@use 'sass:string';
@use 'sass:meta';
@use '../../constants/namespace.scss' as *;

// BEM support Func
@function selectorToString($selector) {
  $selector: meta.inspect($selector);
  $selector: string.slice($selector, 2, -2);
  @return $selector;
}

@function containsModifier($selector) {
  $selector: selectorToString($selector);

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

@function containWhenFlag($selector) {
  $selector: selectorToString($selector);

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

@function containPseudoClass($selector) {
  $selector: selectorToString($selector);

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

@function hitAllSpecialNestRule($selector) {
  @return containsModifier($selector) or containWhenFlag($selector) or
    containPseudoClass($selector);
}

// join var name
// joinVarName(('button', 'text-color')) => '--xx-button-text-color'
@function joinVarName($list) {
  $name: '--' + $namespace;
  @each $item in $list {
    @if $item != '' {
      $name: $name + '-' + $item;
    }
  }
  @return $name;
}

// getCssVarName('button', 'text-color') => '--xx-button-text-color'
@function getCssVarName($args...) {
  @return joinVarName($args);
}

// getCssVar('button', 'text-color') => var(--xx-button-text-color)
@function getCssVar($args...) {
  @return var(#{joinVarName($args)});
}

@mixin setCssVar($name, $value) {
  #{joinVarName($name)}: #{$value};
}

// set all css var for component by map
@mixin setCssVarMap($name, $variables) {
  @each $attribute, $value in $variables {
    @if $attribute == 'default' {
      #{getCssVarName($name)}: #{$value};
    } @else {
      #{getCssVarName($name, $attribute)}: #{$value};
    }
  }
}

@mixin setCssVarType($name, $type, $variables) {
  #{getCssVarName($name, $type)}: #{map.get($variables, $type)};
}

// getCssVarWithDefault(('button', 'text-color'), red) => var(--xx-button-text-color, red)
@function getCssVarWithDefault($args, $default) {
  @return var(#{joinVarName($args)}, #{$default});
}

// bem('block', 'element', 'modifier') => 'xx-block__element--modifier'
@function bem($block, $element: '', $modifier: '') {
  $name: $namespace + $common-separator + $block;

  @if $element != '' {
    $name: $name + $element-separator + $element;
  }

  @if $modifier != '' {
    $name: $name + $modifier-separator + $modifier;
  }

  // @debug $name;
  @return $name;
}