using Xunit;
using YZWater.Core.Models;
using YZWater.Core.Services;

namespace YZWater.Core.Tests.Services;

/// <summary>
/// ISA-18.2 报警管理 + 数据缺口 单元测试（搁置状态、配置默认值、缺口时长计算）
/// </summary>
public class AlarmManagementTests
{
    [Fact]
    public void Shelve_ShouldMarkConditionAsShelved()
    {
        var service = AlarmService.Instance;
        service.Shelve("TestTank_High", 30, "Tester");

        Assert.True(service.IsShelved("TestTank_High"));
        Assert.Contains(service.GetShelvedAlarms(), s => s.ConditionId == "TestTank_High");

        service.Unshelve("TestTank_High", "Tester");
        Assert.False(service.IsShelved("TestTank_High"));
    }

    [Fact]
    public void Shelve_InvalidArgs_ShouldBeIgnored()
    {
        var service = AlarmService.Instance;
        service.Shelve("TestTank_Invalid", 0);
        Assert.False(service.IsShelved("TestTank_Invalid"));
    }

    [Fact]
    public void IsShelved_UnknownCondition_ShouldBeFalse()
    {
        Assert.False(AlarmService.Instance.IsShelved("NoSuchCondition"));
    }

    [Fact]
    public void AlarmManagementConfig_Defaults()
    {
        var config = new AlarmManagementConfig();
        Assert.True(config.EnableFloodSuppression);
        Assert.Equal(6, config.FloodRaiseThreshold);
        Assert.Equal(60, config.FloodWindowSeconds);
        Assert.True(config.EnableFirstOut);
        Assert.Equal(5, config.FirstOutWindowSeconds);
        Assert.Equal(30, config.DefaultShelveMinutes);
    }

    [Fact]
    public void SystemConfig_ShouldExposeAlarmSection()
    {
        var config = new SystemConfig();
        Assert.NotNull(config.Alarm);
        Assert.Equal(6, config.Alarm.FloodRaiseThreshold);
    }

    [Fact]
    public void DataGapRecord_OpenGap_DurationTextUsesNow()
    {
        var gap = new DataGapRecord { StartTime = DateTime.Now.AddMinutes(-5) };
        Assert.True(gap.IsOpen);
        Assert.Contains("m", gap.DurationText);
    }

    [Fact]
    public void DataGapRecord_ClosedGap_DurationTextUsesRange()
    {
        var start = new DateTime(2026, 9, 25, 10, 0, 0);
        var gap = new DataGapRecord { StartTime = start, EndTime = start.AddMinutes(30) };
        Assert.False(gap.IsOpen);
        Assert.Equal("30m 0s", gap.DurationText);
    }
}