// Image with click-to-zoom lightbox. The host wraps the `<img>` and is
// sized by the consumer (CSS / inline styles on `<wr-lightbox>`).

@use '../../theme/styles' as theme;

.wr-lightbox {
  display: inline-block;
  position: relative;
  overflow: hidden;
  @include theme.smooth-br(var(--wr-lightbox-radius, var(--wr-border-radius-base)));
  cursor: zoom-in;
  background: var(--wr-color-hover);

  // Reserve space before the image resolves so the box doesn't collapse to
  // 0 and shove the layout when the thumbnail pops in.
  &--loading {
    min-height: var(--wr-lightbox-loading-min-height, 4rem);
  }

  &--loading::after {
    content: '';
    position: absolute;
    inset: 0;
    // Sit above the host's empty placeholder background and below the image,
    // so the shimmer is visible over the reserved area while loading.
    background: linear-gradient(
      90deg,
      rgba(var(--wr-color-white-rgb), 0) 0%,
      rgba(var(--wr-color-white-rgb), 0.45) 50%,
      rgba(var(--wr-color-white-rgb), 0) 100%
    );
    background-size: 200% 100%;
    animation: wr-lightbox-shimmer 1.4s linear infinite;
    pointer-events: none;
    z-index: 1;
  }

  &__trigger {
    display: block;
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    border: 0;
    background: transparent;
    cursor: zoom-in;

    &:focus-visible {
      outline: 2px solid var(--wr-color-primary);
      outline-offset: 2px;
    }
  }

  &__thumb {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    user-select: none;
    -webkit-user-drag: none;
    // Fade in once the `loaded` signal drops the `--loading` class, so the
    // image resolves smoothly instead of snapping in. Sits above the shimmer.
    position: relative;
    z-index: 2;
    opacity: 1;
    transition: opacity 0.25s ease;
  }

  &--loading &__thumb {
    opacity: 0;
  }
}

@keyframes wr-lightbox-shimmer {
  from {
    background-position: 200% 0;
  }
  to {
    background-position: -200% 0;
  }
}

.wr-lightbox-backdrop {
  background: rgba(var(--wr-color-backdrop-rgb), 0.85);
}

.wr-lightbox-overlay {
  pointer-events: auto;
}

.wr-lightbox-viewer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  max-width: 95vw;
  max-height: 95vh;
  padding: 1rem;
  animation: wr-lightbox-viewer-in 0.18s ease;
  outline: none;
  // Own the swipe-down-to-dismiss gesture; no scroll/zoom to defer to.
  touch-action: none;

  &__close {
    --wr-icon-size: 1.25rem;
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    border: 0;
    border-radius: 999px;
    background: rgba(var(--wr-color-white-rgb), 0.12);
    color: rgba(var(--wr-color-white-rgb), 0.9);
    cursor: pointer;
    transition:
      background 0.15s ease,
      transform 0.15s ease;

    @include theme.touch-target($positioned: true); // 36px -> 44px tap area on touch

    &:hover {
      background: rgba(var(--wr-color-white-rgb), 0.2);
    }

    &:active {
      transform: scale(0.95);
    }

    &:focus-visible {
      outline: 2px solid rgba(var(--wr-color-white-rgb), 0.9);
      outline-offset: 2px;
    }
  }

  &__full {
    display: block;
    max-width: 100%;
    max-height: calc(95vh - 4rem);
    object-fit: contain;
    cursor: zoom-out;
    @include theme.smooth-br(0.5rem);
  }

  &__caption {
    color: rgba(var(--wr-color-white-rgb), 0.85);
    font-family: var(--wr-font-family-base);
    font-size: var(--wr-text-sm);
    text-align: center;
    max-width: 60ch;
  }
}

@keyframes wr-lightbox-viewer-in {
  from {
    opacity: 0;
    transform: scale(0.96);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}