@import '../../styles/variables.less';
@import '../../styles/themes/@{so-theme}.less';

@carousel-arrow-bg: hsla(0, 0%, 100%, 0.3);
@carousel-arrow-bg-hover:hsla(0,0%,100%,.5);
@carousel-arrow-color: #fff;
@carousel-arrow-circle-size: 24px;
@carousel-arrow-circle-margin: 12px;
@carousel-arrow-size: 8px;
@carousel-arrow-border: 1px;

@carousel-prefix: ~'@{so-prefix}-carousel';
.@{carousel-prefix} {
  @keyframes-r2c: ~'@{carousel-prefix}-r2c';
  @keyframes-c2r: ~'@{carousel-prefix}-c2r';
  @keyframes-l2c: ~'@{carousel-prefix}-l2c';
  @keyframes-c2l: ~'@{carousel-prefix}-c2l';
  @keyframes-t2c: ~'@{carousel-prefix}-t2c';
  @keyframes-c2t: ~'@{carousel-prefix}-c2t';
  @keyframes-b2c: ~'@{carousel-prefix}-b2c';
  @keyframes-c2b: ~'@{carousel-prefix}-c2b';
  @keyframes-fade-in: ~'@{carousel-prefix}-fade-in';
  @keyframes-fade-out: ~'@{carousel-prefix}-fade-out';

  @keyframes @keyframes-r2c {
    0% {
      transform: translateX(100%);
      left: @carousel-caption-color;
    }

    100% {
      transform: translateX(0);
    }
  }

  @keyframes @keyframes-c2r {
    0% {
      transform: translateX(0);
    }

    100% {
      transform: translateX(100%);
    }
  }

  @keyframes @keyframes-l2c {
    0% {
      transform: translateX(-100%);
    }

    100% {
      transform: translateX(0);
    }
  }

  @keyframes @keyframes-c2l {
    0% {
      transform: translateX(0);
    }

    100% {
      transform: translateX(-100%);
    }
  }

  @keyframes @keyframes-t2c {
    0% {
      transform: translateY(-100%);
    }

    100% {
      transform: translateY(0);
    }
  }

  @keyframes @keyframes-c2t {
    0% {
      transform: translateY(0);
    }

    100% {
      transform: translateY(-100%);
    }
  }

  @keyframes @keyframes-b2c {
    0% {
      transform: translateY(100%);
    }

    100% {
      transform: translateY(0);
    }
  }

  @keyframes @keyframes-c2b {
    0% {
      transform: translateY(0);
    }

    100% {
      transform: translateY(100%);
    }
  }

  @keyframes @keyframes-fade-in {
    0% {
      opacity: 0;
    }

    100% {
      opacity: 1;
    }
  }

  @keyframes @keyframes-fade-out {
    0% {
      opacity: 1;
    }

    100% {
      opacity: 0;
    }
  }

  position: relative;
  overflow: hidden;
  &-rtl {
    direction: rtl;
    text-align: right;
  }

  &-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;

    & > * {
      width: 100%;
      height: 100%;
    }

    &-current {
      z-index: 10;
    }

    &-pre {
      z-index: 9;
    }
  }

  &-slide&-forward {
    .@{carousel-prefix}-item-current {
      animation: @keyframes-r2c @carousel-duration ease-in-out;
    }

    .@{carousel-prefix}-item-pre {
      animation: @keyframes-c2l @carousel-duration ease-in-out;
    }
  }

  &-slide&-backward {
    .@{carousel-prefix}-item-current {
      animation: @keyframes-l2c @carousel-duration ease-in-out;
    }

    .@{carousel-prefix}-item-pre {
      animation: @keyframes-c2r @carousel-duration ease-in-out;
    }
  }

  &-slide-y&-forward {
    .@{carousel-prefix}-item-current {
      animation: @keyframes-b2c @carousel-duration ease-in-out;
    }

    .@{carousel-prefix}-item-pre {
      animation: @keyframes-c2t @carousel-duration ease-in-out;
    }
  }

  &-slide-y&-backward {
    .@{carousel-prefix}-item-current {
      animation: @keyframes-t2c @carousel-duration ease-in-out;
    }

    .@{carousel-prefix}-item-pre {
      animation: @keyframes-c2b @carousel-duration ease-in-out;
    }
  }

  &-fade {
    .@{carousel-prefix}-item-current {
      animation: @keyframes-fade-in @carousel-duration ease-in-out;
    }
  }

  &-indicator {
    position: absolute;
    z-index: 100;
    bottom: @carousel-indicator-position;

    a {
      display: block;
      width: @carousel-indicator-size;
      height: @carousel-indicator-size;
      margin-right: @carousel-indicator-margin;
      border: solid 1px @carousel-indicator-border;
      background-color: @carousel-indicator-bg;
      border-radius: 50%;
      color: @carousel-indicator-color;
      float: left;

      &:last-child {
        margin-right: 0;
      }

      &:hover,
      &:focus {
        text-decoration: none;
      }
    }

    &&-left {
      left: @carousel-indicator-position;
    }

    &&-center {
      left: 50%;
      transform: translateX(-50%);
    }

    &&-right {
      right: @carousel-indicator-position;
    }

    a&-active {
      background-color: @carousel-indicator-active-bg;
      color: @carousel-indicator-active-color;
    }

    &-number a {
      width: @carousel-indicator-number-size;
      height: @carousel-indicator-number-size;
      border-radius: 1px;
      font-size: @carousel-indicator-font-size;
      line-height: @carousel-indicator-number-size;
      text-align: center;
    }

    &-line a {
      width: @carousel-indicator-line-width;
      height: @carousel-indicator-line-height;
      border-width: 0;
      background-color: @carousel-indicator-line-bg;
      border-radius: 0;
    }

    &-line a&-active {
      width: @carousel-indicator-line-width + 4;
      background-color: @carousel-indicator-line-active-bg;
    }
  }

  &-slide-y &-indicator {
    &.@{carousel-prefix}-indicator-left,
    &.@{carousel-prefix}-indicator-right {
      bottom: 50%;
      transform: translate(0, 50%);

      a {
        margin-right: 0;
        margin-bottom: @carousel-indicator-margin;
        clear: both;

        &:last-child {
          margin: 0;
        }
      }
    }

    &.@{carousel-prefix}-indicator-left,
    &.@{carousel-prefix}-indicator-right {
      &.@{carousel-prefix}-indicator-line a {
        width: @carousel-indicator-line-height;
        height: @carousel-indicator-line-width;

        &.@{carousel-prefix}-indicator-active {
          height: @carousel-indicator-line-width + 4;
        }
      }
    }
  }

  &-arrow {
    &>div {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      width: @carousel-arrow-circle-size;
      height: @carousel-arrow-circle-size;;
      border-radius: 50%;
      color: @carousel-arrow-color;
      background-color: @carousel-arrow-bg;
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      &::after {
        content: "  ";
        width: @carousel-arrow-size;
        height: @carousel-arrow-size;
        display: block;
        border-width: @carousel-arrow-border @carousel-arrow-border 0px 0px;
        border-style: solid;
        border-color: currentColor;
      }
      &:hover {
        background-color: @carousel-arrow-bg-hover;
      }
    }
    &-hover > div {
      opacity: 0;
      transition: opacity .3s;
      .@{carousel-prefix}:hover & {
        opacity: 1;
      }
    }
    &-left {
      left: 12px;
      &::after {
        transform: translateX(35%) rotate(-135deg) ;
      }
    }
    &-right {
      right: 12px;
      &::after {
        transform: translateX(-15%) rotate(45deg) ;
      }
    }
  }
}