#include <QStandardItemModel>
#include <QMenu>
#include <QUuid>
#include "diagramView.h"
#include "ui_diagramView.h"
#include "tools.h"
#include "topologyManager.h"
#include "projectManager.h"
#include "dataBase.h"

DiagramView::DiagramView(QWidget *parent)
    : QDialog(parent)
    , ui(new Ui::diagramView)
    ,_pModel(nullptr)
{
    ui->setupUi(this);
    _pModel = new QStandardItemModel(this);
    ui->treeView->setContextMenuPolicy(Qt::CustomContextMenu);
    ui->treeWidget->setContextMenuPolicy(Qt::CustomContextMenu);
    _count = 0;
}

DiagramView::~DiagramView()
{
    delete ui;
}

void DiagramView::initial()
{
    connect(ui->treeView, &QTreeView::customContextMenuRequested, this, &DiagramView::onIndexRbtnClicked);
    connect(ui->treeWidget, &QTreeView::customContextMenuRequested, this, &DiagramView::onEditorRbtnClicked);
    connect(ui->treeView, &QTreeView::clicked, this, &DiagramView::onItemClicked);
    connect(_pModel, &QStandardItemModel::itemChanged, this, &DiagramView::onItemChanged);
    connect(ui->btn_new, &QPushButton::clicked, this, &DiagramView::onNewEditorClicked);
    connect(ui->btn_open, &QPushButton::clicked, this, &DiagramView::onOpenEditorClicked);
    connect(ui->btn_save, &QPushButton::clicked, this, &DiagramView::onSaveEditorClicked);
    connect(&ProjectManager::instance(),&ProjectManager::createNewEditor,this,&DiagramView::onNewEditorCreated);
    connect(&ProjectManager::instance(),&ProjectManager::editorSaved,this,&DiagramView::onEditorSaved);
    ui->treeView->setHeaderHidden(true);
    ui->treeWidget->setHeaderHidden(true);
    ui->treeWidget->setColumnCount(2);
    // 设置模型的列数
    _pModel->setColumnCount(1);

    //QList<QStandardItem*> pageList;
    QList<pageInfo> lst = DataBase::GetInstance()->getAllPage();
    for(auto info:lst)
    {
        QStandardItem* pItem = new QStandardItem(info.name);
        pItem->setData(info.id,Qt::UserRole);
        //pageList.append(pItem);
        _pModel->appendRow(pItem);
    }
    //_pModel->appendRow(pageList);

    // 创建树视图
    ui->treeView->setModel(_pModel);

    // 展开所有节点
    ui->treeView->expandAll();
    // 显示树视图
    ui->treeView->setWindowTitle(QObject::tr("组态图结构"));
}

void DiagramView::loadTopologyFromDB()
{

}

void DiagramView::onIndexRbtnClicked(const QPoint &pos)
{
    // 获取当前点击的位置对应的索引
    QMenu menu;
    QModelIndex index = ui->treeView->indexAt(pos);
    if (!index.isValid()) {
        // 如果点击的是空白区域，创建新组态图菜单

        QAction *addAction = new QAction("添加组态图", this);

        connect(addAction,&QAction::triggered,this,[&](){
            QVariant id = QUuid::createUuid();

            QString sName = generateName();
            QStandardItem *item = new QStandardItem(sName);
            item->setData(id,Qt::UserRole+1);
            _pModel->appendRow(item);

            DiagramInfo info;
            //todo:具体信息
            info.id = id;          //新建的组态图随机赋予临时id
            info.sName = sName;
            info.sTag = sName;
            emit diagramCreate(info);
        });

        menu.addAction(addAction);
    }
    else{       //目标组态图下添加子组态图
        QStandardItem* item = _pModel->itemFromIndex(index);
        QVariant parentId = item->data(Qt::UserRole+1);

        if(item)
        {
            QAction *addAction = new QAction("添加子组态图", this);

            connect(addAction,&QAction::triggered,this,[&](){
                QVariant id = QUuid::createUuid();

                QString sName = generateName();
                QStandardItem *item = new QStandardItem(sName);
                item->setData(id,Qt::UserRole+1);
                item->appendRow(item);

                DiagramInfo info;
                //todo:具体信息
                info.id = id;          //新建的随机赋予临时id
                info.sName = sName;
                info.sTag = sName;
                info.parentId = parentId;
                emit diagramCreate(info);
            });

            menu.addAction(addAction);


            QAction *delAction = new QAction("删除", this);
            connect(delAction,&QAction::triggered,this,[&](){
                QModelIndex currentIndex = ui->treeView->currentIndex();
                if(currentIndex.isValid())
                {
                    QStandardItem* pItem = _pModel->itemFromIndex(currentIndex);
                    QVariant id = pItem->data(Qt::UserRole+1);
                    QString sName = pItem->text();
                    if(pItem)
                    {
                        QString str = item->text();
                        DiagramInfo info;
                        //todo:具体信息
                        info.id = id;          //新建的随机赋予临时id
                        info.sName = sName;
                        info.sTag = sName;
                        info.parentId = parentId;
                        emit diagramDelete(info);

                        QStandardItem* pParent = item->parent();
                        if(pParent)
                        {
                            pParent->removeRow(currentIndex.row());
                        }
                    }
                }
            });
            menu.addAction(delAction);
        }
    }

    // 在点击位置显示菜单
    menu.exec(ui->treeView->mapToGlobal(pos));
}

void DiagramView::onItemChanged(QStandardItem *item)
{
    int nLevel = getLevel(item);
    QString str = item->text();         //名称可能修改
    DiagramInfo info;
    info.id = item->data(Qt::UserRole).toInt();
    info.sName = str;
    emit diagramChange(info);
}

void DiagramView::onItemClicked(const QModelIndex &index)
{
    QStandardItem* item = _pModel->itemFromIndex(index);
    QStandardItem* parent = item->parent();
    if(item)
    {
        DiagramInfo info;
        info.id = item->data(Qt::UserRole).toInt();
        info.sName = item->text();
        if(parent)
            info.parentId = parent->data(Qt::UserRole).toInt();
        emit diagramSelected(info);
    }
}

void DiagramView::onEditorRbtnClicked(const QPoint &pos)
{
    QTreeWidgetItem *item = ui->treeWidget->itemAt(pos);
    if (!item) return;

    int level = getItemLevel(item);

    QMenu menu(this);

    switch (level) {
    case 1:{ // 顶级节点
            QAction *actSaveTop = menu.addAction("保存");
            QAction *actGenTop = menu.addAction("生成");
            menu.addSeparator();
            QAction *actDelTop = menu.addAction("删除");

            QAction *act = menu.exec(ui->treeWidget->mapToGlobal(pos));
            if(act == actSaveTop){
                ProjectManager::instance().saveEditor(item->text(0));
            }
            else if(act == actGenTop){

            }
            else if(act == actDelTop){

            }
        }
        break;
    case 2:{ // 二级节点
        }
        break;
    case 3:{ // 三级节点
        }
        break;
    }

}

void DiagramView::onNewEditorCreated(const QString& str,QUuid id)
{
    ui->treeWidget->clear();
    QTreeWidgetItem *topLevelItem = new QTreeWidgetItem(ui->treeWidget);
    topLevelItem->setText(0, str);
    topLevelItem->setData(0,Qt::UserRole,id);
    topLevelItem->setText(1,"未保存");
    topLevelItem->setForeground(1,Qt::yellow);
}

void DiagramView::onEditorSaved(const QString& str,QUuid uid)
{
    QTreeWidgetItemIterator it(ui->treeWidget);
    while (*it) {
        QTreeWidgetItem* item = *it;
        if(item->data(0,Qt::UserRole).toUuid() == uid)
        {
            item->setText(1,"已保存");
            item->setForeground(1,Qt::green);
            break;
        }
        ++it;
    }
}

void DiagramView::onNewEditorClicked()
{

}

void DiagramView::onOpenEditorClicked()
{
    emit loadProject();
}

void DiagramView::onSaveEditorClicked()
{

}

QString DiagramView::generateName()
{
    QString sName = QString::fromWCharArray(L"组态图_")+QString::number(_count);
    QModelIndex Idx = findIndex(_pModel,sName);
    if(Idx.isValid())       //已存在
    {
        _count += 1;
        return generateName();
    }
    else {
        return sName;
    }
}

int DiagramView::getItemLevel(QTreeWidgetItem *item) {
    int level = 0;
    while (item->parent()) {
        level++;
        item = item->parent();
    }
    return level + 1; // 顶级节点为1级
}