///
/// Copyright (c) 2013-2015 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO.Ports;
using System.Text;
using log4net;
using Config.Entities;
using TBF.BenchControl.Generic;
using TBF.Boxes;

namespace TBF.BenchControl.Ambient.Comet
{
    /// <summary>
    /// Ambient temperature / humidity / pressure meter 'Greco' connected via serial interface (RS232)
	/// Connection settings: 9600 Bd 8-bits No-parity 2-stop-bits Flow control: none.
	/// </summary>
	public class Ambient : ComponentBase, IDevice, IOperation, GenericDevices.IAmbient
    {
		private static readonly ILog log = LogManager.GetLogger(typeof(Ambient));
		public override string ToString() { return string.Format("Ambient({0})", Cfg.ToString(1)); }

		private readonly AmbientCfg ambientCfg;

		/// Private fields
		SerialPort serialPort;

		/// <summary>The state of the measurement</summary>
		MsrmntState msrmntState;

		/// <summary>Measured temperature when MsrmntState == MsrmntState.Valid</summary>
		float temperature;

		/// <summary>Measured humidity when MsrmntState == MsrmntState.Valid</summary>
		float humidity;

		/// <summary>Measured pressure when MsrmntState == MsrmntState.Valid</summary>
		float pressure;

		/// <summary>Measurement time stamp when MsrmntState == MsrmntState.Valid</summary>
		int msrmntTimeStamp;

		public Ambient()
		{
		}

		/// <summary>
		/// Ambient temperature / humidity / pressure meter 'Greco' connected via serial interface (RS232)
		/// Connection settings: 19200 Bd 8-bits No-parity 1-stop-bit Flow control: none or hardware.
		/// </summary>
		public Ambient(AmbientCfg cfg, IList<Generic.IComponent> components)
            : base(cfg)
        {
			ambientCfg = cfg;
			log.Debug(this.ToString());
		}

		public void Initialize()
		{
			if (ambientCfg.DebugLevel == DebugMode.Simulate)
			{
				temperature = 20.0f;
				humidity = 40.0f;
				pressure = 1.0f;
				msrmntTimeStamp = StateMachine.Time;
				msrmntState = MsrmntState.Valid;
				return;
			}

			string comPortName = "COM" + ambientCfg.ComPortNr.ToString();
			serialPort = new SerialPort(comPortName, ambientCfg.BaudRate, ambientCfg.Parity, ambientCfg.DataBits, ambientCfg.StopBits);
			serialPort.Handshake = ambientCfg.Handshake;
			serialPort.Open();
			msrmntState = MsrmntState.Busy;

            log.FatalFormat("Successfully initialized device {0}", ToString());
        }

        /// <summary>Run this device</summary>
        public void RunDeviceBefore()
        {
			if (ambientCfg.DebugLevel == DebugMode.Simulate ||
				ambientCfg.DebugLevel == DebugMode.FailureDuringOperation)
			{
				msrmntTimeStamp = StateMachine.Time;
				return;
			}

			try
			{
				int receivedBytes = serialPort.BytesToRead;

				if (receivedBytes >= 13)
				{
					byte[] byteArr = new byte[receivedBytes];
					for (int i = 0; i < receivedBytes; i++) byteArr[i] = (byte)serialPort.ReadByte();
					log.Debug(Telegram.LogTelegram("Received ", byteArr));

					if ((receivedBytes == 13) && (byteArr[0] == 1) && (byteArr[1] == 3) && (byteArr[2] == 8) && Telegram.VerifyTelegramCRC(byteArr))
					{
						int value = (int)byteArr[3] * 256 + (int)byteArr[4];
						temperature = (float)value / 10.0f;

						value = (int)byteArr[5] * 256 + (int)byteArr[6];
						humidity = (float)value / 10.0f;

						value = (int)byteArr[9] * 256 + (int)byteArr[10];
						pressure = (float)value / 10.0f;

						msrmntTimeStamp = StateMachine.Time;
						msrmntState = MsrmntState.Valid;
						log.InfoFormat("Ambient: temperature = {0} C, humidity = {1} %, pressure = {2} hPa", temperature.ToString("F1"), humidity.ToString("F1"), pressure.ToString("F0"));
					}
				}
			}
			catch (Exception e)
			{
				DebugLevel = DebugMode.FailureDuringOperation;
				serialPort = null;

				log.FatalFormat("Ambient: Serail port read failure : {0}", e.Message);
				if (e.InnerException != null)
				{
					log.FatalFormat("InnerMessage : {0}", e.InnerException.Message);
				}
			}
		}

        /// <summary>Run this device</summary>
        public void RunDeviceAfter()
        {
			if (ambientCfg.DebugLevel == DebugMode.Simulate ||
				ambientCfg.DebugLevel == DebugMode.FailureDuringOperation)
			{
				return;
			}

			try
			{
				/// Each 10 seconds
				if ((StateMachine.Time % 10) == 0)
				{
					/// Read four registers: 0x31, 0x32, 0x33, 0x34
					UInt16 regAddr = 0x0030;    /// register addr. = 0x31 (Modbus!)
					UInt16 count = 4;

					/// Prepare data to be sent
					byte[] msg = new byte[8];
					msg[0] = 1;							/// (byte)ambientCfg.BusAddress;
					msg[1] = 3;							/// CMD = Read registers
					msg[2] = (byte)(regAddr >> 8);		/// Control Word Hi
					msg[3] = (byte)(regAddr & 0xFF);	/// Control Word Lo
					msg[4] = (byte)(count >> 8);		/// Serial Com Reference Hi
					msg[5] = (byte)(count & 0xFF);		/// Serial Com Reference Lo
					Telegram.UpdateTelegramCRC(msg);

					log.Debug(Telegram.LogTelegram("Sending ", msg));
					serialPort.Write(msg, 0, msg.Length);
				}
			}
			catch (Exception e)
			{
				DebugLevel = DebugMode.FailureDuringOperation;
				serialPort = null;

				log.FatalFormat("Ambient: Serail port read failure : {0}", e.Message);
				if (e.InnerException != null)
				{
					log.FatalFormat("InnerMessage : {0}", e.InnerException.Message);
				}
			}
		}

        /// <summary>Stop this device</summary>
        public void StopDevice()
        {
            if (serialPort != null) serialPort.Close();
        }

		///
		/// Boxes for the operation result
		///
		FloatBox tempBox;
		FloatBox pressureBox;
		FloatBox humiBox;

		public IOperation ReadAmbientOp(FloatBox temperature, FloatBox pressure, FloatBox humidity)
		{
			this.tempBox     = temperature;
			this.pressureBox = pressure;
			this.humiBox     = humidity;
			return this;
		}

		/// <summary>Start this operation</summary>
		public void Start()
		{
            if (tempBox     != null) tempBox.Val     = temperature;
            if (pressureBox != null) pressureBox.Val = pressure;
            if (humiBox     != null) humiBox.Val     = humidity;
        }

		/// <summary>Run this operation</summary>
		/// <returns>
		///		Event.FlowInDone or Event.FlowOutDone
		/// </returns>
		public Event Run()
		{
            if (tempBox     != null) tempBox.Val     = temperature;
            if (pressureBox != null) pressureBox.Val = pressure;
            if (humiBox     != null) humiBox.Val     = humidity;
            return Event.AmbientDone;
		}

		/// <summary>Stop this operation</summary>
		public void Stop()
		{
		}
	}
}