using Grpc.Net.Client;
using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.OpenApi.Models;
using SHH.CameraSdk;
using SHH.Contracts.Grpc;
using Microsoft.Extensions.Logging;

namespace SHH.CameraService;

public class Program
{
    public static async Task Main(string[] args)
    {
        // 2. 硬件预热 (静态方法保留)
        HikNativeMethods.NET_DVR_Init();
        HikSdkManager.ForceWarmUp();

        // 1. [核心环境] 必须在所有网络操作前开启
        AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", true);

        // 2. 模拟/解析配置
        if (args.Length == 0)
        {
            string serviceArgs = "--appid CameraApp_01 " +
                                 "--uris localhost,9001,video,调试PC; " +
                                 "--uris localhost,9001,command,调试PC; " +
                                 "--mode 1 --ports 5000,100";
            args = serviceArgs.Split(' ', StringSplitOptions.RemoveEmptyEntries);
        }
        var config = ServiceConfig.BuildFromArgs(args);

        // =============================================================
        // 3. 【强行复刻成功逻辑】 在 Web 容器启动前直接执行注册
        // =============================================================
        if (config.CommandEndpoints.Any())
        {
            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);
                
                Console.WriteLine($"[gRPC] 正在执行预注册 (环境: 纯净): {targetUrl}");
                var resp = await client.RegisterInstanceAsync(new RegisterRequest
                {
                    InstanceId = config.AppId,
                    Version = "2.0.0-grpc",
                    ServerIp = "127.0.0.1",
                    WebApiPort = config.BasePort,
                    StartTimeTicks = DateTime.Now.Ticks,
                    ProcessId = Environment.ProcessId,
                    Description = "Camera Service"
                });
                Console.WriteLine($"[gRPC] 预注册成功: {resp.Message}");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"[gRPC] 预注册尝试失败 (不影响启动): {ex.Message}");
            }
        }

        // =============================================================
        // 4. 构建 Web 主机环境
        // =============================================================
        var builder = WebApplication.CreateBuilder(args);

        // 基础业务单例注册
        builder.Services.AddSingleton(config);
        builder.Services.AddSingleton<ProcessingConfigManager>();
        builder.Services.AddSingleton(sp => new ImageScaleCluster(4, sp.GetRequiredService<ProcessingConfigManager>()));
        builder.Services.AddSingleton(sp => new ImageEnhanceCluster(4, sp.GetRequiredService<ProcessingConfigManager>()));
        builder.Services.AddHostedService<PipelineConfigurator>();

        // 接入 SDK 核心逻辑
        builder.Services.AddCameraSdk(config.NumericId);
        builder.Services.AddHostedService<CameraEngineWorker>();

        // ★ 注册 gRPC 版本的状态监控工作者 (不讲道理，直接注册)
        builder.Services.AddHostedService<DeviceStateMonitorWorker>();
        builder.Services.AddHostedService<ParentProcessSentinel>();
        builder.Services.AddHostedService<GrpcCommandReceiverWorker>();

        // =============================================================
        // 5. 视频流 Target 注册 (gRPC 模式)
        // =============================================================
        var netTargets = new List<StreamTarget>();
        if (config.VideoEndpoints != null)
        {
            foreach (var cfgVideo in config.VideoEndpoints)
            {
                netTargets.Add(new StreamTarget(new PushTargetConfig
                {
                    Name = cfgVideo.Description,
                    Endpoint = cfgVideo.Uri,
                    QueueCapacity = 10,
                }));
            }
        }
        builder.Services.AddSingleton<IEnumerable<StreamTarget>>(netTargets);
        builder.Services.AddHostedService<NetworkStreamingWorker>();

        // 为每个 Target 绑定一个 gRPC 流发送者
        foreach (var target in netTargets)
        {
            builder.Services.AddHostedService(sp => 
                new GrpcSenderWorker(target, sp.GetRequiredService<ILogger<GrpcSenderWorker>>()));
        }

        // 注册指令分发 (不再使用 NetMQ 的 CommandClientWorker)
        builder.Services.AddSingleton<InterceptorPipeline>();
        builder.Services.AddSingleton<CommandDispatcher>();
        builder.Services.AddSingleton<ICommandHandler, SyncCameraHandler>();
        builder.Services.AddSingleton<ICommandHandler, RemoveCameraHandler>();

        ConfigureWebServices(builder, config);

        // =============================================================
        // 6. 启动服务
        // =============================================================
        var app = builder.Build();

        // 激活 SDK 管理器并启动业务点火
        await StartBusinessLogic(app);

        app.UseSwagger();
        app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", $"SHH Gateway #{config.AppId}"));

        app.MapGet("/", () => $"SHH Gateway {config.AppId} is running (gRPC Mode).");
        app.UseCors("AllowAll");
        app.MapControllers();

        Console.WriteLine($"[System] 正在启动 Web 服务，监听端口: {config.BasePort}");
        await app.RunAsync($"http://0.0.0.0:{config.BasePort}");
    }

    /// <summary>
    /// 激活单例并启动相机管理器
    /// </summary>
    static async Task StartBusinessLogic(WebApplication app)
    {
        var manager = app.Services.GetRequiredService<CameraManager>();
        _ = app.Services.GetRequiredService<ConnectivitySentinel>();
        await manager.StartAsync();
        Console.WriteLine("[System] 核心业务逻辑已激活。");
    }

    /// <summary>
    /// 注册 Web API 支持
    /// </summary>
    static void ConfigureWebServices(WebApplicationBuilder builder, ServiceConfig cfg)
    {
        builder.Services.AddCors(options =>
        {
            options.AddPolicy("AllowAll", p => p.AllowAnyOrigin().AllowAnyHeader().AllowAnyMethod());
        });

        builder.Services.AddControllers(options =>
        {
            options.Filters.Add<UserActionFilter>();
        })
        .AddApplicationPart(typeof(CamerasController).Assembly)
        .AddApplicationPart(typeof(MonitorController).Assembly);

        builder.Services.AddEndpointsApiExplorer();
        builder.Services.AddSwaggerGen(c =>
        {
            c.SwaggerDoc("v1", new OpenApiInfo { Title = $"SHH Gateway #{cfg.AppId}", Version = "v1" });
        });
    }
}