/* stylelint-disable no-descending-specificity */
// breakpoints.scss v1.0 | @ajlkn | MIT licensed */

// Vars.

/// Breakpoints.
/// @var {list}
$breakpoints: () !global;

// Mixins.

/// Sets breakpoints.
/// @param {map} $x Breakpoints.
@mixin breakpoints($x: ()) {
    $breakpoints: $x !global;
}

/// Wraps @content in a @media block targeting a specific orientation.
/// @param {string} $orientation Orientation.
@mixin orientation($orientation) {
    @media screen and (orientation: #{$orientation}) {
        @content;
    }
}

/// Wraps @content in a @media block using a given query.
/// @param {string} $query Query.
@mixin breakpoint($query: null) {

    $breakpoint: null;
    $op: null;
    $media: null;

    // Determine operator, breakpoint.

    // Greater than or equal.
    @if (str-slice($query, 0, 2) == '>=') {

        $op: 'gte';
        $breakpoint: str-slice($query, 3);

    }

        // Less than or equal.
    @else if (str-slice($query, 0, 2) == '<=') {

        $op: 'lte';
        $breakpoint: str-slice($query, 3);

    }

        // Greater than.
    @else if (str-slice($query, 0, 1) == '>') {

        $op: 'gt';
        $breakpoint: str-slice($query, 2);

    }

        // Less than.
    @else if (str-slice($query, 0, 1) == '<') {

        $op: 'lt';
        $breakpoint: str-slice($query, 2);

    }

        // Not.
    @else if (str-slice($query, 0, 1) == '!') {

        $op: 'not';
        $breakpoint: str-slice($query, 2);

    }

        // Equal.
    @else {

        $op: 'eq';
        $breakpoint: $query;

    }

    // Build media.
    @if ($breakpoint and map-has-key($breakpoints, $breakpoint)) {

        $a: map-get($breakpoints, $breakpoint);

        // Range.
        @if (type-of($a) == 'list') {

            $x: nth($a, 1);
            $y: nth($a, 2);

            // Max only.
            @if ($x == null) {

                // Greater than or equal (>= 0 / anything)
                @if ($op == 'gte') {
                    $media: 'screen';
                }

                    // Less than or equal (<= y)
                @else if ($op == 'lte') {
                    $media: 'screen and (max-width: ' + $y + ')';
                }

                    // Greater than (> y)
                @else if ($op == 'gt') {
                    $media: 'screen and (min-width: ' + ($y + 1) + ')';
                }

                    // Less than (< 0 / invalid)
                @else if ($op == 'lt') {
                    $media: 'screen and (max-width: -1px)';
                }

                    // Not (> y)
                @else if ($op == 'not') {
                    $media: 'screen and (min-width: ' + ($y + 1) + ')';
                }

                    // Equal (<= y)
                @else {
                    $media: 'screen and (max-width: ' + $y + ')';
                }

            }

                // Min only.
            @else if ($y == null) {

                // Greater than or equal (>= x)
                @if ($op == 'gte') {
                    $media: 'screen and (min-width: ' + $x + ')';
                }

                    // Less than or equal (<= inf / anything)
                @else if ($op == 'lte') {
                    $media: 'screen';
                }

                    // Greater than (> inf / invalid)
                @else if ($op == 'gt') {
                    $media: 'screen and (max-width: -1px)';
                }

                    // Less than (< x)
                @else if ($op == 'lt') {
                    $media: 'screen and (max-width: ' + ($x - 1) + ')';
                }

                    // Not (< x)
                @else if ($op == 'not') {
                    $media: 'screen and (max-width: ' + ($x - 1) + ')';
                }

                    // Equal (>= x)
                @else {
                    $media: 'screen and (min-width: ' + $x + ')';
                }

            }

                // Min and max.
            @else {

                // Greater than or equal (>= x)
                @if ($op == 'gte') {
                    $media: 'screen and (min-width: ' + $x + ')';
                }

                    // Less than or equal (<= y)
                @else if ($op == 'lte') {
                    $media: 'screen and (max-width: ' + $y + ')';
                }

                    // Greater than (> y)
                @else if ($op == 'gt') {
                    $media: 'screen and (min-width: ' + ($y + 1) + ')';
                }

                    // Less than (< x)
                @else if ($op == 'lt') {
                    $media: 'screen and (max-width: ' + ($x - 1) + ')';
                }

                    // Not (< x and > y)
                @else if ($op == 'not') {
                    $media: 'screen and (max-width: ' + ($x - 1) + '), screen and (min-width: ' + ($y + 1) + ')';
                }

                    // Equal (>= x and <= y)
                @else {
                    $media: 'screen and (min-width: ' + $x + ') and (max-width: ' + $y + ')';
                }

            }

        }

            // String.
        @else {

            // Missing a media type? Prefix with "screen".
            @if (str-slice($a, 0, 1) == '(') {
                $media: 'screen and ' + $a;
            }

                // Otherwise, use as-is.
            @else {
                $media: $a;
            }

        }

    }

    // Output.
    @media #{$media} {
        @content;
    }

}
