<script lang="ts">
	// Simplest transition: render whatever the parent gave us, full-bleed, with a CSS
	// opacity fade. Tied to the parent's `{#key}` block — when the src changes, the
	// parent re-mounts this component and the `in:` transition runs.

	interface Props {
		src: string;
		isVideo: boolean;
		durationMs: number;
		/** Fired when a video slide finishes so the parent can advance early. */
		onended?: () => void;
	}

	let { src, isVideo, durationMs, onended }: Props = $props();
</script>

<!-- The fade lives in a scoped class (not an inline `style="animation:…"`): Svelte scopes
	 `@keyframes` names and only rewrites `animation` references inside this <style> block —
	 an inline animation name stays unscoped and silently never matches, so the fade would
	 never run. The dynamic duration is passed through as a CSS custom property instead. -->
<div
	class="slide absolute inset-0 flex items-center justify-center bg-black"
	style="--fade-dur: {durationMs}ms"
>
	{#if isVideo}
		<!-- svelte-ignore a11y_media_has_caption -->
		<video {src} autoplay muted playsinline {onended} class="h-full w-full object-contain"></video>
	{:else}
		<img {src} alt="" class="h-full w-full object-contain" />
	{/if}
</div>

<style>
	.slide {
		animation: crossfade-in var(--fade-dur, 400ms) ease-out forwards;
	}
	@keyframes crossfade-in {
		from {
			opacity: 0;
		}
		to {
			opacity: 1;
		}
	}
</style>
