/* jslint node: true */
'use strict';

const Address				= require('./ftn_address.js');
const Message				= require('./message.js');

exports.getAddressedToInfo	= getAddressedToInfo;

const EMAIL_REGEX = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;

/*
	Input                              Output
	----------------------------------------------------------------------------------------------------
	User                               { name : 'User', flavor : 'local' }
	Some User                          { name : 'Some User', flavor : 'local' }
	JoeUser @ 1:103/75                 { name : 'JoeUser', flavor : 'ftn', remote : '1:103/75' }
	Bob@1:103/705@fidonet.org          { name : 'Bob', flavor : 'ftn', remote : '1:103/705@fidonet.org' }
	1:103/705@fidonet.org              { flavor : 'ftn', remote : '1:103/705@fidonet.org' }
	Jane <23:4/100>                    { name : 'Jane', flavor : 'ftn', remote : '23:4/100' }
	43:20/100.2                        { flavor : 'ftn', remote : '43:20/100.2' }
	foo@host.com                       { name : 'foo', flavor : 'email', remote : 'foo@host.com' }
	Bar <baz@foobar.net>               { name : 'Bar', flavor : 'email', remote : 'baz@foobar.com' }
*/
function getAddressedToInfo(input) {
	input = input.trim();

	const firstAtPos = input.indexOf('@');

	if(firstAtPos < 0) {
		let addr = Address.fromString(input);
		if(Address.isValidAddress(addr)) {
			return { flavor : Message.AddressFlavor.FTN, remote : input };
		}

		const lessThanPos = input.indexOf('<');
		if(lessThanPos < 0) {
			return { name : input, flavor : Message.AddressFlavor.Local };
		}

		const greaterThanPos = input.indexOf('>');
		if(greaterThanPos < lessThanPos) {
			return { name : input, flavor : Message.AddressFlavor.Local };
		}

		addr = Address.fromString(input.slice(lessThanPos + 1, greaterThanPos));
		if(Address.isValidAddress(addr)) {
			return { name : input.slice(0, lessThanPos).trim(), flavor : Message.AddressFlavor.FTN, remote : addr.toString() };
		}

		return { name : input, flavor : Message.AddressFlavor.Local };
	}

	const lessThanPos		= input.indexOf('<');
	const greaterThanPos	= input.indexOf('>');
	if(lessThanPos > 0 && greaterThanPos > lessThanPos) {
		const addr = input.slice(lessThanPos + 1, greaterThanPos);
		const m = addr.match(EMAIL_REGEX);
		if(m) {
			return { name : input.slice(0, lessThanPos).trim(), flavor : Message.AddressFlavor.Email, remote : addr };
		}

		return { name : input, flavor : Message.AddressFlavor.Local };
	}

	let m = input.match(EMAIL_REGEX);
	if(m) {
		return { name : input.slice(0, firstAtPos), flavor : Message.AddressFlavor.Email, remote : input };
	}

	let addr = Address.fromString(input);	//	5D?
	if(Address.isValidAddress(addr)) {
		return { flavor : Message.AddressFlavor.FTN, remote : addr.toString() } ;
	}

	addr = Address.fromString(input.slice(firstAtPos + 1).trim());
	if(Address.isValidAddress(addr)) {
		return { name : input.slice(0, firstAtPos).trim(), flavor : Message.AddressFlavor.FTN, remote : addr.toString() };
	}

	return { name : input, flavor : Message.AddressFlavor.Local };
}