/* stylelint-disable no-descending-specificity */
/// Removes a specific item from a list.
/// @author Hugo Giraudel
/// @param {list} $list List.
/// @param {integer} $index Index.
/// @return {list} Updated list.
@function remove-nth($list, $index) {

    $result: null;

    @if type-of($index) != number {
        @warn "$index: #{quote($index)} is not a number for `remove-nth`.";
    } @else if $index == 0 {
        @warn "List index 0 must be a non-zero integer for `remove-nth`.";
    } @else if abs($index) > length($list) {
        @warn "List index is #{$index} but list is only #{length($list)} item long for `remove-nth`.";
    } @else {

        $result: ();
        $index: if($index < 0, length($list) + $index + 1, $index);

        @for $i from 1 through length($list) {

            @if $i != $index {
                $result: append($result, nth($list, $i));
            }

        }

    }

    @return $result;

}

/// Gets a value from a map.
/// @author Hugo Giraudel
/// @param {map} $map Map.
/// @param {string} $keys Key(s).
/// @return {string} Value.
@function val($map, $keys...) {

    @if nth($keys, 1) == null {
        $keys: remove-nth($keys, 1);
    }

    @each $key in $keys {
        $map: map-get($map, $key);
    }

    @return $map;

}

/// Gets a duration value.
/// @param {string} $keys Key(s).
/// @return {string} Value.
@function _duration($keys...) {
    @return val($duration, $keys...);
}

/// Gets a font value.
/// @param {string} $keys Key(s).
/// @return {string} Value.
@function _font($keys...) {
    @return val($font, $keys...);
}

/// Gets a misc value.
/// @param {string} $keys Key(s).
/// @return {string} Value.
@function _misc($keys...) {
    @return val($misc, $keys...);
}

/// Gets a palette value.
/// @param {string} $keys Key(s).
/// @return {string} Value.
@function _palette($keys...) {
    @return val($palette, $keys...);
}

/// Gets a size value.
/// @param {string} $keys Key(s).
/// @return {string} Value.
@function _size($keys...) {
    @return val($size, $keys...);
}
