using System.Threading;
using System.Threading.Tasks;
using CliWrap;
using DTLib.Extensions;
using Newtonsoft.Json;
using Млаумчерб.Клиент.классы;

namespace Млаумчерб.Клиент;

public interface IGame
{
    string Name { get; }
    IOPath InstallationDirectory { get; }
    Progress<NetworkTransferResult> BeginUpdate();
    void CancelUpdate();
    Task Launch();
    void Close();
}

public class MinecraftVersion : IGame
{
    public string Name { get; }
    public IOPath InstallationDirectory { get; }

    private IOPath JavaExecutableFilePath;

    private MinecraftVersionDescriptor descriptor;
    private JavaArguments javaArgs;
    private GameArguments gameArgs;
    private CancellationTokenSource? cts;
    private CommandTask<CommandResult>? commandTask;
    
    public MinecraftVersion(IOPath descriptorFilePath)
    {
        Name = descriptorFilePath.LastName().ToString().Replace(".json", "");
        InstallationDirectory =  Path.Concat(Приложение.Настройки.путь_к_кубачу, Name);
        string descriptorText = File.ReadAllText(descriptorFilePath);
        descriptor = JsonConvert.DeserializeObject<MinecraftVersionDescriptor>(descriptorText) 
            ?? throw new Exception($"can't parse descriptor file '{descriptorFilePath}'");
        javaArgs = new JavaArguments(descriptor);
        gameArgs = new GameArguments(descriptor);
        JavaExecutableFilePath = Path.Concat(Приложение.Настройки.путь_к_жабе, "bin",
            OperatingSystem.IsWindows() ? "javaw.exe" : "javaw");
    }
    
    public Progress<NetworkTransferResult> BeginUpdate()
    {
        throw new NotImplementedException();
    }

    public void CancelUpdate()
    {
        throw new NotImplementedException();
    }

    public async Task Launch()
    {
        var javaArgsList = javaArgs.FillPlaceholders([]);
        var gameArgsList = gameArgs.FillPlaceholders([]);
        var command = Cli.Wrap(JavaExecutableFilePath.ToString())
            .WithWorkingDirectory(InstallationDirectory.ToString())
            .WithArguments(javaArgsList)
            .WithArguments(gameArgsList);
        Приложение.Логгер.LogInfo(nameof(MinecraftVersion),
            $"launching the game" +
            "\njava: " + command.TargetFilePath +
            "\nworking_dir: " + command.WorkingDirPath +
            "\njava_arguments: \n\t" + javaArgsList.MergeToString("\n\t") +
            "\ngame_arguments: \n\t" + gameArgsList.MergeToString("\n\t"));
        cts = new();
        commandTask = command.ExecuteAsync(cts.Token);
        var result = await commandTask;
        Приложение.Логгер.LogInfo(nameof(MinecraftVersion), $"game exited with code {result.ExitCode}");
    }

    public void Close()
    {
        cts?.Cancel();
    }

    public override string ToString() => Name;
}