using Shouldly;
using Xunit;

namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.SqlServer.Tests;

public sealed class SchemaScriptTests
{
    [Fact]
    public void Go_splitting_ignores_go_inside_other_text_and_drops_empties()
    {
        var parts = SqlServerSchemaBootstrapper.SplitBatches("A\nGO\n  go  \nB GO C\nGO\n").ToArray();
        parts.ShouldBe(["A", "B GO C"]);
    }

    [Fact]
    public void Embedded_script_is_present_and_matches_the_docs_copy()
    {
        var asm = typeof(SqlServerSchemaBootstrapper).Assembly;
        using var s = asm.GetManifestResourceStream("Schema.001_initial.sql");
        s.ShouldNotBeNull();
        var text = new StreamReader(s!).ReadToEnd();
        text.ShouldContain("$(Schema)");
        text.ShouldContain("PRIMARY KEY NONCLUSTERED");
        text.ShouldContain("CREATE CLUSTERED INDEX CX_Event_Time");
        text.ShouldNotContain("IX_Event_Time");

        var dir = new DirectoryInfo(AppContext.BaseDirectory);
        while (dir is not null && !File.Exists(Path.Combine(dir.FullName, "ZB.MOM.WW.OtOpcUa.slnx"))) dir = dir.Parent;
        dir.ShouldNotBeNull();
        File.ReadAllText(Path.Combine(dir!.FullName, "docs/historian/sqlserver/001_initial.sql")).ShouldBe(text);
    }

    /// <summary>
    ///     #668: schema v2 (the Part 11 modification trail) is embedded, matches its docs copy, records version 2 (which
    ///     must equal <see cref="SqlServerSchemaBootstrapper.RequiredVersion"/>), and carries none of the constructs an
    ///     <c>OUTPUT … INTO</c> target forbids (FOREIGN KEY / CHECK / trigger) — any of them would fail every HistoryUpdate.
    /// </summary>
    [Fact]
    public void Schema_v2_sample_modified_is_embedded_matches_the_docs_copy_and_is_a_legal_output_into_target()
    {
        var asm = typeof(SqlServerSchemaBootstrapper).Assembly;
        using var s = asm.GetManifestResourceStream("Schema.002_sample_modified.sql");
        s.ShouldNotBeNull();
        var text = new StreamReader(s!).ReadToEnd();
        text.ShouldContain("[SampleModified]");
        text.ShouldContain("PRIMARY KEY CLUSTERED (TagId, SourceTimeUtc, ModifiedId)");
        text.ShouldContain("VALUES (2, SYSUTCDATETIME())");
        SqlServerSchemaBootstrapper.RequiredVersion.ShouldBe(2);
        var ddl = string.Join('\n', text.Split('\n').Where(l => !l.TrimStart().StartsWith("--", StringComparison.Ordinal)));
        ddl.ShouldNotContain("FOREIGN KEY", Case.Insensitive);
        ddl.ShouldNotContain("CHECK", Case.Insensitive);
        ddl.ShouldNotContain("TRIGGER", Case.Insensitive);

        var dir = new DirectoryInfo(AppContext.BaseDirectory);
        while (dir is not null && !File.Exists(Path.Combine(dir.FullName, "ZB.MOM.WW.OtOpcUa.slnx"))) dir = dir.Parent;
        File.ReadAllText(Path.Combine(dir!.FullName, "docs/historian/sqlserver/002_sample_modified.sql")).ShouldBe(text);
    }
}