component Collapse {
  outputs {
    toggle(payload: { index: number; item: string | number | boolean | null | object; open: boolean; openIndexes: number[] })
    open(payload: { index: number; item: string | number | boolean | null | object })
    close(payload: { index: number; item: string | number | boolean | null | object })
  }

  props {
size: string = "default"
    color: string = "primary"
    items: unknown[] = []
    multiple: boolean = false
    mode: string = "panel"
    initialOpenIndexes: unknown[] = []
    ariaLabel: string = "Collapsible content"
    class: string = ""
  }

  state openIndexes = initialOpenIndexes

  functions {
    shared function isOpen(index) {
      return openIndexes.includes(index)
    }

    client function toggleItem(index, item, opening) {
      if (item.disabled) {
        return
      }
      opening = !isOpen(index)
      if (opening) {
        if (multiple) {
          openIndexes = openIndexes.concat(index)
        } else {
          openIndexes = [index]
        }
        output.open({ index: index, item: item })
      } else {
        openIndexes = openIndexes.filter((openIndex) => openIndex !== index)
        output.close({ index: index, item: item })
      }
      output.toggle({
        index: index,
        item: item,
        open: opening,
        openIndexes: openIndexes
      })
    }
  }

  view {
    <section
      {...attrs}
      class="wire-next wire-next--color-{color} wire-next--size-{size} wire-next--collapse {class}"
      data-mode="{mode}"
      aria-label="{ariaLabel}"
    >
      {#each items as item, index}
        <article class="wire-next__collapse-item" data-open="{isOpen(index)}">
          {#if mode === "inline" && item.preview}
            <p class="wire-next__collapse-preview">{item.preview}</p>
          {/if}

          <button
            class="wire-next__collapse-trigger"
            type="button"
            aria-expanded="{isOpen(index) ? 'true' : 'false'}"
            aria-controls="{item.id || 'collapse-panel-' + index}"
            disabled="{item.disabled}"
            @click="toggleItem(index, item)"
          >
            <span>{isOpen(index) ? (item.closeLabel || "Read less") : item.label}</span>
            <span class="icon-[lucide--chevron-down] wire-next__collapse-chevron" aria-hidden="true"></span>
          </button>

          <div
            id="{item.id || 'collapse-panel-' + index}"
            class="wire-next__collapse-panel"
            data-open="{isOpen(index)}"
            aria-hidden="{isOpen(index) ? 'false' : 'true'}"
            inert="{!isOpen(index)}"
          >
            <div class="wire-next__collapse-content">
              {#if item.title}<h4>{item.title}</h4>{/if}
              {#if item.content}<p>{item.content}</p>{/if}
              {#if item.links && item.links.length}
                <nav aria-label="Related links">
                  {#each item.links as link}<a href="{link.href || '#'}">{link.label}</a>{/each}
                </nav>
              {/if}
            </div>
          </div>
        </article>
      {/each}
      <slot />
    </section>
  }
}