// Copyright (c) Six Labors.
// Licensed under the Six Labors Split License.

using System.Reflection;

namespace SixLabors.ImageSharp.Tests;

/// <summary>
/// Triggers passing <see cref="TestImageProvider{TPixel}"/> instances which return the image produced by the given test class member method
/// <see cref="TestImageProvider{TPixel}"/> instances will be passed for each the pixel format defined by the pixelTypes parameter.
/// The parameter of the factory method must be a <see cref="GenericFactory{TPixel}"/> instance.
/// </summary>
public class WithMemberFactoryAttribute : ImageDataAttributeBase
{
    private readonly string memberMethodName;

    /// <summary>
    /// Triggers passing <see cref="TestImageProvider{TPixel}"/> instances which return the image produced by the given test class member method
    /// <see cref="TestImageProvider{TPixel}"/> instances will be passed for each the pixel format defined by the pixelTypes parameter.
    /// </summary>
    /// <param name="memberMethodName">The name of the static test class which returns the image.</param>
    /// <param name="pixelTypes">The requested pixel types.</param>
    /// <param name="additionalParameters">Additional theory parameter values.</param>
    public WithMemberFactoryAttribute(string memberMethodName, PixelTypes pixelTypes, params object[] additionalParameters)
        : base(null, pixelTypes, additionalParameters)
    {
        this.memberMethodName = memberMethodName;
    }

    protected override object[] GetFactoryMethodArgs(MethodInfo testMethod, Type factoryType)
    {
        return [testMethod.DeclaringType.FullName, this.memberMethodName];
    }

    protected override string GetFactoryMethodName(MethodInfo testMethod) => "Lambda";
}