@use 'iro-sass/src/index' as iro;
@use '../functions' as fn;

@use 'action-button';

@include iro.props-namespace('lightbox') {
    @include iro.props-store((
        --dims: (
            --pad: fn.global-dim(--size --150),
            --thumbnail: (
                --size:     fn.global-dim(--size --700),
                --spacing:  fn.global-dim(--size --100),
                --idle:     1px,
                --selected: 2px,
            ),
            --close-button: (
                --font-size: fn.global-dim(--font-size --200),
            ),
            --nav-button: (
                --width:     fn.global-dim(--size --3800),
                --height:    fn.global-dim(--size --3800),
                --font-size: fn.global-dim(--font-size --200),
            ),
        ),
    ), 'dims');

    @include iro.props-store((
        --dims: (
            --thumbnail: (
                --size: fn.global-dim(--size --600),
            ),
            --nav-button: (
                --width:  fn.global-dim(--size --2500),
                --height: fn.global-dim(--size --2500),
            ),
        ),
    ), 'md');

    @include iro.props-store((
        --colors: (
            --thumbnail: (
                --idle:     fn.global-color(--fg-hi2),
                --selected: fn.global-color(--fg-lo),
            ),
            --footer: (
                --bg: fn.global-color(--bg-hi),
            ),
        ),
    ), 'colors');

    @include iro.bem-object(iro.props-namespace()) {
        display:               grid;
        grid-template-rows:    auto minmax(0, 1fr) auto auto;
        grid-template-columns: auto minmax(0, 1fr) auto;
        grid-template-areas:
            'header     header     header'
            'prev       content    next'
            'thumbnails thumbnails thumbnails'
            'footer     footer     footer';
        box-sizing:            border-box;
        height:                100%;
        overflow:              hidden;

        @include iro.bem-elem('header') {
            grid-area:   header;
            display:     flex;
            align-items: flex-start;
            padding:     fn.dim(--pad) fn.dim(--pad) 0;
        }

        @include iro.bem-elem('img') {
            display:    none;
            box-sizing: border-box;
            grid-area:  content;
            width:      100%;
            height:     100%;
            padding:    fn.dim(--pad);
            object-fit: scale-down;

            @include iro.bem-sibling-elem('img') {
                @include iro.bem-modifier('default') {
                    display: block;
                }
            }

            @include iro.bem-multi('&:target', 'is' 'visible') {
                display: block;

                @include iro.bem-sibling-elem('img') {
                    @include iro.bem-modifier('default') {
                        display: none;
                    }
                }
            }
        }

        @include iro.bem-elem('thumbnails') {
            grid-area: thumbnails;
            display:   flex;
            gap:       fn.dim(--thumbnail --spacing);
            padding:   fn.dim(--thumbnail --selected) fn.dim(--pad) fn.dim(--pad);
            overflow:  auto;
        }

        @include iro.bem-elem('footer') {
            grid-area:        footer;
            background-color: fn.color(--footer --bg);
        }

        @include iro.bem-elem('thumbnail') {
            position:  relative;
            flex:      0 0 auto;
            width:     fn.dim(--thumbnail --size);
            height:    fn.dim(--thumbnail --size);
            opacity:   .75;
            box-shadow: 0 0 0 fn.dim(--thumbnail --idle) fn.color(--thumbnail --idle) inset;

            &:hover {
                opacity: 1;
            }

            @include iro.bem-is('selected') {
                opacity:    1;
                box-shadow: 0 0 0 fn.dim(--thumbnail --selected) fn.color(--thumbnail --selected);
            }
        }

        @include iro.bem-elem('thumbnail-img') {
            display:         block;
            position:        absolute;
            top:             0;
            left:            0;
            width:           100%;
            height:          100%;
            object-fit:      cover;
            object-position: center center;
        }

        @include iro.bem-elem('thumbnail-icon') {
            position:  absolute;
            top:       50%;
            left:      50%;
            transform: translate(-50%, -50%);
        }

        @include iro.bem-elem('close-btn') {
            flex:      0 0 auto;
            margin:    calc(-.5 * fn.dim(--pad)) calc(-.5 * fn.dim(--pad)) 0 auto;
            font-size: fn.dim(--close-button --font-size);
        }

        @include iro.bem-elem('nav-btn') {
            position:   relative;
            align-self: center;
            overflow:   visible;
            font-size:  fn.dim(--nav-button --font-size);

            &::after {
                content:   '';
                display:   block;
                position:  absolute;
                top:       50%;
                left:      50%;
                width:     fn.dim(--nav-button --width);
                height:    fn.dim(--nav-button --height);
                transform: translate(-50%, -50%);
            }

            @include iro.bem-modifier('prev') {
                grid-area:    prev;
                margin-right: calc(-1 * fn.dim(--pad));
                margin-left:  calc(.5 * fn.dim(--pad));
            }
    
            @include iro.bem-modifier('next') {
                grid-area:    next;
                margin-right: calc(.5 * fn.dim(--pad));
                margin-left:  calc(-1 * fn.dim(--pad));
            }
        }
    }
}