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

@include iro.props-namespace('checkbox') {
    @include iro.props-store((
        --dims: (
            --size:            fn.global-dim(--size --175),
            --label-gap:       fn.global-dim(--size --125),
            --border:          fn.global-dim(--border --medium),
            --pad-i:           fn.global-dim(--size --65),
            --pad-b:           fn.global-dim(--size --65),
            --rounding:        fn.global-dim(--rounding),
            --spacing-sibling: fn.global-dim(--size --300),

            --key-focus: (
                --border:        fn.global-dim(--key-focus --border),
                --border-offset: fn.global-dim(--key-focus --border-offset),
                --outline:       fn.global-dim(--key-focus --outline),
            ),
        ),
        --colors: (
            --box-border: fn.global-color(--text-mute-more),
            --box-bg:     fn.global-color(--base --75),
    
            --hover: (
                --label:      fn.global-color(--heading),
                --box-border: fn.global-color(--text-mute),
            ),
            --accent: (
                --box-border: fn.global-color(--accent --900),
    
                --hover: (
                    --box-border: fn.global-color(--accent --1000),
                ),
            ),
            --disabled: (
                --label:      fn.global-color(--text-disabled),
                --box-border: fn.global-color(--border-strong),
                --box-bg:     fn.global-color(--base --75),
            ),
            --key-focus: (
                --label:   fn.global-color(--focus --text),
                --border:  fn.global-color(--focus --border),
                --outline: fn.global-color(--focus --outline),
            ),
        ),
    ));

    @include iro.bem-object(iro.props-namespace()) {
        position:       relative;
        display:        inline-block;
        padding-block:  fn.dim(--pad-b);
        padding-inline: fn.dim(--pad-i);
        margin-inline:
            calc(-1 * fn.dim(--pad-i) - fn.dim(--key-focus --border-offset))
            calc(fn.dim(--spacing-sibling) - fn.dim(--pad-b) - fn.dim(--key-focus --border-offset));

        @include iro.bem-elem('box') {
            position:           relative;
            display:            inline-block;
            flex:               0 0 auto;
            inline-size:        fn.dim(--size);
            block-size:         fn.dim(--size);
            margin-block-start: calc(.5em * fn.global-dim(--font --standard --line-height) - .5 * fn.dim(--size) - fn.dim(--key-focus --border-offset));
            vertical-align:     top;
            background-color:   fn.color(--box-border);
            background-clip:    padding-box;
            border:             fn.dim(--key-focus --border-offset) solid transparent;
            border-radius:      calc(fn.dim(--border) + fn.dim(--key-focus --border-offset));
    
            &::before,
            &::after {
                position: absolute;
                display:  block;
                content:  '';
            }
    
            &::before {
                inset-block-start:  fn.dim(--border);
                inset-inline-start: fn.dim(--border);
                z-index:            2;
                inline-size:        calc(fn.dim(--size) - 2 * fn.dim(--border));
                block-size:         calc(fn.dim(--size) - 2 * fn.dim(--border));
                background-color:   fn.color(--box-bg);
                transition:         transform .2s ease;
            }
    
            &::after {
                inset-block-start:   calc(.5 * fn.dim(--size) - 1px);
                inset-inline-start:  calc(1.5 * fn.dim(--border));
                z-index:             3;
                box-sizing:          border-box;
                inline-size:         calc(fn.dim(--size) - 3 * fn.dim(--border));
                block-size:          0;
                border-color:        fn.color(--box-bg);
                border-style:        solid;
                border-radius:       2px;
                transition:          transform .2s ease;
                transform:           scale(0);
                border-block-width:  0 2px;
                border-inline-width: 0 2px;
            }
        }
    
        @include iro.bem-elem('check-icon') {
            position:           absolute;
            inset-block-start:  calc(1 * fn.dim(--border));
            inset-inline-start: calc(1 * fn.dim(--border));
            z-index:            2;
            display:            block;
            inline-size:        calc(100% - 2 * fn.dim(--border));
            block-size:         calc(100% - 2 * fn.dim(--border));
            margin:             0;
            color:              fn.color(--box-bg);
            stroke-width:       iro.fn-px-to-rem(3px);
            transition:         transform .2s ease;
            transform:          scale(0);
            transform-origin:   40% 90%;
        }
    
        @include iro.bem-elem('label') {
            margin-inline-start: calc(fn.dim(--label-gap) - fn.dim(--key-focus --border-offset));
        }
    
        @include iro.bem-elem('native') {
            position:           absolute;
            inset-block-start:  0;
            inset-inline-start: 0;
            z-index:            -1;
            inline-size:        100%;
            block-size:         100%;
            padding:            0;
            margin:             0;
            overflow:           hidden;
            appearance:         none;
            border-radius:      fn.dim(--rounding);
    
            &:hover,
            &:focus-visible {
                @include iro.bem-sibling-elem('label') {
                    color: fn.color(--hover --label);
                }
    
                @include iro.bem-sibling-elem('box') {
                    background-color: fn.color(--hover --box-border);
                }
            }
    
            &:checked {
                @include iro.bem-sibling-elem('box') {
                    &::before {
                        transform: scale(0);
                    }
    
                    @include iro.bem-elem('check-icon') {
                        transform: scale(1);
                    }
                }
            }
    
            &:indeterminate {
                @include iro.bem-sibling-elem('box') {
                    &::before {
                        transform: scale(0);
                    }
    
                    &::after {
                        transform: scale(1);
                    }
    
                    @include iro.bem-elem('check-icon') {
                        transform: scale(0);
                    }
                }
            }
    
            &:disabled {
                @include iro.bem-sibling-elem('label') {
                    color: fn.color(--disabled --label);
                }
    
                @include iro.bem-sibling-elem('box') {
                    background-color: fn.color(--disabled --box-border);
    
                    &::before {
                        background-color: fn.color(--disabled --box-bg);
                    }
                }
            }
    
            &:focus-visible {
                @include iro.bem-sibling-elem('label') {
                    color: fn.color(--key-focus --label);
                }

                @include iro.bem-sibling-elem('box') {
                    outline:    fn.color(--key-focus --border) solid fn.dim(--key-focus --border);
                    box-shadow: 0 0 0 calc(fn.dim(--key-focus --border) + fn.dim(--key-focus --outline)) fn.color(--key-focus --outline);
                }
            }
        }
    
        @include iro.bem-modifier('standalone') {
            @include iro.bem-elem('box') {
                margin-block-start: 0;
            }
        }
    
        @include iro.bem-modifier('accent') {
            @include iro.bem-elem('native') {
                &:checked {
                    @include iro.bem-sibling-elem('box') {
                        background-color: fn.color(--accent --box-border);
                    }
        
                    &:hover,
                    &:focus-visible {
                        @include iro.bem-sibling-elem('box') {
                            background-color: fn.color(--accent --hover --box-border);
                        }
                    }
                }
    
                &:indeterminate {
                    @include iro.bem-sibling-elem('box') {
                        background-color: fn.color(--accent --box-border);
                    }
        
                    &:hover,
                    &:focus-visible {
                        @include iro.bem-sibling-elem('box') {
                            background-color: fn.color(--accent --hover --box-border);
                        }
                    }
                }
    
                &:disabled {
                    @include iro.bem-sibling-elem('box') {
                        background-color: fn.color(--disabled --box-border);
        
                        &::before {
                            background-color: fn.color(--disabled --box-bg);
                        }
                    }

                    &:checked {
                        @include iro.bem-sibling-elem('box') {
                            background-color: fn.color(--disabled --box-border);
                        }
                    }
        
                    &:indeterminate {
                        @include iro.bem-sibling-elem('box') {
                            background-color: fn.color(--disabled --box-border);
                        }
                    }
                }
            }
        }
    }
}