using System.Text.Json;
using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Runtime.Drivers;

namespace ZB.MOM.WW.OtOpcUa.Runtime.Tests.Drivers;

/// <summary>
///     Verifies the artifact-decode mirror substitutes the reserved <c>{{equip}}</c> token in a
///     VirtualTag script's <c>ctx.GetTag("…")</c> literals with the owning equipment's tag base
///     (derived from its child Equipment-namespace tag's FullName) — byte-parity with
///     <c>Phase7Composer.Compose</c>'s live-edit path, using the same shared
///     <c>EquipmentScriptPaths</c> helper and the same equipmentTags-derived base.
/// </summary>
public sealed class DeploymentArtifactEquipTokenTests
{
    [Fact]
    public void ParseComposition_substitutes_equip_token_in_virtual_tag_expression()
    {
        var blob = JsonSerializer.SerializeToUtf8Bytes(new
        {
            Namespaces = new[]
            {
                new { NamespaceId = "ns-eq", Kind = 0 }, // NamespaceKind.Equipment
            },
            DriverInstances = new[]
            {
                new { DriverInstanceId = "drv-modbus", DriverType = "Modbus", DriverConfig = "{}", NamespaceId = "ns-eq" },
            },
            Tags = new object[]
            {
                new
                {
                    TagId = "tag-source",
                    DriverInstanceId = "drv-modbus",
                    EquipmentId = "TestMachine_001",
                    Name = "Source",
                    FolderPath = (string?)null,
                    DataType = "Float",
                    TagConfig = "{\"FullName\":\"TestMachine_001.Source\"}",
                },
            },
            Scripts = new[]
            {
                new
                {
                    ScriptId = "s-equip",
                    SourceCode = "return System.Convert.ToInt32(ctx.GetTag(\"{{equip}}.Source\").Value) > 50;",
                },
            },
            VirtualTags = new[]
            {
                new
                {
                    VirtualTagId = "vt-equip",
                    EquipmentId = "TestMachine_001",
                    Name = "OverThreshold",
                    DataType = "Boolean",
                    ScriptId = "s-equip",
                },
            },
        });

        var c = DeploymentArtifact.ParseComposition(blob);

        var vt = c.EquipmentVirtualTags.ShouldHaveSingleItem();
        vt.Expression.ShouldContain("ctx.GetTag(\"TestMachine_001.Source\")");
        vt.Expression.ShouldNotContain("{{equip}}");
        vt.DependencyRefs.ShouldBe(new[] { "TestMachine_001.Source" });
    }
}