//
// Created by Krad on 2022/7/19.
//

#include "DialogManager.h"

#include <QApplication>
#include <QWidget>
#include <QThread>
#include <qDebug>

#include "event/EventCenter.h"
#include "dialogs/GUIMessageDialog.h"
#include "dialogs/ChangePasswordFormDialog.h"
#include "dialogs/AccountFormDialog.h"
#include "appvals/AppGlobalValues.h"
#include "windows/LoginDialog.h"



DialogManager::DialogManager()
: QObject()
, mFunctionDialog(nullptr)
, mMessageDialog(nullptr)
, topWidget(nullptr)
{

}

void DialogManager::init() {
    connect(EventCenter::Default(), &EventCenter::DeviceErrorRaise,this,&DialogManager::raiseDeviceError);
    connect(EventCenter::Default(), &EventCenter::InvokeOperationStart,this,&DialogManager::invokeOperationStart);
    connect(EventCenter::Default(), &EventCenter::InvokeOperationProgress,this,&DialogManager::invokeOperationProgress);
    connect(EventCenter::Default(), &EventCenter::InvokeOperationPending,this,&DialogManager::invokeOperationPending);
    connect(EventCenter::Default(), &EventCenter::InvokeOperationEnd,this,&DialogManager::invokeOperationEnd);
}

//得考虑多线程的问题
void DialogManager::setTopWidget(QWidget* widget) {
    std::lock_guard<std::mutex> lockGuard(mutex);
    if (!topWidget&& QApplication::activeWindow()){
        topWidget = QApplication::activeWindow();
    }
    qDebug()<<"last top:"<<topWidget->objectName()<<", new top:"<<widget->objectName();
    widget->setParent(topWidget,widget->windowFlags());
    topWidget = widget;
    ++mDialogCount;
}

void DialogManager::releaseTopWidget(QWidget* expectedTopWidget) {
    std::lock_guard<std::mutex> lockGuard(mutex);
    if (topWidget == expectedTopWidget){
        topWidget = expectedTopWidget->parentWidget();
    }
    else{
        while (auto tempWidget = topWidget->parentWidget()){
            if (tempWidget->parentWidget() == expectedTopWidget){
                tempWidget->setParent(expectedTopWidget->parentWidget());
                break;
            }
        }
    }
    --mDialogCount;
}

void DialogManager::requestLogin()
{
    //Login 直接最顶层模态
    if (!mFunctionDialog){
        mFunctionDialog = new LoginDialog;
    }
    mFunctionDialog->setWindowModality(Qt::WindowModal);
    mFunctionDialog->exec();
    while (QDialog::Accepted != mFunctionDialog->result())
    {

        mFunctionDialog->exec();
    }
}

int DialogManager::requestAddAccount(QSqlTableModel* model) {
    AccountFormDialog dialog(nullptr, New);
    setTopWidget(&dialog);
    dialog.setWindowModality(Qt::WindowModal);
    dialog.setReferenceModel(model);
    int ret =  dialog.exec();
    releaseTopWidget(&dialog);
    return ret;
}

int DialogManager::requestEditSelfAccount() {
    AccountFormDialog dialog(nullptr, Self);
    setTopWidget(&dialog);
    dialog.setWindowModality(Qt::WindowModal);
    int ret =  dialog.exec();
    releaseTopWidget(&dialog);
    return ret;
}

int DialogManager::requestEditAdminAccount(const QMap<QString, QVariant>& values) {
    AccountFormDialog dialog(nullptr, Admin);
    setTopWidget(&dialog);
    dialog.setAccountInformation(values);
    dialog.setWindowModality(Qt::WindowModal);
    int ret =  dialog.exec();
    releaseTopWidget(&dialog);
    return ret;
}

void DialogManager::requestChangePassword() {
    ChangePasswordFormDialog dialog;
    setTopWidget(&dialog);
    dialog.setGeometry(dialog.parentWidget()->geometry());
    dialog.setWindowModality(Qt::WindowModal);
    dialog.exec();
    releaseTopWidget(&dialog);
}

//考虑以后使用另外的dialog显示错误
void DialogManager::raiseDeviceError(QObject *parent, QObject *msg) {
    clearMessageDialog();
    //new dialog
    auto dialog = new GUIMessageDialog;

    if (msg) {
        QString *str = (QString *) msg;
        dialog->showMessage(*str);
    } else {
        dialog->showMessage("Something went error!");
    }
    dialog->stopLoading();
    dialog->showExitButton();
    setTopWidget(dialog);
    dialog->setWindowModality(Qt::NonModal);
    dialog->exec();
    releaseTopWidget(dialog);
    dialog->deleteLater();
}

// 扫描过程 dialog 只能为最底层，并且会被error dialog 清除！
void DialogManager::invokeOperationStart(QObject *parent, QObject *msg) {
    //没有目标parent 撤销操作
    if (!QApplication::activeWindow()) return;
    //只能在最底层窗口上模态
    if (mDialogCount>0) return;
    clearMessageDialog();
    mMessageDialog = new GUIMessageDialog(QApplication::activeWindow());
    if (msg)
    {
        QString* str = (QString*)msg;
        mMessageDialog->showMessage(*str);
    }
    else
    {
        mMessageDialog->hideMessage();
    }
    mMessageDialog->hideExitButton();
    mMessageDialog->startLoading();
    AppGlobalValues::setInProcessing(true);
    if (mMessageDialog->isHidden())
    {
        mMessageDialog->open();
    }
}

void DialogManager::invokeOperationProgress(QObject *parent, QObject *msg) {
    //窗口不存在，撤销操作
    if (!mMessageDialog) return;
    if (msg)
    {
        QVariant* var = (QVariant*)msg;
        if (mMessageDialog->Pending())
        {
            mMessageDialog->stopPending();
        }
        mMessageDialog->showMessage(var->toString());
    }
    else
    {
        mMessageDialog->hideMessage();
    }
    if (mMessageDialog->isHidden())
    {
        mMessageDialog->show();
    }
}

void DialogManager::invokeOperationPending(QObject *parent, QObject *msg) {
    //窗口不存在，撤销操作
    if (!mMessageDialog) return;
    if (!mMessageDialog->Pending())
    {
        mMessageDialog->startPending();
        QVariant* var = (QVariant*)msg;
        mMessageDialog->showMessage(var->toString());
    }
}

void DialogManager::invokeOperationEnd(QObject *parent, QObject *msg) {
    //窗口不存在，撤销操作
    if (!mMessageDialog) return;
    if (!mMessageDialog->isHidden())
    {
        if (msg && ((QVariant*)msg)->toBool())
        {
            mMessageDialog->stopLoading();
            mMessageDialog->showMessage("Scan completed!");
            mMessageDialog->showExitButton();
            mMessageDialog->setWindowModality(Qt::WindowModal);
            mMessageDialog->exec();
        }
        else
        {
            mMessageDialog->accept();
        }
        delete mMessageDialog;
        mMessageDialog = nullptr;
        AppGlobalValues::setInProcessing(false);
    }
}

void DialogManager::clearMessageDialog() {
    if (mMessageDialog){
        if (!mMessageDialog->isHidden()) mMessageDialog->hide();
        delete mMessageDialog;
        mMessageDialog = nullptr;
    }
}

DialogManager::~DialogManager() {
    clearMessageDialog();
}