import { useState, useEffect } from 'react';
import { Link, useLocation, useSearchParams } from 'react-router-dom';
import { useAuth } from '../../hooks/useAuth';
import { useChannels } from '../../hooks/useChannels';
import { APPS } from '../../config/apps';
import { OptimizedImage } from '../OptimizedImage/OptimizedImage';

export function Navbar() {
	const { isAuthenticated, logout, isAdmin } = useAuth();
	const location = useLocation();
	const [searchParams, setSearchParams] = useSearchParams();
	const { channels } = useChannels();

	// Detect current app from registry
	const getCurrentApp = (pathname: string) => {
		return APPS.find(app => pathname === app.link || pathname.startsWith(app.link + '/'));
	};

	const currentApp = getCurrentApp(location.pathname);
	const isVideoApp = currentApp?.id === 'videos';
	const [searchInput, setSearchInput] = useState(searchParams.get('search') || '');

	// Sync search input with URL params
	useEffect(() => {
		setSearchInput(searchParams.get('search') || '');
	}, [searchParams]);

	const handleLogout = async () => {
		await logout();
	};

	const handleSearchSubmit = (e: React.FormEvent) => {
		e.preventDefault();
		const newParams = new URLSearchParams(searchParams);
		if (searchInput) {
			newParams.set('search', searchInput);
		} else {
			newParams.delete('search');
		}
		newParams.set('page', '1');
		setSearchParams(newParams);
	};

	const handleSortChange = (e: React.ChangeEvent<HTMLSelectElement>) => {
		const newParams = new URLSearchParams(searchParams);
		newParams.set('sort', e.target.value);
		newParams.set('page', '1');
		setSearchParams(newParams);
	};

	const handleChannelChange = (e: React.ChangeEvent<HTMLSelectElement>) => {
		const newParams = new URLSearchParams(searchParams);
		if (e.target.value) {
			newParams.set('channel', e.target.value);
		} else {
			newParams.delete('channel');
		}
		newParams.set('page', '1');
		setSearchParams(newParams);
	};

	const handleClearFilters = () => {
		setSearchInput('');
		setSearchParams(new URLSearchParams());
	};

	const hasFilters = searchParams.get('search') || searchParams.get('channel') ||
		(searchParams.get('sort') && searchParams.get('sort') !== 'newest');

	return (
		<>
			<header className="bg-white border-b-4 border-primary sticky top-0 z-50">
				<div className="max-w-5xl mx-auto px-4 py-5">
					<div className="flex items-center gap-3 justify-between">
						<Link to="/" className="flex items-center gap-3">
							<OptimizedImage
								src="/rainbow.png"
								alt="Rainbow"
								className="h-10 w-10 md:h-12 md:w-12 object-contain"
								width={48}
								height={48}
								loading="eager"
								fetchPriority="high"
							/>
							<h1 className="text-3xl md:text-4xl font-bold text-foreground" style={{ fontFamily: "'Butterfly Kids', cursive" }}>Rainbows, Cupcakes & Unicorns</h1>
							<OptimizedImage
								src="/cupcake.png"
								alt="Cupcake"
								className="h-10 w-10 md:h-12 md:w-12 object-contain"
								width={48}
								height={48}
								loading="eager"
								fetchPriority="high"
							/>
						</Link>

						<div className="flex items-center gap-3">
							<Link
								to="/"
								className={`text-sm font-semibold px-3 py-2 rounded-full transition-all active:scale-95 ${location.pathname === '/'
										? 'bg-primary text-primary-foreground shadow-md'
										: 'bg-white text-foreground border-2 border-primary hover:bg-pink-50'
									}`}
							>
								Home
							</Link>

							{!isAuthenticated && (
								<Link
									to="/register"
									className={`text-sm font-semibold px-3 py-2 rounded-full transition-all active:scale-95 ${location.pathname === '/register'
											? 'bg-primary text-primary-foreground shadow-md'
											: 'bg-white text-foreground border-2 border-primary hover:bg-pink-50'
										}`}
								>
									Sign In / Register
								</Link>
							)}

							{isAdmin && (
								<Link
									to="/admin"
									className={`text-sm font-semibold px-3 py-2 rounded-full transition-all active:scale-95 ${location.pathname.startsWith('/admin')
											? 'bg-primary text-primary-foreground shadow-md'
											: 'bg-white text-foreground border-2 border-primary hover:bg-pink-50'
										}`}
								>
									Admin
								</Link>
							)}

							{isAuthenticated && (
								<button
									onClick={handleLogout}
									className="px-4 py-2 bg-primary text-primary-foreground rounded-full font-semibold text-sm hover:bg-primary/90 transition-all active:scale-95 shadow-md"
								>
									Logout
								</button>
							)}
						</div>
					</div>
				</div>
			</header>

			{isVideoApp && (
				<div className="bg-muted border-b border-border">
					<div className="max-w-5xl mx-auto px-4 py-4">
						<div className="flex flex-col sm:flex-row gap-4 items-stretch sm:items-center">
							<form onSubmit={handleSearchSubmit} className="flex gap-2 flex-1 max-w-md">
								<input
									type="text"
									placeholder="Search videos..."
									value={searchInput}
									onChange={(e) => setSearchInput(e.target.value)}
									className="flex-1 px-4 py-2 border border-border rounded-full bg-white text-sm focus:outline-none focus:ring-2 focus:ring-primary focus:border-transparent"
								/>
								<button
									type="submit"
									className="px-4 py-2 bg-primary text-primary-foreground rounded-full hover:bg-primary/90 transition-colors text-sm font-semibold"
								>
									🔍
								</button>
							</form>

							<div className="flex gap-2 flex-wrap sm:flex-nowrap">
								<select
									value={searchParams.get('sort') || 'newest'}
									onChange={handleSortChange}
									className="px-4 py-2 border border-border rounded-full bg-white text-sm cursor-pointer focus:outline-none focus:ring-2 focus:ring-primary focus:border-transparent"
								>
									<option value="newest">Newest</option>
									<option value="oldest">Oldest</option>
									<option value="popular">Most Popular</option>
								</select>

								<select
									value={searchParams.get('channel') || ''}
									onChange={handleChannelChange}
									className="px-4 py-2 border border-border rounded-full bg-white text-sm cursor-pointer focus:outline-none focus:ring-2 focus:ring-primary focus:border-transparent"
								>
									<option value="">All Channels</option>
									{channels.map(channel => (
										<option key={channel.id} value={channel.id}>
											{channel.name}
										</option>
									))}
								</select>

								{hasFilters && (
									<button
										onClick={handleClearFilters}
										className="px-4 py-2 border border-border rounded-full bg-white text-sm hover:bg-muted transition-colors whitespace-nowrap"
									>
										Clear Filters
									</button>
								)}
							</div>
						</div>
					</div>
				</div>
			)}
		</>
	);
}