// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.

using System.Collections.ObjectModel;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
using System.Web.Http.Services;
using Microsoft.TestCommon;
using Moq;

namespace System.Web.Http.Tracing.Tracers
{
    public class ActionFilterAttributeTracerTest
    {
        [Fact]
        public void Equals_Calls_Inner()
        {
            // Arrange
            object randomObject = new Object();
            Mock<ActionFilterAttribute> mockAttribute = new Mock<ActionFilterAttribute>();
            mockAttribute.Setup(a => a.Equals(randomObject)).Returns(true).Verifiable();
            ActionFilterAttributeTracer tracer = new ActionFilterAttributeTracer(mockAttribute.Object, new TestTraceWriter());

            // Act
            bool valueReturned = tracer.Equals(randomObject);

            // Assert
            Assert.True(valueReturned);
            mockAttribute.Verify();
        }

        [Fact]
        public void GetHashCode_Calls_Inner()
        {
            // Arrange
            Mock<ActionFilterAttribute> mockAttribute = new Mock<ActionFilterAttribute>();
            mockAttribute.Setup(a => a.GetHashCode()).Returns(1).Verifiable();
            ActionFilterAttributeTracer tracer = new ActionFilterAttributeTracer(mockAttribute.Object, new TestTraceWriter());

            // Act
            int valueReturned = tracer.GetHashCode();

            // Assert
            Assert.Equal(1, valueReturned);
            mockAttribute.Verify();
        }

        [Fact]
        public void IsDefaultAttribute_Calls_Inner()
        {
            // Arrange
            Mock<ActionFilterAttribute> mockAttribute = new Mock<ActionFilterAttribute>();
            mockAttribute.Setup(a => a.IsDefaultAttribute()).Returns(true).Verifiable();
            ActionFilterAttributeTracer tracer = new ActionFilterAttributeTracer(mockAttribute.Object, new TestTraceWriter());

            // Act
            bool valueReturned = tracer.IsDefaultAttribute();

            // Assert
            Assert.True(valueReturned);
            mockAttribute.Verify();
        }

        [Fact]
        public void Match_Calls_Inner()
        {
            // Arrange
            object randomObject = new Object();
            Mock<ActionFilterAttribute> mockAttribute = new Mock<ActionFilterAttribute>();
            mockAttribute.Setup(a => a.Match(randomObject)).Returns(true).Verifiable();
            ActionFilterAttributeTracer tracer = new ActionFilterAttributeTracer(mockAttribute.Object, new TestTraceWriter());

            // Act
            bool valueReturned = tracer.Match(randomObject);

            // Assert
            Assert.True(valueReturned);
            mockAttribute.Verify();
        }

        [Fact]
        public void TypeId_Calls_Inner()
        {
            // Arrange
            object randomObject = new Object();
            Mock<ActionFilterAttribute> mockAttribute = new Mock<ActionFilterAttribute>();
            mockAttribute.Setup(a => a.TypeId).Returns(randomObject).Verifiable();
            ActionFilterAttributeTracer tracer = new ActionFilterAttributeTracer(mockAttribute.Object, new TestTraceWriter());

            // Act
            object valueReturned = tracer.TypeId;

            // Assert
            Assert.Same(randomObject, valueReturned);
            mockAttribute.Verify();
        }

        [Fact]
        public void AllowMultiple_Calls_Inner()
        {
            // Arrange
            Mock<ActionFilterAttribute> mockAttribute = new Mock<ActionFilterAttribute>();
            mockAttribute.Setup(a => a.AllowMultiple).Returns(true).Verifiable();
            ActionFilterAttributeTracer tracer = new ActionFilterAttributeTracer(mockAttribute.Object, new TestTraceWriter());

            // Act
            bool valueReturned = tracer.AllowMultiple;

            // Assert
            Assert.True(valueReturned);
            mockAttribute.Verify();
        }

        [Fact]
        public void ExecuteActionFilterAsync_Traces_Executing_And_Executed()
        {
            // Arrange
            Mock<ActionFilterAttribute> mockAttr = new Mock<ActionFilterAttribute>() { CallBase = true };
            Mock<HttpActionDescriptor> mockActionDescriptor = new Mock<HttpActionDescriptor>() { CallBase = true };
            mockActionDescriptor.Setup(a => a.ActionName).Returns("test");
            mockActionDescriptor.Setup(a => a.GetParameters()).Returns(new Collection<HttpParameterDescriptor>(new HttpParameterDescriptor[0]));
            HttpActionContext actionContext = ContextUtil.CreateActionContext(actionDescriptor: mockActionDescriptor.Object);
            TestTraceWriter traceWriter = new TestTraceWriter();
            IActionFilter tracer = new ActionFilterAttributeTracer(mockAttr.Object, traceWriter) as IActionFilter;
            Func<Task<HttpResponseMessage>> continuation =
                () => Task.FromResult<HttpResponseMessage>(new HttpResponseMessage());
            TraceRecord[] expectedTraces = new TraceRecord[]
            {
                new TraceRecord(actionContext.Request, TraceCategories.FiltersCategory, TraceLevel.Info) { Kind = TraceKind.Begin, Operation = "OnActionExecutingAsync" },
                new TraceRecord(actionContext.Request, TraceCategories.FiltersCategory, TraceLevel.Info) { Kind = TraceKind.End,  Operation = "OnActionExecutingAsync" },
                new TraceRecord(actionContext.Request, TraceCategories.FiltersCategory, TraceLevel.Info) { Kind = TraceKind.Begin, Operation = "OnActionExecutedAsync" },
                new TraceRecord(actionContext.Request, TraceCategories.FiltersCategory, TraceLevel.Info) { Kind = TraceKind.End,  Operation = "OnActionExecutedAsync" }
            };

            // Act
            tracer.ExecuteActionFilterAsync(actionContext, CancellationToken.None, continuation).Wait();

            // Assert
            Assert.Equal<TraceRecord>(expectedTraces, traceWriter.Traces, new TraceRecordComparer());
        }

        [Fact]
        public void ExecuteActionFilterAsync_Faults_And_Traces_When_OnExecuting_Faults()
        {
            // Arrange
            Mock<ActionFilterAttribute> mockAttr = new Mock<ActionFilterAttribute>() { CallBase = true };
            InvalidOperationException exception = new InvalidOperationException("test");
            mockAttr.Setup(a => a.OnActionExecuting(It.IsAny<HttpActionContext>())).Throws(exception);
            Mock<HttpActionDescriptor> mockActionDescriptor = new Mock<HttpActionDescriptor>() { CallBase = true };
            mockActionDescriptor.Setup(a => a.ActionName).Returns("test");
            mockActionDescriptor.Setup(a => a.GetParameters()).Returns(new Collection<HttpParameterDescriptor>(new HttpParameterDescriptor[0]));
            HttpActionContext actionContext = ContextUtil.CreateActionContext(actionDescriptor: mockActionDescriptor.Object);
            TestTraceWriter traceWriter = new TestTraceWriter();
            IActionFilter tracer = new ActionFilterAttributeTracer(mockAttr.Object, traceWriter) as IActionFilter;
            Func<Task<HttpResponseMessage>> continuation =
                () => Task.FromResult<HttpResponseMessage>(new HttpResponseMessage());
            TraceRecord[] expectedTraces = new TraceRecord[]
            {
                new TraceRecord(actionContext.Request, TraceCategories.FiltersCategory, TraceLevel.Info) { Kind = TraceKind.Begin, Operation = "OnActionExecutingAsync" },
                new TraceRecord(actionContext.Request, TraceCategories.FiltersCategory, TraceLevel.Error) { Kind = TraceKind.End,  Operation = "OnActionExecutingAsync" }
            };

            // Act
            Task<HttpResponseMessage> task = tracer.ExecuteActionFilterAsync(actionContext, CancellationToken.None, continuation);

            // Assert
            Exception thrown = Assert.Throws<InvalidOperationException>(() => task.Wait());
            Assert.Same(exception, thrown);
            Assert.Same(exception, traceWriter.Traces[1].Exception);
            Assert.Equal<TraceRecord>(expectedTraces, traceWriter.Traces, new TraceRecordComparer());
        }

        [Fact]
        public void ExecuteActionFilterAsync_Faults_And_Traces_When_OnExecuted_Faults()
        {
            // Arrange
            Mock<ActionFilterAttribute> mockAttr = new Mock<ActionFilterAttribute>() { CallBase = true };
            InvalidOperationException exception = new InvalidOperationException("test");
            mockAttr.Setup(a => a.OnActionExecuted(It.IsAny<HttpActionExecutedContext>())).Throws(exception);
            Mock<HttpActionDescriptor> mockActionDescriptor = new Mock<HttpActionDescriptor>() { CallBase = true };
            mockActionDescriptor.Setup(a => a.ActionName).Returns("test");
            mockActionDescriptor.Setup(a => a.GetParameters()).Returns(new Collection<HttpParameterDescriptor>(new HttpParameterDescriptor[0]));
            HttpActionContext actionContext = ContextUtil.CreateActionContext(actionDescriptor: mockActionDescriptor.Object);
            TestTraceWriter traceWriter = new TestTraceWriter();
            IActionFilter tracer = new ActionFilterAttributeTracer(mockAttr.Object, traceWriter) as IActionFilter;

            Func<Task<HttpResponseMessage>> continuation =
                () => Task.FromResult<HttpResponseMessage>(new HttpResponseMessage());
            TraceRecord[] expectedTraces = new TraceRecord[]
            {
                new TraceRecord(actionContext.Request, TraceCategories.FiltersCategory, TraceLevel.Info) { Kind = TraceKind.Begin, Operation = "OnActionExecutingAsync" },
                new TraceRecord(actionContext.Request, TraceCategories.FiltersCategory, TraceLevel.Info) { Kind = TraceKind.End,  Operation = "OnActionExecutingAsync" },
                new TraceRecord(actionContext.Request, TraceCategories.FiltersCategory, TraceLevel.Info) { Kind = TraceKind.Begin, Operation = "OnActionExecutedAsync" },
                new TraceRecord(actionContext.Request, TraceCategories.FiltersCategory, TraceLevel.Error) { Kind = TraceKind.End,  Operation = "OnActionExecutedAsync" }
            };

            // Act
            Task<HttpResponseMessage> task = tracer.ExecuteActionFilterAsync(actionContext, CancellationToken.None, continuation);

            // Assert
            Exception thrown = Assert.Throws<InvalidOperationException>(() => task.Wait());
            Assert.Same(exception, thrown);
            Assert.Same(exception, traceWriter.Traces[3].Exception);
            Assert.Equal<TraceRecord>(expectedTraces, traceWriter.Traces, new TraceRecordComparer());
        }

        [Fact]
        public void Inner_Property_On_ActionFilterAttributeTracer_Returns_ActionFilterAttribute()
        {
            // Arrange
            ActionFilterAttribute expectedInner = new Mock<ActionFilterAttribute>().Object;
            ActionFilterAttributeTracer productUnderTest = new ActionFilterAttributeTracer(expectedInner, new TestTraceWriter());

            // Act
            ActionFilterAttribute actualInner = productUnderTest.Inner;

            // Assert
            Assert.Same(expectedInner, actualInner);
        }

        [Fact]
        public void Decorator_GetInner_On_ActionFilterAttributeTracer_Returns_ActionFilterAttribute()
        {
            // Arrange
            ActionFilterAttribute expectedInner = new Mock<ActionFilterAttribute>().Object;
            ActionFilterAttributeTracer productUnderTest = new ActionFilterAttributeTracer(expectedInner, new TestTraceWriter());

            // Act
            ActionFilterAttribute actualInner = Decorator.GetInner(productUnderTest as ActionFilterAttribute);

            // Assert
            Assert.Same(expectedInner, actualInner);
        }
    }
}
