---
// Transfer initializes from `data-bs-toggle="transfer"` (tabler.js, core/js/src/transfer.ts).
// The rows live in the markup; the plugin moves them and keeps the `<select multiple>` in sync.
import Icon from './Icon.astro'

export interface TransferItem {
  value: string
  label: string
  disabled?: boolean
}

interface Props {
  /** every row, in its original order */
  items: TransferItem[]
  /** values of the rows that start in the target list */
  selected?: string[]
  /** data-bs-name: `name` of the `<select multiple>` that carries the value in a form */
  name?: string
  /** headers of the two panels */
  titles?: [string, string]
  /** search field in each panel header */
  search?: boolean
  /** select-all checkbox in each panel header */
  selectAll?: boolean
  /** up / down buttons to reorder the target list */
  reorder?: boolean
  /** data-bs-counter-template: `{checked}` and `{total}` are replaced (default: `{checked} / {total}`) */
  counterTemplate?: string
  /** placeholder of the search fields */
  searchPlaceholder?: string
  /** height of the lists, any CSS length */
  height?: string
  class?: string
  /** remaining attributes (id, data-*, …) are forwarded to the root element */
  [key: string]: unknown
}

const { items, selected = [], name, titles = ['Available', 'Selected'], search = false, selectAll = true, reorder = false, counterTemplate, searchPlaceholder = 'Search…', height, class: className, ...rest } = Astro.props

const sides = [
  { side: 'source', title: titles[0], items: items.filter((item) => !selected.includes(item.value)) },
  { side: 'target', title: titles[1], items: items.filter((item) => selected.includes(item.value)) },
]

const style = height ? `--tblr-transfer-list-height: ${height}` : undefined
---

<div class:list={['transfer', className]} data-bs-toggle="transfer" data-bs-name={name} data-bs-counter-template={counterTemplate} style={style} {...rest}>
  {
    sides.map(({ side, title, items: rows }, index) => (
      <>
        <div class="card transfer-panel" data-bs-transfer-panel={side}>
          <div class="card-header">
            {selectAll ? (
              <label class="form-check mb-0">
                <input type="checkbox" class="form-check-input" data-bs-transfer-select-all />
                <span class="form-check-label fw-medium">{title}</span>
              </label>
            ) : (
              <h3 class="card-title">{title}</h3>
            )}
            <span class="transfer-counter" data-bs-transfer-counter />
          </div>
          {search && (
            <div class="card-body border-bottom py-2">
              <input type="search" class="form-control form-control-sm" placeholder={searchPlaceholder} aria-label={`Search in ${title}`} data-bs-transfer-search />
            </div>
          )}
          <div class="list-group list-group-flush transfer-list" aria-label={title} data-bs-transfer-list>
            {rows.map((item) => (
              <div class="list-group-item transfer-item" data-value={item.value} aria-disabled={item.disabled ? 'true' : undefined}>
                <input type="checkbox" class="form-check-input" />
                <span>{item.label}</span>
              </div>
            ))}
          </div>
        </div>
        {index === 0 && (
          <div class="transfer-actions">
            <button type="button" class="btn btn-icon" aria-label="Move selected to the right" data-bs-transfer-action="add">
              <Icon name="chevron-right" />
            </button>
            <button type="button" class="btn btn-icon" aria-label="Move selected to the left" data-bs-transfer-action="remove">
              <Icon name="chevron-left" />
            </button>
            <button type="button" class="btn btn-icon" aria-label="Move all to the right" data-bs-transfer-action="add-all">
              <Icon name="chevrons-right" />
            </button>
            <button type="button" class="btn btn-icon" aria-label="Move all to the left" data-bs-transfer-action="remove-all">
              <Icon name="chevrons-left" />
            </button>
            {reorder && (
              <>
                <button type="button" class="btn btn-icon" aria-label="Move selected up" data-bs-transfer-action="up">
                  <Icon name="chevron-up" />
                </button>
                <button type="button" class="btn btn-icon" aria-label="Move selected down" data-bs-transfer-action="down">
                  <Icon name="chevron-down" />
                </button>
              </>
            )}
          </div>
        )}
      </>
    ))
  }
</div>