// Name:            Navbar
// Description:     Component to create horizontal navigation bars
//
// Component:       `uk-navbar`
//
// Sub-objects:     `uk-navbar-container`
//                  `uk-navbar-left`
//                  `uk-navbar-right`
//                  `uk-navbar-center`
//                  `uk-navbar-center-left`
//                  `uk-navbar-center-right`
//                  `uk-navbar-nav`
//                  `uk-navbar-parent-icon`
//                  `uk-navbar-item`
//                  `uk-navbar-toggle`
//                  `uk-navbar-subtitle`
//                  `uk-navbar-dropbar`
//
// Adopted:         `uk-navbar-dropdown` + Modifiers
//                  `uk-navbar-dropdown-nav`
//                  `uk-navbar-toggle-icon`
//
// Modifiers:       `uk-navbar-primary`
//                  `uk-navbar-transparent`
//                  `uk-navbar-sticky`
//
// States:          `uk-active`
//                  `uk-parent`
//                  `uk-open`
//
// ========================================================================


// Variables
// ========================================================================

@navbar-background:                             @global-muted-background;
@navbar-gap:                                    0px; // Must have a unit because of `calc`
@navbar-color-mode:                             dark;

@navbar-nav-gap:                                0px; // Must have a unit because of `calc`

@navbar-nav-item-height:                        80px;
@navbar-nav-item-padding-horizontal:            15px;
@navbar-nav-item-color:                         @global-muted-color;
@navbar-nav-item-font-size:                     @global-font-size;
@navbar-nav-item-font-family:                   @global-font-family;
@navbar-nav-item-hover-color:                   @global-color;
@navbar-nav-item-onclick-color:                 @global-emphasis-color;
@navbar-nav-item-active-color:                  @global-emphasis-color;

@navbar-parent-icon-margin-left:                4px;

@navbar-item-padding-horizontal:                15px;
@navbar-item-color:                             @global-color;

@navbar-toggle-color:                           @global-muted-color;
@navbar-toggle-hover-color:                     @global-color;

@navbar-subtitle-font-size:                     @global-small-font-size;

@navbar-dropdown-margin:                        0;
@navbar-dropdown-shift-margin:                  0;
@navbar-dropdown-viewport-margin:               15px;
@navbar-dropdown-width:                         200px;
@navbar-dropdown-padding:                       15px;
@navbar-dropdown-background:                    @global-muted-background;
@navbar-dropdown-color:                         @global-color;
@navbar-dropdown-color-mode:                    dark;
@navbar-dropdown-focus-outline:                 @base-focus-outline;
@navbar-dropdown-grid-gutter-horizontal:        @global-gutter;
@navbar-dropdown-grid-gutter-vertical:          @navbar-dropdown-grid-gutter-horizontal;

@navbar-dropdown-large-shift-margin:            0;
@navbar-dropdown-large-padding:                 40px;

@navbar-dropdown-dropbar-margin:                0;
@navbar-dropdown-dropbar-shift-margin:          0;
@navbar-dropdown-dropbar-padding-top:           @navbar-dropdown-padding;
@navbar-dropdown-dropbar-padding-bottom:        @navbar-dropdown-dropbar-padding-top;
@navbar-dropdown-dropbar-viewport-margin:       15px;
@navbar-dropdown-dropbar-viewport-margin-s:     @global-gutter;
@navbar-dropdown-dropbar-viewport-margin-m:     @global-medium-gutter;

@navbar-dropdown-dropbar-large-shift-margin:    0;
@navbar-dropdown-dropbar-large-padding-top:     @navbar-dropdown-large-padding;
@navbar-dropdown-dropbar-large-padding-bottom:  @navbar-dropdown-dropbar-large-padding-top;

@navbar-dropdown-nav-item-color:                @global-muted-color;
@navbar-dropdown-nav-item-hover-color:          @global-color;
@navbar-dropdown-nav-item-active-color:         @global-emphasis-color;
@navbar-dropdown-nav-subtitle-font-size:        @global-small-font-size;
@navbar-dropdown-nav-header-color:              @global-emphasis-color;
@navbar-dropdown-nav-divider-border-width:      @global-border-width;
@navbar-dropdown-nav-divider-border:            @global-border;
@navbar-dropdown-nav-sublist-item-color:        @global-muted-color;
@navbar-dropdown-nav-sublist-item-hover-color:  @global-color;
@navbar-dropdown-nav-sublist-item-active-color: @global-emphasis-color;


/* ========================================================================
   Component: Navbar
 ========================================================================== */

/*
 * 1. Create position context to center navbar group
 */

.uk-navbar {
    display: flex;
    /* 1 */
    position: relative;
    .hook-navbar();
}


/* Container
 ========================================================================== */

.uk-navbar-container:not(.uk-navbar-transparent) {
    background: @navbar-background;
    .hook-navbar-container();
}

// Color Mode
.uk-navbar-container:not(.uk-navbar-transparent):extend(.uk-light all) when (@navbar-color-mode = light) {}
.uk-navbar-container:not(.uk-navbar-transparent):extend(.uk-dark all) when (@navbar-color-mode = dark) {}


/* Groups
 ========================================================================== */

/*
 * 1. Stretch height if a sibling's height is expanded by its content
 */

.uk-navbar-left,
.uk-navbar-right,
[class*="uk-navbar-center"] {
    display: flex;
    gap: @navbar-gap;
    /* 1 */
    align-items: stretch;
}

/*
 * Horizontal alignment
 * 1. Create position context for centered navbar with sub groups (left/right)
 * 2. Fix text wrapping if content is larger than 50% of the container.
 * 3. Needed for dropdowns because a new position context is created
 *    `z-index` must be smaller than off-canvas
 * 4. Stretch height if a sibling's height is expanded by its content
 * 5. Align sub groups for centered navbar
 */

.uk-navbar-right { margin-left: auto; }

.uk-navbar-center:only-child {
    margin-left: auto;
    margin-right: auto;
    /* 1 */
    position: relative;
}

.uk-navbar-center:not(:only-child) {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    /* 2 */
    width: max-content;
    box-sizing: border-box;
    /* 3 */
    z-index: @global-z-index - 10;
    /* 4 */
    height: 100%;
    align-items: stretch;
}

.uk-navbar-center-left,
.uk-navbar-center-right {
    /* 4 */
    height: 100%;
    /* 5 */
    position: absolute;
    top: 0;
}

.uk-navbar-center-left { right: ~'calc(100% + @{navbar-gap})'; }
.uk-navbar-center-right { left: ~'calc(100% + @{navbar-gap})'; }

[class*="uk-navbar-center-"] {
    width: max-content;
    box-sizing: border-box;
}


/* Nav
 ========================================================================== */

/*
 * 1. Stretch height if a sibling's height is expanded by its content
 * 2. Reset list
 */

.uk-navbar-nav {
    display: flex;
    gap: @navbar-nav-gap;
    /* 1 */
    align-items: stretch;
    /* 2 */
    margin: 0;
    padding: 0;
    list-style: none;
}

/*
 * Allow items to wrap into the next line
 * Only not `absolute` positioned groups
 */

.uk-navbar-left,
.uk-navbar-right,
.uk-navbar-center:only-child { flex-wrap: wrap; }

/*
 * Items
 * 1. Center content vertically and horizontally
 * 2. Imitate white space gap when using flexbox
 * 3. Dimensions
 * 4. Style
 * 5. Required for `a`
 */

.uk-navbar-nav > li > a,    // Nav item
.uk-navbar-item,            // Content item
.uk-navbar-toggle {         // Clickable item
    /* 1 */
    display: flex;
    justify-content: center;
    align-items: center;
    /* 2 */
    column-gap: 0.25em;
    /* 3 */
    box-sizing: border-box;
    min-height: @navbar-nav-item-height;
    /* 4 */
    font-size: @navbar-nav-item-font-size;
    font-family: @navbar-nav-item-font-family;
    /* 5 */
    text-decoration: none;
}

/*
 * Nav items
 * 1. Stretch height if a sibling's height is expanded by its content
 * 2. Reset list
 */

.uk-navbar-nav > li > a {
    /* 1 */
    height: 100%;
    /* 2 */
    padding: 0 @navbar-nav-item-padding-horizontal;
    color: @navbar-nav-item-color;
    .hook-navbar-nav-item();
}

/*
 * Hover
 * Apply hover style also if dropdown is opened
 */

.uk-navbar-nav > li:hover > a,
.uk-navbar-nav > li > a[aria-expanded="true"] {
    color: @navbar-nav-item-hover-color;
    .hook-navbar-nav-item-hover();
}

/* OnClick */
.uk-navbar-nav > li > a:active {
    color: @navbar-nav-item-onclick-color;
    .hook-navbar-nav-item-onclick();
}

/* Active */
.uk-navbar-nav > li.uk-active > a {
    color: @navbar-nav-item-active-color;
    .hook-navbar-nav-item-active();
}


/* Parent icon modifier
 ========================================================================== */

.uk-navbar-parent-icon {
    margin-left: @navbar-parent-icon-margin-left;
    transition: transform 0.3s ease-out;
}

.uk-navbar-nav > li > a[aria-expanded="true"] .uk-navbar-parent-icon { transform: rotateX(180deg); }


/* Item
 ========================================================================== */

.uk-navbar-item {
    padding: 0 @navbar-item-padding-horizontal;
    color: @navbar-item-color;
    .hook-navbar-item();
}

/*
 * Remove margin from the last-child
 */

.uk-navbar-item > :last-child { margin-bottom: 0; }


/* Toggle
 ========================================================================== */

.uk-navbar-toggle {
    padding: 0 @navbar-item-padding-horizontal;
    color: @navbar-toggle-color;
    .hook-navbar-toggle();
}

.uk-navbar-toggle:hover,
.uk-navbar-toggle[aria-expanded="true"] {
    color: @navbar-toggle-hover-color;
    text-decoration: none;
    .hook-navbar-toggle-hover();
}

/*
 * Icon
 * Adopts `uk-icon`
 */

.uk-navbar-toggle-icon {
    .hook-navbar-toggle-icon();
}

/* Hover */
:hover > .uk-navbar-toggle-icon {
    .hook-navbar-toggle-icon-hover();
}


/* Subtitle
 ========================================================================== */

.uk-navbar-subtitle {
    font-size: @navbar-subtitle-font-size;
    .hook-navbar-subtitle();
}


/* Justify modifier
 ========================================================================== */

.uk-navbar-justify .uk-navbar-left,
.uk-navbar-justify .uk-navbar-right,
.uk-navbar-justify .uk-navbar-nav,
.uk-navbar-justify .uk-navbar-nav > li,        // Nav item
.uk-navbar-justify .uk-navbar-item,            // Content item
.uk-navbar-justify .uk-navbar-toggle { flex-grow: 1; }


/* Style modifiers
 ========================================================================== */

.uk-navbar-primary {
    .hook-navbar-primary();
}

.uk-navbar-transparent {
    .hook-navbar-transparent();
}

.uk-navbar-sticky {
    .hook-navbar-sticky();
}


/* Dropdown
 ========================================================================== */

/*
 * Adopts `uk-drop`
 * 1. Set a default width
 * 2. Style
 */

.uk-navbar-dropdown {
    --uk-position-offset: @navbar-dropdown-margin;
    --uk-position-shift-offset: @navbar-dropdown-shift-margin;
    --uk-position-viewport-offset: @navbar-dropdown-viewport-margin;
    --uk-inverse: @navbar-dropdown-color-mode;
    /* 1 */
    width: @navbar-dropdown-width;
    /* 2 */
    padding: @navbar-dropdown-padding;
    background: @navbar-dropdown-background;
    color: @navbar-dropdown-color;
    .hook-navbar-dropdown();
}

/*
 * Remove margin from the last-child
 */

.uk-navbar-dropdown > :last-child { margin-bottom: 0; }

// Color Mode
.uk-navbar-dropdown:not(.uk-preserve-color):extend(.uk-light all) when (@navbar-dropdown-color-mode = light) {}
.uk-navbar-dropdown:not(.uk-preserve-color):extend(.uk-dark all) when (@navbar-dropdown-color-mode = dark) {}

.uk-navbar-dropdown :focus-visible when not (@navbar-dropdown-color-mode = @inverse-global-color-mode) {
    outline-color: @navbar-dropdown-focus-outline !important;
}

/*
 * Grid
 * Adopts `uk-grid`
 */

/* Gutter Horizontal */
.uk-navbar-dropdown .uk-drop-grid { margin-left: -@navbar-dropdown-grid-gutter-horizontal; }
.uk-navbar-dropdown .uk-drop-grid > * { padding-left: @navbar-dropdown-grid-gutter-horizontal; }

/* Gutter Vertical */
.uk-navbar-dropdown .uk-drop-grid > .uk-grid-margin { margin-top: @navbar-dropdown-grid-gutter-vertical; }

/*
 * Width modifier
 */

.uk-navbar-dropdown-width-2:not(.uk-drop-stack) { width: (@navbar-dropdown-width * 2); }
.uk-navbar-dropdown-width-3:not(.uk-drop-stack) { width: (@navbar-dropdown-width * 3); }
.uk-navbar-dropdown-width-4:not(.uk-drop-stack) { width: (@navbar-dropdown-width * 4); }
.uk-navbar-dropdown-width-5:not(.uk-drop-stack) { width: (@navbar-dropdown-width * 5); }

/*
 * Size modifier
 */

.uk-navbar-dropdown-large {
    --uk-position-shift-offset: @navbar-dropdown-large-shift-margin;
    padding: @navbar-dropdown-large-padding;
    .hook-navbar-dropdown-large();
}

/*
 * Dropbar modifier
 * 1. Reset dropdown width to prevent to early shifting
 * 2. Reset style
 * 3. Padding
 */

.uk-navbar-dropdown-dropbar {
    /* 1 */
    width: auto;
    /* 2 */
    background: transparent;
    /* 3 */
    padding: @navbar-dropdown-dropbar-padding-top 0 @navbar-dropdown-dropbar-padding-bottom 0;
    --uk-position-offset: @navbar-dropdown-dropbar-margin;
    --uk-position-shift-offset: @navbar-dropdown-dropbar-shift-margin;
    --uk-position-viewport-offset: @navbar-dropdown-dropbar-viewport-margin;
    .hook-navbar-dropdown-dropbar();
}

/* Phone landscape and bigger */
@media (min-width: @breakpoint-small) {

    .uk-navbar-dropdown-dropbar { --uk-position-viewport-offset: @navbar-dropdown-dropbar-viewport-margin-s; }

}

/* Tablet landscape and bigger */
@media (min-width: @breakpoint-medium) {

    .uk-navbar-dropdown-dropbar { --uk-position-viewport-offset: @navbar-dropdown-dropbar-viewport-margin-m; }

}

.uk-navbar-dropdown-dropbar-large {
    --uk-position-shift-offset: @navbar-dropdown-dropbar-large-shift-margin;
    padding-top: @navbar-dropdown-dropbar-large-padding-top;
    padding-bottom: @navbar-dropdown-dropbar-large-padding-bottom;
    .hook-navbar-dropdown-dropbar-large();
}


/* Dropdown Nav
 * Adopts `uk-nav`
 ========================================================================== */

.uk-navbar-dropdown-nav {
    .hook-navbar-dropdown-nav();
}

/*
 * Items
 */

.uk-navbar-dropdown-nav > li > a {
    color: @navbar-dropdown-nav-item-color;
    .hook-navbar-dropdown-nav-item();
}

/* Hover */
.uk-navbar-dropdown-nav > li > a:hover {
    color: @navbar-dropdown-nav-item-hover-color;
    .hook-navbar-dropdown-nav-item-hover();
}

/* Active */
.uk-navbar-dropdown-nav > li.uk-active > a {
    color: @navbar-dropdown-nav-item-active-color;
    .hook-navbar-dropdown-nav-item-active();
}

/*
 * Subtitle
 */

.uk-navbar-dropdown-nav .uk-nav-subtitle {
    font-size: @navbar-dropdown-nav-subtitle-font-size;
    .hook-navbar-dropdown-nav-subtitle();
}

/*
 * Header
 */

.uk-navbar-dropdown-nav .uk-nav-header {
    color: @navbar-dropdown-nav-header-color;
    .hook-navbar-dropdown-nav-header();
}

/*
 * Divider
 */

.uk-navbar-dropdown-nav .uk-nav-divider {
    border-top: @navbar-dropdown-nav-divider-border-width solid @navbar-dropdown-nav-divider-border;
    .hook-navbar-dropdown-nav-divider();
}

/*
 * Sublists
 */

.uk-navbar-dropdown-nav .uk-nav-sub a { color: @navbar-dropdown-nav-sublist-item-color; }

.uk-navbar-dropdown-nav .uk-nav-sub a:hover { color: @navbar-dropdown-nav-sublist-item-hover-color; }

.uk-navbar-dropdown-nav .uk-nav-sub li.uk-active > a { color: @navbar-dropdown-nav-sublist-item-active-color; }


/* Dropbar
 ========================================================================== */

/*
 * Adopts `uk-dropnav-dropbar`
 */

.uk-navbar-dropbar {
    .hook-navbar-dropbar();
}


// Hooks
// ========================================================================

.hook-navbar-misc();

.hook-navbar() {}
.hook-navbar-container() {}
.hook-navbar-nav-item() {}
.hook-navbar-nav-item-hover() {}
.hook-navbar-nav-item-onclick() {}
.hook-navbar-nav-item-active() {}
.hook-navbar-item() {}
.hook-navbar-toggle() {}
.hook-navbar-toggle-hover() {}
.hook-navbar-toggle-icon() {}
.hook-navbar-toggle-icon-hover() {}
.hook-navbar-subtitle() {}
.hook-navbar-primary() {}
.hook-navbar-transparent() {}
.hook-navbar-sticky() {}
.hook-navbar-dropdown() {}
.hook-navbar-dropdown-large() {}
.hook-navbar-dropdown-dropbar() {}
.hook-navbar-dropdown-dropbar-large() {}
.hook-navbar-dropdown-nav() {}
.hook-navbar-dropdown-nav-item() {}
.hook-navbar-dropdown-nav-item-hover() {}
.hook-navbar-dropdown-nav-item-active() {}
.hook-navbar-dropdown-nav-subtitle() {}
.hook-navbar-dropdown-nav-header() {}
.hook-navbar-dropdown-nav-divider() {}
.hook-navbar-dropbar() {}
.hook-navbar-misc() {}


// Inverse
// ========================================================================

@inverse-navbar-nav-item-color:                @inverse-global-muted-color;
@inverse-navbar-nav-item-hover-color:          @inverse-global-color;
@inverse-navbar-nav-item-onclick-color:        @inverse-global-emphasis-color;
@inverse-navbar-nav-item-active-color:         @inverse-global-emphasis-color;
@inverse-navbar-item-color:                    @inverse-global-color;
@inverse-navbar-toggle-color:                  @inverse-global-muted-color;
@inverse-navbar-toggle-hover-color:            @inverse-global-color;

.hook-inverse() {

    //
    // Nav Item
    //

    .uk-navbar-nav > li > a {
        color: @inverse-navbar-nav-item-color;
        .hook-inverse-navbar-nav-item();
    }

    .uk-navbar-nav > li:hover > a,
    .uk-navbar-nav > li > a[aria-expanded="true"] {
        color: @inverse-navbar-nav-item-hover-color;
        .hook-inverse-navbar-nav-item-hover();
    }

    .uk-navbar-nav > li > a:active {
        color: @inverse-navbar-nav-item-onclick-color;
        .hook-inverse-navbar-nav-item-onclick();
    }

    .uk-navbar-nav > li.uk-active > a {
        color: @inverse-navbar-nav-item-active-color;
        .hook-inverse-navbar-nav-item-active();
    }

    //
    // Item
    //

    .uk-navbar-item {
        color: @inverse-navbar-item-color;
        .hook-inverse-navbar-item();
    }

    //
    // Toggle
    //

    .uk-navbar-toggle {
        color: @inverse-navbar-toggle-color;
        .hook-inverse-navbar-toggle();
    }

    .uk-navbar-toggle:hover,
    .uk-navbar-toggle[aria-expanded="true"] {
        color: @inverse-navbar-toggle-hover-color;
        .hook-inverse-navbar-toggle-hover();
    }

}

.hook-inverse-navbar-nav-item() {}
.hook-inverse-navbar-nav-item-hover() {}
.hook-inverse-navbar-nav-item-onclick() {}
.hook-inverse-navbar-nav-item-active() {}
.hook-inverse-navbar-item() {}
.hook-inverse-navbar-toggle() {}
.hook-inverse-navbar-toggle-hover() {}