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

namespace SN_Server
{
    public class ServerMSG
    {
        private int len;
        public int Len
        {
            get { return len; }
            set { len = value; }
        }

        private int opcode;
        public int OPcode
        {
            get { return opcode; }
            set { opcode = value; }
        }

        private string sn; //serial number
        public string SN
        {
            get { return sn; }
            set { sn = value; }
        }

        private string payload;
        public string Payload
        {
            get { return payload; }
            set { payload = value; }
        }

        private string oldMSG;

        public bool valid;

        public ServerMSG()
        {
        }
        public ServerMSG(string msg, int len)
        {
            oldMSG = msg;
            //decode
            valid = Decode(msg, len);
        }

        private bool Decode(string data, int actualLen)
        {
            bool ret = false ;
            string[] tempArr = data.Split('#');
            if ((tempArr.Length == 0) || (tempArr.Length == 1))
            {
                Console.WriteLine("incorect message=" + data);
                return ret;
            }

            //get len
            len = Convert.ToInt32(tempArr[1]);

            if (actualLen != len)
            {
                Console.WriteLine("message length({0}) != actual length({1})", len, actualLen);
                return ret;
            }

            //get opcode
            opcode = Convert.ToInt32(tempArr[2],16);

            //get serial number
            sn = tempArr[3];

            //get payload
            payload = tempArr[4];

            return ret;
        }

        public static string GenMsg(int opcode, string serialNr, string paylaod)
        {
            string temp = "#" + opcode.ToString("X4") + "#" + serialNr + "#" + paylaod + "#";
            int strlen = ("#" + (temp.Length).ToString() + temp).Length;
            temp = "#" + strlen.ToString() + temp;
            return temp;
        }


        public static ArrayList Split(string data, int actualLen)
        {
            ArrayList ar = new ArrayList();

            string[] tempArr = data.Split('#');
            if ((tempArr.Length == 0) || (tempArr.Length == 1))
            {
                Console.WriteLine("incorect message=" + data);
                return null ;
            }

            //get len
            int len = Convert.ToInt32(tempArr[1]);

            if (actualLen != len)
            {
                Console.WriteLine("message length({0}) != actual length({1})", len, actualLen);
                Console.WriteLine(data);

                if (len < actualLen)
                {
                    string first = data.Substring(0, len);
                    ar.Add(first);

                    string leftOver = data.Substring(len, actualLen - len);

                    ArrayList ar_new = Split(leftOver, leftOver.Length);
                    if (ar_new != null)
                    {
                        foreach (string str in ar_new)
                            ar.Add(str);
                    }
                }
            }
            else
            {
                ar.Add(data);
            }


            return ar;
        }
    }
}