.button-size(@height; @padding; @font-size; @border-radius) {
  padding: @padding;
  font-size: @font-size;
  border-radius: @border-radius;
  height: @height;
}

.button-disabled(@color: @btn-disable-color; @background: @btn-disable-bg; @border: @btn-disable-border) {
  &.disabled,
  &[disabled] {
    pointer-events: none;
    position: relative;

    &:before {
      display: block;
    }
    // &,
    // &:hover,
    // &:focus,
    // &:active,
    // &.active {
    //   .button-color(@color; @background; @border);
    // }
  }
}

.button-color(@color; @background; @border) {
  color: @color;
  background-color: @background;
  border-color: @border;
}

.btn() {
  width: 100%;
  display: flex;
  font-weight: @btn-font-weight;
  text-align: center;
  touch-action: manipulation;
  cursor: pointer;
  background-image: none;
  border: 1px solid transparent;
  white-space: nowrap;
  .button-size(@btn-height-base; @btn-padding-base; @font-size-base; @btn-border-radius-base);
  user-select: none;
  transition: all 0.3s @ease-in-out;
  position: relative;
  box-sizing: border-box;
  justify-content: center;

  > .@{iconfont-css-prefix} {
    line-height: 1;
  }

  &,
  &:active,
  &:focus {
    outline: 0;
  }

  &:not([disabled]):hover {
    text-decoration: none;
  }

  &:not([disabled]):active {
    outline: 0;
    transition: none;
  }

  &.disabled,
  &[disabled] {
    cursor: not-allowed;
    > * {
      pointer-events: none;
    }
  }

  &-lg {
    .button-size(@btn-height-lg; @btn-padding-lg; @btn-font-size-lg; @btn-border-radius-base);
  }

  &-sm {
    .button-size(@btn-height-sm; @btn-padding-sm; @btn-font-size-sm; @btn-border-radius-sm);
  }
}

// circle button: the content only contains icon
.btn-circle(@btnClassName: btn) {
  .square(@btn-circle-size);
  .button-size(@btn-circle-size; 0; @font-size-base + 2px; 50%);

  &.@{btnClassName}-lg {
    .square(@btn-circle-size-lg);
    .button-size(@btn-circle-size-lg; 0; @btn-font-size-lg + 2px; 50%);
  }

  &.@{btnClassName}-sm {
    .square(@btn-circle-size-sm);
    .button-size(@btn-circle-size-sm; 0; @font-size-base; 50%);
  }
}

.btn-primary() {
  .button-variant-primary(@btn-primary-color; @btn-primary-bg);
}

// ghost button style
.btn-ghost() {
  .button-variant-other(@btn-ghost-color, @btn-ghost-bg, @btn-ghost-border);
}

// dashed button style
.btn-dashed() {
  .button-variant-other(@btn-default-color, @btn-default-bg, @border-color-base);
  border-style: dashed;
}

// danger button style
.btn-danger() {
  .button-variant-primary(@btn-danger-color, @btn-danger-bg);
}

// default button style
.btn-default() {
  .button-variant-other(@btn-default-color; @btn-default-bg; @btn-default-border);
  &:hover,
  &:focus,
  &:active,
  &.active {
    background: @btn-default-bg;
    text-decoration: none;
  }
}

.button-variant-primary(@color; @background) {
  .button-color(@color; @background; @background);
  &:hover,
  &:focus {
    .button-color(@color; tint(@background, 20%) ; tint(@background, 20%));
  }

  &:active,
  &.active {
    .button-color(@color; shade(@background, 5%) ; shade(@background, 5%));
  }

  .button-disabled();
}

.button-variant-other(@color; @background; @border) {
  .button-color(@color; @background; @border);

  &:hover,
  &:focus {
    .button-color(@primary-5; @background; @primary-5);
  }

  &:active,
  &.active {
    .button-color(@primary-7; @background; @primary-7);
  }

  .button-disabled();
}