using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.AdminUI.ScriptAnalysis;

namespace ZB.MOM.WW.OtOpcUa.AdminUI.Tests.ScriptAnalysis;

public sealed class CompletionTests
{
    private static readonly ScriptAnalysisService Svc = new();
    private static async Task<IReadOnlyList<CompletionItem>> Complete(string code, int line, int col)
        => (await Svc.CompleteAsync(new CompletionsRequest(code, line, col))).Items;

    [Fact] public async Task Dot_after_ctx_offers_context_members()
    {
        // caret immediately after "ctx." — column is 1-based; "ctx." is 4 chars so col 5 is just past the dot.
        var labels = (await Complete("ctx.", 1, 5)).Select(i => i.Label).ToList();
        labels.ShouldContain("GetTag");
        labels.ShouldContain("SetVirtualTag");
        labels.ShouldContain("Now");
        labels.ShouldContain("Logger");
    }

    [Fact] public async Task Scope_completion_includes_the_ctx_local()
    {
        // a partial identifier on its own line; scope completion should surface the `ctx` local.
        var labels = (await Complete("var x = c", 1, 10)).Select(i => i.Label).ToList();
        labels.ShouldContain("ctx");
    }
}