using Microsoft.Extensions.Options;

namespace ZB.MOM.WW.ScadaBridge.ManagementService.Tests;

/// <summary>
/// Arch-review 08 §1.5: <see cref="ManagementServiceOptions"/> supplies the Ask timeouts
/// the ManagementActor client uses for command and long-running transport/deploy calls. A
/// zero/negative timeout makes every command fail (or Ask forever); reject it fast at startup
/// with a key-naming message. <see cref="ManagementServiceOptions.SecuredWritePendingTtl"/> is
/// deliberately NOT required positive — a non-positive value legitimately disables server-side
/// secured-write expiry.
/// </summary>
public class ManagementServiceOptionsValidatorTests
{
    private static ValidateOptionsResult Validate(ManagementServiceOptions options) =>
        new ManagementServiceOptionsValidator().Validate(Options.DefaultName, options);

    /// <summary>Verifies that the long-running command timeout must leave a grace margin for the response.</summary>
    /// <param name="seconds">The long-running command timeout, in seconds.</param>
    [Theory]
    [InlineData(1)]
    [InlineData(5)]
    public void LongRunningTimeoutMustLeaveResponseGrace(int seconds)
    {
        Assert.True(Validate(new ManagementServiceOptions { LongRunningCommandTimeout = TimeSpan.FromSeconds(seconds) }).Failed);
    }

    /// <summary>Verifies that the default options are valid.</summary>
    [Fact]
    public void DefaultOptions_AreValid()
    {
        var result = Validate(new ManagementServiceOptions());
        Assert.True(result.Succeeded, result.FailureMessage);
    }

    /// <summary>Verifies that a non-positive secured-write pending TTL is valid.</summary>
    [Fact]
    public void NonPositiveSecuredWritePendingTtl_IsValid()
    {
        // A non-positive TTL disables server-side expiry by design — not a config error.
        var result = Validate(new ManagementServiceOptions { SecuredWritePendingTtl = TimeSpan.Zero });
        Assert.True(result.Succeeded, result.FailureMessage);
    }

    /// <summary>Verifies that a zero command timeout is rejected.</summary>
    [Fact]
    public void ZeroCommandTimeout_IsRejected()
    {
        var result = Validate(new ManagementServiceOptions { CommandTimeout = TimeSpan.Zero });

        Assert.True(result.Failed);
        Assert.Contains("CommandTimeout", result.FailureMessage);
    }

    /// <summary>Verifies that a negative command timeout is rejected.</summary>
    [Fact]
    public void NegativeCommandTimeout_IsRejected()
    {
        var result = Validate(new ManagementServiceOptions { CommandTimeout = TimeSpan.FromSeconds(-1) });

        Assert.True(result.Failed);
        Assert.Contains("CommandTimeout", result.FailureMessage);
    }

    /// <summary>Verifies that a zero long-running command timeout is rejected.</summary>
    [Fact]
    public void ZeroLongRunningCommandTimeout_IsRejected()
    {
        var result = Validate(new ManagementServiceOptions { LongRunningCommandTimeout = TimeSpan.Zero });

        Assert.True(result.Failed);
        Assert.Contains("LongRunningCommandTimeout", result.FailureMessage);
    }
}