//
// 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.
//

@import '../../globals/scss/functions';
@import '../../globals/scss/helper-classes';
@import '../../globals/scss/helper-mixins';
@import '../../globals/scss/layout';
@import '../../globals/scss/vars';
@import '../../globals/scss/typography';
@import 'theme';
@import 'functions';

@mixin carbon-header {
  .#{$prefix}--header {
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: mini-units(6);
    background-color: $shell-header-bg-01;
    color: $shell-header-text-01;
    z-index: z('header');
  }

  .#{$prefix}--header__action {
    @include button-reset();
    width: mini-units(6);
    height: mini-units(6);
    border: rem(3px) solid transparent;
  }

  .#{$prefix}--header__action > svg.#{$prefix}--navigation-menu-panel-collapse-icon,
  .#{$prefix}--header__action--active > svg.#{$prefix}--navigation-menu-panel-expand-icon {
    display: none;
  }

  .#{$prefix}--header__action--active > svg.#{$prefix}--navigation-menu-panel-collapse-icon {
    display: inline;
  }

  .#{$prefix}--header__action > svg.#{$prefix}--navigation-menu-panel-collapse-icon,
  .#{$prefix}--header__action--active > svg.#{$prefix}--navigation-menu-panel-expand-icon {
    display: none;
  }

  .#{$prefix}--header__action--active > svg.#{$prefix}--navigation-menu-panel-collapse-icon {
    display: inline;
  }

  .#{$prefix}--header__action:hover {
    background-color: #333333;
  }

  .#{$prefix}--header__action--active,
  .#{$prefix}--header__action--active:hover {
    background-color: $shell-brand-01;
  }

  .#{$prefix}--header__action--active,
  .#{$prefix}--header__action:focus {
    border-color: $shell-brand-01;
    outline: none;
  }

  .#{$prefix}--header__action > svg {
    fill: $shell-header-icon-01;
  }

  //--------------------------------------------------------------------------
  // Header - Name
  //--------------------------------------------------------------------------
  a.#{$prefix}--header__name {
    @include type-style('body-short-01');
    display: flex;
    align-items: center;
    height: 100%;
    padding: 0 mini-units(2);
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 0.1px;
    line-height: 20px;
    user-select: none;
  }

  .#{$prefix}--header__name--prefix {
    font-weight: 400;
  }

  a.#{$prefix}--header__name,
  a.#{$prefix}--header__name:hover {
    color: $shell-header-text-01;
  }

  a.#{$prefix}--header__name:focus {
    outline: none;
    box-shadow: inset 0 0 0 4px $shell-brand-01;
  }

  //--------------------------------------------------------------------------
  // Header - Navigation
  //--------------------------------------------------------------------------
  .#{$prefix}--header__nav {
    height: 100%;
  }

  .#{$prefix}--header__menu-bar[role='menubar'] {
    display: flex;
    margin-left: mini-units(1);
    height: 100%;
  }

  a.#{$prefix}--header__menu-item[role='menuitem'] {
    display: flex;
    align-items: center;
    color: $shell-header-text-01;
    padding: 0 mini-units(2);
    // Used for links that are directly in the menubar to span the full height
    height: 100%;
    // Text styles
    font-size: rem(14px);
    font-weight: 400;
    letter-spacing: 0;
    line-height: rem(18px);
    // Reset link styles and make sure the text isn't selectable
    text-decoration: none;
    user-select: none;
    // Used for focus styles
    border: 4px solid transparent;
  }

  a.#{$prefix}--header__menu-item[role='menuitem']:hover {
    background-color: #333333;
  }

  .#{$prefix}--header__action:active,
  a.#{$prefix}--header__menu-item[role='menuitem']:active {
    background-color: $ibm-color__gray-80;
  }

  a.#{$prefix}--header__menu-item[role='menuitem']:focus {
    border-color: $ibm-color__blue-60;
    outline: none;
  }

  .#{$prefix}--header__submenu {
    position: relative;
  }

  .#{$prefix}--header__menu-title[role='menuitem'][aria-haspopup='true'] {
    position: relative;
  }

  .#{$prefix}--header__menu-title[role='menuitem'][aria-expanded='true'] {
    background-color: $ibm-color__gray-80;
    // Note: needs to be higher than menu. Adding 1 here instead of moving to
    // the next level.
    z-index: #{z('header') + 1};
  }

  .#{$prefix}--header__menu-title[role='menuitem'][aria-expanded='true'] > .#{$prefix}--header__menu-arrow {
    transform: rotate(180deg);
  }

  .#{$prefix}--header__menu[role='menu'] {
    display: none;
  }

  .#{$prefix}--header__menu-title[role='menuitem'][aria-expanded='true'] + .#{$prefix}--header__menu {
    position: absolute;
    bottom: 0;
    left: 0;
    display: flex;
    width: mini-units(25);
    flex-direction: column;
    transform: translateY(100%);
    background-color: $ibm-color__gray-80;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.5);
    z-index: z('header');
  }

  .#{$prefix}--header__menu .#{$prefix}--header__menu-item[role='menuitem'] {
    height: mini-units(6);
  }

  .#{$prefix}--header__menu .#{$prefix}--header__menu-item[role='menuitem']:hover {
    background-color: #4c4c4c;
    color: #fff;
  }

  .#{$prefix}--header__menu-arrow {
    fill: $ibm-color__gray-10;
    margin-left: mini-units(1);
  }

  //--------------------------------------------------------------------------
  // Header - Global
  //--------------------------------------------------------------------------
  .#{$prefix}--header__global {
    display: flex;
    justify-content: flex-end;
    flex: 1 1 0%;
    height: 100%;
  }

  //--------------------------------------------------------------------------
  // Header - Skip to content
  //--------------------------------------------------------------------------
  .#{$prefix}--skip-to-content {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
    visibility: visible;
    white-space: nowrap;
  }

  .#{$prefix}--skip-to-content:focus {
    display: flex;
    align-items: center;
    top: 0;
    left: 0;
    width: auto;
    height: 3rem;
    clip: auto;
    border: 4px solid $ibm-color__blue-60;
    z-index: 9999;
    background-color: $shell-header-bg-01;
    color: $shell-header-text-01;
    outline: none;
    padding: 0 1rem;
  }
}

@include exports('carbon-header') {
  @if feature-flag-enabled('ui-shell') {
    @include carbon-header;
  }
}