$sidebar-width: 50px;
$sidebar-tab-width: 40px;
$sidebar-peek-width: 15px;
$open-drawer-width: 370px;
$sidebar-tab-bg-color: #eff0f6;
$sidebar-shadow: -1px 0 2px rgba(0, 0, 0, 0.2);
$sidebar-z-index: 1050;
$border-color: #e5e5e5;
$hover-text-color: #fff;
$text-color: #fff;
$transition-speed: 0.3s;

// Mobile variables
$mobile-sidebar-width: 40px;
$mobile-sidebar-peek-width: 10px;

.snap-sidebar-menu {
    position: fixed;
    top: 0;
    right: -($sidebar-width - $sidebar-peek-width);
    width: $sidebar-width;
    height: 100%;
    z-index: $sidebar-z-index;
    transition: 
        right $transition-speed ease,
        top $transition-speed ease, 
        height $transition-speed ease,
        background-color $transition-speed ease;
    overflow: visible;
    box-shadow: -2px 0 5px rgba(0, 0, 0, 0.1);
    
    &::before {
        content: '';
        position: absolute;
        top: 15px;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        height: 3px;
        background-color: #fff;
        border-radius: 3px;
        z-index: $sidebar-z-index + 1;
        opacity: 0;
        transition: width $transition-speed ease, opacity $transition-speed ease;
    }
    
    &.show {
        right: 0;
                
        &::before {
            width: 40px;
            opacity: 1;
        }
    }
}

.snap-sidebar-menu-content {
    position: absolute;
    top: 0;
    right: 0;
    width: $sidebar-width;
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 30px 0 15px;
    align-items: center;
    justify-content: flex-start;
    overflow-y: auto;
    overflow-x: hidden;
    transform: translateX($sidebar-peek-width);
    transition: transform $transition-speed ease;
    
    .snap-sidebar-menu.show & {
        transform: translateX(0);
    }
    
    // Force white color for all links and icons inside the content area
    a, i, .fa {
        color: #fff !important;
    }
    
    // Force white color for custom content
    .custom-menu-item {
        color: #fff !important;
        
        a, i, .fa {
            color: #fff !important;
            &:focus {
                outline: none;
                box-shadow: none;
            }
        }

        [id^="message-drawer-toggle-"] {
            &:focus {
                outline: 3px solid white;
                border-radius: 0.5rem;
                width: 37px;
                padding: .3em;
            }
        }
    }
}

.snap-sidebar-menu-trigger {
    position: absolute;
    bottom: 30px;
    left: -12px;
    width: 24px;
    height: 24px;
    background-color: #ccc;
    border: 2px solid #fff;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: $sidebar-z-index + 1; // Ensure button is above sidebar

    &:hover {
        background-color: #9d9d9d;
    }

    i {
        font-size: 0.8rem;
        transition: transform $transition-speed ease;
        color: black !important;
        
        &.rotate-180 {
            transform: rotate(180deg);
        }
    }
}

.snap-sidebar-menu-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin-bottom: 10px;
    color: #fff !important; // Force white color
    text-decoration: none;
    border-radius: 50%;
    transition: background-color $transition-speed ease, color $transition-speed ease;
    position: relative; // For positioning custom content
    background-color: transparent; // For buttons
    border: none; // For buttons
    padding: 0; // For buttons
    cursor: pointer; // For buttons
    
    &:hover {
        color: #fff !important; // Force white color on hover
    }
        
    i, .fa {
        font-size: 1.2rem;
        color: #fff !important; // Force white color for icons
        display: flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: 100%;
    }
    
    // Style for image icons
    img {
        filter: brightness(0) invert(1); // Make the icon white
    }
}

.custom-menu-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin-bottom: 10px;
    color: #fff !important; // Force white color
    
    a, i, .fa {
        color: #fff !important; // Force white color for all elements
    }
}

// Active state for drawer buttons
.snap-sidebar-menu-item.active {
    position: relative;
    
    &::after {
        content: '';
        position: absolute;
        bottom: -5px;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 3px;
        background-color: #fff;
        border-radius: 3px;
        opacity: 1;
        transition: width 0.3s ease, opacity 0.3s ease;
    }
    
    &:hover {        
        &::after {
            width: 35px;
        }
    }
}

// Animation for the active indicator
.snap-sidebar-menu-item {
    position: relative;
    
    &::after {
        content: '';
        position: absolute;
        bottom: -5px;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        height: 3px;
        background-color: #fff;
        border-radius: 3px;
        opacity: 0;
        transition: width 0.3s ease, opacity 0.3s ease;
    }
    
    &.active::after {
        width: 30px;
        opacity: 1;
    }
}

// Remove background hover effect for active items
.snap-sidebar-menu-item.active:hover {
    background-color: transparent;
}

@media screen and (max-width: 992px) {
    .snap-sidebar-menu {
        width: $mobile-sidebar-width;
        right: -($mobile-sidebar-width - $mobile-sidebar-peek-width);
    }

    .snap-sidebar-menu-content {
        width: $mobile-sidebar-width;
    }
}

.snap-sidebar-menu.positioning-offscreen {
    right: -200px;
}

// ---------------------------------------
// External overrides/adaptations
// ---------------------------------------

#page-content .block_settings.state-visible,
.block_settings:target {
    right: $sidebar-width;
    @media screen and (max-width: 992px) {
        right: $mobile-sidebar-width;
    }
}

.drawer.drawer-right.show {
    right: $sidebar-width;
    @media screen and (max-width: 992px) {
        right: $mobile-sidebar-width;
    }
    
    // Add z-index when dropdown menu is visible to not hide it.
    body:has(.dropdown-menu.dropdown-menu-right.show) & {
        z-index: 22; // For some reason this z-index works
    }
}

#snap_feeds_side_menu.state-visible {
    right: $sidebar-width;
    @media screen and (max-width: 992px) {
        right: $mobile-sidebar-width;
    }
    @media screen and (max-width: 425px) {
        width: calc(100% - #{$mobile-sidebar-width});
    }
}

[data-region=right-hand-drawer].drawer {
    margin-right: $sidebar-width;
    @media screen and (max-width: 992px) {
        margin-right: $mobile-sidebar-width;
    }
}

[data-region="popover-region-messages"] {
    .count-container {
        right: 10px;
    }

    a {
        &::before,
        &::after {
            content: none;
        }
    }
}

.snap-sidebar-menu {
    &.show {
        & ~ #page {
            margin-right: $sidebar-width;
            @media screen and (max-width: 992px) {
                margin-right: $mobile-sidebar-width;
            }
        }
    }
}


#mr-nav {
    &.headroom--unpinned {
        & ~ .snap-sidebar-menu {
            top: 0 !important;
            height: 100vh !important;
        }
    }
}

#goto-top-link {
    bottom: 6em;
    right: $sidebar-width;

    @media (max-width: 991px) {
        right: $mobile-sidebar-width;
    }
    
    a.btn {
        border-radius: 1.5rem 0 0 1.5rem;
        width: 2rem;
    }
}

footer#moodle-footer {
    margin-right: $sidebar-width;
    @media (max-width: 991px) {
        margin-right: $mobile-sidebar-width;
    }
}

// Adjust sticky footer to Sidebar.
body:has(.snap-sidebar-menu.show) #sticky-footer {
    margin-right: $sidebar-width;
    @media screen and (max-width: 992px) {
        margin-right: $mobile-sidebar-width;
    }

    // Adjust sticky footer to open Drawer.
    @media screen and (min-width: 992px) {
        &.snap-mod-data-sticky-footer {
            margin-right: $open-drawer-width;
        }
    }
}

// TOC Mobile Toggle
.mobile-only-toc-toggle {
    display: none;
    
    @media screen and (max-width: 767px) {
        display: block;
    }
}

// Styles to handle the special quiz and book behavior for the sidebar displaying the blocks.
#page-mod-quiz-attempt #page,
#page-mod-book-view #page {
    width: calc(100% - 50px);

    &.show-drawer-right {
        left: 0;
        width: calc(100% - 315px - 50px);
    }
}

// Styles for drawer in mobile resolutions.
@mixin display-drawer-mobile {
    #mr-nav {
        will-change: transform;
        animation-name: snap-rise;
        animation-timing-function: ease-in-out;
        animation-duration: 0.4s;
        animation-fill-mode: forwards;
    }
    .snap-sidebar-menu {
        top: 0 !important;
        height: 100vh !important;
    }
    .block_settings.state-visible,
    .snap-drawer-headroom:not(.hidden),
    #theme_snap-drawers-blocks.show,
    #snap_feeds_side_menu.state-visible {
        top: 0 !important;
        right: 0 !important;
        height: 100vh !important;
        width: 100vw !important;
        max-height: 100vh !important;
        max-width: unset !important;
        margin-right: 0 !important;
        z-index: $sidebar-z-index + 5 !important;
    }
}

// This allow us to test this on Behat sites.
@media screen and (max-width: 600px) {
    body.snap_drawer_open.behat-site {
        @include display-drawer-mobile;
    }
}

@media screen and (max-width: 425px) {
    body.snap_drawer_open {
        @include display-drawer-mobile;
    }
}
