using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;

namespace SafeMobileLib
{
    public class TelemetryDecoder
    {
        private string radioID;
        private byte[] data;
        private DBtelemetryManager DBtel;
        private Boolean hytera;

        private bool[] di;
        public Boolean[] DI
        {
            get { return di; }
            set { di = value; }
        }

        public TelemetryDecoder(string radioID, byte[] data, DBtelemetryManager DBtel, Boolean hytera)
        {
            this.radioID = radioID;
            this.data = data;
            this.DBtel = DBtel;
            this.hytera = hytera;
            if (hytera)
                DecodeHytPacket(data);
            else
                DecodePacket(data);
        }
        public TelemetryDecoder()
        {
        }

        public void DecodePacket(Byte[] data)
        {
            SM.Debug("Decoding data for telemetry");
            try
            {
                
                //test opcode 0x10 = Announce Status; 0x0C =QueryStatusResponse
                if (data[2] == 0x10)
                {
                    //get DI that fired up the event
                    SM.Debug("Got telemetry opcode 0x10 =Announce Status");
                    di = ComputeDI(data[3]);
                    //get old value 
                    TelemetryPOS tPOS = DBtel.GetTelemetryPOS(radioID);
                    if (tPOS == null)
                    {
                        //this is first value
                        tPOS = new TelemetryPOS(0, radioID, 0, (int)data[3]);
                        DBtel.AddTelemetryPOS(tPOS);
                        SM.Debug("first telemetry message for " + radioID );
                    }
                    else
                    {
                        //update
                        tPOS.ByteValue = tPOS.ByteValue | (int)data[3];
                        SM.Debug("telemetry message for " + radioID );
                         
                        DBtel.UpdateTelemetryPOS(tPOS);
                    }
                }
                else
                {
                    SM.Debug("Got telemetry opcode 0x0C =QUerry response");
                    di = ComputeDI(data[3]);   //add by bigu
                    //get old value 
                    TelemetryPOS tPOS = DBtel.GetTelemetryPOS(radioID);
                    if (tPOS == null)
                    {
                        //this is first value
                        tPOS = new TelemetryPOS(0, radioID, 0, (int)data[3]);
                        DBtel.AddTelemetryPOS(tPOS);
                        SM.Debug("first telemetry message for " + radioID + " adding it to DB");
                    }
                    else
                    {
                        //update
                        int newByteValue = (int)data[3];
                        SM.Debug("telemetry message for " + radioID + " UPDATING");
                        tPOS.ByteValue = newByteValue;
                        DBtel.UpdateTelemetryPOS(tPOS);
                    }
                }                
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }


        public void DecodeHytPacket(Byte[] data)
        {
            SM.Debug("Decoding data for Hytera telemetry");
            try
            {

                //get DI that fired up the event
                SM.Debug("Got telemetry opcode 0xA081 = Status Report");
                di = ComputeDI(data[0]);

                //get old value 
                TelemetryPOS tPOS = DBtel.GetTelemetryPOS(radioID);
                if (tPOS == null)
                {
                    //this is first value
                    tPOS = new TelemetryPOS(0, radioID, 0, (Int16)data[0]);
                    DBtel.AddTelemetryPOS(tPOS);
                    SM.Debug("first telemetry message for " + radioID);
                }
                else
                {
                    //update
                    tPOS.ByteValue = (Int16)data[0];
                    SM.Debug("telemetry message for " + radioID);

                    DBtel.UpdateTelemetryPOS(tPOS);
                }

            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }

        uint DateTo70Format(DateTime param)
        {
            long nOfSeconds;
            System.DateTime dt70 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
            TimeSpan span = param - dt70;
            nOfSeconds = (long)span.TotalSeconds;
            return ((uint)nOfSeconds);
        }

        private bool[] ComputeDI(byte value)
        {
            bool[] diRet = new bool[] {false,false,false,false,false,false};
            for (int i = 0; i < 6; i++)
                if (((byte) Math.Pow(2, i) & value) == Math.Pow(2, i))
                    diRet[i] = true;

            return diRet;
        }
    }
}