using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.SignalR.Client;
using Microsoft.Extensions.DependencyInjection;

namespace squirrowse.client
{
    public class ConnectionManager : IConnectionManager
    {
        private readonly HubConnection _connection;
        public bool Connected;

        public ConnectionManager(string url, int port)
        {
            _connection = new HubConnectionBuilder()
                .WithUrl($"{url}:{port}/hub")
                .WithAutomaticReconnect()
                .AddMessagePackProtocol()
                .Build();
        }

        public async Task<HubConnection> GetConnection()
        {
            if (Connected) return _connection;

            throw new Exception();
        }

        public async Task InitConnection()
        {
            if (_connection.State == HubConnectionState.Connected) return;
            await _connection.StartAsync();
            Connected = true;
        }

        public async Task Disconnect()
        {
            if (_connection.State == HubConnectionState.Disconnected) throw new Exception();
            await _connection.StopAsync();
            Connected = false;
        }

        public bool IsConnected()
        {
            return Connected;
        }
    }

    public interface IConnectionManager
    {
        Task<HubConnection> GetConnection();
        Task InitConnection();
        Task Disconnect();

        bool IsConnected();
    }
}