/*
* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
* its licensors.
*
* For complete copyright and license terms please see the LICENSE at the root of this
* distribution (the "License"). All use of this software is governed by the License,
* or, if provided, by the license below or the license accompanying this file. Do not
* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
*/

#include <gtest/gtest.h>

#include <Tests/UI/UIFixture.h>
#include <EMotionFX/CommandSystem/Source/CommandManager.h>
#include <EMotionFX/Source/AnimGraphManager.h>
#include <EMotionFX/Source/AnimGraphMotionNode.h>
#include <EMotionFX/Source/AnimGraphStateMachine.h>
#include <EMotionStudio/Plugins/StandardPlugins/Source/AnimGraph/AnimGraphPlugin.h>
#include <QApplication>
#include <QtTest>
#include "qtestsystem.h"

namespace EMotionFX
{
    class RemoveTransitionFixture
        : public UIFixture
    {
    public:
        void SetUp() override
        {
            UIFixture::SetUp();
            AZStd::string commandResult;

            MCore::CommandGroup group;

            // Create empty anim graph, add a motion node and a blend tree.
            group.AddCommandString(AZStd::string::format("CreateAnimGraph -animGraphID %d", m_animGraphId));
            group.AddCommandString(AZStd::string::format("AnimGraphCreateNode -animGraphID %d -type %s -parentName Root -xPos 100 -yPos 100 -name testMotion",
                m_animGraphId, azrtti_typeid<AnimGraphMotionNode>().ToString<AZStd::string>().c_str()));
            group.AddCommandString(AZStd::string::format("AnimGraphCreateNode -animGraphID %d -type %s -parentName Root -xPos 200 -yPos 100 -name testBlendTree",
                m_animGraphId, azrtti_typeid<BlendTree>().ToString<AZStd::string>().c_str()));
            group.AddCommandString(AZStd::string::format("AnimGraphCreateConnection -animGraphID %d -transitionType %s -sourceNode testMotion -targetNode testBlendTree",
                m_animGraphId, azrtti_typeid<AnimGraphStateTransition>().ToString<AZStd::string>().c_str()));

            EXPECT_TRUE(CommandSystem::GetCommandManager()->ExecuteCommandGroup(group, commandResult)) << commandResult.c_str();
            m_animGraph = GetAnimGraphManager().FindAnimGraphByID(m_animGraphId);
            EXPECT_NE(m_animGraph, nullptr) << "Cannot find newly created anim graph.";
        }

        void TearDown() override
        {
            QApplication::processEvents(QEventLoop::ExcludeUserInputEvents);
            delete m_animGraph;
            UIFixture::TearDown();
        }

    public:
        const AZ::u32           m_animGraphId = 64;
        AnimGraph*              m_animGraph = nullptr;
    };

    TEST_F(RemoveTransitionFixture, RemoveTransition)
    {
        RecordProperty("test_case_id", "C15031141");

        auto animGraphPlugin = static_cast<EMStudio::AnimGraphPlugin*>(EMStudio::GetPluginManager()->FindActivePlugin(EMStudio::AnimGraphPlugin::CLASS_ID));
        ASSERT_TRUE(animGraphPlugin) << "Anim graph plugin not found.";

        EMStudio::AnimGraphModel& animGraphModel = animGraphPlugin->GetAnimGraphModel();

        // Find the transition between the motion node and the blend tree.
        AnimGraphStateTransition* transition = m_animGraph->GetRootStateMachine()->GetTransition(0);
        ASSERT_TRUE(transition) << "Anim graph transition not found.";

        // Select the transition in the anim graph model.
        const QModelIndex& modelIndex = animGraphModel.FindFirstModelIndex(transition);
        const EMStudio::AnimGraphModel::ModelItemType itemType = modelIndex.data(EMStudio::AnimGraphModel::ROLE_MODEL_ITEM_TYPE).value<EMStudio::AnimGraphModel::ModelItemType>();
        ASSERT_TRUE(modelIndex.isValid()) << "Anim graph transition has an invalid model index.";
        animGraphModel.GetSelectionModel().select(QItemSelection(modelIndex, modelIndex), QItemSelectionModel::Current | QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);

        // Delete key pressed.
        EMStudio::BlendGraphWidget* blendGraphWidget = animGraphPlugin->GetGraphWidget();
        QTest::keyClick((QWidget*)blendGraphWidget, Qt::Key_Delete);

        // Check if the transition get deleted.
        ASSERT_EQ(0, m_animGraph->GetRootStateMachine()->GetNumTransitions()) << " Anim Graph transition should be removed";
    }
} // namespace EMotionFX