@use "sass:list";
@use "sass:color";
@use "styles/library" as library;

$dropdown_bg: oklch(1 0 0); // #FFFFFF
$dropdown_border_color: oklch(0 0 0 / 20%);
$dropdown_hover: oklch(0.9702 0 0); // #F5F5F5

$dropdown_height: 40px;
$dropdown_border_radius: 8px;

$dropdown_animation_timing: cubic-bezier(0.4, 0, 0.2, 1);
$dropdown_animation_duration: 0.2s;

:host {
  display: inline-block;
  position: relative;

  padding: 0; margin: 0;

  background-color: $dropdown_bg;
  border-radius: $dropdown_border_radius;
  box-shadow: 0 0 0 1px $dropdown_border_color inset;
  cursor: pointer;

  max-width: 100%;
  --dropdown-duration: #{$dropdown_animation_duration};

  &.reduce-motion {
    --dropdown-duration: 0s;
  }
}

.dropdown-box {
  display: flex;
  align-items: center;
  padding: 0 10px;
  height: $dropdown_height;
  box-sizing: border-box;
  gap: 8px;

  .prefix-icon {
    width: 24px; height: 24px;
    flex-shrink: 0;
    user-select: none;
  }

  .placeholder {
    flex-grow: 1;
    font-size: 18px;
    height: 24px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    user-select: none;

    align-content: center;
  }

  .chevron {
    width: 24px; height: 24px;
    flex-shrink: 0;
    transition: transform var(--dropdown-duration) $dropdown_animation_timing;
    user-select: none;

    &.open {
      transform: rotate(180deg);
    }
  }
}

.dropdown-list {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  width: 100%;
  padding: 0;
  margin: 0;
  list-style: none;
  background-color: $dropdown_bg;
  border-radius: $dropdown_border_radius;
  z-index: 1000;
  max-height: 240px;
  overflow-y: auto;
  box-shadow: 0 4px 12px oklch(0 0 0 / 10%); // rgba(0, 0, 0, 0.1)
  animation: slideIn var(--dropdown-duration) $dropdown_animation_timing;

  &::after {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border-radius: $dropdown_border_radius;
    box-shadow: 0 0 0 1px $dropdown_border_color inset;
    pointer-events: none;
    z-index: 1001;
  }

  @keyframes slideIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }
}

.dropdown-item {
  display: flex;
  align-items: center;
  height: 40px;
  padding: 0 16px;
  position: relative;
  align-content: center;
  transition: background-color var(--dropdown-duration) $dropdown_animation_timing;

  &:hover, &.focused {
    background-color: $dropdown_hover;
  }

  &.selected {
    background-color: list.nth(library.$brand_palette, 1);
    color: list.nth(library.$brand_palette, 5);
    font-weight: 600;
  }
}