@use "../../wc";
@use "../../form-control";

:host {
  display: block;
  line-height: var(--zn-line-height-dense);

  --zn-priority-list-item-gap: var(--zn-spacing-2x-small);
  --zn-priority-list-item-padding: var(--zn-spacing-small) var(--zn-spacing-medium);
  --zn-priority-list-handle-color: var(--zn-color-neutral-400);
  --zn-priority-list-priority-color: var(--zn-color-neutral-600);
}

.form-control {
  position: relative;
  border: none;
  padding: 0;
  margin: 0;
}

.form-control__label {
  padding: 0;
}

.priority-list {
  display: flex;
  flex-direction: column;
  gap: var(--zn-priority-list-item-gap);
}

.priority-list--disabled {
  opacity: 0.5;
  pointer-events: none;
}

// During an active drag, animate items shifting into new positions
.priority-list--drag-active {
  .priority-list__item {
    transition: transform 200ms ease, opacity 200ms ease, box-shadow 200ms ease;
  }
}

.priority-list__item {
  display: flex;
  align-items: center;
  gap: var(--zn-spacing-small);
  padding: var(--zn-priority-list-item-padding);
  background: rgb(var(--zn-panel));
  border: 1px solid rgb(var(--zn-border-color));
  border-radius: var(--zn-border-radius-medium);
  cursor: grab;
  user-select: none;
  -webkit-user-drag: element;
  position: relative;

  &:hover {
    background: rgb(var(--zn-panel-hover, var(--zn-panel)));
    border-color: rgb(var(--zn-color-primary-500));

    .priority-list__handle {
      color: rgb(var(--zn-color-primary-500));
    }
  }

  &:focus-visible {
    outline: 2px solid rgb(var(--zn-color-primary-500));
    outline-offset: -1px;
    border-color: rgb(var(--zn-color-primary-500));
  }

  &:active {
    cursor: grabbing;
  }
}

// The item currently being dragged — shown as a faded placeholder
.priority-list__item--dragging {
  opacity: 0.3;
  border-style: dashed;
  border-color: rgb(var(--zn-color-primary-400));
  background: rgb(var(--zn-color-primary-50, var(--zn-panel)));
  box-shadow: none;
}

.priority-list__item--disabled {
  cursor: not-allowed;
  opacity: 0.6;

  &:hover {
    background: rgb(var(--zn-panel));
    border-color: rgb(var(--zn-border-color));
  }
}

.priority-list__handle {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--zn-priority-list-handle-color);
  cursor: grab;
  transition: color 150ms ease;

  &:active {
    cursor: grabbing;
  }
}

.priority-list__priority {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  min-width: 1.5em;
  font-size: var(--zn-font-size-small);
  font-weight: var(--zn-font-weight-semibold);
  color: var(--zn-priority-list-priority-color);
}

.priority-list__content {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  // Prevent slotted content from capturing its own drag events,
  // which would override the item-level draggable behaviour
  pointer-events: none;

  ::slotted(*) {
    pointer-events: none;
    -webkit-user-drag: none;
  }
}

.priority-list__actions {
  display: flex;
  align-items: center;
  gap: var(--zn-spacing-2x-small);
  flex-shrink: 0;
  // Re-enable pointer events so action buttons are clickable
  pointer-events: auto;

  ::slotted(*) {
    pointer-events: auto;
    -webkit-user-drag: none;
  }
}

// Size variants
:host([size="small"]) {
  .priority-list__item {
    padding: var(--zn-spacing-2x-small) var(--zn-spacing-small);
    font-size: var(--zn-font-size-small);
  }

  .priority-list__priority {
    font-size: var(--zn-font-size-x-small);
    min-width: 1.25em;
  }
}

:host([size="large"]) {
  .priority-list__item {
    padding: var(--zn-spacing-medium) var(--zn-spacing-large);
    font-size: var(--zn-font-size-medium);
  }

  .priority-list__priority {
    font-size: var(--zn-font-size-medium);
    min-width: 1.75em;
  }
}

// The collector div that holds the default slot is hidden; items get
// reassigned to named slots once detected.
.priority-list__collector {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
  pointer-events: none;
}

.priority-list__hidden-inputs {
  display: none;
}