// Copyright 2015 Palantir Technologies, Inc. All rights reserved.
// Licensed under the Apache License, Version 2.0.

@import "../../common/variables";
@import "../forms/common";
@import "./common";

/*
Button groups

Markup:
<div class="#{$ns}-button-group {{.modifier}}">
  <button type="button" class="#{$ns}-button #{$ns}-intent-success">Save</button>
  <button type="button" class="#{$ns}-button #{$ns}-intent-success #{$ns}-icon-caret-down"></button>
</div>
<div class="#{$ns}-button-group {{.modifier}}">
  <a class="#{$ns}-button #{$ns}-icon-database" tabindex="0" role="button">Queries</a>
  <a class="#{$ns}-button #{$ns}-icon-function" tabindex="0" role="button">Functions</a>
  <a class="#{$ns}-button" tabindex="0" role="button">
    Options <span class="#{$ns}-icon-standard #{$ns}-icon-caret-down #{$ns}-align-right"></span>
  </a>
</div>
<div class="#{$ns}-button-group {{.modifier}}">
  <a class="#{$ns}-button #{$ns}-icon-chart" tabindex="0" role="button"></a>
  <a class="#{$ns}-button #{$ns}-icon-control" tabindex="0" role="button"></a>
  <a class="#{$ns}-button #{$ns}-icon-graph" tabindex="0" role="button"></a>
  <a class="#{$ns}-button #{$ns}-icon-camera" tabindex="0" role="button"></a>
  <a class="#{$ns}-button #{$ns}-icon-map" tabindex="0" role="button"></a>
  <a class="#{$ns}-button #{$ns}-icon-code" tabindex="0" role="button"></a>
  <a class="#{$ns}-button #{$ns}-icon-th" tabindex="0" role="button"></a>
  <a class="#{$ns}-button #{$ns}-icon-time" tabindex="0" role="button"></a>
  <a class="#{$ns}-button #{$ns}-icon-compressed" tabindex="0" role="button"></a>
</div>

.#{$ns}-fill - Buttons expand equally to fill container
.#{$ns}-large - Use large buttons
.#{$ns}-minimal - Use minimal buttons
.#{$ns}-vertical - Vertical layout

Styleguide button-group
*/

.#{$ns}-button-group {
  display: inline-flex;

  .#{$ns}-button {
    // ensure button can never be smaller than its default size
    flex: 0 0 auto;
    position: relative;
    z-index: index($control-group-stack, "button-default");

    // the ordering of these z-index CSS rules is particular because of CSS
    // selector specificity. specifically, disabled styles should have
    // precedence over hover and active styles to prevent mouse interactions on
    // disabled buttons from reordering elements in the stack.

    &:focus {
      z-index: index($control-group-stack, "button-focus");
    }

    &:hover {
      z-index: index($control-group-stack, "button-hover");
    }

    &:active,
    &.#{$ns}-active {
      z-index: index($control-group-stack, "button-active");
    }

    &:disabled,
    &.#{$ns}-disabled {
      z-index: index($control-group-stack, "button-disabled");
    }

    &[class*="#{$ns}-intent-"] {
      z-index: index($control-group-stack, "intent-button-default");

      &:focus {
        z-index: index($control-group-stack, "intent-button-focus");
      }

      &:hover {
        z-index: index($control-group-stack, "intent-button-hover");
      }

      &:active,
      &.#{$ns}-active {
        z-index: index($control-group-stack, "intent-button-active");
      }

      &:disabled,
      &.#{$ns}-disabled {
        z-index: index($control-group-stack, "intent-button-disabled");
      }
    }
  }

  // support wrapping buttons in a tooltip, which adds a wrapper element
  &:not(.#{$ns}-minimal) {
    > .#{$ns}-popover-wrapper:not(:first-child) .#{$ns}-button,
    > .#{$ns}-button:not(:first-child) {
      border-top-left-radius: 0;
      border-bottom-left-radius: 0;
    }

    > .#{$ns}-popover-wrapper:not(:last-child) .#{$ns}-button,
    > .#{$ns}-button:not(:last-child) {
      margin-right: -$button-border-width;
      border-top-right-radius: 0;
      border-bottom-right-radius: 0;
    }
  }

  &.#{$ns}-minimal {
    .#{$ns}-button {
      @include pt-button-minimal();
    }
  }

  .#{$ns}-popover-wrapper,
  .#{$ns}-popover-target {
    display: flex;
    flex: 1 1 auto;
  }

  /*
  Responsive

  Markup:
  <div class="#{$ns}-button-group #{$ns}-large #{$ns}-fill">
    <a class="#{$ns}-button #{$ns}-intent-primary #{$ns}-fixed" tabindex="0" role="button">Start</a>
    <a class="#{$ns}-button #{$ns}-intent-primary" tabindex="0" role="button">Left</a>
    <a class="#{$ns}-button #{$ns}-intent-primary #{$ns}-active" tabindex="0" role="button">Middle</a>
    <a class="#{$ns}-button #{$ns}-intent-primary" tabindex="0" role="button">Right</a>
    <a class="#{$ns}-button #{$ns}-intent-primary #{$ns}-fixed" tabindex="0" role="button">End</a>
  </div>
  <br />
  <div class="#{$ns}-button-group #{$ns}-fill">
    <button class="#{$ns}-button #{$ns}-icon-arrow-left"></button>
    <button class="#{$ns}-button #{$ns}-fill">Middle</button>
    <button class="#{$ns}-button #{$ns}-icon-arrow-right"></button>
  </div>

  Styleguide button-group}-fill
  */

  &.#{$ns}-fill {
    display: flex;
    width: 100%;
  }

  .#{$ns}-button.#{$ns}-fill,
  &.#{$ns}-fill .#{$ns}-button:not(.#{$ns}-fixed) {
    flex: 1 1 auto;
  }

  /*
  Vertical button groups

  Markup:
  <div class="#{$ns}-button-group #{$ns}-vertical">
    <a class="#{$ns}-button #{$ns}-icon-search-template" role="button" tabindex="0"></a>
    <a class="#{$ns}-button #{$ns}-icon-zoom-in" role="button" tabindex="0"></a>
    <a class="#{$ns}-button #{$ns}-icon-zoom-out" role="button" tabindex="0"></a>
    <a class="#{$ns}-button #{$ns}-icon-zoom-to-fit" role="button" tabindex="0"></a>
  </div>
  <div class="#{$ns}-button-group #{$ns}-vertical">
    <button type="button" class="#{$ns}-button #{$ns}-active">Home</button>
    <button type="button" class="#{$ns}-button">Pages</button>
    <button type="button" class="#{$ns}-button">Blog</button>
    <button type="button" class="#{$ns}-button">Calendar</button>
  </div>
  <div class="#{$ns}-button-group #{$ns}-vertical #{$ns}-align-left #{$ns}-large">
    <button type="button" class="#{$ns}-button #{$ns}-intent-primary #{$ns}-icon-document">Text</button>
    <button type="button" class="#{$ns}-button #{$ns}-intent-primary #{$ns}-icon-media #{$ns}-active">Media</button>
    <button type="button" class="#{$ns}-button #{$ns}-intent-primary #{$ns}-icon-link">Sources</button>
  </div>

  Styleguide button-group-vertical
  */

  &.#{$ns}-vertical {
    flex-direction: column;
    align-items: stretch;
    vertical-align: top;

    &.#{$ns}-fill {
      width: unset;
      height: 100%;
    }

    .#{$ns}-button {
      // we never want that margin-right when vertical
      margin-right: 0 !important; // stylelint-disable-line declaration-no-important
      // needed to ensure buttons take up the full width when wrapped in a Popover:
      width: 100%;
    }

    &:not(.#{$ns}-minimal) {
      > .#{$ns}-popover-wrapper:first-child .#{$ns}-button,
      > .#{$ns}-button:first-child {
        border-radius: $pt-border-radius $pt-border-radius 0 0;
      }

      > .#{$ns}-popover-wrapper:last-child .#{$ns}-button,
      > .#{$ns}-button:last-child {
        border-radius: 0 0 $pt-border-radius $pt-border-radius;
      }

      > .#{$ns}-popover-wrapper:not(:last-child) .#{$ns}-button,
      > .#{$ns}-button:not(:last-child) {
        margin-bottom: -$button-border-width;
      }
    }
  }

  &.#{$ns}-align-left .#{$ns}-button {
    text-align: left;
  }

  .#{$ns}-dark & {
    // support wrapping buttons in a Blueprint.Tooltip, which adds a wrapper element
    // in dark theme, we adjust the spacing between buttons for best visual results
    &:not(.#{$ns}-minimal) {
      // deeply nested selector necessary to target the appropriate popover
      // wrapper, yet ensure we only style buttons within the target.
      > .#{$ns}-popover-wrapper:not(:last-child) .#{$ns}-button,
      > .#{$ns}-button:not(:last-child) {
        margin-right: $button-border-width;
      }
    }

    &.#{$ns}-vertical {
      > .#{$ns}-popover-wrapper:not(:last-child) .#{$ns}-button,
      > .#{$ns}-button:not(:last-child) {
        margin-bottom: $button-border-width;
      }
    }
  }
}