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///////////////////////////
// Your API to work with //
///////////////////////////

abstract sclass GameForAI {
  abstract RGBImage getImage();
  abstract L<Rect> submit(Pt point); // returns correct solution so AI can learn from it
}

abstract sclass AI {
  // stuff you get
  
  GameForAI game;
  RGBImage image;
  int steps;
  RGBImage image() { ret image; }
  int w() { ret image.w(); }
  int h() { ret image.h(); }
  L<Rect> submit(Pt p) { ret game.submit(p); }
  L<Rect> submit(Rect r) { ret submit(middleOfRect(r)); }
  L<Rect> submitNothing() { ret game.submit(null); }
  Rect leftRect() { ret main.leftRect(image); }
  Rect rightRect() { ret main.rightRect(image); }
  L<Rect> clickLeft() { ret submit(leftRect()); }
  L<Rect> clickRight() { ret submit(rightRect()); }
  L<Rect> clickLeftIf(bool b) { ret b ? clickLeft() : clickRight(); }
  L<Rect> clickRightIf(bool b) { ret b ? clickRight() : clickLeft(); }
  RGBImage leftImage() { ret image.clip(leftRect()); }
  RGBImage rightImage() { ret image.clip(rightRect()); }

  // implement this method and call submit()
  abstract void go();
  
  void done() {}
}

static int singleImageWidth(RGBImage img) { ret (img.w()-spacing)/2; }

static Rect leftRect(RGBImage img) {
  int iw = singleImageWidth(img);
  ret new Rect(0, 0, iw, h);
}

static Rect rightRect(RGBImage img) {
  int iw = singleImageWidth(img);
  ret new Rect(iw+spacing, 0, iw, h);
}

//////////////////////////////////////
// Test AIs. Just add your own here //
//////////////////////////////////////

AI > ClickOnBrighterImage {
  void go {
    clickLeftIf(rgbAverageBrightness(leftImage()) > rgbAverageBrightness(rightImage()));
  }
}

///////////////
// Main Game //
///////////////

static S instruction = "Click on the brighter image";
static int w = 150, h = 150; // size of each image (left/right)
static int spacing = 10; // space between the two images
static int rounds = 1000;
static bool alwaysNewImage = true; // prevents AIs being stuck on an image
static int fps = 50;

static int points, clicks;
static ImageSurface is, isWrong;
static long isWrongLast;
static RGBImage img;
static new HashMap<Rect, Int> words;
static L<Rect> solution;
volatile sbool aiMode;
static JLabel lblScore, lblTiming;
static new HashMap<Class, AI> ais;

p-substance {
  thread { loadBinarySnippet(#1004373); } // preload applause animation
  nextImage();
  addToWindow(is, withMargin(lblScore = jcenteredBoldLabel("Your score: 0 of 0")));
  for (final Class c : myNonAbstractClassesImplementing(AI)) {
    final S name = shortClassName(c);
    final JButton btn = jbutton(name);
    onClick(btn, r {
      if (aiMode) ret;
      btn.setText(name + " Running...");
      thread {
        Game game = testAI(c, voidfunc(Game game) {
          if (game.step < 50 || (game.step % 10) == 0 || game.step == rounds) {
            S text = name + " scored " + game.points + " of " + game.step;
            if (game.error != null)
              text += " - ERROR: " + game.error;
            setText_noWait(btn, text);
          }
        });
      }
    });
    addToWindow(is, withMargin(btn));
  }
  addToWindow(is, lblTiming = jCenteredLabel(;
  titlePopupMenuItem(is, "Restart AIs", r { clearMapWithCleanUp(ais); });
  addToWindow(is, withMargin(jbutton("Restart AIs", r { clearMapWithCleanUp(ais); })));
  
  packFrame(is);
  centerTopFrame(is);
  hideConsole();
}

svoid nextImage {
  RGBImage img = rgbImage(0xeef3e6, w*2+spacing, h);
  double l = random(10)/10.0, r = random(10)/10.0;
  Rect lr = leftRect(img), rr = rightRect(img);
  rgbFill(img, lr, new RGB(l));
  rgbFill(img, rr, new RGB(r));
  solution = l > r ? ll(lr) : l == r ? ll(lr, rr) : ll(rr);
  
  main.img = img;
  if (aiMode) ret; // occasional updates only when AI is running
  showTheImage();
}

svoid showTheImage {
  bool first = is == null;
  is = showZoomedImage_centered(is, img, 1.5);
  if (first) {
    setFrameTitle(is, instruction);
    onLeftClick(is, voidfunc(Pt p) {
      ++clicks;
      if (anyRectContains(solution, is.pointFromComponentCoordinates(p))) {
        ++points;
        nextImage();
      } else if (alwaysNewImage) nextImage();
      lblScore.setText(print("Your score: " + points + " of " + clicks));
    });
    disableImageSurfaceSelector(is);
    
    // animate if idle
    awtEvery(is, 1000, r {
      if (!aiMode && isInForeground(is) && !mouseInComponent(is))
        nextImage();
    });
    
    // show current image occasionally when AI is running
    awtEvery(is, 1000/fps, r {
      if (aiMode) showTheImage();
    });
  }
}

// AI stuff

sclass Game extends GameForAI {
  int points, step;
  Pt submitted;
  Throwable error;
  
  RGBImage getImage() { ret img; }

  L<Rect> submit(Pt p) {
    if (submitted != null) fail("No multi-submit please");
    submitted = p == null ? new Pt(-9, -9) : p;
    if (p != null && anyRectContains(solution, p)) {
      ++points;
      if (!alwaysNewImage) nextImage();
    }
    ret solution;
  }
}

static Game scoreAI(AI ai, O onScore) {
  aiMode = true;
  final long start = sysNow();
  try {
    final new Game game;
    setOpt(ai, +game);
    while (game.step < rounds) {
      ++game.step;
      ++ai.steps;
      game.submitted = null;
      int points = game.points;
      RGBImage image = img;
      try {
        setOpt(ai, +image);
        ai.go();
      } catch e {
        if (game.error == null) { // print first error to console
          showConsole();
          printStackTrace(e);
        }
        game.error = e;
      } finally {
        setOpt(ai, image := null);
      }
      if (points == game.points && hasElapsed(isWrongLast, 50)) {
        isWrongLast = sysNow();
        bool first = isWrong == null;
        isWrong = showImage(isWrong, "Last Blunder", rgbMarkPoint(image, game.submitted, Color.red, 3));
        if (first) {
          setFrameWidth(isWrong, 230);
          moveToTopRightCorner(isWrong);
          moveFrameDown(isWrong, 100);
        }
      }
      pcallF(onScore, game);
      if (alwaysNewImage) nextImage();
    }
    print("AI " + shortClassName(ai) + " points after " + rounds + " rounds: " + game.points);
    ai.done();
    if (game.points >= rounds) thread {
      titleStatus(is, "Solved!");
      showAnimationInTopLeftCorner(#1004373, game.points + " of " + rounds + " points!!", 3.0);
    }
    ret game;
  } finally {
    aiMode = false;
    awt {
      lblTiming.setText(formatDouble(toSeconds(sysNow()-start), 1) + " s");
      nextImage();
    }
  }
}

static AI getAI(Class<? extends AI> c) {
  AI ai = ais.get(c);
  if (ai == null) ais.put(c, ai = nu(c));
  ret ai;
}

// onScore: voidfunc(Game)
static Game testAI(Class<? extends AI> c, O onScore) {
  ret scoreAI(getAI(c), onScore);
}

Began life as a copy of #1006753