using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace xmlTools
{
    class Program
    {
        public const string XmlToolsVersion = "0.9"; // const variable are by default static
        private static appErrors lastError = appErrors.NO_ERROR;

        public enum appErrors
        {
            // 1-19 Errors with input parameters
            NO_ERROR = 0,
            ERROR_PARAMS = 1,
            FILE_NOT_FOUND = 2,
            ELEMENT_NOT_SPECIFIED = 3,
            ELEMENT_NOT_FOUND = 4,
            // 20-199 General application errors
            BACKUPS_ALREADY_EXISTS = 20,
            NUMBER_VALUES_TO_REPLACE_NE_AVAILABLE_VALUES = 21,
            INVALID_POSITIONS_RANGE = 22,
            // 200-299 Patch operations errors
            PATCH_ADDTO_PROCESS_ERROR = 200,
            PATCH_REMOVE_PROCESS_ERROR = 201,
            PATCH_COMMAND_PROCESS_ERROR = 202,
            PATCH_ELEMENT_NOT_FOUND = 203,
            PATCH_ADDTO_ERROR_PARSING_XML = 204,
            PATCH_COMMAND_NOT_FOUND = 205,
            PATCH_CODE_PROCESS_ERROR=206,
            PATCH_CODE_NOT_FOUND=207,
            PATCH_CODE_PARSE_XML_OUTPUT_ERROR=208,
        }

        public static void printAppError(appErrors error, string description, bool exitApp = false)
        {
            Console.Error.WriteLine("Error Code: " + (int)error);
            Console.Error.WriteLine(description);

            if (exitApp)
            {
                Environment.Exit(1);
            }
            lastError = error;
        }

        public static int Main(string[] args)
        {

            try
            {
                //We use a command parse library due to its advantages
                appErrors result = (appErrors)CLAP.Parser.RunConsole<ParametersParser>(args);
                if (result != appErrors.NO_ERROR)
                {
                    lastError = result;
                }
                return (int)lastError;
            }
            catch (Exception e)
            {
                printAppError(appErrors.ERROR_PARAMS, "Error processing parameters:\n" + e.ToString());
                return (int)appErrors.ERROR_PARAMS;
            }
        }
    }
}