// -----------------------------------------------------------------------------
// suffix constructor
// -----------------------------------------------------------------------------

/// Suffix namespace
$bem-suffix-namespace: '\\@' !default;

@function _suffix($suffixes...) {
    $selector: ();
    $namespace: if($bem-use-namespaces, $bem-suffix-namespace, '');

    // Checking if the suffix is being set within a state.
    // If so, disallow and throw an error.
    // @TODO Allow suffixes to be set within states

    @if map-has-key($_bem-current-context, state) and map-get($_bem-current-context, state) != null {
        @error 'Currently, suffixes cannot be set within states. Move the suffix declaration outside the state constructor.';
    }

    @each $suffix in $suffixes {
        @each $sel in & {

            // Checking if the selector is composed of 3 elements. If that's the case,
            // we're dealing with an element being modified by a block modifier.
            // In that case, we need to add the suffix to the block too.
            // @TODO Find a better way to deal with this situation.

                @if length($sel) == 3 {
                    $tmp: append((), nth($sel, 1) + '#{$namespace}#{$suffix}', space);
                    $tmp: append($tmp, nth($sel, 2), space);
                    $tmp: append($tmp, nth($sel, 3), space);
                    $sel: #{$tmp};
                }
            $s: $sel + '#{$namespace}#{$suffix}';
            $selector: append($selector, $s, 'comma');
        }
    }

    $set-current: set-current-context('suffix', $suffixes, $selector);

    @return $selector;
}

@mixin suffix($suffixes...) {

    @at-root #{_suffix($suffixes...)} {
      @content;
    }

    $unset-suffix: unset-current-context('suffix');
}