using System;
using System.Diagnostics;
using System.Globalization;
using System.Net.Sockets;
using System.Text;

namespace BS.Shared
{
    public class Packet
    {
        // Fehlercodes zwischen 1500 und 1999
        public Socket         Socket             { get; set; }
        public string         ClientName         { get; set; }
        public long           SenderPersonOid    { get; set; }
        public long           RecipientPersonOid { get; set; }
        public DataIdentifier DataIdentifier     { get; set; }
        public string         ChatMessage        { get; set; }
        public DateTime       MessageTimeStamp   { get; set; }
        public string         Tenant             { get; set; }
        public bool           IsDelivered        { get; set; }
        public long           ServerseitigeOid   { get; set; }
        public long           ClientseitigeOid   { get; set; }

        public byte[] DataBuffer = new byte[1024];

        //Aufbau Message:
        // die ersten fünf ";" ignorieren
        // SenderOid;RecipientOid;ClientNameLength;MessageLength;ChatDataIdentifier;Tenant;[ClientName][ChatMessage][MessageTimeStamp]

        //23;281;20;389;1;39;[Tenant]; 7 Semikola

        public Packet(Socket pSocket, string pClientName, long pSenderPersonOid, long pRecipientPersonOid)
        {
            Socket             = pSocket;
            ClientName         = pClientName;
            SenderPersonOid    = pSenderPersonOid;
            RecipientPersonOid = pRecipientPersonOid;
            MessageTimeStamp   = DateTime.Now;
            ChatMessage        = "";
            Tenant             = "";
        }

        public Packet()
        {
            MessageTimeStamp = DateTime.Now;
            ChatMessage      = "";
            Tenant           = "";
            ClientName       = "";
        }

        public void GetData(string message)
        {
            Debug.WriteLine("Erhaltene Nachricht: " + message);

            try
            {
                var gesplittet = message.Split(';');

                var senderPersonOidString    = gesplittet[0];
                var recipientPersonOidString = gesplittet[1];
                var chatNameLengthString     = gesplittet[2];
                var chatMessageLengthString  = gesplittet[3];
                var chatIdentifierString     = gesplittet[4];
                var serverseitigeOidString   = gesplittet[5];
                var clientseitigeOidString   = gesplittet[6];
                Tenant                       = gesplittet[7];

                DataIdentifier = (DataIdentifier) Convert.ToInt32(chatIdentifierString);

                SenderPersonOid    = Convert.ToInt64(senderPersonOidString);
                RecipientPersonOid = Convert.ToInt64(recipientPersonOidString);
                ServerseitigeOid   = Convert.ToInt64(serverseitigeOidString);
                ClientseitigeOid   = Convert.ToInt64(clientseitigeOidString);

                var chatNameLength    = Convert.ToInt32(chatNameLengthString);
                var chatMessageLength = Convert.ToInt32(chatMessageLengthString);

                var headerLength  = senderPersonOidString.Length + recipientPersonOidString.Length + chatNameLengthString.Length + chatMessageLengthString.Length + chatIdentifierString.Length + Tenant.Length + serverseitigeOidString.Length + clientseitigeOidString.Length + 9;
                var actualMessage = message.Substring(headerLength - 1);

                ClientName  = actualMessage.Substring(0, chatNameLength);
                ChatMessage = actualMessage.Substring(chatNameLength, chatMessageLength);

                var dateString = actualMessage.Substring(chatMessageLength + chatNameLength, 19);

                MessageTimeStamp = DateTime.ParseExact(dateString, "dd.MM.yyyy HH:mm:ss", CultureInfo.InvariantCulture);

                IsDelivered = Convert.ToBoolean(Convert.ToInt32(actualMessage.Substring(chatMessageLength + chatNameLength + 19, 1)));
            }
            catch(Exception exception)
            {
                Debug.WriteLine("Error 1500: " + exception.Message);
            }
        }

        public byte[] GetDataStream()
        {
            var result = "";

            result += SenderPersonOid + ";" + RecipientPersonOid + ";" + ClientName.Length + ";" + ChatMessage.Length + ";" + (int) DataIdentifier + ";" + ServerseitigeOid + ";" + ClientseitigeOid + ";" + Tenant + ";" + ClientName + ChatMessage + DateTime.Now.ToString("dd.MM.yyyy HH:mm:ss") + "" + (IsDelivered ? 1 : 0);

            Debug.WriteLine("Verschicke Paket: " + result);

            return Encoding.UTF8.GetBytes(result);
        }


        public byte[] GetDataStream(long senderPersonOid, long empfaengerPersonoid, string clientName, string message, DataIdentifier dataIdentifier, string tenant, bool isDelivered)
        {
            //Bewo Klient Speziallisiert
            var result = "";

            result += senderPersonOid + ";" + empfaengerPersonoid + ";" + clientName.Length + ";" + message.Length + ";" + (int)dataIdentifier + ";" + 0 + ";" + 0 + ";" + tenant + ";" + clientName + message + DateTime.Now.ToString("dd.MM.yyyy HH:mm:ss") + "" + (isDelivered ? 1 : 0); 

            return Encoding.UTF8.GetBytes(result);
        }
    }
}