import { type ClassValue, clsx } from 'clsx';
import { twMerge } from 'tailwind-merge';

/**
 * Merge Tailwind CSS classes with proper precedence
 */
export function cn(...inputs: ClassValue[]) {
	return twMerge(clsx(inputs));
}

/**
 * Format a date to a human-readable string
 */
export function formatDate(date: Date | string, options?: Intl.DateTimeFormatOptions): string {
	const d = typeof date === 'string' ? new Date(date) : date;
	return d.toLocaleDateString('en-US', {
		year: 'numeric',
		month: 'long',
		day: 'numeric',
		...options
	});
}

/**
 * Format currency amount
 */
export function formatCurrency(amount: number, currency = 'EUR'): string {
	return new Intl.NumberFormat('en-US', {
		style: 'currency',
		currency
	}).format(amount);
}

/**
 * Generate a random ID
 */
export function generateId(prefix = ''): string {
	const id = Math.random().toString(36).substring(2, 9);
	return prefix ? `${prefix}_${id}` : id;
}

/**
 * Debounce a function
 */
export function debounce<T extends (...args: unknown[]) => unknown>(
	fn: T,
	delay: number
): (...args: Parameters<T>) => void {
	let timeoutId: ReturnType<typeof setTimeout>;
	return (...args: Parameters<T>) => {
		clearTimeout(timeoutId);
		timeoutId = setTimeout(() => fn(...args), delay);
	};
}

/**
 * Check if running in browser
 */
export const isBrowser = typeof window !== 'undefined';