export function normalizeUserIdentifier(input: string): string {
	console.log('Normalizing user identifier:', input);

	// Handle group JID format (120363418564126395@g.us)
	if (input.endsWith('@g.us')) {
		return input; // Return group JID as-is
	}

	// Handle user JID format (12345678@s.whatsapp.net)
	// if (input.includes('@s.whatsapp.net')) {
	//   const [phone, domain] = input.split('@');
	//   const cleanPhone = phone.replace(/\D/g, '');
	//   return `${cleanPhone}@${domain}`;
	// }
	if (input.includes('@s.whatsapp.net')) {
		return input.split('@')[0];
	}

	// Handle raw input (phone number or @mention)
	const cleanInput = input.startsWith('@') ? input.slice(1) : input;
	const phoneNumber = cleanInput.replace(/\D/g, '');

	// Validate phone number length
	if (phoneNumber.length < 8 || phoneNumber.length > 15) {
		throw new Error('Número de teléfono inválido');
	}

	const jid = `${phoneNumber}@s.whatsapp.net`;
	console.log('Normalized JID:', jid);
	return jid;
}

export function extractUserFromJid(jid: string): string {
	// Extract phone number from JID (format: 12345678@s.whatsapp.net)
	const phoneNumber = jid.split('@')[0];
	return normalizeUserIdentifier(phoneNumber);
}

export function formatUserMention(phoneNumber?: string): string {
	if (!phoneNumber) {
		return '@unknown';
	}

	// Handle full JID format
	if (phoneNumber.includes('@s.whatsapp.net')) {
		return `@${phoneNumber.split('@')[0]}`;
	}

	// Handle already formatted mentions
	if (phoneNumber.startsWith('@')) {
		return phoneNumber;
	}

	// Handle raw numbers
	return `@${phoneNumber.replace(/\D/g, '')}`;
}