const DEFAULT_RESOLUTIONS = [
  640,
  // older and lower-end phones
  750,
  // iPhone 6-8
  828,
  // iPhone XR/11
  960,
  // older horizontal phones
  1080,
  // iPhone 6-8 Plus
  1280,
  // 720p
  1668,
  // Various iPads
  1920,
  // 1080p
  2048,
  // QXGA
  2560,
  // WQXGA
  3200,
  // QHD+
  3840,
  // 4K
  4480,
  // 4.5K
  5120,
  // 5K
  6016
  // 6K
];
const LIMITED_RESOLUTIONS = [
  640,
  // older and lower-end phones
  750,
  // iPhone 6-8
  828,
  // iPhone XR/11
  1080,
  // iPhone 6-8 Plus
  1280,
  // 720p
  1668,
  // Various iPads
  2048,
  // QXGA
  2560
  // WQXGA
];
const getWidths = ({
  width,
  layout,
  breakpoints = DEFAULT_RESOLUTIONS,
  originalWidth
}) => {
  const smallerThanOriginal = (w) => !originalWidth || w <= originalWidth;
  if (layout === "full-width") {
    return breakpoints.filter(smallerThanOriginal);
  }
  if (!width) {
    return [];
  }
  const doubleWidth = width * 2;
  const maxSize = originalWidth ? Math.min(doubleWidth, originalWidth) : doubleWidth;
  if (layout === "fixed") {
    return originalWidth && width > originalWidth ? [originalWidth] : [width, maxSize];
  }
  if (layout === "constrained") {
    return [
      // Always include the image at 1x and 2x the specified width
      width,
      doubleWidth,
      ...breakpoints
    ].filter((w) => w <= maxSize).sort((a, b) => a - b);
  }
  return [];
};
const getSizesAttribute = ({
  width,
  layout
}) => {
  if (!width || !layout) {
    return void 0;
  }
  switch (layout) {
    // If screen is wider than the max size then image width is the max size,
    // otherwise it's the width of the screen
    case "constrained":
      return `(min-width: ${width}px) ${width}px, 100vw`;
    // Image is always the same width, whatever the size of the screen
    case "fixed":
      return `${width}px`;
    // Image is always the width of the screen
    case "full-width":
      return `100vw`;
    case "none":
    default:
      return void 0;
  }
};
export {
  DEFAULT_RESOLUTIONS,
  LIMITED_RESOLUTIONS,
  getSizesAttribute,
  getWidths
};