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

@use 'action-button';

$static-themes: 'black' 'white' !default;

@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:     fn.global-dim(--border --thin),
                --selected: fn.global-dim(--border --medium),
            ),
            --close-button: (
                --font-size: fn.global-dim(--font-size --200),
            ),
            --nav-button: (
                --width:     fn.global-dim(--size --2000),
                --height:    fn.global-dim(--size --3800),
                --font-size: fn.global-dim(--font-size --200),
            ),
        ),
        --colors: (
            --thumbnail: (
                --idle:     fn.global-color(--border-strong),
                --selected: fn.global-color(--heading),
            ),
        ),
    ));

    @each $theme in $static-themes {
        @include iro.props-store((
            --colors: (
                --static-#{$theme}: (
                    --text:         fn.global-color(--white-transparent --800),
                    --thumbnail: (
                        --idle:     fn.global-color(--white-transparent --400),
                        --selected: fn.global-color(--white-transparent --900),
                    ),
                )
            )
        ));
    }

    @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.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;
        block-size:            100%;
        min-block-size:        0;

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

        @include iro.bem-elem('img') {
            display:     none;
            box-sizing:  border-box;
            grid-area:   content;
            inline-size: 100%;
            block-size:  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-next-elem('nav-btn') {
                        display: block;
    
                        @include iro.bem-next-elem('nav-btn') {
                            display: block;
                        }
                    }
                }
            }

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

                @include iro.bem-next-elem('nav-btn') {
                    display: block;

                    @include iro.bem-next-elem('nav-btn') {
                        display: block;
                    }
                }

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

                        @include iro.bem-next-elem('nav-btn') {
                            display: none;
        
                            @include iro.bem-next-elem('nav-btn') {
                                display: none;
                            }
                        }
                    }
                }
            }
        }

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

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

        @include iro.bem-elem('thumbnail') {
            position:    relative;
            flex:        0 0 auto;
            inline-size: fn.dim(--thumbnail --size);
            block-size:  fn.dim(--thumbnail --size);
            outline:     fn.dim(--thumbnail --idle) solid fn.color(--thumbnail --idle);
            opacity:     .75;

            &:hover,
            &:focus-visible {
                opacity: 1;
            }

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

        @include iro.bem-elem('thumbnail-img') {
            display:            block;
            position:           absolute;
            inset-block-start:  0;
            inset-inline-start: 0;
            inline-size:        100%;
            block-size:         100%;
            object-fit:         cover;
            object-position:    center center;
        }

        @include iro.bem-elem('thumbnail-icon') {
            position:           absolute;
            inset-block-start:  50%;
            inset-inline-start: 50%;
            transform:          translate(-50%, -50%);
        }

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

        @include iro.bem-elem('nav-btn') {
            display:    none;
            position:   relative;
            align-self: center;
            overflow:   visible;
            font-size:  fn.dim(--nav-button --font-size);

            &::before {
                content:            '';
                display:            block;
                position:           absolute;
                inset-block-start:  50%;
                inline-size:        fn.dim(--nav-button --width);
                block-size:         fn.dim(--nav-button --height);
                transform:          translateY(-50%);
            }

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

                &::before {
                    inset-inline-start: 0;
                }
            }
    
            @include iro.bem-modifier('next') {
                grid-area:     next;
                margin-inline: calc(-1 * fn.dim(--pad)) calc(.5 * fn.dim(--pad));

                &::before {
                    inset-inline-end: 0;
                }
            }
        }
    
        @each $theme in $static-themes {
            @include iro.bem-modifier(static-#{$theme}) {
                color: fn.color(--static-#{$theme} --text);

                @include iro.bem-elem('thumbnail') {
                    outline-color: fn.color(--static-#{$theme} --thumbnail --idle);
        
                    @include iro.bem-is('selected') {
                        outline-color: fn.color(--static-#{$theme} --thumbnail --selected);
                    }
                }
            }
        }
    }
}