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using System;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
using System.Threading;
using System.Timers;
using Timer = System.Timers.Timer;
using Nini.Config;
using NUnit.Framework;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Framework.Communications;
using OpenSim.Region.Framework.Scenes;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.ClientStack.Linden;
using OpenSim.Region.CoreModules.Framework.EntityTransfer;
using OpenSim.Region.CoreModules.World.Serialiser;
using OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation;
using OpenSim.Tests.Common;
using OpenSim.Tests.Common.Mock;
using GridRegion = OpenSim.Services.Interfaces.GridRegion;

namespace OpenSim.Region.Framework.Scenes.Tests
{
    /// <summary>
    /// Scene presence tests
    /// </summary>
    [TestFixture]
    public class ScenePresenceAgentTests : OpenSimTestCase
    {
//        public Scene scene, scene2, scene3;
//        public UUID agent1, agent2, agent3;
//        public static Random random;
//        public ulong region1, region2, region3;
//        public AgentCircuitData acd1;
//        public TestClient testclient;

//        [TestFixtureSetUp]
//        public void Init()
//        {
////            TestHelpers.InMethod();
////
////            SceneHelpers sh = new SceneHelpers();
////
////            scene = sh.SetupScene("Neighbour x", UUID.Random(), 1000, 1000);
////            scene2 = sh.SetupScene("Neighbour x+1", UUID.Random(), 1001, 1000);
////            scene3 = sh.SetupScene("Neighbour x-1", UUID.Random(), 999, 1000);
////
////            ISharedRegionModule interregionComms = new LocalSimulationConnectorModule();
////            interregionComms.Initialise(new IniConfigSource());
////            interregionComms.PostInitialise();
////            SceneHelpers.SetupSceneModules(scene, new IniConfigSource(), interregionComms);
////            SceneHelpers.SetupSceneModules(scene2, new IniConfigSource(), interregionComms);
////            SceneHelpers.SetupSceneModules(scene3, new IniConfigSource(), interregionComms);
//
////            agent1 = UUID.Random();
////            agent2 = UUID.Random();
////            agent3 = UUID.Random();
//
////            region1 = scene.RegionInfo.RegionHandle;
////            region2 = scene2.RegionInfo.RegionHandle;
////            region3 = scene3.RegionInfo.RegionHandle;
//        }

        [Test]
        public void TestCreateRootScenePresence()
        {
            TestHelpers.InMethod();
//            TestHelpers.EnableLogging();

            UUID spUuid = TestHelpers.ParseTail(0x1);

            TestScene scene = new SceneHelpers().SetupScene();
            SceneHelpers.AddScenePresence(scene, spUuid);

            Assert.That(scene.AuthenticateHandler.GetAgentCircuitData(spUuid), Is.Not.Null);
            Assert.That(scene.AuthenticateHandler.GetAgentCircuits().Count, Is.EqualTo(1));

            ScenePresence sp = scene.GetScenePresence(spUuid);
            Assert.That(sp, Is.Not.Null);
            Assert.That(sp.IsChildAgent, Is.False);
            Assert.That(sp.UUID, Is.EqualTo(spUuid));

            Assert.That(scene.GetScenePresences().Count, Is.EqualTo(1));
        }

        [Test]
        public void TestCreateDuplicateRootScenePresence()
        {
            TestHelpers.InMethod();
//            TestHelpers.EnableLogging();

            UUID spUuid = TestHelpers.ParseTail(0x1);

            TestScene scene = new SceneHelpers().SetupScene();
            SceneHelpers.AddScenePresence(scene, spUuid);
            SceneHelpers.AddScenePresence(scene, spUuid);

            Assert.That(scene.AuthenticateHandler.GetAgentCircuitData(spUuid), Is.Not.Null);
            Assert.That(scene.AuthenticateHandler.GetAgentCircuits().Count, Is.EqualTo(1));

            ScenePresence sp = scene.GetScenePresence(spUuid);
            Assert.That(sp, Is.Not.Null);
            Assert.That(sp.IsChildAgent, Is.False);
            Assert.That(sp.UUID, Is.EqualTo(spUuid));
        }

        [Test]
        public void TestCloseAgent()
        {
            TestHelpers.InMethod();
//            TestHelpers.EnableLogging();

            TestScene scene = new SceneHelpers().SetupScene();
            ScenePresence sp = SceneHelpers.AddScenePresence(scene, TestHelpers.ParseTail(0x1));

            scene.IncomingCloseAgent(sp.UUID, false);

            Assert.That(scene.GetScenePresence(sp.UUID), Is.Null);
            Assert.That(scene.AuthenticateHandler.GetAgentCircuitData(sp.UUID), Is.Null);
            Assert.That(scene.AuthenticateHandler.GetAgentCircuits().Count, Is.EqualTo(0));

//            TestHelpers.DisableLogging();
        }

        [Test]
        public void TestCreateChildScenePresence()
        {
            TestHelpers.InMethod();
//            log4net.Config.XmlConfigurator.Configure();

            LocalSimulationConnectorModule lsc = new LocalSimulationConnectorModule();

            IConfigSource configSource = new IniConfigSource();
            IConfig config = configSource.AddConfig("Modules");
            config.Set("SimulationServices", "LocalSimulationConnectorModule");

            SceneHelpers sceneHelpers = new SceneHelpers();
            TestScene scene = sceneHelpers.SetupScene();
            SceneHelpers.SetupSceneModules(scene, configSource, lsc);

            UUID agentId = TestHelpers.ParseTail(0x01);
            AgentCircuitData acd = SceneHelpers.GenerateAgentData(agentId);
            acd.child = true;

            GridRegion region = scene.GridService.GetRegionByName(UUID.Zero, scene.RegionInfo.RegionName);
            string reason;

            // *** This is the first stage, when a neighbouring region is told that a viewer is about to try and
            // establish a child scene presence.  We pass in the circuit code that the client has to connect with ***
            // XXX: ViaLogin may not be correct here.
            scene.SimulationService.CreateAgent(region, acd, (uint)TeleportFlags.ViaLogin, out reason);

            Assert.That(scene.AuthenticateHandler.GetAgentCircuitData(agentId), Is.Not.Null);
            Assert.That(scene.AuthenticateHandler.GetAgentCircuits().Count, Is.EqualTo(1));

            // There's no scene presence yet since only an agent circuit has been established.
            Assert.That(scene.GetScenePresence(agentId), Is.Null);

            // *** This is the second stage, where the client established a child agent/scene presence using the
            // circuit code given to the scene in stage 1 ***
            TestClient client = new TestClient(acd, scene);
            scene.AddNewClient(client, PresenceType.User);

            Assert.That(scene.AuthenticateHandler.GetAgentCircuitData(agentId), Is.Not.Null);
            Assert.That(scene.AuthenticateHandler.GetAgentCircuits().Count, Is.EqualTo(1));

            ScenePresence sp = scene.GetScenePresence(agentId);
            Assert.That(sp, Is.Not.Null);
            Assert.That(sp.UUID, Is.EqualTo(agentId));
            Assert.That(sp.IsChildAgent, Is.True);
        }

        /// <summary>
        /// Test that if a root agent logs into a region, a child agent is also established in the neighbouring region
        /// </summary>
        /// <remarks>
        /// Please note that unlike the other tests here, this doesn't rely on anything set up in the instance fields.
        /// INCOMPLETE
        /// </remarks>
        [Test]
        public void TestChildAgentEstablishedInNeighbour()
        {
            TestHelpers.InMethod();
//            log4net.Config.XmlConfigurator.Configure();
            
//            UUID agent1Id = UUID.Parse("00000000-0000-0000-0000-000000000001");
            
            TestScene myScene1 = new SceneHelpers().SetupScene("Neighbour y", UUID.Random(), 1000, 1000);
            TestScene myScene2 = new SceneHelpers().SetupScene("Neighbour y + 1", UUID.Random(), 1001, 1000);

            IConfigSource configSource = new IniConfigSource();
            IConfig config = configSource.AddConfig("Startup");
            config.Set("serverside_object_permissions", true);
            config.Set("EventQueue", true);

            EntityTransferModule etm = new EntityTransferModule();

            EventQueueGetModule eqgm1 = new EventQueueGetModule();
            SceneHelpers.SetupSceneModules(myScene1, configSource, etm, eqgm1);

            EventQueueGetModule eqgm2 = new EventQueueGetModule();
            SceneHelpers.SetupSceneModules(myScene2, configSource, etm, eqgm2);
            
//            SceneHelpers.AddScenePresence(myScene1, agent1Id);
//            ScenePresence childPresence = myScene2.GetScenePresence(agent1);
//
//            // TODO: Need to do a fair amount of work to allow synchronous establishment of child agents
//            Assert.That(childPresence, Is.Not.Null);
//            Assert.That(childPresence.IsChildAgent, Is.True);
        }

//        /// <summary>
//        /// Test adding a root agent to a scene.  Doesn't yet actually complete crossing the agent into the scene.
//        /// </summary>
//        [Test]
//        public void T010_TestAddRootAgent()
//        {
//            TestHelpers.InMethod();
//
//            string firstName = "testfirstname";
//
//            AgentCircuitData agent = new AgentCircuitData();
//            agent.AgentID = agent1;
//            agent.firstname = firstName;
//            agent.lastname = "testlastname";
//            agent.SessionID = UUID.Random();
//            agent.SecureSessionID = UUID.Random();
//            agent.circuitcode = 123;
//            agent.BaseFolder = UUID.Zero;
//            agent.InventoryFolder = UUID.Zero;
//            agent.startpos = Vector3.Zero;
//            agent.CapsPath = GetRandomCapsObjectPath();
//            agent.ChildrenCapSeeds = new Dictionary<ulong, string>();
//            agent.child = true;
//
//            scene.PresenceService.LoginAgent(agent.AgentID.ToString(), agent.SessionID, agent.SecureSessionID);
//
//            string reason;
//            scene.NewUserConnection(agent, (uint)TeleportFlags.ViaLogin, out reason);
//            testclient = new TestClient(agent, scene);
//            scene.AddNewClient(testclient);
//
//            ScenePresence presence = scene.GetScenePresence(agent1);
//
//            Assert.That(presence, Is.Not.Null, "presence is null");
//            Assert.That(presence.Firstname, Is.EqualTo(firstName), "First name not same");
//            acd1 = agent;
//        }
//
//        /// <summary>
//        /// Test removing an uncrossed root agent from a scene.
//        /// </summary>
//        [Test]
//        public void T011_TestRemoveRootAgent()
//        {
//            TestHelpers.InMethod();
//
//            scene.RemoveClient(agent1);
//
//            ScenePresence presence = scene.GetScenePresence(agent1);
//
//            Assert.That(presence, Is.Null, "presence is not null");
//        }

        // I'm commenting this test because it does not represent
        // crossings. The Thread.Sleep's in here are not meaningful mocks,
        // and they sometimes fail in panda.
        // We need to talk in order to develop a test
        // that really tests region crossings. There are 3 async components,
        // but things are synchronous among them. So there should be
        // 3 threads in here.
        //[Test]
//        public void T021_TestCrossToNewRegion()
//        {
//            TestHelpers.InMethod();
//
//            scene.RegisterRegionWithGrid();
//            scene2.RegisterRegionWithGrid();
//
//            // Adding child agent to region 1001
//            string reason;
//            scene2.NewUserConnection(acd1,0, out reason);
//            scene2.AddNewClient(testclient, PresenceType.User);
//
//            ScenePresence presence = scene.GetScenePresence(agent1);
//            presence.MakeRootAgent(new Vector3(0,unchecked(Constants.RegionSize-1),0), true);
//
//            ScenePresence presence2 = scene2.GetScenePresence(agent1);
//
//           // Adding neighbour region caps info to presence2
//
//            string cap = presence.ControllingClient.RequestClientInfo().CapsPath;
//            presence2.AddNeighbourRegion(region1, cap);
//
//            Assert.That(presence.IsChildAgent, Is.False, "Did not start root in origin region.");
//            Assert.That(presence2.IsChildAgent, Is.True, "Is not a child on destination region.");
//
//            // Cross to x+1
//            presence.AbsolutePosition = new Vector3(Constants.RegionSize+1,3,100);
//            presence.Update();
//
//            EventWaitHandle wh = new EventWaitHandle (false, EventResetMode.AutoReset, "Crossing");
//
//            // Mimicking communication between client and server, by waiting OK from client
//            // sent by TestClient.CrossRegion call. Originally, this is network comm.
//            if (!wh.WaitOne(5000,false))
//            {
//                presence.Update();
//                if (!wh.WaitOne(8000,false))
//                    throw new ArgumentException("1 - Timeout waiting for signal/variable.");
//            }
//
//            // This is a TestClient specific method that fires OnCompleteMovementToRegion event, which
//            // would normally be fired after receiving the reply packet from comm. done on the last line.
//            testclient.CompleteMovement();
//
//            // Crossings are asynchronous
//            int timer = 10;
//
//            // Make sure cross hasn't already finished
//            if (!presence.IsInTransit && !presence.IsChildAgent)
//            {
//                // If not and not in transit yet, give it some more time
//                Thread.Sleep(5000);
//            }
//
//            // Enough time, should at least be in transit by now.
//            while (presence.IsInTransit && timer > 0)
//            {
//                Thread.Sleep(1000);
//                timer-=1;
//            }
//
//            Assert.That(timer,Is.GreaterThan(0),"Timed out waiting to cross 2->1.");
//            Assert.That(presence.IsChildAgent, Is.True, "Did not complete region cross as expected.");
//            Assert.That(presence2.IsChildAgent, Is.False, "Did not receive root status after receiving agent.");
//
//            // Cross Back
//            presence2.AbsolutePosition = new Vector3(-10, 3, 100);
//            presence2.Update();
//
//            if (!wh.WaitOne(5000,false))
//            {
//                presence2.Update();
//                if (!wh.WaitOne(8000,false))
//                    throw new ArgumentException("2 - Timeout waiting for signal/variable.");
//            }
//            testclient.CompleteMovement();
//
//            if (!presence2.IsInTransit && !presence2.IsChildAgent)
//            {
//                // If not and not in transit yet, give it some more time
//                Thread.Sleep(5000);
//            }
//
//            // Enough time, should at least be in transit by now.
//            while (presence2.IsInTransit && timer > 0)
//            {
//                Thread.Sleep(1000);
//                timer-=1;
//            }
//
//            Assert.That(timer,Is.GreaterThan(0),"Timed out waiting to cross 1->2.");
//            Assert.That(presence2.IsChildAgent, Is.True, "Did not return from region as expected.");
//            Assert.That(presence.IsChildAgent, Is.False, "Presence was not made root in old region again.");
//        }
    }
}