using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using OrpaonVision.Core.Results;
using OrpaonVision.SiteApp.Runtime.Contracts;
using OrpaonVision.SiteApp.Runtime.Options;
using OrpaonVision.SiteApp.Runtime.Services;

namespace OrpaonVision.SiteApp.Runtime.Services;

/// <summary>
/// 海康相机服务适配器，将IHikCameraService适配到ICameraService接口。
/// </summary>
public sealed class HikCameraAdapter : ICameraService
{
    private readonly ILogger<HikCameraAdapter> _logger;
    private readonly IHikCameraService _hikCameraService;
    private readonly RuntimeOptions _options;

    /// <summary>
    /// 构造函数。
    /// </summary>
    public HikCameraAdapter(
        ILogger<HikCameraAdapter> logger,
        IHikCameraService hikCameraService,
        IOptions<RuntimeOptions> options)
    {
        _logger = logger;
        _hikCameraService = hikCameraService;
        _options = options.Value;
    }

    /// <inheritdoc />
    public Result<CameraFrameDto> CaptureFrame()
    {
        try
        {
            // 确保相机已连接
            if (!_hikCameraService.IsConnected)
            {
                var connectResult = ConnectDefaultCamera();
                if (!connectResult.Succeeded)
                {
                    return Result<CameraFrameDto>.Fail(connectResult.Code, connectResult.Message, connectResult.Errors.ToArray());
                }
            }

            // 确保相机正在采集
            var frameResult = _hikCameraService.GetLatestFrameWithTimestamp();
            if (!frameResult.Succeeded)
            {
                return Result<CameraFrameDto>.Fail(frameResult.Code, frameResult.Message, frameResult.Errors.ToArray());
            }

            var frame = frameResult.Data;
            frame.FrameId = Guid.NewGuid();
            frame.CameraId = _options.CameraId;

            return Result<CameraFrameDto>.Success(frame, message: "相机采图成功。");
        }
        catch (Exception ex)
        {
            var traceId = Guid.NewGuid().ToString("N");
            _logger.LogError(ex, "相机采图适配失败。TraceId: {TraceId}", traceId);
            var result = Result.FromException(ex, "CAMERA_ADAPTER_CAPTURE_FAILED", "相机采图适配失败。", traceId);
            return Result<CameraFrameDto>.FailWithTrace(result.Code, result.Message, result.TraceId ?? traceId, result.Errors.ToArray());
        }
    }

    /// <summary>
    /// 连接默认相机。
    /// </summary>
    private Result ConnectDefaultCamera()
    {
        try
        {
            _logger.LogInformation("正在连接默认相机...");

            // 枚举设备
            var enumResult = _hikCameraService.EnumerateDevices();
            if (!enumResult.Succeeded || enumResult.Data.Count == 0)
            {
                return Result.Fail("CAMERA_NO_DEVICES", "未发现可用的相机设备。");
            }

            // 尝试连接第一个设备
            var firstDevice = enumResult.Data.First();
            var connectResult = _hikCameraService.ConnectToDevice(firstDevice);
            if (!connectResult.Succeeded)
            {
                return connectResult;
            }

            // 设置相机参数
            var setParamsResult = _hikCameraService.SetCameraParameters(
                width: 1920,
                height: 1080,
                pixelFormat: "BGR8Packed",
                triggerMode: 0);
            if (!setParamsResult.Succeeded)
            {
                _logger.LogWarning("设置相机参数失败: {Message}", setParamsResult.Message);
            }

            // 开始采集
            var startGrabResult = _hikCameraService.StartGrabbing();
            if (!startGrabResult.Succeeded)
            {
                return startGrabResult;
            }

            _logger.LogInformation("默认相机连接并启动采集成功");
            return Result.Success(message: "默认相机连接成功。");
        }
        catch (Exception ex)
        {
            var traceId = Guid.NewGuid().ToString("N");
            _logger.LogError(ex, "连接默认相机失败。TraceId: {TraceId}", traceId);
            var result = Result.FromException(ex, "CAMERA_CONNECT_DEFAULT_FAILED", "连接默认相机失败。", traceId);
            return Result.FailWithTrace(result.Code, result.Message, result.TraceId ?? traceId, result.Errors.ToArray());
        }
    }

    /// <summary>
    /// 初始化相机服务。
    /// </summary>
    public Result Initialize()
    {
        try
        {
            _logger.LogInformation("正在初始化海康相机适配器...");

            // 检查连接状态
            if (_hikCameraService.IsConnected)
            {
                _logger.LogInformation("相机已连接，无需重新连接");
                return Result.Success(message: "相机适配器初始化成功。");
            }

            // 连接默认相机
            var connectResult = ConnectDefaultCamera();
            if (!connectResult.Succeeded)
            {
                return connectResult;
            }

            _logger.LogInformation("海康相机适配器初始化成功");
            return Result.Success(message: "相机适配器初始化成功。");
        }
        catch (Exception ex)
        {
            var traceId = Guid.NewGuid().ToString("N");
            _logger.LogError(ex, "初始化海康相机适配器失败。TraceId: {TraceId}", traceId);
            var result = Result.FromException(ex, "CAMERA_ADAPTER_INIT_FAILED", "初始化相机适配器失败。", traceId);
            return Result.FailWithTrace(result.Code, result.Message, result.TraceId ?? traceId, result.Errors.ToArray());
        }
    }

    /// <summary>
    /// 清理资源。
    /// </summary>
    public void Cleanup()
    {
        try
        {
            if (_hikCameraService.IsConnected)
            {
                _hikCameraService.Disconnect();
                _logger.LogInformation("相机适配器清理完成");
            }
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "清理相机适配器时发生异常");
        }
    }
}