using System;

namespace DTS.DASLib.Service.StateMachine
{
    public class HardwareDiscoveryStart : DASStateSelector
    {
        private void Start()
        {
            OnEnterState();
            if (null != Status.HardwareDiscoveryParams.RequeryDevice)
            {
                Status.HardwareDiscoveryStatusInfo.RequeryDevice();
            }
            else { Status.HardwareDiscoveryStatusInfo.Ping(); }
        }

        private bool CanTransitToDownload()
        {
            return CanTransitToConfigure() && Status.HardwareDiscoveryParams.GoToDownload;
        }

        private bool CanTransitToConfigure()
        {
            return Status.HardwareDiscoveryParams.ProceedWhenDone && (Status.HardwareDiscoveryStatusInfo.AllDASFound || !Status.HardwareDiscoveryParams.RequireAllDASFound);
        }
        private bool CanTransitToArm()
        {
            return Status.HardwareDiscoveryParams.ProceedWhenDone && Status.HardwareDiscoveryStatusInfo.SomeUnitsInArmState;
        }

        public override IDASState StateSelector()
        {
            if (CanTransitToDownload())
                return States.Instance.Download;

            if (CanTransitToConfigure())
                return States.Instance.Configure;

            if (CanTransitToArm())
                return States.Instance.Arm;

            return States.Instance.HardwareDiscovery;
        }
        public override Action OnEntry
        {
            get => Start;
        }

        public override State State => State.HardwareDiscoveryStart;
    }
}