using Opc.Ua;
using Shouldly;
using Xunit;
using ZB.MOM.WW.LmxOpcUa.Host.OpcUa;

namespace ZB.MOM.WW.LmxOpcUa.Tests.Redundancy
{
    public class RedundancyModeResolverTests
    {
        [Fact]
        public void Resolve_Disabled_ReturnsNone()
        {
            RedundancyModeResolver.Resolve("Warm", enabled: false).ShouldBe(RedundancySupport.None);
        }

        [Fact]
        public void Resolve_Warm_ReturnsWarm()
        {
            RedundancyModeResolver.Resolve("Warm", enabled: true).ShouldBe(RedundancySupport.Warm);
        }

        [Fact]
        public void Resolve_Hot_ReturnsHot()
        {
            RedundancyModeResolver.Resolve("Hot", enabled: true).ShouldBe(RedundancySupport.Hot);
        }

        [Fact]
        public void Resolve_Unknown_FallsBackToNone()
        {
            RedundancyModeResolver.Resolve("Transparent", enabled: true).ShouldBe(RedundancySupport.None);
        }

        [Fact]
        public void Resolve_CaseInsensitive()
        {
            RedundancyModeResolver.Resolve("warm", enabled: true).ShouldBe(RedundancySupport.Warm);
            RedundancyModeResolver.Resolve("WARM", enabled: true).ShouldBe(RedundancySupport.Warm);
            RedundancyModeResolver.Resolve("hot", enabled: true).ShouldBe(RedundancySupport.Hot);
        }

        [Fact]
        public void Resolve_Null_FallsBackToNone()
        {
            RedundancyModeResolver.Resolve(null!, enabled: true).ShouldBe(RedundancySupport.None);
        }

        [Fact]
        public void Resolve_Empty_FallsBackToNone()
        {
            RedundancyModeResolver.Resolve("", enabled: true).ShouldBe(RedundancySupport.None);
        }
    }
}