from PIL import Image

def brighten_alpha(input_path, output_path):
    img = Image.open(input_path).convert("RGBA")
    width, height = img.size
    pixels = img.load()
    
    # First, find the maximum alpha value in the image
    max_alpha = 0
    for x in range(width):
        for y in range(height):
            r, g, b, a = pixels[x, y]
            if a > max_alpha:
                max_alpha = a
                
    print(f"Original max alpha: {max_alpha}")
    if max_alpha == 0:
        print("Image is completely transparent!")
        return
        
    # Scale alpha to make max_alpha equal to 255
    scale_factor = 255.0 / max_alpha
    changed_count = 0
    
    for x in range(width):
        for y in range(height):
            r, g, b, a = pixels[x, y]
            if a > 0:
                new_a = min(int(a * scale_factor), 255)
                # Keep color as white, but set scaled alpha
                pixels[x, y] = (255, 255, 255, new_a)
                changed_count += 1
                
    img.save(output_path, "PNG")
    print(f"Successfully scaled alpha for {changed_count} pixels and saved to {output_path}")

if __name__ == "__main__":
    brighten_alpha(
        "public/images/slider-glob.png",
        "public/images/slider-glob.png"
    )