using System;
using System.IO;
using TeaBox.BuildVersion;

namespace TeaBox.Data
{
    /// <summary>
    /// The environment file contains the equivalent of the command line but in the package.
    /// This is useful for final packages that cannot receive command line arguments
    /// </summary>
    public static class EnvironmentFile
    {
        public static string Create(GameOnlineEnvironment environment)
        {
            string tmpFile;

            if (environment == GameOnlineEnvironment.Default)
            {
                return string.Empty;
            }
            else
            {
                tmpFile = Path.Combine(Environment.GetEnvironmentVariable("TEMP"), "cmdline.txt");
                using (var fileStream = new FileStream(tmpFile, FileMode.Create))
                using (var writer = new StreamWriter(fileStream))
                {
                    writer.WriteLine($"onlineServer={environment.Identifier()}");
                }
            }
            return tmpFile;
        }

        private static string Identifier(this GameOnlineEnvironment environment)
        {
            switch (environment)
            {
                case GameOnlineEnvironment.Default:
                    return "";
                case GameOnlineEnvironment.Qc:
                    return "qc";
                case GameOnlineEnvironment.Playtest:
                    return "playtest";
                case GameOnlineEnvironment.E3:
                    return "e3";
                default:
                    throw new NotImplementedException(environment.ToString());
            }
        }
    }
}