using System;

namespace HidLibrary
{
    public class HidReport
    {
        private byte _reportId;
        private byte[] _data = new byte[] {};

        private readonly HidDeviceData.ReadStatus _status;

        public HidReport(int reportSize)
        {
            Array.Resize(ref _data, reportSize - 1);
        }

        public HidReport(int reportSize, HidDeviceData deviceData)
        {
            _status = deviceData.Status;

            Array.Resize(ref _data, reportSize - 1);

            if ((deviceData.Data != null))
            {

                if (deviceData.Data.Length > 0)
                {
                    _reportId = deviceData.Data[0];
                    Exists = true;

                    if (deviceData.Data.Length > 1)
                    {
                        var dataLength = reportSize - 1;
                        if (deviceData.Data.Length < reportSize - 1) dataLength = deviceData.Data.Length;
                        Array.Copy(deviceData.Data, 1, _data, 0, dataLength);
                    }
                }
                else Exists = false;
            }
            else Exists = false;
        }

        public bool Exists { get; private set; }
        public HidDeviceData.ReadStatus ReadStatus { get { return _status; } }

        public byte ReportId
        {
            get { return _reportId; }
            set
            {
                _reportId = value;
                Exists = true;
            }
        }

        public byte[] Data
        {
            get { return _data; }
            set
            {
                _data = value;
                Exists = true;
            }
        }

        public byte[] GetBytes()
        {
            byte[] data = null;
            Array.Resize(ref data, _data.Length + 1);
            data[0] = _reportId;
            Array.Copy(_data, 0, data, 1, _data.Length);
            return data;
        }
    }
}