using CoreAgent.Application.Commands.System;
using CoreAgent.Domain.Interfaces.System;
using CoreAgent.Domain.Models.Common;
using CoreAgent.Domain.Models.System;
using MediatR;
using Microsoft.Extensions.Logging;

namespace CoreAgent.Application.Handlers.System;

/// <summary>
/// 获取设备序列号命令处理器
/// </summary>
public class GetSerialNumberCommandHandler : IRequestHandler<GetSerialNumberCommand, ApiActionResult<DeviceInfoResponse>>
{
    private readonly IDeviceService _deviceService;
    private readonly ILogger<GetSerialNumberCommandHandler> _logger;

    public GetSerialNumberCommandHandler(
        IDeviceService deviceService,
        ILogger<GetSerialNumberCommandHandler> logger)
    {
        _deviceService = deviceService ?? throw new ArgumentNullException(nameof(deviceService));
        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
    }

    public async Task<ApiActionResult<DeviceInfoResponse>> Handle(GetSerialNumberCommand request, CancellationToken cancellationToken)
    {
        try
        {
            _logger.LogInformation("开始处理获取设备序列号命令");
            
            var deviceInfo = await _deviceService.GetSerialNumberAsync();
            
            if (deviceInfo.IsSuccess)
            {
                _logger.LogInformation("成功获取设备序列号: {SerialNumber}", deviceInfo.SerialNumber);
                
                // 创建DeviceInfoResponse对象，不包含IsSuccess字段
                var resultDeviceInfo = new DeviceInfoResponse
                {
                    SerialNumber = deviceInfo.SerialNumber,
                    Timestamp = deviceInfo.Timestamp
                };
                
                return ApiActionResult<DeviceInfoResponse>.Ok(resultDeviceInfo, "获取设备序列号成功");
            }
            else
            {
                _logger.LogWarning("获取设备序列号失败，返回的序列号: {SerialNumber}", deviceInfo.SerialNumber);
                return ApiActionResult<DeviceInfoResponse>.Error("获取设备序列号失败", "DEVICE_SN_NOT_FOUND");
            }
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "处理获取设备序列号命令时发生异常");
            return ApiActionResult<DeviceInfoResponse>.Error("获取设备序列号失败", "DEVICE_SN_ERROR");
        }
    }
}