// <auto-generated>
// This code is generated by csbindgen.
// DON'T CHANGE THIS DIRECTLY.
// </auto-generated>
#pragma warning disable CS8500
#pragma warning disable CS8981
using System;
using System.Runtime.InteropServices;


namespace ServicePoint
{

    public unsafe sealed partial class Connection: IDisposable
    {
#nullable enable
        public static Connection? Open(byte* host)
        {
            var native = Connection.sp_connection_open(host);
            return native == null ? null : new Connection(native);
        }

        public bool SendPacket(Packet packet)
        {
            return Connection.sp_connection_send_packet(Instance, packet.Instance);
        }

        public bool SendCommand(Command command)
        {
            return Connection.sp_connection_send_command(Instance, command.Instance);
        }


        private SPConnection* _instance;
        internal SPConnection* Instance
        {
            get
            {
                if (_instance == null)
                    throw new NullReferenceException("instance is null");
                return _instance;
            }
        }

        private Connection(SPConnection* instance)
        {
            ArgumentNullException.ThrowIfNull(instance);
            _instance = instance;
        }

        internal SPConnection* Into()
        {
            var instance = Instance;
            _instance = null;
            return instance;
        }

        private void Free()
        {
            if (_instance != null)
                Connection.sp_connection_free(Into());
        }

        public void Dispose()
        {
            Free();
            GC.SuppressFinalize(this);
        }

        ~Connection() => Free();
            
        const string __DllName = "servicepoint_binding_c";
#nullable restore
        /// <summary>
        ///  Creates a new instance of [SPConnection].
        ///
        ///  returns: NULL if connection fails, or connected instance
        ///
        ///  # Panics
        ///
        ///  - when `host` is null or an invalid host
        ///
        ///  # Safety
        ///
        ///  The caller has to make sure that:
        ///
        ///  - the returned instance is freed in some way, either by using a consuming function or
        ///    by explicitly calling `sp_connection_free`.
        /// </summary>
        [DllImport(__DllName, EntryPoint = "sp_connection_open", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        private static extern SPConnection* sp_connection_open(byte* host);

        /// <summary>
        ///  Sends a [SPPacket] to the display using the [SPConnection].
        ///
        ///  The passed `packet` gets consumed.
        ///
        ///  returns: true in case of success
        ///
        ///  # Panics
        ///
        ///  - when `connection` is NULL
        ///  - when `packet` is NULL
        ///
        ///  # Safety
        ///
        ///  The caller has to make sure that:
        ///
        ///  - `connection` points to a valid instance of [SPConnection]
        ///  - `packet` points to a valid instance of [SPPacket]
        ///  - `packet` is not used concurrently or after this call
        /// </summary>
        [DllImport(__DllName, EntryPoint = "sp_connection_send_packet", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [return: MarshalAs(UnmanagedType.U1)]
        private static extern bool sp_connection_send_packet(SPConnection* connection, SPPacket* packet);

        /// <summary>
        ///  Sends a [SPCommand] to the display using the [SPConnection].
        ///
        ///  The passed `command` gets consumed.
        ///
        ///  returns: true in case of success
        ///
        ///  # Panics
        ///
        ///  - when `connection` is NULL
        ///  - when `command` is NULL
        ///
        ///  # Safety
        ///
        ///  The caller has to make sure that:
        ///
        ///  - `connection` points to a valid instance of [SPConnection]
        ///  - `command` points to a valid instance of [SPPacket]
        ///  - `command` is not used concurrently or after this call
        /// </summary>
        [DllImport(__DllName, EntryPoint = "sp_connection_send_command", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        [return: MarshalAs(UnmanagedType.U1)]
        private static extern bool sp_connection_send_command(SPConnection* connection, SPCommand* command);

        /// <summary>
        ///  Closes and deallocates a [SPConnection].
        ///
        ///  # Panics
        ///
        ///  - when `connection` is NULL
        ///
        ///  # Safety
        ///
        ///  The caller has to make sure that:
        ///
        ///  - `connection` points to a valid [SPConnection]
        ///  - `connection` is not used concurrently or after this call
        /// </summary>
        [DllImport(__DllName, EntryPoint = "sp_connection_free", CallingConvention = CallingConvention.Cdecl, ExactSpelling = true)]
        private static extern void sp_connection_free(SPConnection* connection);


    }

    [StructLayout(LayoutKind.Sequential)]
    public unsafe partial struct SPConnection
    {
    }



}