using System.Threading;
using IvfTl.Hardware.HilTests.Infrastructure;
using IvfTl.Hardware.Impl;
using Xunit;
using Xunit.Abstractions;

namespace IvfTl.Hardware.HilTests
{
    /// <summary>
    /// M-05 防回归:0x12 写 E方回包帧长修复为 12 后,读路径不被残留字节污染。
    /// 帧长若回退为 6,写后残留字节会错位污染紧接的读 → 出现 -1/垃圾值。
    /// 纯读变体:连续多轮读排气阀时间,断言全部 sane 非负。纯 0x11 读,无电机,非破坏。
    /// (帧长表本身另由 ivf_tl_SerialHelper.Tests/CustomProtocolLengthTests 单测逐项锁死。)
    /// </summary>
    [Collection("HIL")]
    public class FrameLengthHilTests
    {
        private readonly HardwareRigFixture _rig;
        private readonly ITestOutputHelper _out;
        public FrameLengthHilTests(HardwareRigFixture rig, ITestOutputHelper o) { _rig = rig; _out = o; }

        [SkippableFact]
        public void RepeatedReads_AreClean_NoFrameCorruption()
        {
            var chamber = _rig.FirstChamberWithWells();
            Skip.If(chamber == null, "无响应真舱:无硬件 / control 正占用串口 / 未连接");

            const int rounds = 12;
            int clean = 0;
            SerialChannelImpl ch = null;
            try
            {
                ch = new SerialChannelImpl(0, chamber.Port);
                Assert.True(ch.Open(), $"{chamber.Port} 打开失败");
                for (int r = 0; r < rounds; r++)
                {
                    int v = ch.ReadOpenVentTimeWait();
                    if (v >= 0) clean++;
                    else _out.WriteLine($"轮{r} 读={v}(脏/无响应)");
                    Thread.Sleep(80);
                }
            }
            finally { try { ch?.Close(); } catch { } }

            _out.WriteLine($"舱{chamber.HouseSn} 连续读 {rounds} 轮,干净 {clean}/{rounds}");
            Assert.Equal(rounds, clean); // 帧长正确则每轮都 sane;有错位则出现 -1
        }
    }
}