using ZB.MOM.WW.ScadaBridge.CLI;
using ZB.MOM.WW.ScadaBridge.CLI.Commands;

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

/// <summary>
/// Regression tests for the exit-code contract: the design doc defines exit code 2 as "authorization
/// failure". The previous implementation keyed exit 2 solely off HTTP 403, so an
/// authorization failure the server signalled with an error <c>code</c> of
/// <c>UNAUTHORIZED</c>/<c>FORBIDDEN</c> but a different HTTP status was misreported as a
/// generic error (exit 1). Exit code 2 now keys off either signal.
/// </summary>
[Collection("Console")]
public class ExitCodeTests
{
    private static int HandleQuietly(ManagementResponse response)
    {
        var errWriter = new StringWriter();
        Console.SetError(errWriter);
        try
        {
            return CommandHelpers.HandleResponse(response, "json");
        }
        finally
        {
            Console.SetError(new StreamWriter(Console.OpenStandardError()) { AutoFlush = true });
        }
    }

    /// <summary>Verifies that an HTTP 403 response returns exit code 2.</summary>
    [Fact]
    public void HandleResponse_Http403_ReturnsTwo()
    {
        Assert.Equal(2, HandleQuietly(new ManagementResponse(403, null, "Forbidden", "FORBIDDEN")));
    }

    /// <summary>Verifies that an authorization error code with a status other than 403 still returns exit code 2.</summary>
    /// <param name="code">The error code returned by the server.</param>
    [Theory]
    [InlineData("UNAUTHORIZED")]
    [InlineData("FORBIDDEN")]
    [InlineData("unauthorized")]
    public void HandleResponse_AuthorizationCode_NonForbiddenStatus_ReturnsTwo(string code)
    {
        // The server signalled an authorization failure via the error code but with a
        // HTTP status other than 403 status; per the documented exit-code table this is still exit 2.
        Assert.Equal(2, HandleQuietly(new ManagementResponse(400, null, "Access denied", code)));
    }

    /// <summary>Verifies that a generic error returns exit code 1.</summary>
    [Fact]
    public void HandleResponse_GenericError_ReturnsOne()
    {
        Assert.Equal(1, HandleQuietly(new ManagementResponse(400, null, "Validation failed", "INVALID_ARGUMENT")));
    }

    /// <summary>Verifies that an authentication failure returns exit code 1.</summary>
    [Fact]
    public void HandleResponse_AuthenticationFailure_ReturnsOne()
    {
        // Authentication failure (bad credentials) is exit 1, distinct from authorization.
        Assert.Equal(1, HandleQuietly(new ManagementResponse(401, null, "Invalid credentials", "AUTH_FAILED")));
    }
}