'use client'

import { useTranslations } from 'next-intl';
import { IconCheck, IconArrowLeft, IconArrowRight, IconDoubleArrowLeft, IconDoubleArrowRight } from '@/app/ui/icons/icons';
import { useEffect, useState } from 'react';
import { useAllNotifications } from '@/app/hooks/react-query/useAllNotificationsList';
import { notificationsMarkAsRead, notificationsDelete } from '@/app/actions/notificationActions';
import { useQueryClient } from '@tanstack/react-query';
import { formatDate, formatDateTime } from '@/app/lib/formatDate';

export function NotificationsList() {
	const t = useTranslations('Global');
	const queryClient = useQueryClient();

	const [selectedFiles, setSelectedFiles] = useState<Set<number>>(new Set());
	const [loadingIds, setLoadingIds] = useState<Set<number>>(new Set());
	const [error, setError] = useState<string | null>(null);
	const [currentPage, setCurrentPage] = useState(0);
	const [pageSize] = useState(10);
	const { data: allNotifications, isLoading } = useAllNotifications(currentPage, pageSize);


	const totalPages = allNotifications?.totalPages || 0;
	const currentPageNum = allNotifications?.currentPage || 0;

	const goToFirstPage = () => setCurrentPage(0);
	const goToPrevPage = () => setCurrentPage(prev => Math.max(0, prev - 1));
	const goToNextPage = () => setCurrentPage(prev => Math.min(totalPages - 1, prev + 1));
	const goToLastPage = () => setCurrentPage(totalPages - 1);
	const goToPage = (page: number) => setCurrentPage(page);

	const getPageNumbers = (): (number | string)[] => {
		const delta: number = 2;
		const range: number[] = [];
		const rangeWithDots: (number | string)[] = [];
		let l: number | undefined;

		for (let i = 0; i < totalPages; i++) {
			if (i === 0 || i === totalPages - 1 || (i >= currentPageNum - delta && i <= currentPageNum + delta)) {
				range.push(i);
			}
		}

		range.forEach((i: number) => {
			if (l !== undefined) {
				if (i - l === 2) {
					rangeWithDots.push(l + 1);
				} else if (i - l !== 1) {
					rangeWithDots.push('...');
				}
			}
			rangeWithDots.push(i);
			l = i;
		});

		return rangeWithDots;
	};

	useEffect(() => {
		console.log(allNotifications);
	}, [allNotifications])

	function selectHandler(fileId: number) {
		setSelectedFiles((prev) => {
			const newSet = new Set(prev);

			if (newSet.has(fileId)) {
				newSet.delete(fileId)
			} else {
				newSet.add(fileId)
			}
			return newSet;
		});
	}

	function clearHandler() {
		setSelectedFiles(new Set());
	}

	function selectAllHandler() {
		setSelectedFiles(new Set(allNotifications?.notifications.map(item => item.id)));
	}

	async function notificationActionHandler(ids: number[], action: 'remove' | 'mark-as-read') {
		setLoadingIds(prev => {
			const newSet = new Set(prev);
			ids.forEach(id => newSet.add(id));
			return newSet;
		});

		try {
			let response;

			if (action === 'mark-as-read') {
				response = await notificationsMarkAsRead(ids);
			} else if (action === 'remove') {
				response = await notificationsDelete(ids);
			}

			if (response?.success) {
				await queryClient.invalidateQueries({ queryKey: ['activeNotifications'] });
				await queryClient.invalidateQueries({ queryKey: ['allNotifications'] });
			}
		} catch (error) {
			const errorMessage = action === 'mark-as-read' ? 'Failed to mark as read' : 'Failed to remove';
			setError(errorMessage);
		} finally {
			setLoadingIds(prev => {
				const newSet = new Set(prev);
				ids.forEach(id => newSet.delete(id));
				return newSet;
			});

			setSelectedFiles(prev => {
				const newSet = new Set(prev);
				ids.forEach(id => newSet.delete(id));
				return newSet;
			});
		}
	}

	return (
		<div
			className="notifications-list-wrapper"
		>
			<div
				className="notifications-list-header"
			>
				<h4>
					{t('all-notifications')}
				</h4>

				<div
					className="notifications-list-action"
				>
					{(selectedFiles.size !== 0) && (
						<>
							<button
								className="btn btn-primary"
								onClick={() => {
									clearHandler();
								}}
							>
								{t('deselect')}
							</button>

							<button
								className="btn btn-primary"
								onClick={() => {
									const array = Array.from(selectedFiles);
									notificationActionHandler(array, 'mark-as-read');
								}}
							>
								{t('mark-as-read')}
							</button>
						</>
					)}
					<button
						className="btn btn-primary"
						onClick={() => {
							selectAllHandler();
						}}
					>
						{t('select-all')}
					</button>
				</div>
			</div>
			<div
				className="notifications-list-body"
			>
				{(allNotifications?.notifications.length !== 0) && (
					allNotifications?.notifications.map(item => {
						return (
							<div
								className={`notification-item ${loadingIds.has(item.id) ? 'loading' : ''} ${item.status}`}
								key={item.id}
							>
								<div
									className="notification-check"
								>
									<button
										onClick={() => {
											selectHandler(item.id);
										}}
									>
										{selectedFiles.has(item.id) && (
											<IconCheck />
										)}
									</button>
								</div>

								<div
									className="notification-body"
								>
									<div
										className="notification-header"
									>
										<div
											className="notification-title"
										>
											{item.type} {item.id}
										</div>
										{/* 										<div
											className="notification-status"
										>
											{item.status}
										</div> */}
									</div>
									<div
										className="notification-text"
									>
										{item.message}
									</div>
									<div
										className="notification-footer"
									>
										<div
											className="notification-date"
										>
											{item.createdAt ? `${formatDate(item.createdAt)}: ${formatDateTime(item.createdAt)}` : '---'}
										</div>

										<button
											className="btn btn-remove"
											onClick={() => {
												notificationActionHandler([item.id], 'remove');
											}}
											disabled={loadingIds.has(item.id)}
										>
											{t('remove')}
										</button>
									</div>
								</div>
							</div>
						)
					})
				)}
			</div>

			<div
				className="notifications-list-footer"
			>
				{totalPages > 0 && (
					<div className="pagination-controls">
						<button
							className="arrow"
							onClick={goToFirstPage}
							disabled={currentPageNum === 0}
						>
							<IconDoubleArrowLeft />
						</button>
						<button
							onClick={goToPrevPage}
							className="arrow"
							disabled={currentPageNum === 0}
						>
							<IconArrowLeft />
						</button>

						<div className="pagination-controls-pages">
							{getPageNumbers().map((pageNum, index) => (
								<button
									key={index}
									onClick={() => typeof pageNum === 'number' && goToPage(pageNum)}
									className={currentPageNum === pageNum ? 'current' : 'other'}
									disabled={pageNum === '...'}
								>
									{pageNum === '...' ? '...' : (pageNum as number) + 1}
								</button>
							))}
						</div>

						<button
							onClick={goToNextPage}
							className="arrow"
							disabled={currentPageNum === totalPages - 1}
						>
							<IconArrowRight />
						</button>
						<button
							className="arrow"
							onClick={goToLastPage}
							disabled={currentPageNum === totalPages - 1}
						>
							<IconDoubleArrowRight />
						</button>
					</div>
				)}
			</div>
		</div>
	)
}