using System;
using RGB.NET.Core;

namespace RGB.NET.Devices.DMX.E131
{
    /// <inheritdoc />
    /// <summary>
    /// Represents device information for a <see cref="E131Device"/> />.
    /// </summary>
    public class E131DeviceInfo : IRGBDeviceInfo
    {
        #region Constants

        /// <summary>
        /// The length of the CID;
        /// </summary>
        // ReSharper disable once MemberCanBePrivate.Global
        public const int CID_LENGTH = 16;

        #endregion

        #region Properties & Fields

        /// <inheritdoc />
        public RGBDeviceType DeviceType { get; }

        /// <inheritdoc />
        public string DeviceName { get; }

        /// <inheritdoc />
        public string Manufacturer { get; }

        /// <inheritdoc />
        public string Model { get; }

        /// <inheritdoc />
        public object? LayoutMetadata { get; set; }

        /// <summary>
        /// The hostname of the device.
        /// </summary>
        public string Hostname { get; }

        /// <summary>
        /// The port of the device. 
        /// </summary>
        public int Port { get; }

        /// <summary>
        /// The CID used to identify against the device.
        /// </summary>
        public byte[] CID { get; }

        /// <summary>
        /// The Universe this device belongs to.
        /// </summary>
        public short Universe { get; }

        #endregion

        #region Constructors

        internal E131DeviceInfo(E131DMXDeviceDefinition deviceDefinition)
        {
            this.DeviceType = deviceDefinition.DeviceType;
            this.Manufacturer = deviceDefinition.Manufacturer;
            this.Model = deviceDefinition.Model;
            this.Hostname = deviceDefinition.Hostname;
            this.Port = deviceDefinition.Port;
            this.Universe = deviceDefinition.Universe;
            
            byte[]? cid = deviceDefinition.CID;
            if ((cid == null) || (cid.Length != CID_LENGTH))
            {
                cid = new byte[CID_LENGTH];
                new Random().NextBytes(cid);
            }

            CID = cid!;

            DeviceName = DeviceHelper.CreateDeviceName(Manufacturer, Model);
        }

        #endregion
    }
}