//Copyright (c) Microsoft Corporation.  All rights reserved.



using System;

using System.Text;

using System.Collections.Generic;

using Microsoft.VisualStudio.TestTools.UnitTesting;



namespace Eas.WebCrawler.Test.Scenario {

    /// <summary>

    /// Summary description for InvalidRequestTests

    /// </summary>

    [TestClass]

    public class InvalidRequestTests {

        public InvalidRequestTests() {

            //

            // TODO: Add constructor logic here

            //

        }



        #region Additional test attributes

        //

        // You can use the following additional attributes as you write your tests:

        //

        // Use ClassInitialize to run code before running the first test in the class

        // [ClassInitialize()]

        // public static void MyClassInitialize(TestContext testContext) { }

        //

        // Use ClassCleanup to run code after all tests in a class have run

        // [ClassCleanup()]

        // public static void MyClassCleanup() { }

        //



        NMock2.Mockery _Mockery = null;

        Eas.WebCrawler.Common.Test.TestDirectory _Directory = null;

        TestEventHandler _Handler = null;

        Dictionary<Uri, object> _ExpectedUris = null;



        // Use TestInitialize to run code before running each test 

        [TestInitialize()]

        public void MyTestInitialize() {

            _ExpectedUris = new Dictionary<Uri, object>();

            TestGateway.Clear();

            LogErrorAction.errors.Clear();

            LogTraceAction.traces.Clear();

            LogWebFailureAction.failures.Clear();

            _Mockery = new NMock2.Mockery();

            _Directory = new Eas.WebCrawler.Common.Test.TestDirectory(this.GetType().Name, "Resources");

            _Handler = _Mockery.NewMock<TestEventHandler>();

        }



        //

        // Use TestCleanup to run code after each test has run

        [TestCleanup()]

        public void MyTestCleanup() {

            Assert.AreEqual<int>(0, _ExpectedUris.Count);

            _Directory.Dispose();

            _Directory = null;

            _Handler = null;

            _Mockery.VerifyAllExpectationsHaveBeenMet();

            _Mockery.Dispose();

            _Mockery = null;

        }



        //

        #endregion





        [TestMethod]

        /// <summary>Executes the AnotherFailOnBegin test.</summary>

        public void AnotherFailOnBegin() {

            string[] startingUris = new string[] { "test.html" };

            string[] processedUris = new string[] { "test.html" };

            string[] historyFiles = new string[] { };

            int workerCount = 1;

            int errorCount = 0;

            int webFailureCount = 1;



            LoadHistoryFiles(historyFiles, _Directory);

            string[] initialUriList = CreateUriList(startingUris, _Directory);

            using (Eas.WebCrawler.Interfaces.WebCrawlerEngine engine = TestHelper.CreateEngine(new TestGateway(), _Handler, _Directory, workerCount, -1, initialUriList)) {

                NMock2.IAction failOnBeginAction = new SetFailOnBeginAction(engine);



                Eas.WebCrawler.Common.Threading.EventHandlerCompletionEvent waitEvent = PrepareEngine(_Handler, engine);

                ExpectProcessedUris(processedUris, failOnBeginAction, _Handler, _Directory, engine);

                RunEngine(engine, waitEvent);

                CheckErrors(errorCount, webFailureCount);

            }

        }



        [TestMethod]

        /// <summary>Executes the FailBeginAction test.</summary>

        public void FailBeginAction() {

            TestGateway._ThrowFor = ThrowFor.BeginGetResponse;

            string[] startingUris = new string[] { "test.html" };

            string[] processedUris = new string[] { };

            string[] historyFiles = new string[] { };

            int workerCount = 1;

            int errorCount = 0;

            int webFailureCount = 1;

            PerformTest(startingUris, processedUris, historyFiles, workerCount, errorCount, webFailureCount, null);

        }





        [TestMethod]

        /// <summary>Executes the TestFailedStart test.</summary>

        public void TestFailedStart() {

            string[] startingUris = new string[] { "test.html" };

            string[] processedUris = new string[] { "test.html", "nolinks.html" };

            string[] historyFiles = new string[] { };

            int workerCount = 1;

            int errorCount = 1;

            int webFailureCount = 0;



            LoadHistoryFiles(historyFiles, _Directory);

            string[] initialUriList = CreateUriList(startingUris, _Directory);

            using (Eas.WebCrawler.Interfaces.WebCrawlerEngine engine = TestHelper.CreateEngine(new TestGateway(), _Handler, _Directory, workerCount, -1, initialUriList)) {

                NMock2.IAction startAction = new StartAction(engine);



                Eas.WebCrawler.Common.Threading.EventHandlerCompletionEvent waitEvent = PrepareEngine(_Handler, engine);

                ExpectProcessedUris(processedUris, startAction, _Handler, _Directory, engine);

                RunEngine(engine, waitEvent);

                CheckErrors(errorCount, webFailureCount);

            }

        }



        [ExpectedException(typeof(System.InvalidOperationException))]

        [TestMethod]

        /// <summary>Executes the TestFailedStop test.</summary>

        public void TestFailedStop() {

            string[] startingUris = new string[] { "test.html" };

            string[] processedUris = new string[] { "test.html" };

            string[] historyFiles = new string[] { };

            int workerCount = 1;

            int errorCount = 0;

            int webFailureCount = 0;



            LoadHistoryFiles(historyFiles, _Directory);

            string[] initialUriList = CreateUriList(startingUris, _Directory);

            using (Eas.WebCrawler.Interfaces.WebCrawlerEngine engine = TestHelper.CreateEngine(new TestGateway(), _Handler, _Directory, workerCount, -1, initialUriList)) {

                NMock2.IAction stopAction = new StopAction(engine);



                Eas.WebCrawler.Common.Threading.EventHandlerCompletionEvent waitEvent = PrepareEngine(_Handler, engine);

                ExpectProcessedUris(processedUris, stopAction, _Handler, _Directory, engine);

                RunEngine(engine, waitEvent);

                engine.Stop();

                CheckErrors(errorCount, webFailureCount);

            }

        }





        [ExpectedException(typeof(System.InvalidOperationException))]

        [TestMethod]

        /// <summary>Executes the TestFailedPause test.</summary>

        public void TestFailedPause() {

            string[] startingUris = new string[] { "test.html" };

            string[] processedUris = new string[] { "test.html" };

            string[] historyFiles = new string[] { };

            int workerCount = 1;



            LoadHistoryFiles(historyFiles, _Directory);

            string[] initialUriList = CreateUriList(startingUris, _Directory);

            using (Eas.WebCrawler.Interfaces.WebCrawlerEngine engine = TestHelper.CreateEngine(new TestGateway(), _Handler, _Directory, workerCount, -1, initialUriList)) {

                engine.Pause();

            }

        }



        void PerformTest(string[] startingUris, string[] processedUris, string[] historyFiles, int workerCount, int errorCount, int webFailureCount, NMock2.IAction processedAction) {

            LoadHistoryFiles(historyFiles, _Directory);

            string[] initialUriList = CreateUriList(startingUris, _Directory);

            using (Eas.WebCrawler.Interfaces.WebCrawlerEngine engine = TestHelper.CreateEngine(new TestGateway(), _Handler, _Directory, workerCount, -1, initialUriList)) {

                Eas.WebCrawler.Common.Threading.EventHandlerCompletionEvent waitEvent = PrepareEngine(_Handler, engine);

                ExpectProcessedUris(processedUris, processedAction, _Handler, _Directory, engine);

                RunEngine(engine, waitEvent);

                CheckErrors(errorCount, webFailureCount);

            }

        }



        private void CheckErrors(int errorCount, int webFailureCount) {

            Assert.AreEqual<int>(errorCount, LogErrorAction.errors.Count);

            Assert.AreEqual<int>(webFailureCount, LogWebFailureAction.failures.Count);

        }



        private void RunEngine(Eas.WebCrawler.Interfaces.WebCrawlerEngine engine, Eas.WebCrawler.Common.Threading.EventHandlerCompletionEvent waitEvent) {

            try {

                engine.Start();

                waitEvent.WaitOne();

            }

            catch (System.Exception ex) {

                Console.WriteLine(ex.ToString());

            }

        }



        private void ExpectProcessedUris(string[] processedUris, NMock2.IAction processedAction, TestEventHandler handler, Eas.WebCrawler.Common.Test.TestDirectory directory, Eas.WebCrawler.Interfaces.WebCrawlerEngine engine) {

            UriProcessedCheckAction action = new UriProcessedCheckAction(_ExpectedUris);

            foreach (string uri in CreateUriList(processedUris, _Directory)) {

                _ExpectedUris.Add(new Uri(uri), null);

                if (processedAction == null) {

                    NMock2.Expect.Once.On(_Handler).Method("UrlProcessed").WithAnyArguments().Will(action);

                }

                else {

                    NMock2.Expect.Once.On(_Handler).Method("UrlProcessed").WithAnyArguments().Will(action, processedAction);

                }

            }

            Assert.AreEqual<int>(processedUris.Length, _ExpectedUris.Count);

        }



        private Eas.WebCrawler.Common.Threading.EventHandlerCompletionEvent PrepareEngine(TestEventHandler handler, Eas.WebCrawler.Interfaces.WebCrawlerEngine engine) {

            Eas.WebCrawler.Common.Threading.EventHandlerCompletionEvent waitEvent = new Eas.WebCrawler.Common.Threading.EventHandlerCompletionEvent();

            engine.Events.Stopped += waitEvent.CreateEventHandler();

            engine.Events.TraceLevel = Eas.WebCrawler.Interfaces.TraceLevel.Detailed;

            LogErrorAction.errors.Clear();

            NMock2.Expect.AtLeast(0).On(handler).Method("Error").WithAnyArguments().Will(new LogErrorAction());

            NMock2.Expect.AtLeast(0).On(handler).Method("Trace").WithAnyArguments().Will(new LogTraceAction());

            NMock2.Expect.AtLeast(0).On(handler).Method("UrlFailed").WithAnyArguments().Will(new LogWebFailureAction());

            NMock2.Expect.Once.On(handler).Method("BeforeStart").WithAnyArguments();

            NMock2.Expect.Once.On(handler).Method("AfterStop").WithAnyArguments();

            NMock2.Expect.AtLeast(0).On(handler).Method("UrlProcessingBegan").WithAnyArguments();





            return waitEvent;

        }



        private void LoadHistoryFiles(string[] historyFiles, Eas.WebCrawler.Common.Test.TestDirectory directory) {

            if (historyFiles != null) {

                foreach (string file in historyFiles) {

                    TestHelper.AddToHistoryFile(directory, file);

                }

            }

        }



        private string[] CreateUriList(string[] startingUris, Eas.WebCrawler.Common.Test.TestDirectory directory) {

            string[] initialUriList = new string[startingUris.Length];



            for (int i = 0; i < startingUris.Length; i++) {

                initialUriList[i] = "file://" + directory.CreateFileName(startingUris[i]);

            }

            return initialUriList;

        }

    }//

}