@use '@style/theme/index.scss' as theme;
@use 'sass:string';
@use '@components/layout/style/token.scss' as *;

$layout-prefix-cls: string.unquote('#{theme.$prefix}-layout');
$btn-text-prefix-cls: string.unquote('#{theme.$prefix}-btn-text');
$sider-prefix-cls: string.unquote('#{theme.$prefix}-layout-sider');
$text-color: var(string.unquote('#{theme.$sd-cssvars-prefix}-color-text-1'));

.#{$layout-prefix-cls} {
  display: flex;
  flex: auto;
  flex-direction: column;

  /* fix firefox can't set height smaller than content on flex item */
  min-height: 0;
  background: $layout-body-bg;

  &,
  & * {
    box-sizing: border-box;
  }

  &#{&}-has-sider {
    position: relative;
    flex-direction: row;

    > .#{$layout-prefix-cls},
    > .#{$layout-prefix-cls}-content {
      width: 0;
    }
  }

  .#{$layout-prefix-cls}-header,
  &.#{$layout-prefix-cls}-footer {
    flex: 0 0 auto;
  }

  // RTL
  &-rtl {
    direction: rtl;
  }
}

// ==================== Header ====================
.#{$layout-prefix-cls}-header {
  height: $layout-header-height;
  padding: $layout-header-padding;
  color: $layout-header-color;
  line-height: $layout-header-height;
  background: $layout-header-bg;

  .#{$btn-text-prefix-cls} {
    color: $layout-header-color;
  }
}

// ==================== Footer ====================
.#{$layout-prefix-cls}-footer {
  padding: $layout-footer-padding;
  color: $text-color;
  font-size: $layout-font-size;
  background: $layout-footer-bg;
}

// =================== Content ===================
.#{$layout-prefix-cls}-content {
  flex: auto;

  // fix firefox can't set height smaller than content on flex item
  min-height: 0;
  color: $text-color;
}

// =================== Sider ===================
.#{$sider-prefix-cls} {
  position: relative;
  display: flex;
  flex-direction: column;

  // fix firefox can't set width smaller than content on flex item
  min-width: 0;
  background: $layout-sider-bg;
  // 与 Menu 的展开/收起过渡保持一致（同时长 + standard 缓动），避免同步收缩时出现割裂感
  transition:
    all $layout-motion-duration-mid theme.$transition-timing-function-standard,
    background 0s;

  &-has-trigger {
    padding-bottom: $layout-sider-trigger-height;
  }

  &-right {
    order: 1;
  }

  // Fixed region outside the scroll area (e.g. brand / logo).
  &-header {
    flex: none;
  }

  // Scroll region fills the remaining height. `min-height: 0` lets it shrink
  // below its content so the inner scrollbar can scroll.
  &-children {
    flex: 1;
    min-height: 0;
  }

  &-children-scroll {
    overflow: hidden auto;
  }

  &-zero-width &-children {
    overflow: hidden;
  }

  &-trigger {
    position: absolute;
    bottom: 0;
    z-index: 1;
    height: $layout-sider-trigger-height;
    color: $layout-sider-trigger-color;
    line-height: $layout-sider-trigger-height;
    text-align: center;
    cursor: pointer;
    transition:
      color $layout-motion-duration-mid theme.$transition-timing-function-standard,
      background-color $layout-motion-duration-mid theme.$transition-timing-function-standard;
  }

  &-zero-width-trigger {
    position: absolute;
    top: $layout-header-height;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: $layout-sider-zero-trigger-width;
    height: $layout-sider-zero-trigger-height;
    color: $layout-sider-trigger-color;
    font-size: $layout-sider-zero-trigger-font-size;
    background: $layout-sider-bg;
    border-radius: 0 $layout-radius-lg $layout-radius-lg 0;
    cursor: pointer;
    transition: background-color $layout-motion-duration-slow ease;
    inset-inline-end: -$layout-sider-zero-trigger-width;

    &::after {
      position: absolute;
      inset: 0;
      background: transparent;
      transition: background-color $layout-motion-duration-slow ease;
      content: '';
    }

    &:hover::after {
      background: rgb(255 255 255 / 20%);
    }

    &-right {
      inset-inline-start: -$layout-sider-zero-trigger-width;
      border-radius: $layout-radius-lg 0 0 $layout-radius-lg;
    }
  }

  // Light
  &-light {
    background: $layout-light-sider-bg;

    .#{$sider-prefix-cls}-trigger {
      color: $layout-light-trigger-color;
      background: $layout-light-trigger-bg;
    }

    .#{$sider-prefix-cls}-zero-width-trigger {
      color: $layout-light-trigger-color;
      background: $layout-light-trigger-bg;
      border: 1px solid $layout-body-bg;
      border-inline-start: 0;
    }
  }

  // Temporary: aside 退化为触发器宿主，菜单内容交给 Drawer 渲染。
  &-temporary {
    flex: 0 0 auto;
    width: auto;
    background: transparent;
  }

  &-temporary-trigger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: $layout-sider-zero-trigger-width;
    height: $layout-sider-zero-trigger-width;
    color: $text-color;
    font-size: $layout-sider-zero-trigger-font-size;
    border-radius: $layout-radius-lg;
    cursor: pointer;
    transition: background-color $layout-motion-duration-mid ease;

    &:hover {
      background: var(string.unquote('#{theme.$sd-cssvars-prefix}-color-fill-2'));
    }
  }

  // Rail：aside 常驻窄轨态。aside 流内占位恒为 railWidth，且必须 overflow: visible，
  // 否则 hover 时内部 absolute overlay 会被裁掉、无法覆盖到相邻内容上方。
  &-rail {
    overflow: visible;
  }

  // Rail 内容 overlay 容器：承载 header/children/trigger。始终保持绝对定位（脱离文档流，
  // 不推动右侧内容），宽度在内联 style 上随 hover 在 railWidth ↔ 全宽之间切换。
  // 这里补 width 过渡 → 平滑展开/收回；过渡只作用于浮层自身宽度，不触发相邻内容重排。
  &-rail-overlay {
    position: absolute;
    inset: 0;
    height: 100%;
    overflow: hidden;
    background: inherit;
    transition:
      width $layout-motion-duration-mid theme.$transition-timing-function-standard,
      box-shadow $layout-motion-duration-mid theme.$transition-timing-function-standard;
  }

  // Rail 悬停展开覆盖态（作用于 overlay）：全宽浮于内容上方，
  // 宽度由内联 style 给定，这里补 z-index 与阴影以区分浮层与底图。
  &-rail-expand {
    z-index: $layout-sider-rail-expand-z-index;
    box-shadow: var(string.unquote('#{theme.$sd-cssvars-prefix}-shadow2-center'));
  }
}