@require 'grid-settings.styl';

row($min-width = false) {
    display: flex;

    if $min-width {
        flex-direction: column;

        @media only screen and (min-width: $min-width) {
            flex-direction: row;
        }
    } else {
        flex-direction: row;
    }
}

row-reverse($min-width = false) {
    display: flex;

    if $min-width {
        flex-direction: column;

        @media only screen and (min-width: $min-width) {
            flex-direction: row-reverse;
        }
    } else {
        flex-direction: row-reverse;
    }
}

flex-column($span, $total, $min-width) {
    flex-grow: 0;
    flex-shrink: 0;
    if $min-width {
        width: 100%;

        @media only screen and (min-width: $min-width) {
            width: ((100% * $span)/ $total);
        }
    } else {
        width: ((100% * $span)/ $total);
    }
}

flex-offset($span, $total, $min-width) {
    flex-grow: 0;
    flex-shrink: 0;
    if $min-width {
        margin-inline-start: 0;

        @media only screen and (min-width: $min-width) {
            margin-inline-start: ((100% * $span) / $total);
        }
    } else {
        margin-inline-start: ((100% * $span) / $total);
    }
}

flex-grid($columns, $min-width = false)
    .row
        row($min-width)

    .row-reverse
        row-reverse($min-width)

    .row,
    .row-reverse
        & > .col
            flex-grow: 1;
            flex-shrink: 1;
            &.col-fixed
                --col-width: auto;
                --col-offset: 0;
                flex-grow: unset;
                flex-shrink: unset;
                width: var(--col-width);
                margin-inline-start: var(--col-offset);

        for $span in (1..$columns)
            & > .col-{$span}
                flex-column($span, $columns, $min-width)
            & > .offset-{$span}
                flex-offset($span, $columns, $min-width)

flex-grid(12)

&,
.grid >,
.grid-12 >,
.grid-xs-12 >
    flex-grid(12)

.grid-xs-12
    & > 
        flex-grid(12, $size-xs)

.grid-sm-12
    & > 
        flex-grid(12, $size-sm)

.grid-md-12
    & > 
        flex-grid(12, $size-md)

.grid-lg-12
    & > 
        flex-grid(12, $size-lg);

.grid-xl-12
    & > 
        flex-grid(12, $size-xl);

.grid-space
    & > .row,
    & > .row-reverse
        padding: 0 ($grid-spacing / 2)

        & > .col,
        & > [class^=col-]
            padding: ($grid-spacing / 2)

    & > .row:first-child
    & > .row-reverse:last-child
        & > .col,
        & > [class^=col-]
            padding-top: $grid-spacing

    & > .row:last-child
    & > .row-reverse:first-child
        & > .col,
        & > [class^=col-]
            padding-bottom: $grid-spacing