import { differenceInDays, differenceInMinutes, format } from "date-fns";
import { Paperclip } from "lucide-react";
import Link from "next/link";
import { ExtIcon } from "~/components/area-riservata/allegati";
import {
	Credenza,
	CredenzaBody,
	CredenzaClose,
	CredenzaContent,
	CredenzaDescription,
	CredenzaFooter,
	CredenzaHeader,
	CredenzaTitle,
	CredenzaTrigger,
} from "~/components/custom_ui/credenza";
import { LoadingPage } from "~/components/loading";
import { Button, buttonVariants } from "~/components/ui/button";
import { UploadComponent } from "~/components/upload_modal";
import { cn } from "~/lib/utils";
import { useChatContext } from "~/providers/ChatProvider";
import { useTranslation } from "~/providers/I18nProvider";
import { api } from "~/utils/api";

export const ChatAttachments = () => {
	const { session, userinfo } = useChatContext();
	const { t } = useTranslation();
	const {
		data: attachments,
		isLoading: attachmentsLoading,
		refetch,
	} = api.storage.retrieveUserFileData.useQuery(
		{ userId: userinfo.id },
		{ refetchOnMount: true },
	);

	return (
		<Credenza onOpenChange={(o) => o && refetch()}>
			<CredenzaTrigger asChild>
				<Button
					aria-label="Allegati Chat"
					className="relative size-9"
					size="icon"
					variant="ghost"
				>
					{attachments && attachments.length > 0 && (
						<span className="absolute -top-1 right-0 rounded-full bg-blue-500 px-1 font-bold text-white text-xs">
							{attachments.length}
						</span>
					)}
					<Paperclip className="text-muted-foreground" size={20} />
				</Button>
			</CredenzaTrigger>
			<CredenzaContent className="max-h-[90vh] md:max-w-xl">
				<CredenzaHeader>
					<CredenzaTitle className="sr-only">Allegati</CredenzaTitle>
					<CredenzaDescription className="sr-only">
						Chat Attachments
					</CredenzaDescription>
				</CredenzaHeader>
				<CredenzaBody className="max-h-[80vh] space-y-5 overflow-auto pb-5 md:px-1">
					<UploadComponent isAdmin={session.isAdmin} userId={userinfo.id} />

					<div className="h-auto max-h-160 max-w-lg overflow-auto rounded-lg">
						{attachmentsLoading ? (
							<LoadingPage />
						) : (
							<>
								{!attachments || attachments.length === 0 ? (
									<div className="flex h-full items-center justify-center">
										<p className="text-center font-semibold text-gray-500 text-lg">
											{t.allegati.nessun_allegato}
										</p>
									</div>
								) : (
									<ul className="px-2">
										<h3 className="font-semibold text-gray-700 text-lg">
											{t.allegati.allegati_recenti}
										</h3>
										{attachments?.map((file, idx) => {
											if (idx >= 3) return null;

											return (
												<li
													className="flex flex-row items-center justify-between border-b py-1"
													key={`${file.originalName}-${
														// biome-ignore lint/suspicious/noArrayIndexKey: <ok>
														idx
													}`}
												>
													<Link
														aria-label="Visualizza Allegato"
														href={`/area-riservata/allegato-view/${file.id}`}
														onTouchStart={() => console.log("touching")}
														target="_blank"
													>
														<Button
															className="h-8 truncate p-0 text-base has-[>svg]:px-0"
															variant="link"
														>
															<ExtIcon mimeType={file.mimeType} />
															<span className="max-w-[60vw] truncate">
																{file.originalName}
															</span>
														</Button>
													</Link>
													<span
														className="text-muted-foreground text-xs"
														key={new Date().toString()}
													>
														{TimeSince(new Date(file.uploadedAt))}
													</span>
												</li>
											);
										})}
									</ul>
								)}
							</>
						)}
					</div>
					<Link
						aria-label="Visualizza Allegati"
						className={cn(
							buttonVariants({
								variant: "outline",
							}),
							"relative w-full",
						)}
						href="/area-riservata/allegati"
					>
						<Paperclip /> {t.allegati.i_tuoi_allegati}
						{attachments && attachments.length > 0 && (
							<span className="absolute -top-1 -right-1 flex size-5 items-center justify-center rounded-full bg-red-600 text-white text-xs">
								{attachments.length}
							</span>
						)}
					</Link>
				</CredenzaBody>
				<CredenzaFooter className="flex flex-col items-center justify-between gap-2">
					<CredenzaClose asChild>
						<Button className="w-full">{t.chiudi}</Button>
					</CredenzaClose>
				</CredenzaFooter>
			</CredenzaContent>
		</Credenza>
	);
};

const TimeSince = (date: Date) => {
	const minsSince = Math.abs(differenceInMinutes(date, new Date()));
	const daysSince = Math.abs(differenceInDays(date, new Date()));

	const relevantMinsIncrements = [1, 3, 5, 10, 15, 30, 60, 120];

	if (daysSince === 0) {
		if (minsSince < 1) {
			return "ora";
		}

		const closestToNow = relevantMinsIncrements.reduce((prev, curr) => {
			return Math.abs(curr - minsSince) < Math.abs(prev - minsSince)
				? curr
				: prev;
		});

		if (closestToNow === 60) {
			return "~1 ora fa";
		}

		if (closestToNow === 120 && minsSince < 121) {
			return "~2 ore fa";
		}

		return `~${closestToNow} min fa`;
	}

	if (daysSince === 1) {
		return "ieri";
	}

	if (daysSince < 30) {
		return `${daysSince} giorni fa`;
	}

	return format(date, "dd/MM/yyyy");
};