using System.Net.Sockets;
using System.Net;
using Ayay.SerilogLogs;
using Grpc.Net.Client;
using Serilog;
using SHH.CameraSdk;
using SHH.Contracts.Grpc;

namespace SHH.CameraService;

public static class Bootstrapper
{
    #region ParseConfigAndInitLogger

    /// <summary>
    /// 解析参数并初始化 Serilog
    /// </summary>
    public static (ServiceConfig Config, LogOptions opts, bool IsDebug) ParseConfigAndInitLogger(string[] args)
    {
        bool isDebugArgs = args.Length == 0;

        // =================================================================================
        // 1. 模拟调试参数
        // 原理：直接构造 string[]，完全模拟 OS 传递给 Main 的参数结构，避免 Split 带来的空格解析风险
        // =================================================================================
        if (isDebugArgs)
        {
            args = new[]
            {
                "--appid",   "CameraApp_01",
                
                // 视频流地址 (格式: IP,Port,Type,Desc)
                "--uris",    "localhost,9001,video,调试PC;",
                "--uris",    "localhost,9002,video,调试PC-2;",
                
                // 指令通道
                "--uris",    "localhost,9001,command,调试PC;",
                
                // 日志中心配置 (格式: IP,Port,Desc)
                "--sequris", "172.16.41.241,20026,日志处置中心;",
                "--seqkey",  "Shine899195994250;",
                
                // 端口策略
                "--mode",    "1",
                "--ports",   "5000,100"
            };
        }

        var config = ServiceConfig.BuildFromArgs(args);

        var ops = new LogOptions
        {
            AppId = config.AppId,
            LogRootPath = $@"D:\Logs\{config.AppId}",

            // ★这里改为从 config 读取，如果没配则留空或给个默认值
            SeqServerUrl = config.SeqServerUrl,
            SeqApiKey = config.SeqApiKey,

            MaxRetentionDays = 10,
            FileSizeLimitBytes = 1024L * 1024 * 1024,

            // 动态设置日志级别
            ModuleLevels = new Dictionary<string, Serilog.Events.LogEventLevel>
            {
                // 确保 Core 模块在调试时能输出 Debug，在生产时输出 Info
                { LogModules.Core, isDebugArgs ? Serilog.Events.LogEventLevel.Debug : Serilog.Events.LogEventLevel.Information },
                { LogModules.Network, Serilog.Events.LogEventLevel.Warning }
            }
        };
        LogBootstrapper.Init(ops);

        return (config, ops, isDebugArgs);
    }

    #endregion

    #region Shutdown

    /// <summary>
    /// 统一的资源释放与关闭方法
    /// </summary>
    /// <summary>
    /// 统一的资源释放与关闭方法
    /// </summary>
    /// <param name="reason">退出原因</param>
    /// <param name="exitCode">退出码 (0=正常, 非0=异常)</param>
    public static void Shutdown(string reason, int exitCode = 0)
    {
        // 创建一个临时的上下文 Logger，防止全局 Logger 已被部分释放
        var sysLog = Log.ForContext("SourceContext", LogModules.Core);

        try
        {
            // =========================================================
            // 1. 写日志
            // =========================================================
            if (exitCode != 0)
            {
                sysLog.Fatal($"💀 [程序终止] {reason} (Code: {exitCode})");
            }
            else
            {
                sysLog.Information($"👋 [程序退出] {reason}");
            }

            // =========================================================
            // 2. 核心硬件资源释放 (关键！)
            // =========================================================
            // 防止 SDK 句柄残留导致下次启动无法连接相机
            try
            {
                sysLog.Information("正在清理 Hikvision SDK 资源...");

                // 如果你的项目中引用了 SDK，请务必解开这行注释
                HikNativeMethods.NET_DVR_Cleanup();
            }
            catch (Exception ex)
            {
                sysLog.Error(ex, "⚠️ SDK 资源清理失败");
            }

            // =========================================================
            // 3. 日志强制落盘
            // =========================================================
            // Environment.Exit 是暴力退出，finally 块不会执行，
            // 必须手动 Flush 确保最后一条日志写入磁盘。
            Log.CloseAndFlush();
        }
        catch
        {
            // 忽略所有清理过程中的错误，确保一定要执行到 Environment.Exit
        }

        // =========================================================
        // 4. 开发环境交互 (生产环境自动跳过)
        // =========================================================
        // 只有在调试器挂载时才暂停，防止 Docker/Service 环境卡死
        if (System.Diagnostics.Debugger.IsAttached)
        {
            Console.ForegroundColor = exitCode == 0 ? ConsoleColor.Green : ConsoleColor.Red;
            Console.WriteLine($"\n[Debug模式] 按下任意键退出... (ExitCode: {exitCode})");
            Console.ResetColor();
            Console.ReadKey();
        }

        // =========================================================
        // 5. 暴力且彻底地结束进程
        // =========================================================
        Environment.Exit(exitCode);
    }

    #endregion

    #region ScanForAvailablePort

    /// <summary>
    /// 扫描可用端口
    /// </summary>
    public static int ScanForAvailablePort(ServiceConfig config, ILogger logger)
    {
        logger.Information($"🔍 开始端口检测: 起始={config.BasePort}, 范围={config.MaxPortRange}");

        for (int i = 0; i <= config.MaxPortRange; i++)
        {
            int currentPort = config.BasePort + i;
            if (CheckPortAvailable(currentPort))
            {
                if (currentPort != config.BasePort)
                {
                    logger.Warning($"⚙️ 端口自动漂移: {config.BasePort} -> {currentPort}");
                }
                else
                {
                    logger.Information($"✅ 端口检测通过: {currentPort}");
                }
                return currentPort;
            }
            logger.Debug($"⚠️ 端口 {currentPort} 被占用，尝试下一个...");
        }
        return -1;
    }

    #endregion

    #region CheckPortAvailable

    /// <summary>
    /// 检查端口是否可用
    /// </summary>
    /// <param name="port"></param>
    /// <returns></returns>
    private static bool CheckPortAvailable(int port)
    {
        try
        {
            using var listener = new TcpListener(IPAddress.Any, port);
            listener.Start();
            listener.Stop();
            return true;
        }
        catch
        {
            return false;
        }
    }

    #endregion

    #region WarmUpHardware

    /// <summary>
    /// 硬件预热
    /// </summary>
    public static void WarmUpHardware(ILogger logger)
    {
        logger.Information("Hik Sdk 开始预热.");
        try
        {
            HikNativeMethods.NET_DVR_Init();
            HikSdkManager.ForceWarmUp();
            logger.Information("💡Hik Sdk 预热成功.");
        }
        catch (Exception ex)
        {
            logger.Error(ex, "⚠️ Hik Sdk 预热失败.");
        }
    }

    #endregion

    #region RegisterToGatewayAsync

    /// <summary>
    /// 向网关注册实例
    /// </summary>
    public static async Task RegisterToGatewayAsync(ServiceConfig config, ILogger logger)
    {
        if (!config.CommandEndpoints.Any()) return;

        try
        {
            // 将 tcp:// 转换为 http:// 以适配 gRPC
            string targetUrl = config.CommandEndpoints.First().Uri.Replace("tcp://", "http://");

            using var channel = GrpcChannel.ForAddress(targetUrl);
            var client = new GatewayProvider.GatewayProviderClient(channel);

            logger.Information($"[Grpc] 正在执行预注册: {targetUrl}");
            var resp = await client.RegisterInstanceAsync(new RegisterRequest
            {
                InstanceId = config.AppId,
                Version = "2.0.0-grpc",
                ServerIp = "127.0.0.1",
                WebapiPort = config.BasePort, // 使用扫描后的新端口
                StartTimeTicks = DateTime.Now.Ticks,
                ProcessId = Environment.ProcessId,
                Description = ""
            });
            logger.Information($"💡[Grpc] 预注册成功: {resp.Message}");
        }
        catch (Exception ex)
        {
            logger.Error($"⚠️ [Grpc] 预注册尝试失败: {ex.Message}");
        }
    }

    #endregion
}