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

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

        public bool IsStarted { get; private set; }
        public string Name { get; } = "Events Streaming";
        public bool RequiresTelemetryDuplicationTracking { get; } = true;

        public event EventHandler<TelemetryAvailableEventArgs> TelemetryAvailable;

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

        private void MachineEventsStateProvider_NewEvents(object sender, IEnumerable<MachinesEvent> events)
        {
            if (IsStarted)
            {
                foreach (var ev in events)
                {
                    TelemetryEvent t = EventMapper.MapEvent(ev);

                    TelemetryAvailable?.Invoke(this, new TelemetryAvailableEventArgs() { TelemetryObject = t });
                }
            }
        }

        public void Start()
        {
            if (!IsStarted)
            {
                IsStarted = true;
                _machineOperator.MachineEventsStateProvider.NewEvents += MachineEventsStateProvider_NewEvents;
            }
        }

        public void Stop()
        {
            if (IsStarted)
            {
                IsStarted = false;
                _machineOperator.MachineEventsStateProvider.NewEvents -= MachineEventsStateProvider_NewEvents;
            }
        }

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