package de.ph87.kindermalen.drawing;

import lombok.ToString;
import lombok.extern.slf4j.Slf4j;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;

@Slf4j
@ToString
public class Drawing {

  public final int width;

  public final int height;

  public final ZonedDateTime created = ZonedDateTime.now();

  @ToString.Exclude
  private final Layer current;

  public Drawing(final int width, final int height) {
    this.width = width;
    this.height = height;
    current = new Layer(width, height);
    log.info("New Drawing: {}", this);
  }

  public Graphics2D getGraphics() {
    return (Graphics2D) current.getCurrent().getGraphics();
  }

  public void publish() {
    current.publish();
  }

  public void undo() {
    current.undo();
  }

  public void redo() {
    current.redo();
  }

  public void newRevision() {
    current.newRevision();
  }

  public void save(final File dir) throws IOException {
    final int revision = current.getRevision();
    final BufferedImage image = current.getCurrent();
    final File subdir = new File(dir, created.format(DateTimeFormatter.ISO_LOCAL_DATE_TIME));
    final File file = new File(subdir, "%05d".formatted(revision) + ".png");
    if (subdir.mkdirs()) {
      log.debug("Directory created: {}", subdir);
    }
    new Thread(() -> {
      try {
        ImageIO.write(image, "PNG", file);
      } catch (IOException e) {
        log.error(e.toString());
      }
    }).start();
  }

  public Image getImage() {
    return current.getCurrent();
  }

}