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

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

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

void DiagramView::initial()
{
    QStyle *style = QApplication::style();
    m_iconUnsaved = style->standardIcon(QStyle::SP_DialogNoButton);
    m_iconSaved = style->standardIcon(QStyle::SP_DialogYesButton);

    connect(ui->treeView, &QTreeView::customContextMenuRequested, this, &DiagramView::onIndexRbtnClicked);
    connect(ui->treeView, &QTreeView::clicked, this, &DiagramView::onItemClicked);
    connect(_pModel, &QStandardItemModel::itemChanged, this, &DiagramView::onItemChanged);
    connect(ui->btn_new, &QPushButton::clicked, this, &DiagramView::onNewHMIClicked);
    connect(ui->btn_save, &QPushButton::clicked, this, &DiagramView::onSaveHMIClicked);
    ui->treeView->setHeaderHidden(true);
    // 设置模型的列数
    _pModel->setColumnCount(3);
    _pModel->setHorizontalHeaderLabels({"名称", "状态", "修改时间"});

    QList<HMIPageInfo> lst = DataBase::GetInstance()->getAllHMI();
    for(auto& info:lst)
    {
        QString sLastSave = info.context["lastSave"].toString();

        QList<QStandardItem*> rowItems;

        QStandardItem* pItem = new QStandardItem(info.name);        //名称
        pItem->setData(info.uid,Qt::UserRole);
        rowItems.append(pItem);

        QStandardItem *stateItem = new QStandardItem();             //状态
        updateState(stateItem,1);
        rowItems.append(stateItem);
        stateItem->setEditable(false);

        QStandardItem *timeItem = new QStandardItem(sLastSave);             //修改时间
        rowItems.append(timeItem);
        timeItem->setEditable(false);

        _pModel->appendRow(rowItems);
    }

    // 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("组态列表"));
    ui->treeView->header()->setStretchLastSection(false);
    ui->treeView->header()->setSectionResizeMode(0, QHeaderView::Stretch);
    ui->treeView->header()->setSectionResizeMode(1, QHeaderView::ResizeToContents);
    ui->treeView->header()->setSectionResizeMode(2, QHeaderView::ResizeToContents);

}

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()) {
        QStandardItem* item = _pModel->itemFromIndex(index);
        QVariant parentId = item->data(Qt::UserRole+1);

        if(item)
        {
            QAction *saveAction = new QAction("保存", this);
            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(saveAction);
            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).toUuid();
    info.sName = str;
    emit diagramChange(info);
}

void DiagramView::onItemClicked(const QModelIndex &index)
{
    QModelIndex firstIndex = index.sibling(0,index.column());       //取行首item
    if(firstIndex.isValid()){
        QStandardItem* item = _pModel->itemFromIndex(firstIndex);
        QStandardItem* parent = item->parent();
        if(item)
        {
            DiagramInfo info;
            info.id = item->data(Qt::UserRole).toUuid();
            info.sName = item->text();
            if(parent)
                info.parentId = parent->data(Qt::UserRole).toInt();
            emit diagramSelected(info);
        }
    }
}

void DiagramView::onNewHMICreated(const QString& str,QUuid id)
{
    QList<QStandardItem*> rowItems;

    QStandardItem* pItem = new QStandardItem(str);        //名称
    pItem->setData(id,Qt::UserRole);
    rowItems.append(pItem);

    QStandardItem *stateItem = new QStandardItem();             //状态
    updateState(stateItem,0);
    rowItems.append(stateItem);
    stateItem->setEditable(false);

    QStandardItem *timeItem = new QStandardItem();             //修改时间
    rowItems.append(timeItem);
    timeItem->setEditable(false);

    _pModel->appendRow(rowItems);
}

void DiagramView::onHMIUpdated(const QString& str,QUuid id,int nState,QString sTime)
{
    int rowCount = _pModel->rowCount();

    for (int row = 0; row < rowCount; ++row) {
        // 获取第一列（名称列）的item
        QStandardItem *nameItem = _pModel->item(row, 0);
        if (nameItem) {
            QString name = nameItem->text();
            if(name == str){
                QStandardItem *stateItem = _pModel->item(row, 1);
                stateItem->setText(nState?"已保存":"未保存");

                QStandardItem *timeItem = _pModel->item(row, 2);
                timeItem->setText(sTime);
                break;
            }
        }
    }
}

void DiagramView::onHMISaved(const QString& strPro,const QString& autor,QUuid uid,QString sTime)
{

}

void DiagramView::onNewHMIClicked()
{
    emit prepareCreateHMI();
}

void DiagramView::onSaveHMIClicked()
{

}

void DiagramView::updateState(QStandardItem* p,int n)
{
    if(p){
        if(n == 0){     //未保存
            p->setText("未保存");
            p->setIcon(m_iconUnsaved);
        }
        else if(n == 1){        //已保存
            p->setText("已保存");
            p->setIcon(m_iconSaved);
        }
    }
}

void DiagramView::updateSaveTime(QStandardItem* p,QString s)
{
    if(p){
        p->setText(s);
    }
}

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;
    }
}