@use './config' as *;

// .sd-link { ==> sd-link
@function selectorToString($selector) {
    $selector: inspect($selector);  // 返回 $value 的字符串表示形式
    $selector: str-slice($selector, 2, -2);
    @return $selector;
}

// 含有修饰符的选择器
@function containsModifier($selector) {
    $selector: selectorToString(($selector));

    @if str-index($selector, config.$modifier-separator) {
        @return true;
    } @else {
        @return false;
    }
}

// 含有状态的选择器
@function containWhenFlag($selector) {
    $selector: selectorToString($selector);

    @if str-index($selector, '.' + config.$state-prefix) {
        @return true;
    } @else {
        @return false;
    }
}

// 含有伪元素或伪选择器
@function containPseudoClass($selector) {
    $selector: selectorToString($selector);

    @if str-index($selector, ':') {
        @return true;
    } @else {
        @return false;
    }
}   

// 特殊嵌套的规则
@function hitAllSpecialNestRule($selector) {
    @return containsModifier($selector) or containWhenFlag($selector) or containPseudoClass($selector);
}


// 链接 css 变量明
// joinVarName('button', 'text-color') ==> --sd-button-text-color
@function joinVarName($list) {
    $name: '--' + config.$namespace;
    @each $item in $list {
        @if $item != '' {
            $name: $name + '-' + $item;
        }    
    }
    @return $name;
}


@function getCssVarName($args...) {
    @return joinVarName($args);
}

@function getCssVar($args...) {
    @return var(#{joinVarName($args)})
}