EventSnap/frontend/src/routes/upload/+page.svelte

<script lang="ts">
	import { goto } from '$app/navigation';
	import { getToken } from '$lib/auth';
	import { addToQueue, loadQueue } from '$lib/upload-queue';
	import { showBottomNav } from '$lib/ui-store';
	import { pendingFiles, pendingCaption, clearPending } from '$lib/pending-upload-store';
	import { get } from 'svelte/store';
	import { onMount, onDestroy } from 'svelte';
	import { quotaStore, refreshQuota } from '$lib/quota-store';
	import type { PendingFile } from '$lib/pending-upload-store';

	interface StagedFile extends PendingFile {
		// previewUrl and file inherited from PendingFile
	}

	let stagedFiles = $state<StagedFile[]>([]);
	let caption = $state('');
	let submitting = $state(false);
	let captionEl: HTMLTextAreaElement;

	const MAX_CAPTION_LENGTH = 2000;

	// Quick-tag chips derived from caption as the user types
	let captionTags = $derived.by(() => {
		const matches = [...caption.matchAll(/#(\w+)/g)];
		return [...new Set(matches.map((m) => m[1].toLowerCase()))];
	});

	onMount(() => {
		showBottomNav.set(false);
		if (!getToken()) {
			goto('/join');
			return;
		}
		loadQueue();
		void refreshQuota();

		// Pull staged files from the pending store (written by UploadSheet)
		const pf = get(pendingFiles);
		const pc = get(pendingCaption);
		stagedFiles = pf;
		caption = pc;

		// Auto-focus caption textarea after a short delay (let layout settle)
		setTimeout(() => captionEl?.focus(), 80);

		// Revoke blob URLs if user abandons the upload page
		const handleBeforeUnload = () => {
			clearPending();
		};
		window.addEventListener('beforeunload', handleBeforeUnload);

		return () => {
			window.removeEventListener('beforeunload', handleBeforeUnload);
		};
	});

	onDestroy(() => {
		showBottomNav.set(true);
	});

	function removeFile(idx: number) {
		const removed = stagedFiles[idx];
		URL.revokeObjectURL(removed.previewUrl);
		stagedFiles = stagedFiles.filter((_, i) => i !== idx);
	}

	function cancel() {
		clearPending();
		goto('/feed');
	}

	async function handleSubmit() {
		if (stagedFiles.length === 0 || submitting) return;
		if (caption.length > MAX_CAPTION_LENGTH) return;
		submitting = true;
		const hashtagsString = captionTags.join(',');
		for (const sf of stagedFiles) {
			await addToQueue(sf.file, caption, hashtagsString);
		}
		clearPending();
		goto('/feed');
	}

	function isVideo(file: File): boolean {
		return file.type.startsWith('video/');
	}

	function formatBytes(bytes: number | null | undefined): string {
		if (bytes == null || bytes <= 0) return '0 MB';
		const mb = bytes / (1024 * 1024);
		if (mb < 1024) return `${mb.toFixed(mb < 10 ? 1 : 0)} MB`;
		return `${(mb / 1024).toFixed(1)} GB`;
	}

	const totalStagedBytes = $derived(stagedFiles.reduce((sum, sf) => sum + sf.file.size, 0));
	const quotaPercent = $derived(
		$quotaStore.limit_bytes && $quotaStore.limit_bytes > 0
			? Math.min(100, (($quotaStore.used_bytes + totalStagedBytes) / $quotaStore.limit_bytes) * 100)
			: 0
	);
</script>

<!-- Full-screen composer — bottom nav is suppressed -->
<div class="flex min-h-screen flex-col bg-white dark:bg-gray-950">
	<!-- Header -->
	<div class="flex items-center justify-between border-b border-gray-100 px-4 py-3 dark:border-gray-800">
		<button
			onclick={cancel}
			class="flex h-9 w-9 items-center justify-center rounded-full text-gray-500 transition hover:bg-gray-100 dark:text-gray-400 dark:hover:bg-gray-800"
			aria-label="Abbrechen"
		>
			<svg class="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
				<path stroke-linecap="round" stroke-linejoin="round" d="M6 18 18 6M6 6l12 12" />
			</svg>
		</button>
		<h1 class="text-base font-semibold text-gray-900 dark:text-gray-100">Neuer Beitrag</h1>
		<!-- Submit button in header for desktop convenience -->
		<button
			onclick={handleSubmit}
			disabled={stagedFiles.length === 0 || submitting}
			data-testid="upload-submit-header"
			class="rounded-lg bg-blue-600 px-4 py-1.5 text-sm font-semibold text-white transition
				hover:bg-blue-700 disabled:opacity-40 dark:bg-blue-500 dark:hover:bg-blue-400"
		>
			{submitting ? 'Wird hochgeladen…' : 'Hochladen'}
		</button>
	</div>

	<div class="flex flex-1 flex-col overflow-y-auto">
		<!-- Thumbnail strip -->
		{#if stagedFiles.length > 0}
			<div class="flex gap-2 overflow-x-auto px-4 py-3 scrollbar-none">
				{#each stagedFiles as sf, i}
					<div class="relative h-20 w-20 shrink-0 overflow-hidden rounded-xl bg-gray-100 dark:bg-gray-800">
						{#if isVideo(sf.file)}
							<div class="flex h-full w-full items-center justify-center bg-gray-800 dark:bg-gray-700">
								<svg class="h-7 w-7 text-white/70" fill="currentColor" viewBox="0 0 24 24">
									<path d="M8 5v14l11-7z" />
								</svg>
							</div>
						{:else}
							<img src={sf.previewUrl} alt="" class="h-full w-full object-cover" />
						{/if}
						<button
							onclick={() => removeFile(i)}
							class="absolute right-1 top-1 flex h-5 w-5 items-center justify-center rounded-full bg-black/60 text-white"
							aria-label="Entfernen"
						>
							<svg class="h-3 w-3" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="3">
								<path stroke-linecap="round" stroke-linejoin="round" d="M6 18 18 6M6 6l12 12" />
							</svg>
						</button>
					</div>
				{/each}
			</div>
			<div class="border-b border-gray-100 dark:border-gray-800"></div>
		{:else}
			<!-- No files: prompt to go back and pick some -->
			<div class="flex flex-1 flex-col items-center justify-center gap-4 p-8 text-center">
				<svg class="h-16 w-16 text-gray-200 dark:text-gray-700" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="1">
					<path stroke-linecap="round" stroke-linejoin="round" d="M2.25 15.75l5.159-5.159a2.25 2.25 0 013.182 0l5.159 5.159m-1.5-1.5l1.409-1.409a2.25 2.25 0 013.182 0l2.909 2.909M9 9.75h.008v.008H9V9.75zm.375 0a.375.375 0 11-.75 0 .375.375 0 01.75 0zM6 20.25h12A2.25 2.25 0 0020.25 18V6A2.25 2.25 0 0018 3.75H6A2.25 2.25 0 003.75 6v12A2.25 2.25 0 006 20.25z" />
				</svg>
				<div>
					<p class="font-medium text-gray-500 dark:text-gray-400">Keine Dateien ausgewählt</p>
					<p class="mt-1 text-sm text-gray-400 dark:text-gray-500">Geh zurück und tippe auf den Plus-Button.</p>
				</div>
				<button
					onclick={cancel}
					class="rounded-lg border border-gray-300 px-4 py-2 text-sm font-medium text-gray-700 hover:bg-gray-50 dark:border-gray-700 dark:text-gray-300 dark:hover:bg-gray-800"
				>
					Zurück
				</button>
			</div>
		{/if}

		<!-- Caption textarea -->
		<div class="px-4 pt-4">
			<textarea
				bind:this={captionEl}
				bind:value={caption}
				maxlength={MAX_CAPTION_LENGTH}
				data-testid="upload-caption"
				placeholder="Beschreibung hinzufügen… (#hashtags möglich)"
				rows="4"
				class="w-full resize-none rounded-xl border border-gray-200 bg-gray-50 px-4 py-3 text-sm text-gray-900
					placeholder-gray-400 focus:border-blue-400 focus:bg-white focus:outline-none focus:ring-1 focus:ring-blue-200
					dark:border-gray-700 dark:bg-gray-800 dark:text-gray-100 dark:placeholder-gray-500 dark:focus:bg-gray-800"
			></textarea>
			<div class="mt-1 text-xs text-gray-500 text-right dark:text-gray-400">
				{caption.length} / {MAX_CAPTION_LENGTH}
			</div>
		</div>

		<!-- Quick-tag chips (derived from typed caption) -->
		{#if captionTags.length > 0}
			<div class="flex flex-wrap gap-1.5 px-4 pt-2">
				{#each captionTags as tag}
					<span class="rounded-full bg-blue-50 px-2.5 py-0.5 text-xs font-medium text-blue-600 dark:bg-blue-950/40 dark:text-blue-300">
						#{tag}
					</span>
				{/each}
			</div>
		{/if}

		<!-- Per-user quota — hidden when admin disabled enforcement -->
		{#if $quotaStore.enabled && $quotaStore.limit_bytes != null}
			<div class="px-4 pt-3 text-xs text-gray-500 dark:text-gray-400">
				<div class="flex items-center justify-between">
					<span>Speicher: {formatBytes($quotaStore.used_bytes + totalStagedBytes)} / {formatBytes($quotaStore.limit_bytes)}</span>
					<span class:text-amber-600={quotaPercent >= 80} class:dark:text-amber-400={quotaPercent >= 80} class:text-red-600={quotaPercent >= 95} class:dark:text-red-400={quotaPercent >= 95}>
						{Math.round(quotaPercent)}%
					</span>
				</div>
				<div class="mt-1 h-1.5 overflow-hidden rounded-full bg-gray-100 dark:bg-gray-800">
					<div
						class="h-full transition-all"
						class:bg-blue-500={quotaPercent < 80}
						class:bg-amber-500={quotaPercent >= 80 && quotaPercent < 95}
						class:bg-red-500={quotaPercent >= 95}
						style="width: {quotaPercent}%"
					></div>
				</div>
			</div>
		{/if}

		<div class="h-8"></div>
	</div>

	<!-- Sticky submit button at bottom (mobile-primary) -->
	<div class="border-t border-gray-100 px-4 py-3 dark:border-gray-800">
		<button
			onclick={handleSubmit}
			disabled={stagedFiles.length === 0 || submitting}
			data-testid="upload-submit"
			class="flex w-full items-center justify-center gap-2 rounded-xl bg-blue-600 py-3.5 text-sm font-semibold
				text-white transition hover:bg-blue-700 active:scale-[0.98] disabled:opacity-40 dark:bg-blue-500 dark:hover:bg-blue-400"
		>
			{#if submitting}
				<svg class="h-4 w-4 animate-spin" fill="none" viewBox="0 0 24 24">
					<circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
					<path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z"></path>
				</svg>
				Wird hochgeladen…
			{:else}
				<svg class="h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="2">
					<path stroke-linecap="round" stroke-linejoin="round" d="M3 16.5v2.25A2.25 2.25 0 005.25 21h13.5A2.25 2.25 0 0021 18.75V16.5m-13.5-9L12 3m0 0l4.5 4.5M12 3v13.5" />
				</svg>
				{stagedFiles.length > 0 ? `${stagedFiles.length} Datei${stagedFiles.length > 1 ? 'en' : ''} hochladen` : 'Hochladen'}
			{/if}
		</button>
	</div>
</div>