using System.Net;
using DotNext;

namespace Peripherals.NetConfigClient;

static class NetConfigAddr
{
    const UInt32 BASE = 0x30A7_0000;

    public static readonly UInt32[] HOST_IP = { BASE + 0, BASE + 1, BASE + 2, BASE + 3 };
    public static readonly UInt32[] BOARD_IP = { BASE + 4, BASE + 5, BASE + 6, BASE + 7 };
    public static readonly UInt32[] HOST_MAC = { BASE + 8, BASE + 9, BASE + 10, BASE + 11, BASE + 12, BASE + 13 };
    public static readonly UInt32[] BOARD_MAC = { BASE + 14, BASE + 15, BASE + 16, BASE + 17, BASE + 18, BASE + 19 };
}


/// <summary>
/// [TODO:description]
/// </summary>
public class NetConfig
{
    private static readonly NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();

    readonly int timeout = 2000;
    readonly int taskID;
    readonly int port;
    readonly string address;
    private IPEndPoint ep;

    /// <summary>
    /// [TODO:description]
    /// </summary>
    /// <param name="address">[TODO:parameter]</param>
    /// <param name="port">[TODO:parameter]</param>
    /// <param name="taskID">[TODO:parameter]</param>
    /// <param name="timeout">[TODO:parameter]</param>
    /// <returns>[TODO:return]</returns>
    public NetConfig(string address, int port, int taskID, int timeout = 2000)
    {
        if (timeout < 0)
            throw new ArgumentException("Timeout couldn't be negative", nameof(timeout));
        this.address = address;
        this.taskID = taskID;
        this.port = port;
        this.ep = new IPEndPoint(IPAddress.Parse(address), port);
        this.timeout = timeout;
    }

    /// <summary>
    /// [TODO:description]
    /// </summary>
    /// <param name="ip">[TODO:parameter]</param>
    /// <returns>[TODO:return]</returns>
    public async ValueTask<Result<bool>> SetHostIP(IPAddress ip)
    {
        // 清除UDP服务器接收缓冲区
        MsgBus.UDPServer.ClearUDPData(this.address, this.taskID);

        var ipBytes = ip.GetAddressBytes();

        {
            var ret = await UDPClientPool.WriteAddrSeq(this.ep, this.taskID, NetConfigAddr.HOST_IP, ipBytes, this.timeout);
            if (!ret.IsSuccessful)
            {
                logger.Error($"Failed to set host IP: {ret.Error}");
                return new(ret.Error);
            }

            if (!ret.Value)
            {
                logger.Error($"Failed to set host IP: operation returned false");
                return false;
            }
        }

        return true;
    }

    /// <summary>
    /// [TODO:description]
    /// </summary>
    /// <param name="ip">[TODO:parameter]</param>
    /// <returns>[TODO:return]</returns>
    public async ValueTask<Result<bool>> SetBoardIP(IPAddress ip)
    {
        // 清除UDP服务器接收缓冲区
        MsgBus.UDPServer.ClearUDPData(this.address, this.taskID);

        var ipBytes = ip.GetAddressBytes();

        {
            var ret = await UDPClientPool.WriteAddrSeq(this.ep, this.taskID, NetConfigAddr.BOARD_IP, ipBytes, this.timeout);
            if (!ret.IsSuccessful)
            {
                logger.Error($"Failed to set board IP: {ret.Error}");
                return new(ret.Error);
            }

            if (!ret.Value)
            {
                logger.Error($"Failed to set board IP: operation returned false");
                return false;
            }
        }

        return true;
    }

    /// <summary>
    /// [TODO:description]
    /// </summary>
    /// <param name="macAddress">[TODO:parameter]</param>
    /// <returns>[TODO:return]</returns>
    public async ValueTask<Result<bool>> SetHostMAC(byte[] macAddress)
    {
        if (macAddress == null)
            throw new ArgumentNullException(nameof(macAddress));
        if (macAddress.Length != 6)
            throw new ArgumentException("MAC address must be 6 bytes", nameof(macAddress));

        // 清除UDP服务器接收缓冲区
        MsgBus.UDPServer.ClearUDPData(this.address, this.taskID);

        {
            var ret = await UDPClientPool.WriteAddrSeq(this.ep, this.taskID, NetConfigAddr.HOST_MAC, macAddress, this.timeout);
            if (!ret.IsSuccessful)
            {
                logger.Error($"Failed to set host MAC address: {ret.Error}");
                return new(ret.Error);
            }

            if (!ret.Value)
            {
                logger.Error($"Failed to set host MAC address: operation returned false");
                return false;
            }
        }

        return true;
    }

    /// <summary>
    /// [TODO:description]
    /// </summary>
    /// <param name="macAddress">[TODO:parameter]</param>
    /// <returns>[TODO:return]</returns>
    public async ValueTask<Result<bool>> SetBoardMAC(byte[] macAddress)
    {
        if (macAddress == null)
            throw new ArgumentNullException(nameof(macAddress));
        if (macAddress.Length != 6)
            throw new ArgumentException("MAC address must be 6 bytes", nameof(macAddress));

        // 清除UDP服务器接收缓冲区
        MsgBus.UDPServer.ClearUDPData(this.address, this.taskID);

        {
            var ret = await UDPClientPool.WriteAddrSeq(this.ep, this.taskID, NetConfigAddr.BOARD_MAC, macAddress, this.timeout);
            if (!ret.IsSuccessful)
            {
                logger.Error($"Failed to set board MAC address: {ret.Error}");
                return new(ret.Error);
            }

            if (!ret.Value)
            {
                logger.Error($"Failed to set board MAC address: operation returned false");
                return false;
            }
        }

        return true;
    }
}