#include "dbStructureView.h"
#include "dbStructureNode.h"
#include "dbStructureModel.h"
#include "mainwindow.h"
#include "dbManager.h"
#include "customMenu.h"
#include <QMenu>
#include <QPoint>
#include <QMouseEvent>

DBStructureView::DBStructureView(DatabaseManager* dbManager, QWidget* parent)
    : QTreeView(parent), m_dbManager(dbManager), m_pMainWindow(nullptr)
{
    // connect(m_dbManager, &DatabaseManager::connectionStatusChanged,
    //         [this](const QString& connName, bool connected)
    //         {

    //         });

    m_curConnection = "";
    initView();
}

DBStructureView::~DBStructureView()
{

}

void DBStructureView::setMainWindow(MainWindow* window)
{
    m_pMainWindow = window;
}

void DBStructureView::mouseDoubleClickEvent(QMouseEvent* event)
{
    //只对鼠标左键的双击事件进行响应
    if(event->button() != Qt::LeftButton)
    {
        //event->accept();
        return;
    }
    QTreeView::mouseDoubleClickEvent(event);
}

void DBStructureView::initView()
{
    setHeaderHidden(true);
    setContextMenuPolicy(Qt::CustomContextMenu);
    setSelectionMode(SingleSelection);

    connect(this, &QTreeView::doubleClicked, this, &DBStructureView::itemDoubleClick);
    connect(this, &QTreeView::customContextMenuRequested, this ,&DBStructureView::showContextMenu);
}

void DBStructureView::openConnection(const QString& connection)
{
    connectToDB(connection);
    m_curConnection = connection;
}

void DBStructureView::connectToDB(const QString& connName)
{
    DBStructureModel* model = dynamic_cast<DBStructureModel*>(this->model());
    if(model && m_dbManager)
    {
        bool bResutl = m_dbManager->connect(connName);
        if(bResutl)
            model->refreshStructure_Connection(connName);

        /*QModelIndex index = model->getConnNodeIndex(connName);
        if(index.isValid())
        {
            if(!isExpanded(index))
                expand(index);
        }*/
    }
}

void DBStructureView::disconnectToDB(const QString& connName)
{
    DBStructureModel* model = dynamic_cast<DBStructureModel*>(this->model());
    if(model && m_dbManager)
    {
        m_dbManager->disconnect(connName);
        model->refreshStructure_Connection(connName);
        QModelIndex index = model->getConnNodeIndex(connName);
        if(index.isValid())
            collapse(index);
    }
}

void DBStructureView::removeNode(DBStructureNode* node)
{
    if(!node)
    {
        if(m_pMainWindow)
            m_pMainWindow->showMessageDialog(type_warning, QString::fromWCharArray(L"错误"),
                                             QString::fromWCharArray(L"获取节点数据失败"));
        return;
    }

    if(node->type() == ConnectionNode)
    {
        DBStructureModel* model = dynamic_cast<DBStructureModel*>(this->model());
        if(model && m_dbManager)
        {
            m_dbManager->removeDatabase(node->name());
            model->removeConnection(node->name());
        }
    }
    else if(node->type() == TableNode)
    {
        DBStructureModel* model = dynamic_cast<DBStructureModel*>(this->model());
        if(model)
            model->removeDataModel(node);
    }
    else if(node->type() == GroupNode)
    {
        DBStructureModel* model = dynamic_cast<DBStructureModel*>(this->model());
        if(model)
            model->removeDataGroup(node);
    }
}

void DBStructureView::openAttributeGroup(DBStructureNode* node)
{
    DBStructureNode* parent = node->parentNode();
    if(parent && parent->type() == TableNode)
    {
        int modelID = parent->data(Qt::UserRole + NodeDataRole::ID).toInt();
        int groupID = node->data(Qt::UserRole + NodeDataRole::ID).toInt();
        QString modelName = parent->name();
        QString groupName = node->name();
        ModelAttributeGroup attributeGroup(modelID, groupID, modelName, groupName);
        emit openAttributeInfo(m_curConnection, attributeGroup);
    }
}

void DBStructureView::closeAttributeGroup(DBStructureNode* node)
{
    DBStructureNode* parent = node->parentNode();
    if(parent && parent->type() == TableNode)
    {
        int modelID = parent->data(Qt::UserRole + NodeDataRole::ID).toInt();
        int groupID = node->data(Qt::UserRole + NodeDataRole::ID).toInt();
        QString modelName = parent->name();
        QString groupName = node->name();
        ModelAttributeGroup attributeGroup(modelID, groupID, modelName, groupName);
        emit closeAttributeInfo(attributeGroup);
    }
}

void DBStructureView::disconnectCurConnection()
{
    if(!m_curConnection.isEmpty())
    {
        disconnectToDB(m_curConnection);
        m_curConnection = "";
    }
}

const QString DBStructureView::curConnection()
{
    return m_curConnection;
}

DBStructureNode* DBStructureView::currentNode()
{
    QModelIndex currentInex = currentIndex();
    DBStructureNode* node = static_cast<DBStructureNode*>(currentInex.internalPointer());
    return node;
}

void DBStructureView::onActionTrigger_removeModel()
{
    DBStructureNode* node = currentNode();
    if(!node || (node->type() != TableNode && node->type() != GroupNode))
    {
        if(m_pMainWindow)
            m_pMainWindow->showMessageDialog(type_warning, QString::fromWCharArray(L"错误"),
                                             QString::fromWCharArray(L"请先选择一个模型节点"));

        return;
    }

    if(node->type() == TableNode)
    {
        if(m_pMainWindow)
        {
            m_pMainWindow->showMessageDialog(type_question, QString::fromWCharArray(L"提示"),
                                             QString::fromWCharArray(L"确认删除模型 '%1' 吗").arg(node->name()));
            if(g_msgDlgBtn == btn_No)
                return;
        }
        removeNode(node);
    }
    else if(node->type() == GroupNode)
    {
        DBStructureNode* parent = node->parentNode();
        if(m_pMainWindow)
        {
            m_pMainWindow->showMessageDialog(type_question, QString::fromWCharArray(L"提示"),
                                             QString::fromWCharArray(L"确认删除模型 '%1' 吗").arg(parent->name()));
            if(g_msgDlgBtn == btn_No)
                return;
        }
        removeNode(parent);
    }
}

void DBStructureView::itemDoubleClick(const QModelIndex& index)
{
    DBStructureNode* node = static_cast<DBStructureNode*>(index.internalPointer());
    if(node->type() == ConnectionNode)
    {
        //先断掉当前链接
        disconnectCurConnection();
        //打开新链接
        openConnection(node->name());
    }
    else if(node->type() == GroupNode)
    {
        openAttributeGroup(node);
    }
}

void DBStructureView::showContextMenu(const QPoint& pos)
{
    QModelIndex index = indexAt(pos);
    if(!index.isValid())
        return;

    DBStructureNode* node = static_cast<DBStructureNode*>(index.internalPointer());
    if(node && node->type() == ConnectionNode)
    {
        bool isConnected = true;
        if(node->status() == Disconnect)
            isConnected = false;

        QString connName = node->name();
        CustomMenu menu;
        menu.addAction(QString::fromWCharArray(L"链接"), [this, &connName]{
                //先断掉当前链接
                disconnectCurConnection();
                //打开新链接
                openConnection(connName);
                //展开链接
                DBStructureModel* model = dynamic_cast<DBStructureModel*>(this->model());
                QModelIndex index = model->getConnNodeIndex(connName);
                if(model && index.isValid())
                    expand(index);
            })->setEnabled(!isConnected);
        menu.addAction(QString::fromWCharArray(L"断开链接"), [this, &connName]{disconnectCurConnection();})->setEnabled(isConnected);
        menu.addAction(QString::fromWCharArray(L"刷新"), [this, &connName]{
            DBStructureModel* model = dynamic_cast<DBStructureModel*>(this->model());
            if(model)
                model->refreshStructure_Connection(connName);
        })->setEnabled(isConnected);
        menu.addAction(QString::fromWCharArray(L"移除链接"), [this, &connName, node]{
            if(m_pMainWindow)
            {
                m_pMainWindow->showMessageDialog(type_question, QString::fromWCharArray(L"提示"),
                                                 QString::fromWCharArray(L"确认删除链接 '%1' 吗").arg(connName));
                if(g_msgDlgBtn == btn_No)
                    return;
            }
            removeNode(node);
        });
        menu.addSeparator();
        menu.addAction(QString::fromWCharArray(L"添加模型"), [this]{emit actionTrigger_addModel();})->setEnabled(isConnected);
        /*menu.addAction(QString::fromWCharArray(L"导入数据"), []{});
        menu.addAction(QString::fromWCharArray(L"导出数据"), []{});*/
        QPoint originPoint = this->mapToGlobal(QPoint(0,0));
        menu.exec(originPoint + pos);
    }
    else if(node && node->type() == TableNode)
    {
        CustomMenu menu;
        menu.addAction(QString::fromWCharArray(L"删除"), [this, node]{
            if(m_pMainWindow)
            {
                m_pMainWindow->showMessageDialog(type_question, QString::fromWCharArray(L"提示"),
                                                 QString::fromWCharArray(L"确认删除模型 '%1' 吗").arg(node->name()));
                if(g_msgDlgBtn == btn_No)
                    return;
            }
            removeNode(node);
        });
        menu.addAction(QString::fromWCharArray(L"刷新"), []{});
        menu.addSeparator();
        menu.addAction(QString::fromWCharArray(L"添加属性组"), [this, node]{
            emit actionTrigger_addGroup(node->data(Qt::UserRole + NodeDataRole::ID).toInt());
        });
        //menu.addAction(QString::fromWCharArray(L"打开"), []{});
        /*menu.addSeparator();
        menu.addAction(QString::fromWCharArray(L"清空数据"), []{});
        menu.addAction(QString::fromWCharArray(L"导入"), []{});
        menu.addAction(QString::fromWCharArray(L"导出"), []{});*/
        QPoint originPoint = this->mapToGlobal(QPoint(0,0));
        menu.exec(originPoint + pos);
    }
    else if(node && node->type() == GroupNode)
    {
        CustomMenu menu;
        menu.addAction(QString::fromWCharArray(L"打开"), [this, node]{openAttributeGroup(node);});
        menu.addAction(QString::fromWCharArray(L"删除"), [this, node]{
            bool isPublic = node->data(Qt::UserRole + NodeDataRole::Type).toBool();
            if(isPublic)
            {
                if(m_pMainWindow)
                {
                    m_pMainWindow->showMessageDialog(type_warning, QString::fromWCharArray(L"错误"),
                                                     QString::fromWCharArray(L"该属性组属于必备组别，不可删除"));
                }
                return;
            }
            if(m_pMainWindow)
            {
                m_pMainWindow->showMessageDialog(type_question, QString::fromWCharArray(L"提示"),
                                                 QString::fromWCharArray(L"确认删除属性组 '%1' 吗").arg(node->name()));
                if(g_msgDlgBtn == btn_No)
                    return;
            }
            //关闭tab(若打开)
            closeAttributeGroup(node);
            //移除节点
            removeNode(node);
        });
        menu.addSeparator();
        menu.addAction(QString::fromWCharArray(L"清空数据"), []{});
        QPoint originPoint = this->mapToGlobal(QPoint(0,0));
        menu.exec(originPoint + pos);
    }
}