//
// Copyright IBM Corp. 2016, 2018
//
// This source code is licensed under the Apache-2.0 license found in the
// LICENSE file in the root directory of this source tree.
//

//-----------------------------
// Dropdown
//-----------------------------

@import '../../globals/scss/vars';
@import '../../globals/scss/helper-mixins';
@import '../../globals/scss/layer';
@import '../../globals/scss/vendor/@carbon/elements/scss/import-once/import-once';
@import '../../globals/scss/css--reset';
@import '../../globals/scss/layout';

/// Dropdown styles
/// @access private
/// @group dropdown
@mixin dropdown {
  .#{$prefix}--dropdown__wrapper--inline {
    display: inline-grid;
    align-items: center;
    grid-template: auto auto / auto min-content;
    grid-gap: rem(4px);

    .#{$prefix}--label {
      @include type-style('body-short-01');
    }

    .#{$prefix}--label,
    .#{$prefix}--form__helper-text,
    .#{$prefix}--form-requirement {
      margin: 0;
    }

    .#{$prefix}--form-requirement {
      grid-column: 2;
    }
  }

  .#{$prefix}--dropdown {
    @include reset;
    @include focus-outline('reset');
    position: relative;
    list-style: none;
    display: block;
    background-color: $field-01;
    border: none;
    border-bottom: 1px solid $ui-04;
    width: 100%;
    height: rem(40px);
    cursor: pointer;
    color: $text-01;
    outline: 2px solid transparent;
    transition: background-color $duration--fast-01 motion(standard, productive);

    &:focus {
      @include focus-outline('outline');
    }

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

  .#{$prefix}--dropdown--open {
    border-bottom-color: $ui-03;
  }

  .#{$prefix}--dropdown--invalid {
    @include focus-outline('invalid');

    .#{$prefix}--dropdown-text {
      padding-right: rem(56px); // TODO: spacing token
    }

    + .#{$prefix}--form-requirement {
      display: inline-block;
      max-height: rem(200px);
      color: $support-01;
    }
  }

  .#{$prefix}--dropdown__invalid-icon {
    position: absolute;
    top: 50%;
    right: rem(40px); // TODO: spacing token
    fill: $support-01;
    transform: translateY(-50%);
  }

  .#{$prefix}--dropdown--open:hover {
    background-color: $field-01;
  }

  .#{$prefix}--dropdown--open:focus {
    outline: 1px solid transparent;
  }

  .#{$prefix}--dropdown--open .#{$prefix}--dropdown-list {
    @include layer('overlay');
  }

  .#{$prefix}--dropdown--light {
    background-color: $field-02;
  }

  .#{$prefix}--dropdown--up .#{$prefix}--dropdown-list {
    bottom: 2rem;
  }

  .#{$prefix}--dropdown__arrow {
    fill: $ui-05;
    position: absolute;
    right: 1rem;
    top: rem(13px);
    pointer-events: none;
    transition: transform $duration--fast-02 motion(standard, productive);
    transform-origin: 50% 45%;
  }

  button.#{$prefix}--dropdown-text {
    // button-reset mixin contradicts with bx--dropdown-text styles
    background: none;
    border: none;
    width: 100%;
    text-align: left;

    &:focus {
      @include focus-outline('outline');
    }
  }

  .#{$prefix}--dropdown-text {
    @include type-style('body-short-01');
    display: block;
    height: rem(40px);
    padding-top: $carbon--spacing-04;
    padding-bottom: $carbon--spacing-04;
    padding-left: $carbon--spacing-05;
    padding-right: rem(42px); // 2rem + SVG width
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .#{$prefix}--dropdown-list {
    @include reset;
    @include focus-outline('reset');
    @include layer('overlay');
    @include type-style('body-short-01');
    background-color: $ui-01;
    display: flex;
    flex-direction: column;
    width: 100%;
    list-style: none;
    position: absolute;
    z-index: z('dropdown');
    max-height: 0;
    transition: max-height $duration--fast-02 motion(standard, productive);
    overflow: hidden auto;
  }

  .#{$prefix}--dropdown:not(.#{$prefix}--dropdown--open)
    .#{$prefix}--dropdown-item {
    visibility: hidden;
  }

  .#{$prefix}--dropdown-item {
    transition: visibility $duration--fast-01 motion(standard, productive),
      opacity $duration--fast-01 motion(standard, productive),
      background-color $duration--fast-01 motion(standard, productive);
    opacity: 0;
    visibility: inherit;

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

      + .#{$prefix}--dropdown-item .#{$prefix}--dropdown-link {
        border-color: transparent;
      }
    }

    &:active {
      background-color: $selected-ui;
    }

    &:first-of-type .#{$prefix}--dropdown-link {
      border-top-color: transparent;
    }
  }

  .#{$prefix}--dropdown-item:last-of-type .#{$prefix}--dropdown-link {
    border-bottom: none;
  }

  .#{$prefix}--dropdown-link {
    @include focus-outline('reset');
    display: block;
    height: rem(40px);
    color: $text-02;
    text-decoration: none;
    font-weight: normal;
    line-height: rem(16px);
    padding: rem(11px) 0;
    margin: 0 $carbon--spacing-05;
    border: 1px solid transparent;
    border-top-color: $ui-03;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;

    &:hover {
      color: $text-01;
      border-color: transparent;
    }
  }

  .#{$prefix}--dropdown--focused,
  .#{$prefix}--dropdown-link:focus {
    @include focus-outline('outline');
    margin: 0;
    padding: rem(11px) rem(16px);
  }

  .#{$prefix}--dropdown-item:hover .#{$prefix}--dropdown-link {
    border-bottom-color: $hover-ui;
  }

  .#{$prefix}--dropdown--selected {
    display: none;
  }

  .#{$prefix}--dropdown--open .#{$prefix}--dropdown__arrow {
    transform: rotate(-180deg);
  }

  .#{$prefix}--dropdown--open .#{$prefix}--dropdown-list {
    max-height: 15rem;
    transition: max-height $duration--fast-02 motion(entrance, productive);
  }

  .#{$prefix}--dropdown--open .#{$prefix}--dropdown-item {
    opacity: 1;
  }

  .#{$prefix}--dropdown--disabled {
    border-bottom-color: transparent;
    cursor: not-allowed;

    &:hover {
      background-color: $field-01;
    }

    &:focus {
      outline: none;
    }

    .#{$prefix}--dropdown-text {
      color: $disabled-02;
    }

    .#{$prefix}--dropdown__arrow {
      fill: $disabled-02;
    }

    &.#{$prefix}--dropdown--light:hover {
      background-color: $field-02;
    }
  }

  .#{$prefix}--dropdown--auto-width {
    width: auto;
    max-width: rem(400px);
  }

  .#{$prefix}--dropdown--inline {
    justify-self: start;
    display: inline-block;
    border-bottom-color: transparent;
    width: auto;
    height: rem(32px);
    background-color: $ui-background;
    transition: background $duration--fast-01 motion(entrance, productive);

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

    &.#{$prefix}--dropdown--disabled {
      background-color: $ui-background;
    }

    .#{$prefix}--dropdown__arrow {
      top: rem(8px);
      right: rem(8px);
    }
  }

  .#{$prefix}--dropdown--inline.#{$prefix}--dropdown--open {
    background-color: transparent;
  }

  .#{$prefix}--dropdown--inline .#{$prefix}--dropdown-text {
    display: inline-block;
    padding: rem(7px) rem(32px) rem(7px) $carbon--spacing-04; // TODO: spacing token
    height: rem(32px);
    overflow: visible;
    color: $text-01;
  }

  .#{$prefix}--dropdown--inline.#{$prefix}--dropdown--disabled
    .#{$prefix}--dropdown-text {
    color: $disabled-02;
  }

  .#{$prefix}--dropdown--inline.#{$prefix}--dropdown--disabled:focus
    .#{$prefix}--dropdown-text {
    outline: 0;
  }

  .#{$prefix}--dropdown--inline.#{$prefix}--dropdown--invalid
    .#{$prefix}--dropdown__invalid-icon {
    right: rem(32px);
  }

  .#{$prefix}--dropdown--inline.#{$prefix}--dropdown--invalid
    .#{$prefix}--dropdown-text {
    padding-right: rem(56px);
  }

  .#{$prefix}--dropdown--inline.#{$prefix}--dropdown--open:focus
    .#{$prefix}--dropdown-list {
    @include layer('overlay');
  }

  .#{$prefix}--dropdown--inline .#{$prefix}--dropdown-link {
    font-weight: normal;
    margin-right: $carbon--spacing-04;
    margin-left: rem(10px);

    &:focus {
      margin: 0;
      padding-left: rem(10px);
    }
  }

  // Skeleton State
  .#{$prefix}--dropdown-v2.#{$prefix}--skeleton,
  .#{$prefix}--dropdown.#{$prefix}--skeleton {
    @include skeleton;
  }
}

@include exports('dropdown') {
  @include dropdown;
}