using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace MainForm.ClassFile.XiaomiAPI
{
    /// <summary>
    /// 委托-回调方法类型
    /// </summary>
    /// <param name="id"></param>
    /// <param name="value"></param>
    /// <param name="dataId"></param>
    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
    public delegate void CallbackWithDataIdDelegate(string id, string value, string dataId);

    /// <summary>
    /// 小米 MqttClient类（Request&Response）
    ///   数据传输采⽤JSON报⽂，编码格式为 UTF-8，严格区分⼤⼩写
    ///   日期格式：2022-06-01 14:27:57.283
    ///   数据不能包含⾮法字符，如遇换⾏符、回⻋、单双引号、斜杠等需要进⾏转义或特殊处理
    ///   设计断⽹重连、数据重传机制
    /// </summary>
    public class XiaomiMqttClient
    {
        /// <summary>
        /// 设置日志文件保存路径
        /// </summary>
        /// <param name="logFileDir">日志文件保存路径</param>
        /// <returns></returns>
        [DllImport("DataTransferDll.dll", EntryPoint = "SetLogFileDir", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int SetLogFileDir(string logFileDir);

        #region 打开与关闭
        /// <summary>
        /// 1、打开（建立与MqttServer的连接）
        /// 注：在软件启动时，将MqttServer也随之启动
        /// </summary>
        /// <param name="addr">IP地址</param>
        /// <param name="port">端口</param>
        /// <returns></returns>
        [DllImport("DataTransferDll.dll", EntryPoint = "Open", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        private static extern int Open(string addr, int port);

        /// <summary>
        /// 1、打开（建立与MqttServer的连接）
        /// 注：在软件启动时，将MqttServer也随之启动
        /// </summary>
        /// <param name="addr">IP地址</param>
        /// <param name="port">端口</param>
        /// <returns></returns>
        public static int OpenMqttClient(string addr, int port)
        {
            int result = Open(addr, port);
            IsOpen = result == 0;
            return result;
        }

        /// <summary>
        /// 1、打开（建立与MqttServer的连接）
        /// With 调起 MqttServer
        /// 注：在软件启动时，将MqttServer也随之启动
        /// </summary>
        /// <param name="addr">IP地址</param>
        /// <param name="port">端口</param>
        /// <returns></returns>
        public static (int, string) OpenWithMqttServer(string addr, int port, string mqttServerPath, string mqttName)
        {
            // 检测MqttServer有没有开启，未开启时启动MqttServer
            if (!ProcessHelper.CheckProcessActivityByProcessName(mqttName))  // 进程名QIMITest.exe
            {
                string pathStr1 = mqttServerPath;
                if (FileIOHelper.ISExists_File(pathStr1))
                    ProcessHelper.StartProcess(pathStr1);
                else
                {
                    throw new Exception($"未找到{mqttServerPath}文件，请文件检查路径！");
                }
            }
            int result = -999;
            bool isOk = Task.Run(() => { result = Open(addr, port); }).Wait(10000);
            if (!isOk)  // 无响应
                return (-999, "上位机调用Iot的dll无响应[方法名Open]!");

            IsOpen = result == 0;
            return (result, result.ToString());
        }


        /// <summary>
        /// 2、设置回调方法- With DataId（可选，用于记录MqttServer的处理日志）
        /// </summary>
        /// <param name="callback"></param>
        [DllImport("DataTransferDll.dll", EntryPoint = "SetCallbackWithDataId", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void SetCallbackWithDataId(CallbackWithDataIdDelegate callback);


        /// <summary>
        /// 3、设置参数 -String
        /// 每次配置参数变更时(修改后点击保存)，都需要再次调⽤parameterConfig函数，将新的参数发送给MqttServer
        /// </summary>
        /// <param name="parameterJson">参数</param>
        /// <returns></returns>
        [DllImport("DataTransferDll.dll", EntryPoint = "ParameterConfig", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int ParameterConfig(string parameterJson);

        /// <summary>
        /// 3、设置参数 -结构
        /// 每次配置参数变更时(修改后点击保存)，都需要再次调⽤parameterConfig函数，将新的参数发送给MqttServer
        /// </summary>
        /// <param name="parameterJson">参数</param>
        /// <returns></returns>
        public static (int, string) ParameterConfig(XiaomiMqttLoginFunAndParam parameter)
        {
            string funAndParamJson = JsonConvert.SerializeObject(parameter);

            int result = -999;
            bool isOk = Task.Run(() => { result = ParameterConfig(funAndParamJson); }).Wait(10000);
            if (!isOk)  // 无响应
                return (-999, "上位机调用Iot的dll无响应[方法名ParameterConfig]!");

            return (result, result.ToString());
        }


        /// <summary>
        /// 5、关闭（关闭与MqttServer的连接）
        /// </summary>
        /// <returns></returns>
        [DllImport("DataTransferDll.dll", EntryPoint = "Close", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        private static extern int Close();

        /// <summary>
        /// 5、关闭（关闭与MqttServer的连接）
        /// </summary>
        /// <returns></returns>
        public static int CloseMqttClient()
        {
            int result = Close();

            IsOpen = false;
            return result;
        }

        /// <summary>
        /// 5、关闭（关闭与MqttServer的连接）
        /// With 关闭 MqttServer
        /// </summary>
        /// <param name="addr">IP地址</param>
        /// <param name="port">端口</param>
        /// <returns></returns>
        public static int CloseWithMqttServer(string mqttServerPath, string mqttName)
        {
            int result = Close();

            // 检测MqttServer有没有关闭，未开启时关闭MqttServer
            if (!ProcessHelper.CheckProcessActivityByProcessName(mqttName))  // 进程名QIMITest.exe
            {
                string pathStr1 = mqttServerPath;
                if (FileIOHelper.ISExists_File(pathStr1))
                    ProcessHelper.StartProcess(pathStr1);
                else
                {
                    throw new Exception($"未找到{mqttServerPath}文件，请文件检查路径！");
                }
            }
            IsOpen = false;
            return result;
        }
        #endregion 打开与关闭

        #region 属性
        private static bool _isOpen = false;
        /// <summary>
        /// 是否已打开
        /// </summary>
        public static bool IsOpen
        {
            get { return _isOpen; }
            set { _isOpen = value; }
        }
        #endregion 属性

        #region 4、发送数据
        /// <summary>
        /// 发送数据-英文
        /// </summary>
        /// <param name="id">事件标识；由固定前缀、分类层级(对应层级的英⽂名称)、事件ID/属性ID拼接⽽成</param>
        /// <param name="value">事件数据</param>
        /// <returns></returns>
        [DllImport("DataTransferDll.dll", EntryPoint = "Write", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int Write(string id, string msg);

        /// <summary>
        /// 发送数据-中文
        /// </summary>
        /// <param name="id">事件标识；由固定前缀、分类层级(对应层级的英⽂名称)、事件ID/属性ID拼接⽽成</param>
        /// <param name="value">事件数据</param>
        /// <returns></returns>
        // 配合使用ToUTF8，发送带中文的value
        [DllImport("DataTransferDll.dll", EntryPoint = "Write", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int Write(string id, byte[] msg);

        /// <summary>
        /// 发送数据-With DataId
        /// 英文
        /// </summary>
        /// <param name="id">事件标识；由固定前缀、分类层级(对应层级的英⽂名称)、事件ID/属性ID拼接⽽成</param>
        /// <param name="value">事件数据</param>
        /// <param name="dataId">自定义事件Id;如：guid</param>
        /// <returns></returns>
        [DllImport("DataTransferDll.dll", EntryPoint = "WriteWithDataId", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int WriteWithDataId(string id, string msg, string dataId);

        /// <summary>
        /// 发送数据-With DataId
        /// 中文
        /// </summary>
        /// <param name="id">事件标识；由固定前缀、分类层级(对应层级的英⽂名称)、事件ID/属性ID拼接⽽成</param>
        /// <param name="value">事件数据</param>
        /// <param name="dataId">自定义事件Id;如：guid</param>
        /// <returns></returns>
        // 配合使用ToUTF8，发送带中文的value
        [DllImport("DataTransferDll.dll", EntryPoint = "WriteWithDataId", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int WriteWithDataId(string id, byte[] msg, string dataId);

        /// <summary>
        /// 发送数据-With DeviceCode
        /// 英文
        /// </summary>
        /// <param name="id">事件标识；由固定前缀、分类层级(对应层级的英⽂名称)、事件ID/属性ID拼接⽽成</param>
        /// <param name="value">事件数据</param>
        /// <param name="deviceCode">设备编号;如：</param>
        /// <returns></returns>
        [DllImport("DataTransferDll.dll", EntryPoint = "WriteWithDeviceCode", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int WriteWithDeviceCode(string id, string msg, string deviceCode);

        /// <summary>
        /// 发送数据-With DeviceCode
        /// 中文
        /// </summary>
        /// <param name="id">事件标识；由固定前缀、分类层级(对应层级的英⽂名称)、事件ID/属性ID拼接⽽成</param>
        /// <param name="value">事件数据</param>
        /// <param name="deviceCode">设备编号;如：</param>
        /// <returns></returns>
        // 配合使用ToUTF8，发送带中文的value
        [DllImport("DataTransferDll.dll", EntryPoint = "WriteWithDeviceCode", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int WriteWithDeviceCode(string id, byte[] msg, string deviceCode);

        #endregion 4、发送数据

        #region 其他方法
        /// <summary>
        /// 转UTF-8
        /// </summary>
        /// <param name="text"></param>
        /// <returns></returns>
        public static byte[] ToUTF8(string text)
        {
            byte[] buffer1 = Encoding.Unicode.GetBytes(text);
            byte[] buffer2 = Encoding.Convert(Encoding.Unicode, Encoding.UTF8, buffer1, 0, buffer1.Length);
            return buffer2;
        }
        #endregion 其他方法

        #region 示例
        public void Demo()
        {
            string ip_addr = "127.0.0.1";
            int ip_port = 6666;
            // 1、连接MQTT工具
            Open(ip_addr, ip_port);
            // 2、设置回调函数
            SetCallbackWithDataId(CallbackWithDataId);
            // 3、参数配置
            string parameterJson = "{\r\n    \"function\":\"parameterConfig\",\r\n    \"redId\":\"123456\",\r\n    \"parameter\":{\r\n        \"mqtt\":{\r\n            \"address\":\"staging-cnbj2-rmq-mqtt.api.xiaomi.com\",\r\n            \"port\":\"80\",\r\n            \"username\":\"AKMO5BGFQUZL2SBW4X\",\r\n            \"password\":\"5AChJjCOYB+No68BpyDocd7uR7cv/foE20RKIpOE\"\r\n        },\r\n        \"equiment\":{\r\n            \"factoryCode\":\"\",\r\n            \"deviceCode\":\"DIGITION-TEST\",\r\n            \"stationCode\":\"\",\r\n            \"project\":\"\",\r\n            \"productMode\":\"debug\"\r\n        },\r\n        \"other\":{\r\n            \"logLevel\":\"0\",\r\n            \"runMode\":\"online\",\r\n            \"uploadDigitalTwinData\":\"true\"\r\n        }}}";
            ParameterConfig(parameterJson);
            Thread.Sleep(3000);
            for (int i = 0; i < 10; i++)
            {
                string msg = "{\"beat_tm\":\"2023-03-31 13:54:27.937\",\"signal_name\":\"中文\",\"signal_type\":\"DI\",\"target_status\":true}";
                // 4、写入ID、值
                int ret = Write("beat_log/control/device_control_signal/DT_motionbeat", ToUTF8(msg));
                Console.WriteLine("第{0}次,ret = {1}", i, ret);
                Thread.Sleep(50);
            }
            Console.WriteLine("请按任意键继续...");
            Console.ReadKey();
            // 5、关闭连接
            Close();
        }

        /// <summary>
        /// 回调方法示例- With DataId
        /// </summary>
        /// <param name="id"></param>
        /// <param name="v"></param>
        /// <param name="dataId"></param>
        public void CallbackWithDataId(string id, string v, string dataId)
        {
            Console.WriteLine("-------CallbackWithDataId-------");
            byte[] buffer1 = Encoding.Default.GetBytes(v);
            byte[] buffer2 = Encoding.Convert(Encoding.UTF8, Encoding.Default, buffer1, 0, buffer1.Length);
            string strBuffer = Encoding.Default.GetString(buffer2, 0, buffer2.Length);
            Console.WriteLine("{0} -> {1} {2}", id, strBuffer, dataId);
        }
        #endregion 示例
    }
}