using System;
using System.Threading;
using System.Threading.Tasks;
using Vinno.IUS.Common.Log;
using Vinno.vCloud.Common.FIS.Helper;
using Vinno.vCloud.FIS.CrossPlatform.Common;
using Vinno.vCloud.FIS.CrossPlatform.Common.Enum;
using WingInterfaceLibrary.DTO.ServerInfo;
using WingInterfaceLibrary.Interface;

namespace Vinno.vCloud.Common.FIS
{
    internal class ConnectionCheckerV2
    {
        private readonly IVinnoServerService _vinnoServerService;

        private readonly ManualResetEvent _waitEvent = new ManualResetEvent(false);

        /// <summary>
        ///get or set connection check cycle
        /// </summary>
        private readonly int _connectionCheckCycle;

        private bool _defaultStatus;

        private bool _checkLoginStatus;

        public event EventHandler Offlined;

        public ConnectionCheckerV2(IVinnoServerService vinnoServerService, int connectionCheckCycle)
        {
            _vinnoServerService = vinnoServerService;
            _connectionCheckCycle = connectionCheckCycle;
            _defaultStatus = false;
            _checkLoginStatus = false;
        }

        /// <summary>
        /// Start the Heartrate to keep the session available.
        /// </summary>
        public void Start(bool defaultStatus)
        {
            _defaultStatus = defaultStatus;
            _checkLoginStatus = defaultStatus;
            Task.Run(() =>
            {
                while (!_waitEvent.WaitOne(TimeSpan.FromSeconds(_connectionCheckCycle)))
                {
                    DoCheck();
                }
            });
        }

        /// <summary>
        /// Stop the Heartrate
        /// </summary>
        public void Stop()
        {
            _waitEvent.Set();
        }

        private void DoCheck()
        {
            try
            {
                if (_defaultStatus)
                {
                    if (!Check(true))
                    {
                        OnOfflined();
                    }
                }
                else
                {
                    OnOfflined();
                }
            }
            catch (Exception ex)
            {
                Logger.WriteLineError($"ConnectionCheckerV2 do check failed:{ex}");
            }
        }

        public bool Check(bool doubleCheck = true)
        {
            try
            {
                if (_checkLoginStatus)
                {
                    if (CommonParameter.Instance.DeviceStatus == EnumDeviceStatus.Offline || CommonParameter.Instance.DeviceStatus == EnumDeviceStatus.LoginFailed)//说明连接失败
                    {
                        return false;
                    }
                    else if (CommonParameter.Instance.DeviceStatus != EnumDeviceStatus.Logoning && CommonParameter.Instance.DeviceStatus != EnumDeviceStatus.Reconnecting && CommonParameter.Instance.DeviceStatus != EnumDeviceStatus.Online)//说明还在连接，未失败也未成功，下次仍需检查
                    {
                        _checkLoginStatus = false;
                    }
                }
                EchoResult result = JsonRpcHelper.Echo(_vinnoServerService);
                if (result == null || result.Code != 0)
                {
                    if (doubleCheck)
                    {
                        result = JsonRpcHelper.Echo(_vinnoServerService);
                        if (result == null || result.Code != 0)
                        {
                            return false;
                        }
                        else
                        {
                            return true;
                        }
                    }
                    else
                    {
                        return false;
                    }
                }
                else
                {
                    return true;
                }
            }
            catch (Exception ex)
            {
                Logger.WriteLineError($"ConnectionCheckerV2 check error:{ex}");
                return false;
            }
        }

        private void OnOfflined()
        {
            Offlined?.Invoke(this, EventArgs.Empty);
        }
    }
}