using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Integration.Operation;
using Tango.Telemetry.Telemetries;

namespace Tango.Telemetry.Sources
{
    public class TelemetryMachineStatusStreamingSource : ITelemetryStreamingSource
    {
        private IMachineOperator _machineOperator;

        public bool IsStarted { get; private set; }
        public string Name { get; } = "Machine Status Streaming";
        public bool RequiresTelemetryDuplicationTracking { get; }

        public event EventHandler<TelemetryAvailableEventArgs> TelemetryAvailable;

        public TelemetryMachineStatusStreamingSource(IMachineOperator machineOperator)
        {
            _machineOperator = machineOperator;
        }

        public void Start()
        {
            if (!IsStarted)
            {
                IsStarted = true;
                _machineOperator.MachineStatusChanged += MachineOperator_MachineStatusChanged;
            }
        }

        public void Stop()
        {
            if (IsStarted)
            {
                IsStarted = false;
                _machineOperator.MachineStatusChanged -= MachineOperator_MachineStatusChanged;
            }
        }

        private void MachineOperator_MachineStatusChanged(object sender, PMR.MachineStatus.MachineStatus status)
        {
            if (IsStarted)
            {
                TelemetryAvailable?.Invoke(this, new TelemetryAvailableEventArgs()
                {
                    TelemetryObject = new TelemetryMachineStatus()
                    {
                        Status = status
                    }
                });
            }
        }

        public void Dispose()
        {
            Stop();
        }
    }
}