using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using RIZO.Service.PLC;
using S7.Net;
using System;
using System.Threading;
using System.Threading.Tasks;

namespace RIZO.Service.PLCBackground
{


    public class PlcPollingServiceOP72 : BackgroundService
    {
        private readonly ILogger<PlcPollingServiceOP72> _logger;
        private readonly PlcService _plcService;
        private readonly TimeSpan _pollingInterval = TimeSpan.FromSeconds(5);

        public PlcPollingServiceOP72(ILogger<PlcPollingServiceOP72> logger)
        {
            _logger = logger;
            // 配置PLC连接参数（根据实际设备修改）
            _plcService = new PlcService("192.168.0.1", CpuType.S71500);
        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            _logger.LogInformation("PLC Polling Service started");

            // 不断轮询PLC数据
            while (!stoppingToken.IsCancellationRequested)
            {
                try
                {
                    // 示例：读取DB块数据
                    var data1 = _plcService.Read("DB1.DBW0");   // 读取字
                    var data2 = _plcService.Read("DB1.DBD4");   // 读取双字
                    var flag = _plcService.Read("M10.0");       // 读取标志位

                    _logger.LogInformation($"DB1.DBW0: {data1}, DB1.DBD4: {data2}, M10.0: {flag}");

                    // 示例：写入数据到PLC
                    _plcService.Write("DB1.DBW10", (short)123);  // 写入字
                    _plcService.Write("DB1.DBD20", 45.67d);      // 写入浮点数

                    await Task.Delay(_pollingInterval, stoppingToken);
                }
                catch (OperationCanceledException)
                {
                    break;
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex, "PLC polling error");
                    await Task.Delay(TimeSpan.FromSeconds(10), stoppingToken); // 错误后延迟重试
                }
            }

            _plcService.Dispose();
            _logger.LogInformation("PLC Polling Service stopped");
        }
    }
}