@import "../../../styles/variables.scss";

$novo-layout-content-z-index: 1;
$novo-layout-side-drawer-z-index: 2;
$novo-layout-backdrop-z-index: 3;
$novo-drawer-over-drawer-z-index: 4;

// stylelint-disable max-line-length
// Mixin that creates a new stacking context.
// see https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Positioning/Understanding_z_index/The_stacking_context
// stylelint-enable
@mixin novo-stacking-context($z-index: 1) {
  position: relative;

  // Use a z-index to create a new stacking context. (We can't use transform because it breaks fixed
  // positioning inside of the transformed element).
  z-index: $z-index;
}

.novo-layout-container {
  // We need a stacking context here so that the backdrop and drawers are clipped to the
  // MatDrawerContainer. This creates a new z-index stack so we use low numbered z-indices.
  // We create another stacking context in the '.novo-layout-content' and in each drawer so that
  // the application content does not get messed up with our own CSS.
  @include novo-stacking-context();

  box-sizing: border-box;
  -webkit-overflow-scrolling: touch;

  // Need this to take up space in the layout.
  display: block;

  // Hide the drawers when they're closed.
  overflow: hidden;

  height: 100%;

  // TODO(hansl): Update this with a more robust solution.
  &[fullscreen] {
    &.novo-layout-container-has-open {
      overflow: hidden;
    }
  }

  // When the consumer explicitly enabled the backdrop,
  // we have to pull the side drawers above it.
  &.novo-layout-container-explicit-backdrop .novo-drawer-side {
    z-index: $novo-layout-backdrop-z-index;
  }

  // Note that the `NoopAnimationsModule` is being handled inside of the component code.
  &.ng-animate-disabled,
  .ng-animate-disabled & {
    .novo-drawer-backdrop,
    .novo-layout-content {
      transition: none;
    }
  }
}

.novo-drawer-backdrop {
  display: block;
  position: absolute;
  background: #000;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;

  // Because of the new stacking context, the z-index stack is new and we can use our own
  // numbers.
  z-index: $novo-layout-backdrop-z-index;

  // We use 'visibility: hidden | visible' because 'display: none' will not animate any
  // transitions, while visibility will interpolate transitions properly.
  // see https://developer.mozilla.org/en-US/docs/Web/CSS/visibility, the Interpolation
  // section.
  visibility: hidden;

  &.novo-drawer-shown {
    visibility: visible;
  }

  .novo-drawer-transition & {
    transition: {
      duration: 100ms;
      timing-function: ease-out;
      property: background-color, visibility;
    }
  }

  opacity: 0.5;
}

.novo-layout-content {
  @include novo-stacking-context($novo-layout-content-z-index);

  display: block;
  height: 100%;
  overflow: auto;

  .novo-drawer-transition & {
    transition: {
      duration: 100ms;
      timing-function: ease-out;
      property: transform, margin-left, margin-right;
    }
  }
}

.novo-rail {
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  height: inherit;
  height: 100%;
  min-width: 5rem;
  width: max-content;
  background: var(--background-bright);
  .novo-rail-contents {
    display: inline-flex;
    flex-direction: column;
    width: -webkit-fill-available;
  }
}

.novo-layout-content-container {
  display: grid;
  grid-template-columns: 1fr;
  height: 100%;
  &.and-has-rail {
    grid-template-columns: auto 1fr;
  }
}