using System;
using System.Diagnostics;
using System.Net.Http;
using System.Text.Json;
using System.Threading;
using System.Threading.Tasks;
using Domain;
using Domain.Dto;
using MessagePack;

namespace Client;

public class HttpClientWrapper : IClient
{
    private readonly HttpClient _httpClient;
    private readonly string _baseUrl;
    private CancellationTokenSource _cts = new CancellationTokenSource();
    private Task? _runningTask;
    private Func<HttpResponseMessage, Task<Data?>>? _responseConverter;

    public HttpClientWrapper(Func<HttpResponseMessage, Task<Data?>> responseConverter, string baseUrl = "http://localhost:5555/")
    {
        _httpClient = new HttpClient();
        _baseUrl = baseUrl;
        _responseConverter = responseConverter;
    }


    public void Start()
    {
        _cts = new CancellationTokenSource();
        _runningTask = Task.Run(() => RunAsync(_cts.Token));
    }

    public void Stop()
    {
        _cts.Cancel();
        _runningTask?.Wait();
        _httpClient.Dispose();
    }

    private async Task RunAsync(CancellationToken token)
    {
        long index = 0;
        var sw = Stopwatch.StartNew();
        var lastMs = 0L;
        var lastIndex = 0L;
        var ms = 1000;
        while (!token.IsCancellationRequested)
        {
            try
            {
                var url = $"{_baseUrl}fetchpackage?index={index}";
                var response = await _httpClient.GetAsync(url, token);
                if (response.IsSuccessStatusCode)
                {
                    if (_responseConverter != null)
                    {
                        var data = await _responseConverter(response);
                        if (data != null)
                        {
                            var diff = sw.ElapsedMilliseconds - lastMs;
                            if (diff >= ms)
                            {
                                var fetched = index - lastIndex;
                                System.Console.WriteLine($"Fetched {fetched} data packages in {diff} ms.");
                                lastIndex = index;
                                lastMs = sw.ElapsedMilliseconds;
                            }
                            //System.Console.WriteLine(data);
                        }
                    }
                    else
                    {
                        Console.WriteLine("Response converter not set.");
                    }
                }
                else
                {
                    Console.WriteLine($"Failed to fetch data for index {index}: {response.StatusCode}");
                }
                index++;
                //await Task.Delay(100, token); // Wait 1 second between requests
            }
            catch (TaskCanceledException)
            {
                break;
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Error: {ex.Message}");
                await Task.Delay(1000, token);
            }
        }
    }
}