using Edge.Core.Processor;using Edge.Core.IndustryStandardInterface.Pump;
using Edge.Core.Parser.BinaryParser.Util;
using ProGauge_StartItaliana_Probe.MessageEntity;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Edge.Core.Processor.Communicator;

namespace ProGauge_StartItaliana_Probe
{
    public class MessageCutter : IMessageCutter<byte[]>
    {
        private readonly List<byte> buffer = new List<byte>();
        //private List<char> validMessageFirstChars = new List<char>() { 'M', 'D', 'T', 'V', 'X', 'A' };
        public byte[] Message { get; private set; }

        public event EventHandler OnMessageCut;
        public event EventHandler<MessageCutterInvalidMessageReadEventArg> OnInvalidMessageRead;

        public void Feed(byte[] data)
        {
            for (int i = 0; i < data.Length; i++)
            {
                this.buffer.Add(data[i]);
                // first 5 chars are address, should range from 00000 to 00015
                if (this.buffer.Count >= 5
                    && (!int.TryParse(Encoding.ASCII.GetString(this.buffer.Take(5).ToArray()), out int parsedAddressValue)
                        || (parsedAddressValue < 0 || parsedAddressValue > 15))
                    )
                {
                    this.OnInvalidMessageRead?.Invoke(this,
                        new MessageCutterInvalidMessageReadEventArg()
                        {
                            Message = "MessageCutter, Unknown starter 5 bytes: 0x" + this.buffer.ToHexLogString() + ", will drop and clear buffer"
                        });
                    this.buffer.Clear();
                }

                if (this.buffer.Count >= 7
                    && this.buffer[this.buffer.Count - 2] == 0x0a
                    && this.buffer[this.buffer.Count - 1] == 0x0d)
                {
                    this.Message = this.buffer.ToArray();
                    var safe = this.OnMessageCut;
                    safe?.Invoke(this, null);
                    this.buffer.Clear();
                }

                if (this.buffer.Count >= 60)
                {
                    this.OnInvalidMessageRead?.Invoke(this,
                        new MessageCutterInvalidMessageReadEventArg()
                        {
                            Message = "Long length(len: " + this.buffer.Count +
                                ") message is still constructing in MsgCutter: 0x" + this.buffer.ToHexLogString() + ", will drop and clear buffer"
                        });
                    this.buffer.Clear();
                }
            }
        }
    }
}