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package Torello.HTML.NodeSearch.searchLoops;

import java.util.Vector;
import java.util.function.Predicate;
import java.util.stream.IntStream;

import Torello.HTML.*;
import Torello.Java.LV;

public class CmtNRemove
{
    public static int nth (Vector<? extends HTMLNode> html, int nth, LV l, Predicate<String> p)
    {
        HTMLNode n;     CommentNode cn;
        for (int i=l.start; i < l.end; i++)
            if (    ((n = html.elementAt(i)).isCommentNode())       
                &&  p.test(((CommentNode) n).body)
                &&  (--nth == 0)
                )
                { html.removeElementAt(i); return 1; }
        return 0;
    }

    public static int nthFromEnd (Vector<? extends HTMLNode> html, int nth, LV l, Predicate<String> p)
    {
        HTMLNode n;     CommentNode cn;
        for (int i=l.end-1; i >= l.start; i--)
            if (    ((n = html.elementAt(i)).isCommentNode())       
                &&  p.test(((CommentNode) n).body)
                &&  (--nth == 0)
                )
                { html.removeElementAt(i); return 1; }
        return 0;
    }

    public static int all (Vector<? extends HTMLNode> html, LV l, Predicate<String> p)
    {
        IntStream.Builder b = IntStream.builder();
        HTMLNode n;     int removeCount=0;

        for (int i=l.start; i < l.end; i++)
            if ((n=html.elementAt(i)).isCommentNode())       
                if (p.test(((CommentNode) n).body))
                    b.add(i);

        int[] removeArr = b.build().toArray();
        if (removeArr.length == 0) return 0;
        Util.removeNodesOPT(html, removeArr);
        return removeArr.length;
    }

    public static int allExcept (Vector<? extends HTMLNode> html, LV l, Predicate<String> p)
    {
        IntStream.Builder b = IntStream.builder();
        HTMLNode n;     int removeCount=0;

        for (int i=l.start; i < l.end; i++)
            if ((n=html.elementAt(i)).isCommentNode())       
                if (! p.test(((CommentNode) n).body))
                    b.add(i);

        int[] removeArr = b.build().toArray();
        if (removeArr.length == 0) return 0;
        Util.removeNodesOPT(html, removeArr);
        return removeArr.length;
    }
}