using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core;
using Tango.Core.DI;
using Tango.FSE.Common.Connection;
using Tango.FSE.Common.SystemInfo;
using Tango.PPC.Shared.Information;

namespace Tango.FSE.UI.SystemInfo
{
    /// <summary>
    /// Represents the <see cref="ISystemInfoProvider"/> default implementation.
    /// </summary>
    /// <seealso cref="Tango.Core.ExtendedObject" />
    /// <seealso cref="Tango.FSE.Common.SystemInfo.ISystemInfoProvider" />
    public class DefaultSystemInfoProvider : ExtendedObject, ISystemInfoProvider
    {
        private InformationPackage _package;

        private IMachineProvider MachineProvider { get; set; }

        private int _totalDyeMeters;
        /// <summary>
        /// Gets the machine total dye meters.
        /// </summary>
        public int TotalDyeMeters
        {
            get { return _totalDyeMeters; }
            set { _totalDyeMeters = value; RaisePropertyChangedAuto(); }
        }

        private TimeSpan _totalDyeTime;
        /// <summary>
        /// Gets the machine total dye time.
        /// </summary>
        public TimeSpan TotalDyeTime
        {
            get { return _totalDyeTime; }
            set { _totalDyeTime = value; RaisePropertyChangedAuto(); }
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="DefaultSystemInfoProvider"/> class.
        /// </summary>
        /// <param name="machineProvider">The machine provider.</param>
        public DefaultSystemInfoProvider(IMachineProvider machineProvider)
        {
            MachineProvider = machineProvider;
            MachineProvider.MachineConnected += MachineProvider_MachineConnected;
            MachineProvider.MachineDisconnected += MachineProvider_MachineDisconnected;
        }

        /// <summary>
        /// Gets the system information package from the remote machine.
        /// </summary>
        /// <returns></returns>
        public async Task<InformationPackage> GetSystemInformationPackage()
        {
            try
            {
                LogManager.Log("Retrieving remote machine PPC system information...");

                if (_package == null)
                {
                    var response = await MachineProvider.MachineOperator.SendGenericRequest<GetMachineInformationRequest, GetMachineInformationResponse>(new GetMachineInformationRequest(), new Transport.TransportRequestConfig()
                    {
                        Timeout = TimeSpan.FromSeconds(120)
                    });

                    _package = response.Package;
                    return _package;
                }
                else
                {
                    return _package;
                }
            }
            catch (Exception ex)
            {
                throw LogManager.Log(ex, "Error retrieving remote machine PPC system information.");
            }
        }

        private async void MachineProvider_MachineConnected(object sender, MachineConnectedEventArgs e)
        {
            if (MachineProvider.ConnectionType.IsRemote())
            {
                try
                {
                    TotalDyeMeters = 0;
                    TotalDyeTime = TimeSpan.Zero;

                    LogManager.Log("Retrieving remote machine counters...");

                    var response = await MachineProvider.MachineOperator.SendGenericRequest<GetMachineCountersRequest, GetMachineCountersResponse>(new GetMachineCountersRequest(), new Transport.TransportRequestConfig()
                    {
                        Timeout = TimeSpan.FromSeconds(10)
                    });

                    TotalDyeMeters = response.TotalDyeMeters;
                    TotalDyeTime = response.TotalDyeTime;
                }
                catch (Exception ex)
                {
                    throw LogManager.Log(ex, "Error retrieving remote machine counters.");
                }
            }
        }

        private void MachineProvider_MachineDisconnected(object sender, MachineDisconnectedEventArgs e)
        {
            _package = null;
            TotalDyeMeters = 0;
            TotalDyeTime = TimeSpan.Zero;
        }
    }
}