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

namespace ZB.MOM.WW.LmxOpcUa.Tests.OpcUa
{
    /// <summary>
    /// Verifies translation between bridge quality values and OPC UA status codes.
    /// </summary>
    public class OpcUaQualityMapperTests
    {
        /// <summary>
        /// Confirms that good bridge quality maps to an OPC UA good status.
        /// </summary>
        [Fact]
        public void Good_MapsToGoodStatusCode()
        {
            var sc = OpcUaQualityMapper.ToStatusCode(Quality.Good);
            StatusCode.IsGood(sc).ShouldBe(true);
        }

        /// <summary>
        /// Confirms that bad bridge quality maps to an OPC UA bad status.
        /// </summary>
        [Fact]
        public void Bad_MapsToBadStatusCode()
        {
            var sc = OpcUaQualityMapper.ToStatusCode(Quality.Bad);
            StatusCode.IsBad(sc).ShouldBe(true);
        }

        /// <summary>
        /// Confirms that uncertain bridge quality maps to an OPC UA uncertain status.
        /// </summary>
        [Fact]
        public void Uncertain_MapsToUncertainStatusCode()
        {
            var sc = OpcUaQualityMapper.ToStatusCode(Quality.Uncertain);
            StatusCode.IsUncertain(sc).ShouldBe(true);
        }

        /// <summary>
        /// Confirms that communication failures map to a bad OPC UA status code.
        /// </summary>
        [Fact]
        public void BadCommFailure_MapsCorrectly()
        {
            var sc = OpcUaQualityMapper.ToStatusCode(Quality.BadCommFailure);
            StatusCode.IsBad(sc).ShouldBe(true);
        }

        /// <summary>
        /// Confirms that the OPC UA good status maps back to bridge good quality.
        /// </summary>
        [Fact]
        public void FromStatusCode_Good()
        {
            var q = OpcUaQualityMapper.FromStatusCode(StatusCodes.Good);
            q.ShouldBe(Quality.Good);
        }

        /// <summary>
        /// Confirms that the OPC UA bad status maps back to bridge bad quality.
        /// </summary>
        [Fact]
        public void FromStatusCode_Bad()
        {
            var q = OpcUaQualityMapper.FromStatusCode(StatusCodes.Bad);
            q.ShouldBe(Quality.Bad);
        }

        /// <summary>
        /// Confirms that the OPC UA uncertain status maps back to bridge uncertain quality.
        /// </summary>
        [Fact]
        public void FromStatusCode_Uncertain()
        {
            var q = OpcUaQualityMapper.FromStatusCode(StatusCodes.Uncertain);
            q.ShouldBe(Quality.Uncertain);
        }
    }
}