using System;
using System.Net;
using System.Threading;
using System.Threading.Tasks;
using CoreAgent.Application.Commands.RanAPI;
using CoreAgent.Domain.Interfaces.Network;
using CoreAgent.Domain.Models.Common;
using MediatR;
using Microsoft.Extensions.Logging;

namespace CoreAgent.Application.Handlers.RanAPI;

/// <summary>
/// 设置发送增益命令处理器
/// </summary>
public class SetTxGainCommandHandler : IRequestHandler<SetTxGainCommand, ApiActionResult<bool>>
{
    private readonly IRanAPICommandHandlerFactory _ranAPICommandHandlerFactory;
    private readonly ILogger<SetTxGainCommandHandler> _logger;

    /// <summary>
    /// 构造函数
    /// </summary>
    /// <param name="ranAPICommandHandlerFactory">RAN API命令处理器工厂</param>
    /// <param name="logger">日志记录器</param>
    public SetTxGainCommandHandler(
        IRanAPICommandHandlerFactory ranAPICommandHandlerFactory,
        ILogger<SetTxGainCommandHandler> logger)
    {
        _ranAPICommandHandlerFactory = ranAPICommandHandlerFactory ?? throw new ArgumentNullException(nameof(ranAPICommandHandlerFactory));
        _logger = logger ?? throw new ArgumentNullException(nameof(logger));
    }

    /// <summary>
    /// 处理设置发送增益命令
    /// </summary>
    /// <param name="request">设置发送增益命令</param>
    /// <param name="cancellationToken">取消令牌</param>
    /// <returns>设置发送增益结果</returns>
    public async Task<ApiActionResult<bool>> Handle(SetTxGainCommand request, CancellationToken cancellationToken)
    {
        try
        {
            _logger.LogInformation("正在设置发送增益，端口数量: {PortCount}", request.GainSettings?.Count);

            // 通过工厂获取RAN增益控制处理器并执行操作
            var ranGainControlHandler = _ranAPICommandHandlerFactory.CreateGainControlHandler();
            var result = await ranGainControlHandler.SetTxGainAsync(request.GainSettings);

            if (result)
            {
                _logger.LogInformation("发送增益设置成功");
                return ApiActionResult<bool>.Ok(true, "发送增益设置成功");
            }
            else
            {
                _logger.LogWarning("发送增益设置失败");
                return ApiActionResult<bool>.Error(
                    "发送增益设置失败",
                    "TX_GAIN_SET_FAILED",
                    HttpStatusCode.BadRequest);
            }
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "设置发送增益失败");
            return ApiActionResult<bool>.Error(
                $"设置发送增益失败: {ex.Message}",
                "INTERNAL_ERROR",
                HttpStatusCode.InternalServerError);
        }
    }
}