<script lang="ts">
	import { getContext, onMount, tick } from 'svelte';
	import Modal from '$lib/components/common/Modal.svelte';
	import Tooltip from '$lib/components/common/Tooltip.svelte';

	const i18n = getContext('i18n');

	export let show = false;
	export let citation;

	let mergedDocuments = [];

	function calculatePercentage(distance) {
		if (distance < 0) return 100;
		if (distance > 1) return 0;
		return Math.round((1 - distance) * 100);
	}

	function shouldShowPercentage(documents) {
		const validDistances = documents.filter(
			(d) => d.distance !== undefined && d.distance >= 0 && d.distance <= 1
		);
		return validDistances.length >= 2;
	}

	$: showPercentage = shouldShowPercentage(mergedDocuments);

	$: if (citation) {
		mergedDocuments = citation.document?.map((c, i) => {
			return {
				source: citation.source,
				document: c,
				metadata: citation.metadata?.[i],
				distance: citation.distances?.[i]
			};
		});
		if (mergedDocuments.every((doc) => doc.distance !== undefined)) {
			mergedDocuments.sort((a, b) => (a.distance ?? Infinity) - (b.distance ?? Infinity));
		}
	}
</script>

<Modal size="lg" bind:show>
	<div>
		<div class=" flex justify-between dark:text-gray-300 px-5 pt-4 pb-2">
			<div class=" text-lg font-medium self-center capitalize">
				{$i18n.t('Citation')}
			</div>
			<button
				class="self-center"
				on:click={() => {
					show = false;
				}}
			>
				<svg
					xmlns="http://www.w3.org/2000/svg"
					viewBox="0 0 20 20"
					fill="currentColor"
					class="w-5 h-5"
				>
					<path
						d="M6.28 5.22a.75.75 0 00-1.06 1.06L8.94 10l-3.72 3.72a.75.75 0 101.06 1.06L10 11.06l3.72 3.72a.75.75 0 101.06-1.06L11.06 10l3.72-3.72a.75.75 0 00-1.06-1.06L10 8.94 6.28 5.22z"
					/>
				</svg>
			</button>
		</div>

		<div class="flex flex-col md:flex-row w-full px-6 pb-5 md:space-x-4">
			<div
				class="flex flex-col w-full dark:text-gray-200 overflow-y-scroll max-h-[22rem] scrollbar-hidden"
			>
				{#each mergedDocuments as document, documentIdx}
					<div class="flex flex-col w-full">
						<div class="text-sm font-medium dark:text-gray-300">
							{$i18n.t('Source')}
						</div>

						{#if document.source?.name}
							<Tooltip
								content={$i18n.t('Open file')}
								placement="left"
								tippyOptions={{ duration: [500, 0], animation: 'perspective' }}
							>
								<div class="text-sm dark:text-gray-400 flex items-center gap-2">
									<a
										class="hover:text-gray-500 hover:dark:text-gray-100 underline flex-grow"
										href={document?.metadata?.file_id
											? `/api/v1/files/${document?.metadata?.file_id}/content${document?.metadata?.page !== undefined ? `#page=${document.metadata.page + 1}` : ''}`
											: document.source.name.includes('http')
												? document.source.name
												: `#`}
										target="_blank"
									>
										{document?.metadata?.name ?? document.source.name}
									</a>
									{#if document?.metadata?.page}
										<span class="text-xs text-gray-500 dark:text-gray-400">
											({$i18n.t('page')}
											{document.metadata.page + 1})
										</span>
									{/if}
								</div>
							</Tooltip>
							{#if document.distance !== undefined}
								<div class="text-sm font-medium dark:text-gray-300 mt-2">
									{$i18n.t('Relevance')}
								</div>
								{#if showPercentage}
									{@const percentage = calculatePercentage(document.distance)}
									<div class="text-sm my-1 dark:text-gray-400 flex items-center gap-2">
										<span class={`px-1 rounded font-medium ${getRelevanceColor(percentage)}`}>
											{percentage}%
										</span>
										<span class="text-gray-500 dark:text-gray-500"
											>({document.distance.toFixed(4)})</span
										>
									</div>
								{:else}
									<div class="text-sm my-1 dark:text-gray-400 flex items-center gap-2">
										<span class="text-gray-500 dark:text-gray-500">
											{document.distance.toFixed(4)}
										</span>
									</div>
								{/if}
							{/if}
						{:else}
							<div class="text-sm dark:text-gray-400">
								{$i18n.t('No source available')}
							</div>
						{/if}
					</div>
					<div class="flex flex-col w-full">
						<div class=" text-sm font-medium dark:text-gray-300">
							{$i18n.t('Content')}
						</div>
						<pre class="text-sm dark:text-gray-400 whitespace-pre-line">
							{document.document}
						</pre>
					</div>

					{#if documentIdx !== mergedDocuments.length - 1}
						<hr class=" dark:border-gray-850 my-3" />
					{/if}
				{/each}
			</div>
		</div>
	</div>
</Modal>
