'use client';

import { useState, useEffect } from 'react';
import { Dialog, DialogContent, DialogHeader, DialogTitle } from '@/components/ui/dialog';
import { Button } from '@/components/ui/button';
import { Badge } from '@/components/ui/badge';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Bell, X, AlertCircle, Info, AlertTriangle } from 'lucide-react';
import { useToast } from '@/hooks/use-toast';

interface Announcement {
	id: string;
	title: string;
	content: string;
	priority: 'low' | 'medium' | 'high';
	isActive: boolean;
	createdAt: string;
}

interface AnnouncementsProps {
	isOpen: boolean;
	onClose: () => void;
	unreadCount: number;
	onCountUpdate: (count: number) => void;
}

export function AnnouncementsModal({ isOpen, onClose, unreadCount, onCountUpdate }: AnnouncementsProps) {
	const [announcements, setAnnouncements] = useState<Announcement[]>([]);
	const [loading, setLoading] = useState(false);
	const { toast } = useToast();

	useEffect(() => {
		if (isOpen) {
			fetchAnnouncements();
		}
	}, [isOpen]);

	const fetchAnnouncements = async () => {
		setLoading(true);
		try {
			const response = await fetch('/api/announcements');
			if (response.ok) {
				const data = await response.json();
				setAnnouncements(data.announcements || []);
				onCountUpdate(data.unreadCount || 0);
			} else {
				toast({
					title: 'Error',
					description: 'Failed to fetch announcements',
					variant: 'destructive',
				});
			}
		} catch (error) {
			console.error('Error fetching announcements:', error);
			toast({
				title: 'Error',
				description: 'Failed to fetch announcements',
				variant: 'destructive',
			});
		} finally {
			setLoading(false);
		}
	};

	const getPriorityIcon = (priority: string) => {
		switch (priority) {
			case 'high':
				return <AlertCircle className='h-4 w-4 text-destructive' />;
			case 'medium':
				return <AlertTriangle className='h-4 w-4 text-amber-500 dark:text-amber-400' />;
			default:
				return <Info className='h-4 w-4 text-primary' />;
		}
	};

	const getPriorityColor = (priority: string) => {
		switch (priority) {
			case 'high':
				return 'border-destructive/20 bg-destructive/5';
			case 'medium':
				return 'border-amber-500/20 bg-amber-500/5 dark:border-amber-400/20 dark:bg-amber-400/5';
			default:
				return 'border-primary/20 bg-primary/5';
		}
	};

	const formatDate = (dateStr: string) => {
		return new Date(dateStr).toLocaleDateString('en-IE', {
			year: 'numeric',
			month: 'short',
			day: 'numeric',
			hour: '2-digit',
			minute: '2-digit',
		});
	};

	return (
		<Dialog open={isOpen} onOpenChange={onClose}>
			<DialogContent className='sm:max-w-2xl max-h-[80vh] overflow-hidden flex flex-col'>
				<DialogHeader>
					<DialogTitle className='flex items-center gap-2'>
						<Bell className='h-5 w-5' />
						Announcements
						{unreadCount > 0 && (
							<Badge variant='destructive' className='text-xs'>
								{unreadCount}
							</Badge>
						)}
					</DialogTitle>
				</DialogHeader>

				<div className='flex-1 overflow-y-auto'>
					{loading ? (
						<div className='flex items-center justify-center py-8'>
							<div className='animate-spin rounded-full h-8 w-8 border-b-2 border-foreground'></div>
							<p className='ml-2 text-foreground'>Loading announcements...</p>
						</div>
					) : announcements.length === 0 ? (
						<div className='text-center py-8 text-muted-foreground'>
							<Bell className='h-12 w-12 mx-auto mb-4 text-muted-foreground/50' />
							<p>No announcements at this time</p>
						</div>
					) : (
						<div className='space-y-4'>
							{announcements.map((announcement) => (
								<Card
									key={announcement.id}
									className={`${getPriorityColor(announcement.priority)} border-l-4`}
								>
									<CardHeader className='pb-2'>
										<CardTitle className='flex items-center gap-2 text-base'>
											{getPriorityIcon(announcement.priority)}
											{announcement.title}
											<Badge variant='outline' className='ml-auto text-xs'>
												{announcement.priority}
											</Badge>
										</CardTitle>
									</CardHeader>
									<CardContent className='pt-0'>
										<p className='text-sm text-foreground mb-2'>{announcement.content}</p>
										<p className='text-xs text-muted-foreground'>
											{formatDate(announcement.createdAt)}
										</p>
									</CardContent>
								</Card>
							))}
						</div>
					)}
				</div>

				<div className='flex justify-end pt-4 border-t'>
					<Button onClick={onClose} variant='outline'>
						Close
					</Button>
				</div>
			</DialogContent>
		</Dialog>
	);
}

// Bell button component for header
interface NotificationBellProps {
	unreadCount: number;
	onClick: () => void;
}

export function NotificationBell({ unreadCount, onClick }: NotificationBellProps) {
	return (
		<Button variant='ghost' size='sm' onClick={onClick} className='relative'>
			<Bell className='h-4 w-4' />
			{unreadCount > 0 && (
				<Badge
					variant='destructive'
					className='absolute -top-1 -right-1 h-5 w-5 flex items-center justify-center text-xs p-0 min-w-[20px]'
				>
					{unreadCount > 99 ? '99+' : unreadCount}
				</Badge>
			)}
		</Button>
	);
}