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using System;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
using log4net;
using Nini.Config;
using NUnit.Framework;
using OpenMetaverse;
using OpenMetaverse.Assets;
using OpenMetaverse.StructuredData;
using OpenSim.Framework;
using OpenSim.Region.CoreModules.Avatar.AvatarFactory;
using OpenSim.Region.OptionalModules.World.NPC;
using OpenSim.Region.Framework.Scenes;
using OpenSim.Region.ScriptEngine.Shared;
using OpenSim.Region.ScriptEngine.Shared.Api;
using OpenSim.Region.ScriptEngine.Shared.Instance;
using OpenSim.Services.Interfaces;
using OpenSim.Tests.Common;
using PermissionMask = OpenSim.Framework.PermissionMask;

namespace OpenSim.Region.ScriptEngine.Shared.Tests
{
    /// <summary>
    /// Tests for inventory functions in LSL
    /// </summary>
    [TestFixture]
    public class LSL_ApiInventoryTests : OpenSimTestCase
    {
        protected Scene m_scene;
        protected XEngine.XEngine m_engine;

        [SetUp]
        public override void SetUp()
        {
            base.SetUp();

            IConfigSource initConfigSource = new IniConfigSource();
            IConfig config = initConfigSource.AddConfig("XEngine");
            config.Set("Enabled", "true");

            m_scene = new SceneHelpers().SetupScene();
            SceneHelpers.SetupSceneModules(m_scene, initConfigSource);

            m_engine = new XEngine.XEngine();
            m_engine.Initialise(initConfigSource);
            m_engine.AddRegion(m_scene);
        }

        /// <summary>
        /// Test giving inventory from an object to an object where both are owned by the same user.
        /// </summary>
        [Test]
        public void TestLlGiveInventoryO2OSameOwner()
        {
            TestHelpers.InMethod();
//            log4net.Config.XmlConfigurator.Configure();

            UUID userId = TestHelpers.ParseTail(0x1);
            string inventoryItemName = "item1";

            SceneObjectGroup so1 = SceneHelpers.CreateSceneObject(1, userId, "so1", 0x10);
            m_scene.AddSceneObject(so1);

            // Create an object embedded inside the first
            UUID itemId = TestHelpers.ParseTail(0x20);
            TaskInventoryHelpers.AddSceneObject(m_scene.AssetService, so1.RootPart, inventoryItemName, itemId, userId);

            LSL_Api api = new LSL_Api();
            api.Initialize(m_engine, so1.RootPart, null, null, null);

            // Create a second object
            SceneObjectGroup so2 = SceneHelpers.CreateSceneObject(1, userId, "so2", 0x100);
            m_scene.AddSceneObject(so2);

            api.llGiveInventory(so2.UUID.ToString(), inventoryItemName);

            // Item has copy permissions so original should stay intact.
            List<TaskInventoryItem> originalItems = so1.RootPart.Inventory.GetInventoryItems();
            Assert.That(originalItems.Count, Is.EqualTo(1));

            List<TaskInventoryItem> copiedItems = so2.RootPart.Inventory.GetInventoryItems(inventoryItemName);
            Assert.That(copiedItems.Count, Is.EqualTo(1));
            Assert.That(copiedItems[0].Name, Is.EqualTo(inventoryItemName));
        }

        /// <summary>
        /// Test giving inventory from an object to an object where they have different owners
        /// </summary>
        [Test]
        public void TestLlGiveInventoryO2ODifferentOwners()
        {
            TestHelpers.InMethod();
//            log4net.Config.XmlConfigurator.Configure();

            UUID user1Id = TestHelpers.ParseTail(0x1);
            UUID user2Id = TestHelpers.ParseTail(0x2);
            string inventoryItemName = "item1";

            SceneObjectGroup so1 = SceneHelpers.CreateSceneObject(1, user1Id, "so1", 0x10);
            m_scene.AddSceneObject(so1);
            LSL_Api api = new LSL_Api();
            api.Initialize(m_engine, so1.RootPart, null, null, null);

            // Create an object embedded inside the first
            UUID itemId = TestHelpers.ParseTail(0x20);
            TaskInventoryHelpers.AddSceneObject(m_scene.AssetService, so1.RootPart, inventoryItemName, itemId, user1Id);

            // Create a second object
            SceneObjectGroup so2 = SceneHelpers.CreateSceneObject(1, user2Id, "so2", 0x100);
            m_scene.AddSceneObject(so2);
            LSL_Api api2 = new LSL_Api();
            api2.Initialize(m_engine, so2.RootPart, null, null, null);

            // *** Firstly, we test where llAllowInventoryDrop() has not been called. ***
            api.llGiveInventory(so2.UUID.ToString(), inventoryItemName);

            {
                // Item has copy permissions so original should stay intact.
                List<TaskInventoryItem> originalItems = so1.RootPart.Inventory.GetInventoryItems();
                Assert.That(originalItems.Count, Is.EqualTo(1));

                // Should have not copied
                List<TaskInventoryItem> copiedItems = so2.RootPart.Inventory.GetInventoryItems(inventoryItemName);
                Assert.That(copiedItems.Count, Is.EqualTo(0));
            }

            // *** Secondly, we turn on allow inventory drop in the target and retest. ***
            api2.llAllowInventoryDrop(1);
            api.llGiveInventory(so2.UUID.ToString(), inventoryItemName);

            {
                // Item has copy permissions so original should stay intact.
                List<TaskInventoryItem> originalItems = so1.RootPart.Inventory.GetInventoryItems();
                Assert.That(originalItems.Count, Is.EqualTo(1));
    
                // Should now have copied.
                List<TaskInventoryItem> copiedItems = so2.RootPart.Inventory.GetInventoryItems(inventoryItemName);
                Assert.That(copiedItems.Count, Is.EqualTo(1));
                Assert.That(copiedItems[0].Name, Is.EqualTo(inventoryItemName));
            }
        }

        /// <summary>
        /// Test giving inventory from an object to an avatar that is not the object's owner.
        /// </summary>
        [Test]
        public void TestLlGiveInventoryO2DifferentAvatar()
        {
            TestHelpers.InMethod();
            //            TestHelpers.EnableLogging();

            UUID user1Id = TestHelpers.ParseTail(0x1);
            UUID user2Id = TestHelpers.ParseTail(0x2);
            string inventoryItemName = "item1";

            SceneObjectGroup so1 = SceneHelpers.CreateSceneObject(1, user1Id, "so1", 0x10);
            m_scene.AddSceneObject(so1);
            LSL_Api api = new LSL_Api();
            api.Initialize(m_engine, so1.RootPart, null, null, null);

            // Create an object embedded inside the first
            UUID itemId = TestHelpers.ParseTail(0x20);
            TaskInventoryHelpers.AddSceneObject(m_scene.AssetService, so1.RootPart, inventoryItemName, itemId, user1Id);

            UserAccountHelpers.CreateUserWithInventory(m_scene, user2Id);

            api.llGiveInventory(user2Id.ToString(), inventoryItemName);

            InventoryItemBase receivedItem 
                = UserInventoryHelpers.GetInventoryItem(
                    m_scene.InventoryService, user2Id, string.Format("Objects/{0}", inventoryItemName));

            Assert.IsNotNull(receivedItem);
        }

        /// <summary>
        /// Test giving inventory from an object to an avatar that is not the object's owner and where the next
        /// permissions do not include mod.
        /// </summary>
        [Test]
        public void TestLlGiveInventoryO2DifferentAvatarNoMod()
        {
            TestHelpers.InMethod();
//            TestHelpers.EnableLogging();

            UUID user1Id = TestHelpers.ParseTail(0x1);
            UUID user2Id = TestHelpers.ParseTail(0x2);
            string inventoryItemName = "item1";

            SceneObjectGroup so1 = SceneHelpers.CreateSceneObject(1, user1Id, "so1", 0x10);
            m_scene.AddSceneObject(so1);
            LSL_Api api = new LSL_Api();
            api.Initialize(m_engine, so1.RootPart, null, null, null);

            // Create an object embedded inside the first
            UUID itemId = TestHelpers.ParseTail(0x20);
            TaskInventoryItem tii 
                = TaskInventoryHelpers.AddSceneObject(m_scene.AssetService, so1.RootPart, inventoryItemName, itemId, user1Id);
            tii.NextPermissions &= ~((uint)PermissionMask.Modify);

            UserAccountHelpers.CreateUserWithInventory(m_scene, user2Id);

            api.llGiveInventory(user2Id.ToString(), inventoryItemName);

            InventoryItemBase receivedItem 
                = UserInventoryHelpers.GetInventoryItem(
                    m_scene.InventoryService, user2Id, string.Format("Objects/{0}", inventoryItemName));

            Assert.IsNotNull(receivedItem);
            Assert.AreEqual(0, receivedItem.CurrentPermissions & (uint)PermissionMask.Modify);
        }

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

            UUID user1Id = TestHelpers.ParseTail(0x1);
            UUID user2Id = TestHelpers.ParseTail(0x2);

            SceneObjectGroup sourceSo = SceneHelpers.AddSceneObject(m_scene, "sourceSo", user1Id);
            m_scene.AddSceneObject(sourceSo);
            LSL_Api api = new LSL_Api();
            api.Initialize(m_engine, sourceSo.RootPart, null, null, null);
            TaskInventoryHelpers.AddScript(m_scene.AssetService, sourceSo.RootPart, "script", "Hello World");

            SceneObjectGroup targetSo = SceneHelpers.AddSceneObject(m_scene, "targetSo", user1Id);
            SceneObjectGroup otherOwnedTargetSo = SceneHelpers.AddSceneObject(m_scene, "otherOwnedTargetSo", user2Id);

            // Test that we cannot load a script when the target pin has never been set (i.e. it is zero)
            api.llRemoteLoadScriptPin(targetSo.UUID.ToString(), "script", 0, 0, 0);
            Assert.IsNull(targetSo.RootPart.Inventory.GetInventoryItem("script"));

            // Test that we cannot load a script when the given pin does not match the target
            targetSo.RootPart.ScriptAccessPin = 5;
            api.llRemoteLoadScriptPin(targetSo.UUID.ToString(), "script", 3, 0, 0);
            Assert.IsNull(targetSo.RootPart.Inventory.GetInventoryItem("script"));

            // Test that we cannot load into a prim with a different owner
            otherOwnedTargetSo.RootPart.ScriptAccessPin = 3;
            api.llRemoteLoadScriptPin(otherOwnedTargetSo.UUID.ToString(), "script", 3, 0, 0);
            Assert.IsNull(otherOwnedTargetSo.RootPart.Inventory.GetInventoryItem("script"));

            // Test that we can load a script when given pin and dest pin match.
            targetSo.RootPart.ScriptAccessPin = 3;
            api.llRemoteLoadScriptPin(targetSo.UUID.ToString(), "script", 3, 0, 0);
            TaskInventoryItem insertedItem = targetSo.RootPart.Inventory.GetInventoryItem("script");
            Assert.IsNotNull(insertedItem);

            // Test that we can no longer load if access pin is unset
            targetSo.RootPart.Inventory.RemoveInventoryItem(insertedItem.ItemID);
            Assert.IsNull(targetSo.RootPart.Inventory.GetInventoryItem("script"));

            targetSo.RootPart.ScriptAccessPin = 0;
            api.llRemoteLoadScriptPin(otherOwnedTargetSo.UUID.ToString(), "script", 3, 0, 0);
            Assert.IsNull(otherOwnedTargetSo.RootPart.Inventory.GetInventoryItem("script"));
        }
    }
}