using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using Chernobyl.Reflection;
using NUnit.Framework;

namespace Chernobyl.Attribution
{
    /// <summary>
    /// Tests for the <see cref="ProcessMethodsAttributeTests"/> type.
    /// </summary>
    [TestFixture]
    public class ProcessMethodsAttributeTests : ProcessAttributesTests<Type, MethodInfo>
    {
        protected override Test CreateTest()
        {
            Type testClassType = typeof(TestClass);
            ProcessMethodsAttribute attribute =
                testClassType.GetCustomAttributes<ProcessMethodsAttribute>(true).First();

            return new Test(attribute, testClassType,
                            new List<MethodInfo>(testClassType.GetMethods(BindingFlags.Instance |
                                                                          BindingFlags.Static |
                                                                          BindingFlags.Public |
                                                                          BindingFlags.DeclaredOnly)),
                            TestProcessMethodAttribute.MethodsProcessed);
        }
    }

    /// <summary>
    /// Helper type that is used to test <see cref="ProcessMethodsAttribute"/> and
    /// related types.
    /// </summary>
    [AttributeUsage(AttributeTargets.Method)]
    public class TestProcessMethodAttribute : Attribute, IProcessAttribute<MethodInfo>
    {
        static TestProcessMethodAttribute()
        {
            MethodsProcessed = new List<MethodInfo>();
        }

        public void Process(MethodInfo attributeProvider)
        {
            MethodsProcessed.Add(attributeProvider);
        }

        public static ICollection<MethodInfo> MethodsProcessed { get; private set; }
    }

    [ProcessMethods]
    public class TestClass
    {
        [TestProcessMethod]
        public void Method1()
        {}

        [TestProcessMethod]
        public void Method2()
        {}
    }
}