using Serilog.Events;
using Xunit;
using YZWater.Core.Services;

namespace YZWater.Core.Tests.Services;

/// <summary>
/// 测点数据质量事件的记录方式回归。
/// 背景：现场报警历史被"测点 X 读取失败 / 已恢复"刷满 —— 一次抖动就是"点位数 × 2"行，
/// 真报警被埋掉，而且这些行是系统自动确认的流水，操作员既确认不了也复位不了，
/// 误点复位还会让程序往 PLC 的复位地址写一次脉冲。
/// 现在一轮最多两条汇总（明细仍在日志文件里），且带独立类型 Quality。
/// </summary>
[Collection("Serilog minimum level")]
public class QualityJournalTests : IDisposable
{
    private readonly LogEventLevel _originalLevel = LogService.MinimumLevel;
    private readonly AlarmService _service;

    public QualityJournalTests()
    {
        LogService.ApplyMinimumLevel("Error");
        _service = new AlarmService(PlcPollingService.Instance);
    }

    public void Dispose()
    {
        _service.Dispose();
        LogService.ApplyMinimumLevel(_originalLevel.ToString());
    }

    [Fact]
    public void TwentyBadTags_SummarizeIntoOneMessage_NotTwenty()
    {
        var lost = Enumerable.Range(1, 20).Select(i => $"{i}#泵.Run").ToList();

        var (lostMessage, restoredMessage) =
            PlcPollingService.BuildQualityJournalMessages(lost, new List<string>());

        Assert.Null(restoredMessage);
        Assert.NotNull(lostMessage);
        var message = lostMessage!;
        // 一条消息讲清规模，而不是一个点一条流水
        Assert.Contains("20", message);
        Assert.Contains("共 20 个", message);
        // 清单截断到前 8 个，避免整张点位表被塞进一条记录
        Assert.DoesNotContain("20#泵.Run", message);
        Assert.Contains("8#泵.Run", message);
        // 键名拼错时 LanguageService 会原样返回键，这条断言保证模板真的解析了
        Assert.DoesNotContain("TagQualityLostSummary", message);
    }

    [Fact]
    public void LostAndRestored_ProduceTwoSeparateMessages()
    {
        var (lost, restored) = PlcPollingService.BuildQualityJournalMessages(
            new List<string> { "DI.高压报警" }, new List<string> { "1#泵.Fault", "2#泵.Fault" });

        Assert.NotNull(lost);
        Assert.Contains("DI.高压报警", lost);
        Assert.NotNull(restored);
        Assert.Contains("1#泵.Fault", restored);
        Assert.DoesNotContain("DI.高压报警", restored);
    }

    [Fact]
    public void NoTransitions_ProduceNoRows()
    {
        var (lost, restored) = PlcPollingService.BuildQualityJournalMessages(
            new List<string>(), new List<string>());

        Assert.Null(lost);
        Assert.Null(restored);
    }

    /// <summary>
    /// 诊断流水不得进入活跃报警集合 —— 否则它会占用报警位、被升级/泛溢逻辑统计，
    /// 还会让"复位"误以为有东西可复位而去写 PLC。
    /// </summary>
    [Fact]
    public void JournalAlarm_NeverBecomesAnActiveAlarm()
    {
        _service.RecordJournalAlarm("1 个测点读取失败：1#泵.Run", level: 1, alarmType: "Quality");

        Assert.Equal(0, _service.ActiveAlarmCount);
        Assert.False(_service.HasActiveAlarm);
    }
}