#include "ui/ModelBrowser/ModelTreeWidget.h"

#include <QResizeEvent>
#include <QUuid>
#include <QVariant>
#include <QMenu>

#include "common/RecourceHelper.h"
#include "common/SpdLogger.h"
#include "entities/EntitiesManager.h"
#include "entities/ComponentFactory.h"
#include "viewer/OsgViewer.h"
#include "viewer/OsgView.h"
#include "viewer/OsgCameraManipulator.h"
#include "viewer/CameraControlManipulator.h"
#include "ui/ModelBrowser/EntityConstent.h"

#include "ui_ModelBrowserPannal.h"


ModelTreeWidget::ModelTreeWidget(QWidget* parent)
    : QTreeWidget(parent){
    setColumnCount(1);
    connect(this, &QTreeWidget::itemClicked, this, &ModelTreeWidget::OnWorkItemCliecked);
    connect(this, &QTreeWidget::itemDoubleClicked, this, &ModelTreeWidget::OnItemDoubleClicked);
}

ModelTreeWidget::~ModelTreeWidget() {
}

void ModelTreeWidget::OnWorkspaceChange(WorkSpace* workSpace) {
    LOG_INFO("WorkSpace change");

    clear();

    currentWorkSpace_ = workSpace;
    if (nullptr == currentWorkSpace_) {
        LOG_WARN("workspace is nullptr");
        return;
    }

    connect(workSpace, &WorkSpace::EntityAdded, this, &ModelTreeWidget::OnEntityAdded);
    connect(workSpace, &WorkSpace::EntityRemoved, this, &ModelTreeWidget::OnEntityRemoved);

    const QString& name = currentWorkSpace_->GetName();
    root_ = new QTreeWidgetItem(this);
    root_->setText(0, name);
    QVariant  root;
    root.setValue(currentWorkSpace_);
    root_->setData(0, E_Workspace, root);
    root_->setData(0, E_UUid, currentWorkSpace_->GetUUid());
    addTopLevelItem(root_);

    const std::vector<Entity*>& entities = currentWorkSpace_->GetEntities();
    for (const auto& entity : entities) {
        AddEntity(root_, entity);
    }
}

void ModelTreeWidget::OnEntityAdded(Entity* entity) {
    if (nullptr == entity) {
        LOG_WARN("entity is nullptr");
        return;
    }

    const QString& entityName = entity->GetName();

    QTreeWidgetItem* item = new QTreeWidgetItem;
    connect(entity, &Entity::NameChanged, [item](const QString& name) {
        LOG_WARN("entity name changed: {}", name.toStdString());
        item->setText(0, name);
        }
    );
    item->setText(0, entityName);
    QVariant  root;
    root.setValue(entity);
    item->setData(0, E_Entity, root);
    item->setData(0, E_UUid, entity->GetUUid());
    root_->addChild(item);
}

void ModelTreeWidget::OnEntityRemoved(Entity* entity) {
    if (nullptr == entity) {
        LOG_WARN("entity is nullptr");
        return;
    }

    const QString& uuid = entity->GetUUid();
    FindAndRemoveItem(uuid);
}

void ModelTreeWidget::contextMenuEvent(QContextMenuEvent* event) {
    QTreeWidgetItem* item = itemAt(event->pos());
    if (nullptr == item) {
        QMenu menu(this);
        QAction* addEntiy = new QAction(tr("Release Track"), this);
        connect(addEntiy, &QAction::triggered, [this]() {
            OnTrackEntity(nullptr);
            }
        );
        menu.addAction(addEntiy);
        menu.exec(event->globalPos());
        return;
    }
    QVariant value = item->data(0, E_Entity);
    if (nullptr != item && value.isValid()) {
        Entity* entity = value.value<Entity*>();
        PopupEntityMenu(event, entity);
    } else {
        QMenu menu(this);

        // 添加菜单项
        QAction* addEntiy = new QAction(tr("Add boke Entity"), this);
        connect(addEntiy, &QAction::triggered, [this]() {
            OnAddMeshEntity("boke/boke.ive", "boke");
            }
        );
        menu.addAction(addEntiy);
        
        addEntiy = new QAction(tr("Add lsjhqt Entity"), this);
        connect(addEntiy, &QAction::triggered, [this]() {
            OnAddMeshEntity("lsjhqt/lsjhqt.flt", "lsjhqt");
            }
        );
        menu.addAction(addEntiy);

        addEntiy = new QAction(tr("Add nimizi Entity"), this);
        connect(addEntiy, &QAction::triggered, [this]() {
            OnAddMeshEntity("nimizi/nimizi.ive", "nimizi");
            }
        );
        menu.addAction(addEntiy);
        
        addEntiy = new QAction(tr("Add tkdlj Entity"), this);
        connect(addEntiy, &QAction::triggered, [this]() {
            OnAddMeshEntity("tkdlj/tkdlj.ive", "tkdlj");
            }
        );
        menu.addAction(addEntiy);

        addEntiy = new QAction(tr("Add jiaofan Entity"), this);
        connect(addEntiy, &QAction::triggered, [this]() {
            OnAddMeshEntity("jf/decorative-shape-008.obj", "jiaofan");
            }
        );
        menu.addAction(addEntiy);
        
        addEntiy = new QAction(tr("Add satellite Entity"), this);
        connect(addEntiy, &QAction::triggered, [this]() {
            OnAddSatelliteEntity();
            }
        );
        menu.addAction(addEntiy);

        // 显示菜单
        menu.exec(event->globalPos());
    }
   
}

void ModelTreeWidget::OnWorkItemChanged(WorkSpaceItem* item) {
    LOG_INFO("WorkItemChanged");
    if (nullptr == item) {
        LOG_WARN("item is nullptr");
        return;
    }

}

void ModelTreeWidget::OnWorkItemCliecked(QTreeWidgetItem* item, int column) {
    QVariant value = item->data(column, E_Entity);
    bool isEntity = true;
    if (!value.isValid()) {
        value = item->data(column, E_Workspace);
        isEntity = false;
    }
    if (!value.isValid()) {
        LOG_WARN("unknown data rol");
        return;
    }

    if (isEntity) {
        emit EntityChange(value);
    } else {
        emit WorkSpaceChange(value);
    }
}

void ModelTreeWidget::OnItemDoubleClicked(QTreeWidgetItem* item, int column) {
    QVariant value = item->data(column, E_Entity);
    bool isEntity = true;
    if (!value.isValid()) {
        LOG_WARN("unknown data E_Entity");
        return;
    }

    Entity* entity = value.value<Entity*>();
    if (nullptr == entity) {
        LOG_WARN("entity is nullptr");
        return;
    }

    OnTrackEntity(entity);
}

void ModelTreeWidget::OnAddMeshEntity(const QString& mesh, const QString& name) {
    if (nullptr == currentWorkSpace_) {
        LOG_WARN("currentWorkSpace_ is nullptr");
        return;
    }

    Entity* entity = EntitiesManager::Get().CreateMesh(mesh);

    int count = currentWorkSpace_->GetEntities().size();
    entity->SetName(QString("%1_%2").arg(name).arg(count));
    currentWorkSpace_->AddEntity(entity);
}

SceneComponent* ModelTreeWidget::OnAddComponent(const QString& typeName, Entity* entity) {
    LOG_INFO("enter, typename:{}", typeName.toStdString().c_str());
    if (nullptr == entity) {
        LOG_WARN("entity is nullptr");
        return nullptr;
    }

    SceneComponent* rootComponent = entity->GetRootComponent();
    SceneComponent* conponent = ComponentFactory::Create(typeName, rootComponent);
    conponent->AttachTo(rootComponent);
    //conponent->AttachEntity(entity);

    QVariant value;
    value.setValue(entity);
    emit EntityChange(value);
    return conponent;
}

void ModelTreeWidget::OnDeleteEntity(Entity* entity) {
    LOG_INFO("enter");
    if (nullptr == entity) {
        LOG_WARN("entity is nullptr");
        return;
    }

    entity->Destory();
}

void ModelTreeWidget::PopupEntityMenu(QContextMenuEvent* event, Entity* entity) {
    QMenu menu(this);

    QAction* addEntiy = new QAction(tr("Track"), this);
    menu.addAction(addEntiy);
    connect(addEntiy, &QAction::triggered, [this, entity]() {
        OnTrackEntity(entity);
        }
    );

    // 添加菜单项
    addEntiy = new QAction(tr("Add Mesh Component"), this);
    menu.addAction(addEntiy);

    // 将菜单项添加到菜单中
    addEntiy = new QAction(tr("Add Path Component"), this);
    menu.addAction(addEntiy);
    connect(addEntiy, &QAction::triggered, [this, entity]() {
        OnAddComponent("PathComponent", entity);
        }
    );

    addEntiy = new QAction(tr("Delete"), this);
    menu.addAction(addEntiy);
    connect(addEntiy, &QAction::triggered, [this, entity]() {
        OnDeleteEntity(entity);
        }
    );

    // 显示菜单
    menu.exec(event->globalPos());
}

void ModelTreeWidget::FindAndRemoveItem(const QString& itemToRemove) {
    for (int i = 0; i < topLevelItemCount(); ++i) {
        QTreeWidgetItem* topItem = topLevelItem(i);
        if (RemoveItemFromParent(topItem, itemToRemove)) {
            break;
        }
    }
}

bool ModelTreeWidget::RemoveItemFromParent(QTreeWidgetItem* parentItem, const QString& itemToRemove) {
    for (int i = 0; i < parentItem->childCount(); ++i) {
        QTreeWidgetItem* childItem = parentItem->child(i);
        const QString uuid = childItem->data(0, E_UUid).toString();
        if (uuid == itemToRemove) {
            while (childItem->childCount() > 0) {
                QTreeWidgetItem* grandChildItem = childItem->child(0);
                childItem->removeChild(grandChildItem);
            }

            parentItem->removeChild(childItem);
            return true;
        }

        if (RemoveItemFromParent(childItem, itemToRemove)) {
            return true;
        }
    }

    return false;
}

void ModelTreeWidget::OnAddSatelliteEntity() {
    if (nullptr == currentWorkSpace_) {
        LOG_WARN("currentWorkSpace_ is nullptr");
        return;
    }

    //const QString mesh("sat/sat.ive");
    const QString mesh("satellite/satellite.ive");
    Entity* entity = EntitiesManager::Get().CreateMesh(mesh);
    int count = currentWorkSpace_->GetEntities().size();
    entity->SetName(QString("%1_%2").arg("satellite").arg(count));
    OnAddComponent("ConeWaveComponent", entity);
    currentWorkSpace_->AddEntity(entity);
}

void ModelTreeWidget::OnTrackEntity(Entity* entity) {
    OsgCameraManipulator* manipulator = OsgViewer::Get().GetView()->GetCameraManipulator();
    if (nullptr == manipulator) {
        LOG_WARN("manipulator is nullptr");
        return;
    }

    
    osgGA::CameraManipulator* gaManipulator = manipulator->GetManipulator();
    CameraControlManipulator* ccm = dynamic_cast<CameraControlManipulator*>(gaManipulator);
    if (nullptr != ccm) {
        if (nullptr != entity) {
            osg::MatrixTransform* mt = entity->GetRootComponent()->GetMatrixTransform();
            ccm->setManipulatorMode(CameraControlManipulator::Tracker_ManipulatorMode);
            ccm->setTrackNode(mt);
        } else {
            ccm->setManipulatorMode(CameraControlManipulator::Roam_ManipulatorMode);
        }
    }
}

void ModelTreeWidget::AddEntity(class QTreeWidgetItem* parent, Entity* entity) {
    const QString& entityName = entity->GetName();

    QTreeWidgetItem* item = new QTreeWidgetItem;
    connect(entity, &Entity::NameChanged, [item](const QString& name) {
        LOG_WARN("entity name changed: {}", name.toStdString());
        item->setText(0, name);
        }
    );
    item->setText(0, entityName);
    QVariant  root;
    root.setValue(entity);
    item->setData(0, E_Entity, root);
    item->setData(0, E_UUid, entity->GetUUid());
    parent->addChild(item);

    const std::vector<Entity*>& childer = entity->GetChilder();
    for (const auto& child : childer) {
        AddEntity(item, child);
    }
}