using System.CommandLine;
using ScadaLink.CLI.Commands;

namespace ScadaLink.CLI.Tests.Commands;

/// <summary>
/// Scaffold tests for the <c>scadalink audit</c> command group (Audit Log #23 M8-T1).
/// Verifies the parent command exists with its three subcommands and that every leaf
/// has an action wired.
/// </summary>
public class AuditCommandsScaffoldTests
{
    private static readonly Option<string> Url = new("--url") { Recursive = true };
    private static readonly Option<string> Username = new("--username") { Recursive = true };
    private static readonly Option<string> Password = new("--password") { Recursive = true };
    private static readonly Option<string> Format = CliOptions.CreateFormatOption();

    private static Command BuildAudit()
        => AuditCommands.Build(Url, Format, Username, Password);

    [Fact]
    public void Audit_Command_IsNamedAudit()
    {
        var audit = BuildAudit();
        Assert.Equal("audit", audit.Name);
        Assert.False(string.IsNullOrWhiteSpace(audit.Description));
    }

    [Fact]
    public void Audit_HasThreeSubcommands_QueryExportVerifyChain()
    {
        var audit = BuildAudit();
        var names = audit.Subcommands.Select(c => c.Name).OrderBy(n => n).ToArray();
        Assert.Equal(new[] { "export", "query", "verify-chain" }, names);
    }

    [Fact]
    public void Audit_HelpText_ListsAllSubcommands()
    {
        var root = new RootCommand();
        root.Add(BuildAudit());

        var output = new StringWriter();
        var exit = root.Parse(new[] { "audit", "--help" })
            .Invoke(new InvocationConfiguration { Output = output });

        Assert.Equal(0, exit);
        var text = output.ToString();
        Assert.Contains("query", text);
        Assert.Contains("export", text);
        Assert.Contains("verify-chain", text);
    }

    [Fact]
    public void Audit_EveryLeafCommand_HasAnAction()
    {
        var audit = BuildAudit();
        Assert.All(audit.Subcommands, sub =>
            Assert.True(sub.Action != null, $"Leaf command '{sub.Name}' has no action."));
    }
}