$module-name: date-picker;
$animation-speed: var(--animation-duration-fast);
$height: 18rem;
$lighten: rgba(255, 255, 255, 0.05);
$darken: rgba(0, 0, 0, 0.2);

.form-field-date-picker {
  --datepicker-panel-bg: var(--input-panel-bg);
  color: var(--input-text);
  &__error {
    opacity: 0;
    transition: opacity var(--animation-easing) var(--animation-duration-fast);
  }

  &__error-message {
    color: var(--form-error-text);
    background: var(--error);
    padding: 0.5rem 0.25rem;

    svg {
      max-height: 1.2rem;
    }
  }

  &--has-error {
    border-width: 0.1rem;
    border-style: solid;
    border-color: var(--error);
    border-top-left-radius: 1rem;
    border-top-right-radius: 1rem;

    .form-field-date-picker__error {
      opacity: 1;
    }
  }
}

.#{$module-name} {
  --active-color: var(--color-sea-green);
  --background: var(--input-background);
  --lighten: $lighten;
  --darken: $darken;
  max-width: 100%;
  position: relative;

  &__placeholder {
    color: var(--input-placeholder);
    font-style: italic;
  }

  &__preview {
    font-size: 1rem;
    background-color: var(--background);
    border-radius: 1rem 1rem 0 0;
    padding: 0 1rem;
    line-height: 4rem;
    display: flex;
    align-items: center;
    border-bottom: 2px solid transparent;
    transition: border-bottom-color var(--animation-easing) var(--animation-duration-fast);

    &-divider {
      color: var(--active-color);
      padding: 0 0.5rem;
    }

    &-part,
    &-clear {
      cursor: pointer;
      display: inline-block;
      transition: color var(--animation-easing) var(--animation-duration-fast);
    }

    &-part {
      color: var(--input-placeholder);
      font-style: italic;

      &--is-set {
        color: var(--input-text);
        font-style: normal;
      }
    }

    &-clear {
      border-bottom: 1px solid var(--active-color);
      line-height: 1.4rem;
      height: 1.4rem;
      margin-left: auto;
      opacity: 0;

      &--is-visible {
        opacity: 1;
        cursor: pointer;
      }
    }

    &--is-empty {
      color: var(--input-placeholder);
      cursor: pointer;
      font-style: italic;
    }

    &:focus {
      border-bottom-color: var(--active-color);
    }
  }

  &__container {
    position: absolute;
    z-index: var(--z-global-ui);
    width: 100%;
    max-width: 30rem;
    box-shadow: 0 2rem 3rem 0 var(--modal-window-box-shadow);
    margin-bottom: 3rem;
  }

  &__panels {
    background-color: var(--datepicker-panel-bg);
    height: $height;
    overflow: hidden;
  }

  &__panels-container {
    height: $height;
    position: relative;
  }

  &__panel {
    position: absolute;
    top: 0;
    left: 0;
    height: $height;
    display: flex;
    flex-direction: row;
    width: 100%;
    flex: 0 1 100%;
  }

  &__highlight {
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    padding: 0.75rem unit(2);
    border-radius: 5rem;
    background-color: transparent;
    transition: background-color ease $animation-speed;
  }

  &__range-item {
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;

    &--is-active {
      .#{$module-name}__highlight {
        background-color: var(--active-color);
      }
    }

    &--is-today {
      .#{$module-name}__highlight {
        font-weight: bold;
      }
    }

    &--is-disabled {
      pointer-events: none;
      opacity: 0.15;
    }
  }

  &__range-picker-items {
    display: grid;
    position: relative;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
  }

  &__range-picker {
    padding-top: 0 !important; // sass-lint:disable-line no-important
    position: absolute;
    top: 0;
    left: 0;
    overflow-y: auto;
    width: 100%;
    height: 100%;

    &--year {
      overflow-x: hidden;
      overflow-y: auto;
      // sass-lint:disable no-vendor-prefixes
      -webkit-overflow-scrolling: touch;

      .date-picker__range-picker-items {
        grid-template-columns: 1fr 1fr 1fr 1fr 1fr;
        grid-template-rows: minmax(auto, 5rem);
        padding: unit(2) 0;
        height: calc(100% - 3rem); // double padding
      }

      .#{$module-name}__range-item {
        padding: 1rem 0;
        max-height: 5rem;
        box-sizing: border-box;

        &:nth-child(10n - 9),
        &:nth-child(10n - 8),
        &:nth-child(10n - 7),
        &:nth-child(10n - 6),
        &:nth-child(10n - 5) {
          background-color: var(--lighten);
        }
      }
    }

    &--month {
      .date-picker__range-picker-items {
        grid-template-columns: 1fr 1fr 1fr;
      }

      .#{$module-name}__range-item {
        &:nth-child(6n - 5),
        &:nth-child(6n - 4),
        &:nth-child(6n - 3) {
          background-color: var(--lighten);
        }
      }
    }

    &--day {
      .date-picker__range-picker-items {
        grid-template-columns: 1fr 1fr 1fr 1fr 1fr 1fr 1fr;
      }

      .#{$module-name}__range-item {
        &:nth-child(14n - 13),
        &:nth-child(14n - 12),
        &:nth-child(14n - 11),
        &:nth-child(14n - 10),
        &:nth-child(14n - 9),
        &:nth-child(14n - 8),
        &:nth-child(14n - 7) {
          background-color: var(--lighten);
        }
      }
    }
  }

  &:focus,
  &--is-active {
    .#{$module-name}__preview {
      border-bottom-color: var(--active-color);
    }
  }
}