using System;
using System.IO;

namespace Hack.Xenosaga.Common
{
    public class Functions
    {
        public static void usage()
        {
            Console.WriteLine("xenosaga <option> <file> [regroup]");
            Console.WriteLine("  option   : -l = List files from index");
            Console.WriteLine("             -u = Unpack files from index");
            Console.WriteLine("             -p = Pack files from index");
            Console.WriteLine("  file    : Index file (the first one of each decade : xenosaga.00, xenosaga.10, xenosaga.20...)");
            Console.WriteLine("  regroup : true to regroup all files in only one (ex: 11, 12, 13 in 11) ; false or empty (default) to keep the same system of increment files");
        }

        public static bool checkArgs(string[] args, out Variables.stArgs listArgs)
        {
            listArgs = new Variables.stArgs();

            if (args.Length != 2 && args.Length != 3)
            {
                Console.WriteLine("Incorrect number of parameter!");
                return false;
            }

            if (args[0] != "-l" && args[0] != "-p" && args[0] != "-u")
            {
                Console.WriteLine("Incorrect parameter 1!");
                return false;
            }

            if (!File.Exists(args[1]))
            {
                Console.WriteLine("Incorrect parameter 2 : unknown file");
                return false;
            }

            if (args.Length == 3 && (args[2] != "true" && args[2] != "false"))
            {
                Console.WriteLine("Incorrect parameter 3!");
                return false;
            }

            listArgs.option = args[0];
            listArgs.filename = args[1];
            if (args.Length == 3)
                listArgs.regroup = args[2] == "true" ? true : false;

            return true;
        }

    }
}