using System.Text.Json.Nodes;
using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.AdminUI.Uns.TagEditors;
using ZB.MOM.WW.OtOpcUa.Core.Abstractions;

namespace ZB.MOM.WW.OtOpcUa.AdminUI.Tests.Uns;

/// <summary>Gitea #642 — the shared NativeAlarmEditor's pure-model behaviour: remove-on-off, composition
/// with the per-driver editors' models, validation parity with the deploy gate, driver-type gating.</summary>
public sealed class NativeAlarmEditorModelTests
{
    [Fact]
    public void ToJson_with_IsAlarm_false_removes_the_alarm_key_and_keeps_the_rest()
    {
        var m = NativeAlarmModel.FromJson("""{"FullName":"X.Y","alarm":{"alarmType":"LimitAlarm","severity":300,"extra":1}}""");
        m.IsAlarm = false;

        var o = JsonNode.Parse(m.ToJson())!.AsObject();
        o.ContainsKey("alarm").ShouldBeFalse();
        o["FullName"]!.GetValue<string>().ShouldBe("X.Y");
    }

    [Fact]
    public void Toggle_off_then_on_again_starts_from_defaults()
    {
        var off = NativeAlarmModel.Edit("""{"alarm":{"severity":300}}""", m => m.IsAlarm = false);
        var on = NativeAlarmModel.Edit(off, m => m.IsAlarm = true);
        var back = NativeAlarmModel.FromJson(on);
        back.IsAlarm.ShouldBeTrue();
        back.Severity.ShouldBe(500);
        back.AlarmType.ShouldBe("AlarmCondition");
    }

    [Fact]
    public void Edit_preserves_unknown_keys_at_both_levels()
    {
        var json = NativeAlarmModel.Edit("""{"FullName":"A","zz":1,"alarm":{"alarmType":"OffNormalAlarm","custom":"k"}}""",
            m => m.Severity = 900);
        var o = JsonNode.Parse(json)!.AsObject();
        o["zz"]!.GetValue<int>().ShouldBe(1);
        o["alarm"]!["custom"]!.GetValue<string>().ShouldBe("k");
        o["alarm"]!["severity"]!.GetValue<int>().ShouldBe(900);
    }

    [Fact]
    public void Alarm_and_mtconnect_driver_editor_compose_in_either_order()
    {
        const string start = """{"fullName":"Xact"}""";

        // alarm first, then driver editor (driver model re-parses the alarm-bearing JSON)
        var a1 = NativeAlarmModel.Edit(start, m => { m.IsAlarm = true; m.Severity = 800; });
        var d1 = MTConnectTagConfigModel.FromJson(a1);
        d1.FullName = "Yact";
        var r1 = d1.ToJson();

        // driver editor first, then alarm
        var d2 = MTConnectTagConfigModel.FromJson(start);
        d2.FullName = "Yact";
        var r2 = NativeAlarmModel.Edit(d2.ToJson(), m => { m.IsAlarm = true; m.Severity = 800; });

        foreach (var r in new[] { r1, r2 })
        {
            var o = JsonNode.Parse(r)!.AsObject();
            o["fullName"]!.GetValue<string>().ShouldBe("Yact");
            o["alarm"]!["severity"]!.GetValue<int>().ShouldBe(800);
        }
    }

    [Theory]
    [InlineData("Modbus")]
    [InlineData("S7")]
    [InlineData("AbCip")]
    [InlineData("AbLegacy")]
    [InlineData("TwinCAT")]
    [InlineData("FOCAS")]
    [InlineData("OpcUaClient")]
    [InlineData("Sql")]
    [InlineData("Mqtt")]
    [InlineData("MTConnect")]
    public void Every_typed_driver_model_preserves_an_alarm_object(string driverType)
    {
        const string json = """{"alarm":{"alarmType":"LimitAlarm","severity":123}}""";
        var round = TagConfigRoundTrip.Through(driverType, json);
        NativeAlarmModel.FromJson(round).Severity.ShouldBe(123);
    }

    [Fact]
    public void Validate_is_not_stricter_than_the_deploy_gate()
    {
        // The gate/parser accepts any severity (clamped 1..1000 at publish) and any alarmType string.
        var m = NativeAlarmModel.FromJson("""{"alarm":{"alarmType":"Whatever","severity":5000}}""");
        m.Validate().ShouldBeNull();
        m.Warnings().ShouldNotBeEmpty();   // advisory only
    }

    [Fact]
    public void SupportsNativeAlarms_covers_exactly_the_IAlarmSource_drivers()
    {
        foreach (var t in new[] { DriverTypeNames.MTConnect, DriverTypeNames.AbCip, DriverTypeNames.FOCAS,
                     DriverTypeNames.OpcUaClient, DriverTypeNames.Galaxy })
            NativeAlarmModel.SupportsNativeAlarms(t).ShouldBeTrue(t);
        foreach (var t in new[] { DriverTypeNames.Modbus, DriverTypeNames.S7, DriverTypeNames.Mqtt, null })
            NativeAlarmModel.SupportsNativeAlarms(t).ShouldBeFalse(t);
    }
}