---
// Self-contained carousel (.carousel). Default slot holds the .carousel-item elements
// (the caller marks the first one "active" — see CarouselCard.astro / hero/Side.astro);
// indicators/controls are generated from props. A "controls" slot overrides the default
// icon-span controls with custom markup (e.g. an <Icon>-based pair).

interface Props {
  id?: string
  /** slide count, used to generate indicator buttons */
  slideCount: number
  fade?: boolean
  /** data-bs-interval in ms, or false to disable autoplay */
  interval?: number | false
  indicators?: boolean
  indicatorsVariant?: 'dot' | 'thumb'
  indicatorsVertical?: boolean
  /** ratio ratio-4x3 on each indicator button, typically paired with indicatorsVariant="thumb" */
  indicatorsThumbRatio?: boolean
  /** background-image per slide, used when indicatorsVariant="thumb" */
  indicatorsImages?: string[]
  controls?: boolean
  class?: string
  /** remaining attributes forwarded to the element */
  [key: string]: unknown
}

const { id, slideCount, fade, interval, indicators, indicatorsVariant, indicatorsVertical, indicatorsThumbRatio, indicatorsImages, controls, class: className, ...rest } = Astro.props

const target = id ? `#${id}` : undefined
const slideIndexes = Array.from({ length: slideCount }, (_, i) => i)
const hasCustomControls = Astro.slots.has('controls')
---

<div id={id} class:list={['carousel', 'slide', fade && 'carousel-fade', className]} data-bs-ride="carousel" data-bs-interval={interval === false ? 'false' : interval} {...rest}>
  {
    indicators && (
      <div class:list={['carousel-indicators', indicatorsVertical && 'carousel-indicators-vertical', indicatorsVariant === 'dot' && 'carousel-indicators-dot', indicatorsVariant === 'thumb' && 'carousel-indicators-thumb']}>
        {slideIndexes.map((i) => (
          <button type="button" data-bs-target={target} data-bs-slide-to={i} class:list={[indicatorsThumbRatio && 'ratio ratio-4x3', i === 0 && 'active']} style={indicatorsVariant === 'thumb' && indicatorsImages?.[i] ? `background-image: url(${indicatorsImages[i]})` : undefined} />
        ))}
      </div>
    )
  }

  <div class="carousel-inner">
    <slot />
  </div>

  {
    hasCustomControls ? (
      <slot name="controls" />
    ) : (
      controls && (
        <Fragment>
          <a class="carousel-control-prev" href={target} role="button" data-bs-slide="prev">
            <span class="carousel-control-prev-icon" aria-hidden="true" />
            <span class="visually-hidden">Previous</span>
          </a>
          <a class="carousel-control-next" href={target} role="button" data-bs-slide="next">
            <span class="carousel-control-next-icon" aria-hidden="true" />
            <span class="visually-hidden">Next</span>
          </a>
        </Fragment>
      )
    )
  }
</div>