// studio - utilities - INHERITED mixins and extends

// NOTE: these are older/poorly architected mixins that we want to move away from using or refactor in the future.
// They are still referenced when styling current interface elements and as such need to be preserved for the time being.
// talbs: we need to slowly ween ourselves off of these
// ====================


// line-height (old way)
@function lh($amount: 1) {
  @return $body-line-height * $amount;
}

// inherited - vertical and horizontal centering
@mixin vertically-and-horizontally-centered ($height, $width) {
  left: 50%;
  margin-left: -$width / 2;
  min-height: $height;
  min-width: $width;
  position: absolute;
  top: 150px;
}

// ====================

// inherited - dividers
.faded-hr-divider {
  @include background-image(linear-gradient(180deg, rgba(200,200,200, 0) 0%,
                                                    rgba(200,200,200, 1) 50%,
                                                    rgba(200,200,200, 0)));
  height: 1px;
  width: 100%;
}

.faded-hr-divider-medium {
  @include background-image(linear-gradient(180deg, rgba(240,240,240, 0) 0%,
                                                    rgba(240,240,240, 1) 50%,
                                                    rgba(240,240,240, 0)));
  height: 1px;
  width: 100%;
}

.faded-hr-divider-light {
  @include background-image(linear-gradient(180deg, rgba(255,255,255, 0) 0%,
                                                    rgba(255,255,255, 0.8) 50%,
                                                    rgba(255,255,255, 0)));
  height: 1px;
  width: 100%;
}

.faded-vertical-divider {
  @include background-image(linear-gradient(90deg, rgba(200,200,200, 0) 0%,
                                                    rgba(200,200,200, 1) 50%,
                                                    rgba(200,200,200, 0)));
  height: 100%;
  width: 1px;
}

.faded-vertical-divider-light {
  @include background-image(linear-gradient(90deg, rgba(255,255,255, 0) 0%,
                                                    rgba(255,255,255, 0.6) 50%,
                                                    rgba(255,255,255, 0)));
  height: 100%;
  width: 1px;
}

.vertical-divider {
  @extend .faded-vertical-divider;
  position: relative;

  &::after {
    @extend .faded-vertical-divider-light;
    content: "";
    display: block;
    position: absolute;
    left: 1px;
  }
}

.horizontal-divider {
  border: none;
  @extend .faded-hr-divider;
  position: relative;

  &::after {
    @extend .faded-hr-divider-light;
    content: "";
    display: block;
    position: absolute;
    top: 1px;
  }
}

.fade-right-hr-divider {
  @include background-image(linear-gradient(180deg, rgba(200,200,200, 0) 0%,
                                                    rgba(200,200,200, 1)));
  border: none;
}

.fade-left-hr-divider {
  @include background-image(linear-gradient(180deg, rgba(200,200,200, 1) 0%,
                                                    rgba(200,200,200, 0)));
  border: none;
}

// ====================

// inherited - ui
.window {
  @include clearfix();
  box-shadow: 0 1px 1px $shadow-l1;
  border-radius: 3px;
  margin-bottom: $baseline;
  border: 1px solid $gray-l2;
  background: $white;
}

// ====================

// mixins - grandfathered
@mixin button {
  @include transition(background-color 0.15s, box-shadow 0.15s);
  @extend %t-action3;
  @extend %t-strong;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 0 0 $transparent;
  display: inline-block;
  padding: ($baseline/5) $baseline ($baseline/4);

  &.disabled, &.is-disabled {
    border: 1px solid $gray-l1 !important;
    border-radius: 3px !important;
    background: $gray-l1 !important;
    color: $gray-d1 !important;
    pointer-events: none;
    cursor: none;
    &:hover, &:focus {
      box-shadow: 0 0 0 0 !important;
    }
  }

  &:hover, &:focus, &:active {
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 1px 1px rgba(0, 0, 0, 0.15);
  }
}

@mixin green-button {
  @include button;
  @include linear-gradient(top, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset;
  border: 1px solid $uxpl-green-base;
  border-radius: 3px;
  background-color: $uxpl-green-base;
  color: $white;

  &:hover, &:focus {
    background-color: $uxpl-green-hover-active;
    color: $white;
  }

  &.disabled, &.is-disabled {
    border: 1px solid $green-l3 !important;
    background: $green-l3 !important;
    color: $white !important;
    box-shadow: none;
  }
}

@mixin blue-button {
  @include button;
  @include linear-gradient(top, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
  border: 1px solid $uxpl-blue-base;
  border-radius: 3px;
  background-color: $uxpl-blue-base;
  color: $white;

  &:hover, &:focus, &:active {
    background-color: $uxpl-blue-hover-active;
    color: $white;
  }

  &.disabled, &.is-disabled {
    box-shadow: none;
    border: 1px solid $blue-l3 !important;
    background: $blue-l3 !important;
    color: $white !important;
  }
}

@mixin red-button {
  @include button;
  @include linear-gradient(top, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
  border: 1px solid $red-d1;
  border-radius: 3px;
  background-color: $red;
  color: $white;

  &:hover, &:focus, &:active {
    background-color: $red-s1;
    color: $white;
  }

  &.disabled, &.is-disabled {
    box-shadow: none;
    border: 1px solid $red-l3 !important;
    background: $red-l3 !important;
    color: $white !important;
  }
}

@mixin pink-button {
  @include button;
  @include linear-gradient(top, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
  border: 1px solid $pink-d1;
  border-radius: 3px;
  background-color: $pink;
  color: $white;

  &:hover, &:focus, &:active {
    background-color: $pink-s1;
    color: $white;
  }

  &.disabled, &.is-disabled {
    box-shadow: none;
    border: 1px solid $pink-l3 !important;
    background: $pink-l3 !important;
    color: $white !important;
  }
}

@mixin orange-button {
  @include button;
  @include linear-gradient(top, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0) 60%);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset;
  border: 1px solid $orange-d1;
  border-radius: 3px;
  background-color: $orange;
  color: $gray-d2;

  &:hover, &:focus {
    background-color: $orange-s2;
    color: $gray-d2;
  }

  &.disabled, &.is-disabled {
    border: 1px solid $orange-l3 !important;
    background: $orange-l2 !important;
    color: $gray-l1 !important;
    box-shadow: none;
  }
}

@mixin white-button {
  @include button;
  @include linear-gradient(top, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0));
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset;
  border: 1px solid $mediumGrey;
  border-radius: 3px;
  background-color: #dfe5eb;
  color: rgb(92, 103, 122);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);

  &:hover, &:focus {
    background-color: rgb(222, 236, 247);
    color: rgb(92, 103, 122);
  }
}

@mixin grey-button {
  @include button;
  @include linear-gradient(top, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset;
  border: 1px solid $gray-d2;
  border-radius: 3px;
  background-color: #d1dae3;
  color: #6d788b;

  &:hover {
    background-color: #d9e3ee;
    color: #6d788b;
  }
}

.gray-button {
  @include button;
  @include linear-gradient(top, $white-t1, rgba(255, 255, 255, 0));
  box-shadow: 0 1px 0 $white-t1 inset;
  border: 1px solid $gray-d1;
  border-radius: 3px;
  background-color: $gray-d2;
  color: $gray-l3;

  &:hover, &:focus {
    background-color: $gray-d3;
    color: $white;
  }
}

// only needed for course updates
@mixin edit-box {
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.2) inset;
  padding: 15px 20px;
  border-radius: 3px;
  background-color: $lightBluishGrey2;
  color: #3c3c3c;

  label {
    color: $baseFontColor;
  }

  input,
  textarea {
    border: 1px solid $darkGrey;
  }

  textarea {
    min-height: 80px;
  }

  h5 {
    @extend %t-strong;
    margin-bottom: 8px;
    color: $white;
  }

  .row {
    margin-bottom: ($baseline/2);
    padding: 0;
    border: none;
  }

  .save-button {
    @include blue-button;
    margin-top: 0;
  }

  .cancel-button {
    @include white-button;
    margin-top: 0;
  }
}

// ====================

// sunsetted mixins
@mixin active {
  @include linear-gradient(top, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0));
  box-shadow: 0 -1px 0 $shadow inset, 0 1px 0 $white inset;
  background-color: rgba(255, 255, 255, 0.3);
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
}
