using Junction.Domain.Protocols;
using Xunit;

namespace Junction.Tests.Unit
{
    /// <summary>
    /// Tests for the plugin manifest POCO models. Data-only: no serialization here
    /// (JSON parse lives in Core). Covers construction, immutability, null handling,
    /// and the manifest+path pairing of <see cref="PluginDescriptor"/>.
    /// </summary>
    public class PluginManifestTests
    {
        [Fact]
        public void Manifest_Ctor_HoldsAllValues()
        {
            var m = new PluginManifest(
                "mtconnect",
                "MTConnect Driver",
                "Junction.Protocols.MTConnect.dll",
                "Junction.Protocols.MTConnect.MTConnectDriverFactory",
                "1.0");

            Assert.Equal("mtconnect", m.ProtocolId);
            Assert.Equal("MTConnect Driver", m.DisplayName);
            Assert.Equal("Junction.Protocols.MTConnect.dll", m.AssemblyFile);
            Assert.Equal("Junction.Protocols.MTConnect.MTConnectDriverFactory", m.EntryTypeName);
            Assert.Equal("1.0", m.ApiVersion);
        }

        [Fact]
        public void Manifest_NullStrings_DefaultToEmpty()
        {
            var m = new PluginManifest(null!, null!, null!, null!, null!);

            Assert.Equal("", m.ProtocolId);
            Assert.Equal("", m.DisplayName);
            Assert.Equal("", m.AssemblyFile);
            Assert.Equal("", m.EntryTypeName);
            Assert.Equal("", m.ApiVersion);
        }

        [Fact]
        public void Manifest_Properties_AreGetOnly()
        {
            var props = typeof(PluginManifest).GetProperties();
            Assert.All(props, p => Assert.Null(p.SetMethod));
        }

        [Fact]
        public void Descriptor_Ctor_PairsManifestAndPath()
        {
            var m = new PluginManifest("mtconnect", "MTConnect", "p.dll", "T", "1.0");
            var d = new PluginDescriptor(m, "/opt/junction/plugins/mtconnect/p.dll");

            Assert.Same(m, d.Manifest);
            Assert.Equal("/opt/junction/plugins/mtconnect/p.dll", d.AssemblyPath);
        }

        [Fact]
        public void Descriptor_NullPath_DefaultsToEmpty()
        {
            var m = new PluginManifest("mtconnect", "MTConnect", "p.dll", "T", "1.0");
            var d = new PluginDescriptor(m, null!);

            Assert.Equal("", d.AssemblyPath);
        }

        [Fact]
        public void Descriptor_Properties_AreGetOnly()
        {
            var props = typeof(PluginDescriptor).GetProperties();
            Assert.All(props, p => Assert.Null(p.SetMethod));
        }
    }
}