// Name:            Tab
// Description:     Component to create a tabbed navigation
//
// Component:       `uk-tab`
//
// Modifiers:       `uk-tab-bottom`
//                  `uk-tab-left`
//                  `uk-tab-right`
//
// States:          `uk-active`
//                  `uk-disabled`
//
// ========================================================================


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

@tab-margin-horizontal:                  20px;
@tab-margin-bottom:                      0px;

@tab-item-height:                        42px;
@tab-item-padding-horizontal:            @global-margin;
@tab-item-padding-vertical:              0;
@tab-item-color:                         #8391a5;
@tab-item-hover-color:                   #1f2d3d;
@tab-item-hover-dark-color:              #ddd;
@tab-item-hover-text-decoration:         none;
@tab-item-active-color:                  #20a0ff;
@tab-item-active-dark-color:             #5eaeff;
@tab-item-disabled-color:                #8391a5;

@tab-border:                             @global-border;
@tab-dark-border:                        @global-dark-border;

@tab-item-border-width:                  3px;

@tab-item-active-border:                 @tab-item-active-color;
@tab-item-active-dark-border:            @tab-item-active-dark-color;

/* ========================================================================
   Component: Tab
 ========================================================================== */

/*
 * 1. Allow items to wrap into the next line
 * 2. Gutter
 * 3. Reset lists
 */

.uk-tab {
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    /* 1 */
    -ms-flex-wrap: wrap;
    -webkit-flex-wrap: wrap;
    flex-wrap: wrap;
    /* 2 */
    margin: 0;
    margin-left: -@tab-margin-horizontal;
    margin-bottom: @tab-margin-bottom;
    /* 3 */
    padding: 0;
    list-style: none;

    &:before {
        content: none;
    }
    .hook-tab;
}

/*
 * 1. Space is allocated solely based on content dimensions: 0 0 auto
 * 2. Gutter
 * 3. Create position context for dropdowns
 */

.uk-tab > * {
    /* 1 */
    -ms-flex: none;
    -webkit-flex: none;
    flex: none;
    /* 2 */
    padding-left: @tab-margin-horizontal;
    /* 3 */
    position: relative;
}


/* Items
 ========================================================================== */

/*
 * Items must target `a` elements to exclude other elements (e.g. dropdowns)
 * 1. Center text if a width is set
 * 2. Style
 */

.uk-tab > * > a {
    display: block;
    box-sizing: border-box;
    /* 1 */
    text-align: center;
    /* 2 */
    padding: @tab-item-padding-vertical @tab-item-padding-horizontal;
    color: @tab-item-color;
    .hook-tab-item;
}

/* Hover + Focus */
.uk-tab > * > a:hover,
.uk-tab > * > a:focus {
    color: @tab-item-hover-color;
    text-decoration: @tab-item-hover-text-decoration;
    .hook-tab-item-hover;
}

/* Active */
.uk-tab > .uk-active > a {
    color: @tab-item-active-color;
    .hook-tab-item-active;
}

/* Disabled */
.uk-tab > .uk-disabled > a {
    color: @tab-item-disabled-color;
    .hook-tab-item-disabled;
}


/* Position modifier
 ========================================================================== */

/*
 * Bottom
 */

.uk-tab-bottom {
    .hook-tab-bottom;
}

.uk-tab-bottom > * > a {
    .hook-tab-bottom-item;
}

/*
 * Left + Right
 * 1. Reset Gutter
 */

.uk-tab-left,
.uk-tab-right {
    -ms-flex-direction: column;
    -webkit-flex-direction: column;
    flex-direction: column;
    /* 1 */
    margin-left: 0;
}

/* 1 */
.uk-tab-left > *,
.uk-tab-right > * { padding-left: 0; }

.uk-tab-left {
    .hook-tab-left;
}

.uk-tab-right {
    .hook-tab-right;
}

.uk-tab-left > * > a {
    text-align: right;
    .hook-tab-left-item;
}

.uk-tab-right > * > a {
    text-align: left;
    .hook-tab-right-item;
}


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

.hook-tab-misc;

.hook-tab() {}
.hook-tab-item() {
    height: @tab-item-height;
    line-height: @tab-item-height;
}
.hook-tab-item-hover() {
    .dark & {
        color: @tab-item-hover-dark-color;
    }
}
.hook-tab-item-active() {
    .dark & {
        color: @tab-item-active-dark-color;
    }
}
.hook-tab-item-disabled() {}
.hook-tab-bottom() {}
.hook-tab-bottom-item() {}
.hook-tab-left() {}
.hook-tab-left-item() {}
.hook-tab-right() {}
.hook-tab-right-item() {}
.hook-tab-misc() {}

// Component
// ========================================================================

.hook-tab() {

    position: relative;

    &::before {
        content: "";
        position: absolute;
        bottom: 0;
        left: @tab-margin-horizontal;
        right: 0;
        border-bottom: 1px solid @tab-border;

        .dark & {
            border-color: @tab-dark-border;
        }
    }

}


// Items
// ========================================================================

.hook-tab-item() {
    border-bottom: @tab-item-border-width solid transparent;
    -webkit-transition: color 0.1s ease-in-out;
    transition: color 0.1s ease-in-out;
}

.hook-tab-item-hover() {}

.hook-tab-item-active() {
    border-color: @tab-item-active-border;
    .dark & {
        border-color: @tab-item-active-dark-border;
    }
}

.hook-tab-item-disabled() {}


// Position modifiers
// ========================================================================

.hook-tab-bottom() {

    &::before {
        top: 0;
        bottom: auto;
    }

}

.hook-tab-bottom-item() {
    border-top: @tab-item-border-width solid transparent;
    border-bottom: none;
}

.hook-tab-left() {

    &::before {
        top: 0;
        bottom: 0;
        left: auto;
        right: 0;
        border-left: 1px solid @tab-border;
        border-bottom: none;

        .dark & {
            border-color: @tab-dark-border;
        }
    }

}

.hook-tab-left-item() {
    border-right: @tab-item-border-width solid transparent;
    border-bottom: none;
    box-sizing: border-box;
}

.hook-tab-right() {

    &::before {
        top: 0;
        bottom: 0;
        left: 0;
        right: auto;
        border-left: 1px solid @tab-border;
        border-bottom: none;

        .dark & {
            border-color: @tab-dark-border;
        }
    }

}

.hook-tab-right-item() {
    border-left: @tab-item-border-width solid transparent;
    border-bottom: none;
}


// Miscellaneous
// ========================================================================

.hook-tab-misc() {

    .uk-tab .uk-dropdown { margin-left: (@tab-margin-horizontal + @tab-item-padding-horizontal) }

}