using System.Linq;
using System.Reflection;
using CliFx.Attributes;
using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Driver.AbLegacy.Cli.Commands;

namespace ZB.MOM.WW.OtOpcUa.Driver.AbLegacy.Cli.Tests;

/// <summary>
///     Locks in the CLI command-option contract surface area — short aliases and
///     help-text wording — that the AbLegacy CLI is expected to keep in parity with
///     its sibling AbCip CLI and with <c>docs/Driver.AbLegacy.Cli.md</c>.
///     Regression coverage for findings Driver.AbLegacy.Cli-002, -005, -006.
/// </summary>
[Trait("Category", "Unit")]
public sealed class CommandMetadataTests
{
    private static CommandOptionAttribute GetOption<TCommand>(string propertyName)
    {
        var prop = typeof(TCommand).GetProperty(
            propertyName,
            BindingFlags.Public | BindingFlags.Instance);
        prop.ShouldNotBeNull($"property {propertyName} is missing from {typeof(TCommand).Name}");
        var attr = prop!.GetCustomAttribute<CommandOptionAttribute>();
        attr.ShouldNotBeNull(
            $"property {propertyName} on {typeof(TCommand).Name} lacks [CommandOption]");
        return attr!;
    }

    // ---------- Driver.AbLegacy.Cli-006 — ProbeCommand --type needs short alias 't' ----------

    [Fact]
    public void ProbeCommand_type_has_short_alias_t()
    {
        // Parity with read / write / subscribe: --type / -t works everywhere.
        var attr = GetOption<ProbeCommand>(nameof(ProbeCommand.DataType));
        attr.ShortName.ShouldBe('t');
    }

    [Theory]
    [InlineData(typeof(ReadCommand), nameof(ReadCommand.DataType))]
    [InlineData(typeof(WriteCommand), nameof(WriteCommand.DataType))]
    [InlineData(typeof(SubscribeCommand), nameof(SubscribeCommand.DataType))]
    public void Other_commands_keep_type_short_alias_t(System.Type commandType, string propName)
    {
        var prop = commandType.GetProperty(propName, BindingFlags.Public | BindingFlags.Instance);
        prop.ShouldNotBeNull();
        var attr = prop!.GetCustomAttribute<CommandOptionAttribute>();
        attr.ShouldNotBeNull();
        attr!.ShortName.ShouldBe('t');
    }

    // ---------- Driver.AbLegacy.Cli-002 — WriteCommand --value help lists full bool alias set ----------

    [Fact]
    public void WriteCommand_value_help_lists_full_boolean_alias_set()
    {
        // ParseBool accepts true/false, 1/0, on/off, yes/no — the help text must say so
        // (DriverClis.md documents the full alias set as the shared CLI contract).
        var attr = GetOption<WriteCommand>(nameof(WriteCommand.Value));
        attr.Description.ShouldNotBeNull();
        attr.Description!.ShouldContain("true/false", Case.Insensitive);
        attr.Description!.ShouldContain("1/0");
        attr.Description!.ShouldContain("on/off", Case.Insensitive);
        attr.Description!.ShouldContain("yes/no", Case.Insensitive);
    }

    // ---------- Driver.AbLegacy.Cli-005 — SubscribeCommand --interval-ms help notes 250ms floor ----------

    [Fact]
    public void SubscribeCommand_interval_ms_help_notes_PollGroupEngine_floor()
    {
        // Parity with AbCip CLI: operators passing -i 100 deserve a heads-up that
        // PollGroupEngine floors sub-250ms values.
        var attr = GetOption<SubscribeCommand>(nameof(SubscribeCommand.IntervalMs));
        attr.Description.ShouldNotBeNull();
        attr.Description!.ShouldContain("250", Case.Insensitive);
    }
}