export type SquareImageCropRect = {
  x: number;
  y: number;
  size: number;
};

export function clampNumber(value: number, min: number, max: number) {
  return Math.max(min, Math.min(max, value));
}

export function getSquareCropSizeBounds(imageSize: {
  width: number;
  height: number;
}) {
  const maxSize = Math.max(1, Math.min(imageSize.width, imageSize.height));
  const minSize = Math.min(maxSize, Math.max(48, maxSize * 0.18));

  return { minSize, maxSize };
}

export function buildCenteredSquareImageCropRect(imageSize: {
  width: number;
  height: number;
}): SquareImageCropRect {
  const size = Math.max(1, Math.min(imageSize.width, imageSize.height));

  return {
    x: Math.max(0, (imageSize.width - size) / 2),
    y: Math.max(0, (imageSize.height - size) / 2),
    size,
  };
}

export function clampSquareImageCropRect(
  imageSize: { width: number; height: number },
  crop: SquareImageCropRect,
): SquareImageCropRect {
  const { minSize, maxSize } = getSquareCropSizeBounds(imageSize);
  const size = clampNumber(crop.size, minSize, maxSize);

  return {
    x: clampNumber(crop.x, 0, Math.max(0, imageSize.width - size)),
    y: clampNumber(crop.y, 0, Math.max(0, imageSize.height - size)),
    size,
  };
}