronoUnit;
import java.time.temporal.Temporal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;

import jfxtras.icalendarfx.components.VCommon;
import jfxtras.icalendarfx.components.VFreeBusy;
import jfxtras.icalendarfx.components.VPrimary;
import jfxtras.icalendarfx.components.VTimeZone;
import jfxtras.icalendarfx.properties.component.descriptive.Comment;
import jfxtras.icalendarfx.properties.component.time.DateTimeStart;
import jfxtras.icalendarfx.utilities.DateTimeUtilities;

/**
 * Components with the following properties:
 * COMMENT, DTSTART
 * 
 * @author David Bal
 *
 * @param  - implementation subclass
 * @see VEventNewInt
 * @see VTodoInt
 * @see VJournalInt
 * @see VFreeBusy
 * @see VTimeZone
 */
public abstract class VPrimary extends VCommon
{
    /**
     *  COMMENT: RFC 5545 iCalendar 3.8.1.12. page 83
     * This property specifies non-processing information intended
      to provide a comment to the calendar user.
     * Example:
     * COMMENT:The meeting really needs to include both ourselves
         and the customer. We can't hold this meeting without them.
         As a matter of fact\, the venue for the meeting ought to be at
         their site. - - John
     * */
    public List getComments() { return comments; }
    private List comments;
    public void setComments(List comments)
    {
    	if (this.comments != null)
    	{
    		this.comments.forEach(e -> orderChild(e, null)); // remove old elements
    	}
    	this.comments = comments;
    	if (comments != null)
    	{
    		comments.forEach(c -> orderChild(c)); // order new elements
    	}
	}
    public T withComments(List comments)
    {
    	if (getComments() == null)
    	{
    		setComments(new ArrayList<>());
    	}
    	getComments().addAll(comments);
    	if (comments != null)
    	{
    		comments.forEach(c -> orderChild(c));
    	}
        return (T) this;
    }
    public T withComments(String...comments)
    {
        List list = Arrays.stream(comments)
                .map(c -> Comment.parse(c))
                .collect(Collectors.toList());
        return withComments(list);
    }
    public T withComments(Comment...comments)
    {
    	return withComments(Arrays.asList(comments));
    }
    
    /**
     * DTSTART: Date-Time Start, from RFC 5545 iCalendar 3.8.2.4 page 97
     * Start date/time of repeat rule.  Used as a starting point for making the Stream of valid
     * start date/times of the repeating events.
     * Can contain either a LocalDate (DATE) or LocalDateTime (DATE-TIME)
     */
    // hook to be overridden in subclasses
    @Deprecated // is this needed?
    void dateTimeStartListenerHook() { }
    
    public DateTimeStart getDateTimeStart() { return dateTimeStart; }
    private DateTimeStart dateTimeStart;
    public void setDateTimeStart(DateTimeStart dateTimeStart)
    {
    	orderChild(this.dateTimeStart, dateTimeStart);
    	this.dateTimeStart = dateTimeStart;
	}
    public void setDateTimeStart(String dateTimeStart) { setDateTimeStart(DateTimeStart.parse(dateTimeStart)); }
    public void setDateTimeStart(Temporal temporal) { setDateTimeStart(new DateTimeStart(temporal)); }
    public T withDateTimeStart(DateTimeStart dateTimeStart)
    {
        setDateTimeStart(dateTimeStart);
        return (T) this;
    }
    public T withDateTimeStart(String dateTimeStart)
    {
        setDateTimeStart(dateTimeStart);
        return (T) this;
    }
    public T withDateTimeStart(Temporal dateTimeStart)
    {
        setDateTimeStart(dateTimeStart);
        return (T) this;
    }
    
    /** Component is whole day if dateTimeStart (DTSTART) only contains a date (no time) */
    public boolean isWholeDay()
    {
        return ! getDateTimeStart().getValue().isSupported(ChronoUnit.NANOS);
    }
    
    /*
     * CONSTRUCTORS
     */
    VPrimary() { super(); }

    public VPrimary(VPrimary source)
    {
        super(source);
    }
    
    /**
     * Sorts VComponents by DTSTART date/time
     */
    public final static Comparator> DTSTART_COMPARATOR = (v1, v2) -> 
    {
        Temporal t1 = v1.getDateTimeStart().getValue();
        Temporal t2 = v2.getDateTimeStart().getValue();
        return DateTimeUtilities.TEMPORAL_COMPARATOR2.compare(t1, t2);
    };
}