/**
 * Adds the styles for the label which displays the currently selected level.
 */
@mixin _buildingLevelPickerLabel($container, $theme) {
  $base: "#{$container}-label";
  $active: "#{$base}--active";
  $hover: "#{$base}--hover";
  $empty: "#{$base}--empty";
  $clear-button: "#{$base}__clear-button";
  $clear-button-icon: "#{$base}__clear-button-icon";

  $width: 90px;
  $height: 40px;
  $padding: map-get($theme, padding);

  .#{$base} {
    color: map-get($theme, label-color);
    text-align: center;
    font-size: $height;
    line-height: $height;
  }

  .#{$base},
  .#{$empty} {
    position: relative;

    width: $width;

    cursor: pointer;
    transition: opacity 0.3s;
    text-align: center;

    &.#{$active} {
      color: map-get($theme, label-color--active);
    }
  }

  .#{$empty} {
    font-size: $font-size;
    font-weight: $font-weight--light;
    color: map-get($theme, label-color--empty);
    cursor: default;
  }

  .#{$clear-button} {
    $size: 20px;
    $icon-size: 12px;

    font-size: $icon-size;
    line-height: $icon-size;

    position: absolute;
    top: 10px; // Align with the label.

    display: none;

    width: $size;
    height: $size;
    margin-left: $side-spacing--quarter;
    padding: ($size - $icon-size) / 2;

    cursor: pointer;
    transition: all 0.1s ease-in-out;

    color: $interactive-font-color;
    border: none;
    border-radius: 50%;

    appearance: none;

    &:hover {
      background: $background-color--hover;
    }
  }

  // Show the button when we have an active level.
  .#{$active} .#{$clear-button} {
    display: inline-block;
  }
}

/**
 * Adds the styles for each of the levels in the level picker level stack.
 */
@mixin _buildingLevelPickerLevel($container, $theme) {
  $item-container: "#{$container}-item";
  $base: "#{$container}-item__base";
  $hover: "#{$container}-item--hover";
  $active: "#{$container}-item--active";
  $animate-level: "#{$container}--animate-level";

  .#{$item-container} {
    border: 1px solid transparent;

    will-change: height;
    touch-action: none;
  }

  .#{$base} {
    position: absolute;
    left: 50%;

    transform: translate(-50%, -50%);
    pointer-events: none;

    will-change: height;

    .rect {
      position: absolute;
      top: 50%;
      left: 50%;

      margin-top: 3px;

      transform: translate(-50%, -50%) rotateX(66deg) rotateZ(45deg);
      pointer-events: none;

      border: map-get($theme, level-border-width) solid map-get($theme, level-border-color);
      outline: solid 1px transparent; // So things don't move when focusing
      background-color: map-get($theme, level-background-color);

      will-change: height;
    }
  }

  .#{$hover} .#{$base} {
    .rect {
      border-color: map-get($theme, level-border-color--hover);
      background-color: map-get($theme, level-background-color--hover);
      box-shadow: 0 0 2px 1px map-get($theme, level-border-color--hover);
    }
  }

  .#{$active} .#{$base} {
    .rect {
      border-color: map-get($theme, level-border-color--active);
      background-color: map-get($theme, level-background-color--active);
    }
  }

  $in-duration: 0.1s;
  $out-duration: 0.3s;

  $bg-transition: background-color $in-duration ease-in-out;
  $border-transition: border-color $in-duration ease-in-out;

  $spring: cubic-bezier(0.63, -0.265, 0.48, 1.64);
  $size-transition-out: height $out-duration $spring, width $out-duration $spring;
  $size-transition-in: height $in-duration ease-out, width $in-duration ease-out;

  .#{$item-container} {
    &,
    .#{$base},
    .rect {
      transition: $size-transition-in, $bg-transition, $border-transition;
    }
  }

  // Animate everything when the $animate-level class is present in the parent.
  .#{$animate-level} .#{$item-container} {
    &,
    .#{$base},
    .rect {
      transition: $size-transition-out, $bg-transition, $border-transition;
    }
  }
}

/**
 * Adds all the styles for the level picker used in the building explorer.
 */
@mixin buildingLevelPicker() {
  $container: "esri-building-level-picker";
  $levels-container: "#{$container}__levels-container";
  $levels-inner-container: "#{$container}__inner-levels-container";
  $label-container: "#{$container}__label-container";
  $no-level: "#{$container}--no-level";
  $arrow-up: "#{$container}__arrow-up";
  $arrow-down: "#{$container}__arrow-down";

  $padding: 12px;

  $theme: (
    padding: $padding,
    label-color: $interactive-font-color,
    label-color--empty: $font-color,
    label-color--active: $border-color--active,
    level-border-width: 2px,
    level-border-color: $border-color,
    level-border-color--hover: $border-color--active,
    level-border-color--active: $border-color--active,
    level-background-color: rgba(#fff, 0.7),
    level-background-color--hover: rgba(#fff, 0.7),
    level-background-color--active: $border-color--active
  );

  .#{$container} {
    display: flex;
    flex-direction: row;

    align-items: center;

    &.#{$no-level} {
      display: none;
    }
  }

  .#{$levels-container} {
    display: flex;
    flex-direction: column;

    width: 50%;
    padding: 20px 0;

    cursor: pointer;
    transform: rotate(180deg); // So that our levels stack properly.

    justify-content: flex-start;
    align-items: center;
  }

  .#{$levels-inner-container} {
    transition: margin 0.3s;
  }

  .#{$label-container} {
    display: flex;
    flex-direction: column;
    justify-content: space-between;

    width: 50%;
    height: 90px;
    margin-right: $padding;

    align-items: center;
  }

  @include _buildingLevelPickerLabel($container, $theme);
  @include _buildingLevelPickerLevel($container, $theme);

  .#{$arrow-up},
  .#{$arrow-down} {
    @include arrowButton();
  }

  .#{$arrow-up} {
    @extend .esri-arrow-up;
  }

  .#{$arrow-down} {
    @extend .esri-arrow-down;
  }
}
