using System;
using System.Diagnostics;
using System.IO;
using System.Threading.Tasks;
using PipeMethodCalls;

namespace NamedPipes;

public class NamedPipeClient (string pipeName,string?  serverLocation = null, string? serverName = null,Action<string>? logger = null): IDebugVisualizer, IDisposable
{
    private bool IsConnected => PipeClient.State == PipeState.Connected;
    private PipeClient<IDebugVisualizer> PipeClient { get; } = new(new PipeSerializer(), pipeName);
    private string ServerLocation { get; } = serverLocation ?? Environment.GetEnvironmentVariable("USERPROFILE") + @"\Documents\Visual Studio 2026\Visualizers\Server\NrxVisualizer\";
    private string ServerName { get; } = serverName ?? "Num.Roto.Nrx.VisualizerServer";
    private Action<string> Logger { get;} = logger ??((m) => Trace.WriteLine(m));
    
    private async Task StartServerAsync()
    {
        if (IsConnected) return;
        PipeClient.SetLogger((m) => Trace.WriteLine(m));
        var serverAvailable = Process.GetProcessesByName(ServerName).Length > 0;
        Logger($"Server available: {serverAvailable}");
        if (!serverAvailable)
        {
            var serverPath = ServerLocation + ServerName + ".exe";
            if (!File.Exists(serverPath)) throw new FileNotFoundException($"{nameof(StartServerAsync)}, Server does not exist, Path = {serverPath}");
            var server = new Process { StartInfo = { FileName = serverPath } };
            server.Start();
        }
        try
        {
            await PipeClient.ConnectAsync().ConfigureAwait(true);
            Logger("NamedPipeClient.StartServerAsync succeded.");
            return;
        }
        catch(Exception e)
        {
            Logger(e.ToString());
            throw;
        }
     }

    public async Task<bool> SetDebugObjectAsync(DebugObject debugObject)
    {
        await StartServerAsync().ConfigureAwait(true);
        var result = await PipeClient.InvokeAsync(server => server.SetDebugObjectAsync(debugObject));
        Logger("NamedPipeClient.SetDebugObjectAsync: result = " + result);
        return result;
    }

    public async Task<bool> SetMessageAsync(string message)
    {
        await StartServerAsync().ConfigureAwait(true);
        var result = await PipeClient.InvokeAsync(server => server.SetMessageAsync(message));
        Logger("NamedPipeClient.SetMessageAsync: result = " + result);
        return result;
    }

    public void Dispose()
    {
        GC.SuppressFinalize(this);
        PipeClient.Dispose();
     }
}