using System;
using System.Collections.Generic;
using log4net;

namespace TBF.UiBridge
{ 
    /// <summary>
    /// Provides separation of the UI and the state machine.
    /// </summary>
    static class Bridge
    {
		static readonly ILog log = LogManager.GetLogger(typeof(Bridge));

		static Queue<UI2BenchCmd> ui2machineQueue;
        public static Queue<UI2BenchCmd> Ui2MachineQueue { get { return ui2machineQueue; } }

		public static string SelectedProcedureName
		{
			get { return Program.MainWnd.ProcedureName; }
		}

		public static string SelectedTestName
		{
			get { return Program.MainWnd.BenchControlPanel.TestName; }
		}


        static Bridge()
        {
            ui2machineQueue = new Queue<UI2BenchCmd>();
        }

        /// <summary>
        /// This function should be called from the UI
        /// </summary>
        /// <param name="cmd"></param>
        public static void Ui2Bench(UI2BenchCmd cmd)
        {
            lock (Ui2MachineQueue)
            {
                ui2machineQueue.Enqueue(cmd);
            }
        }

        /// <summary>
        /// This function should be called from state machine operations
        /// </summary>
        public static void Bench2UI(ButtonsEtc flags)
        {
            if (ButtonsEtcHandler == null) return;
            try  {  ButtonsEtcHandler(null, new ButtonsEtcEventArgs(flags));  }
            catch (Exception e)  {  log.Error("UiEventHandler(...) failed", e);  }
        }
        public static event EventHandler<ButtonsEtcEventArgs> ButtonsEtcHandler;


		/// <summary>
		/// Called from the state machine when a procedure is selected and UI needs to be updated.
		/// </summary>
		public static void OnProcedureSelected(object sender, ProcedureSelectedEventArgs data)
		{
            if (ProcedureSelectedHandler == null) return;
			try { ProcedureSelectedHandler(sender, data); }
			catch (Exception e) { log.Error("ProcedureSelectedHandler(...) failed", e); }
		}
		public static event EventHandler<ProcedureSelectedEventArgs> ProcedureSelectedHandler;


		/// <summary>
		/// Called from the state machine when a test is selected and UI needs to be updated.
		/// </summary>
		public static void OnTestSelected(object sender, TestSelectedEventArgs data)
		{
            if (TestSelectedHandler == null) return;
			try { TestSelectedHandler(sender, data); }
			catch (Exception e) { log.Error("TestSelectedHandler(...) failed", e); }
		}
		public static event EventHandler<TestSelectedEventArgs> TestSelectedHandler;


		/// <summary>
		/// Called from the state machine when test process data change and UI needs to be updated.
		/// </summary>
		public static void OnTestProgress(object sender, TestProgressEventArgs data)
		{
            if (TestProgressHandler == null) return;
			try { TestProgressHandler(sender, data); }
            catch (Exception e) { log.Error("TestProgressHandler(...) failed", e); }
		}
		public static event EventHandler<TestProgressEventArgs> TestProgressHandler;


		/// <summary>
		/// Called from the state machine when the test is completed and UI needs to be updated.
		/// </summary>
		public static void OnTestCompleted(object sender, TestCompletedEventArgs data)
		{
            if (TestCompletedHandler == null) return;
			try { TestCompletedHandler(sender, data); }
			catch (Exception e) { log.Error("TestCompletedHandler(...) failed", e); }
		}
		public static event EventHandler<TestCompletedEventArgs> TestCompletedHandler;


		/// <summary>
		/// Called from the state machine when the procedure is completed and UI needs to be updated.
		/// </summary>
		public static void OnProcedureCompleted(object sender, ProcedureCompletedEventArgs data)
		{
            if (ProcedureCompletedHandler == null) return;
			try { ProcedureCompletedHandler(sender, data); }
			catch (Exception e) { log.Error("ProcedureCompletedHandler(...) failed", e); }
		}
		public static event EventHandler<ProcedureCompletedEventArgs> ProcedureCompletedHandler;


		/// <summary>
		/// Called from the state machine when the procedure is completed and UI needs to be updated.
		/// </summary>
        public static void OnCameraStateChanged(object sender, CameraStateChangedEventArgs data)
		{
            if (CameraStateChangedHandler == null) return;
            try { CameraStateChangedHandler(sender, data); }
			catch (Exception e) { log.Error("CameraStateChangedHandler(...) failed", e); }
		}
        public static event EventHandler<CameraStateChangedEventArgs> CameraStateChangedHandler;


        /// <summary>
        /// Called from the state machine when the procedure is completed and UI needs to be updated.
        /// </summary>
        public static void OnImageUpdated(object sender, ImageUpdatedEventArgs data)
        {
            if (ImageUpdatedHandler == null) return;
            try { ImageUpdatedHandler(sender, data); }
            catch (Exception e) { log.Error("ImageUpdatedHandler(...) failed", e); }
        }
        public static event EventHandler<ImageUpdatedEventArgs> ImageUpdatedHandler;


		/// <summary>
		/// Called from the state machine when there is and information to be logged.
		/// </summary>
        public static void OnLog(object sender, string message)
		{
            if (LogHandler == null) return;
            try { LogHandler(sender, new LogEventArgs(message)); }
			catch (Exception e) { log.Error("LogHandler(...) failed", e); }
		}
		public static event EventHandler<LogEventArgs> LogHandler;


        /// <summary>
        /// Called from the state machine when 'Activity' information changes.
        /// </summary>
        public static void OnActivity(object sender, string activity)
        {
            if (ActivityHandler == null) return;
            try { ActivityHandler(sender, new ActivityEventArgs(activity)); }
            catch (Exception e) { log.Error("ActivityHandler(...) failed", e); }
        }
        public static event EventHandler<ActivityEventArgs> ActivityHandler;


        /// <summary>
        /// 'State machine state has changed' event handler
        /// </summary>
        public static void OnStateChanged(object sender, string stateChangedMsg)
        {
            if (StateChangedHandler == null) return;
            try { StateChangedHandler(sender, new StateChangedEventArgs(stateChangedMsg)); }
            catch (Exception e) { string s = e.ToString(); }
        }
        public static event EventHandler<StateChangedEventArgs> StateChangedHandler;


        /// <summary>
        /// Called from the state machine when 'Activity' information changes.
        /// </summary>
        public static void OnEmergencyStopChanged(object sender, EmergencyStopEventArgs.State state)
        {
            if (EmergencyStopChangedHandler == null) return;
            try { EmergencyStopChangedHandler(sender, new EmergencyStopEventArgs(state)); }
            catch (Exception e) { log.Error("EmergencyStopHandler(...) failed", e); }
        }
        public static event EventHandler<EmergencyStopEventArgs> EmergencyStopChangedHandler;
    }
}