001/*
002 * jPOS Project [http://jpos.org]
003 * Copyright (C) 2000-2026 jPOS Software SRL
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Affero General Public License as
007 * published by the Free Software Foundation, either version 3 of the
008 * License, or (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Affero General Public License for more details.
014 *
015 * You should have received a copy of the GNU Affero General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018
019package org.jpos.log.render.markdown;
020
021import org.jpos.log.LogRenderer;
022import org.jpos.util.Profiler;
023
024import java.io.PrintStream;
025import java.util.Set;
026
027public final class ProfilerMarkdownRenderer implements LogRenderer<Profiler> {
028    public ProfilerMarkdownRenderer() {
029    }
030
031    @Override
032    public void render(Profiler prof, PrintStream ps, String indent) {
033        var events = prof.getEvents();
034        int width = maxLength(events.keySet());
035        final String fmt = "| %-" + width + "s | %10.10s | %10.10s |%n";
036        ps.print (row(fmt, "Checkpoint", "Elapsed", "Total"));
037        ps.print(
038          row(fmt, "-".repeat(width), "---------:", "-------:")
039        );
040        StringBuilder graph = new StringBuilder();
041        events.forEach((key, v) -> {
042            ps.print(
043              row(fmt, v.getEventName(), toMillis(v.getDurationInNanos()), toMillis(v.getTotalDurationInNanos()))
044            );
045            graph.append ("  \"%s\" : %s%n".formatted(key, toMillis(v.getDurationInNanos())));
046        });
047        ps.println();
048        ps.println ("```mermaid");
049        ps.println ("pie title Profiler");
050        ps.println (graph);
051        ps.println ("```");
052
053    }
054    public Class<?> clazz() {
055        return Profiler.class;
056    }
057
058    public Type type() {
059        return Type.MARKDOWN;
060    }
061    private String row (String fmt, String c1, String c2, String c3) {
062        return fmt.formatted(c1, c2, c3);
063    }
064    
065    private String toMillis(long nanos) {
066        long millis = nanos / Profiler.TO_MILLIS;
067        long fractional = (nanos % Profiler.TO_MILLIS) / (Profiler.TO_MILLIS / 1000);
068        return String.format("%d.%03d", millis, fractional);
069    }
070    private int maxLength (Set<String> keys) {
071        return keys.stream()
072          .mapToInt(String::length)
073          .max()
074          .orElse(0); // R
075    }
076}