#include "InputObject.h"
#include "ui_InputObject.h"
#include "qdesktopwidget.h"
#include <QDebug>
#include <QKeyEvent>
#include <QComboBox>
#include <QDateEdit>
#include <QtVirtualKeyboard>



InputObject::InputObject(QWidget *parent) :
	QWidget(parent),
	ui(new Ui::InputObject)
{
	ui->setupUi(this);
	
	initUi();
	
	this->setVisible(false);
	this->setWindowFlags(Qt::Tool | Qt::FramelessWindowHint);


}

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

void InputObject::initUi() 
{

	QString style = "*{background-color:#3c3c3c; font-family:Arial; color:white;margin:0;font-size:16px;}"
		"QLabel#title{font-Size:98px;color:qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,"
		"stop: 0.0 darkgray, stop: 0.5 lightgray, stop: 1.0 darkgray);}"
		"QLabel#warn{color:#930000;background:transparent;font-size:20px;}"
		"QFrame#login_frame_username{min-width:700px;max-width:700px;max-height:500px;min-height:500px;"
		"border:1px solid #0078d8;border-radius:20px;"
		"background:qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,\n"
		"                          stop: 0.0 darkgray, stop: 0.5 gray, stop: 1.0 darkgray);"
		"}"

		
		"QLineEdit,QDateEdit{min-height:100px;max-height:100px; min-width:250px;max-width:250px;border: 3px solid pink; border-radius:10px;font-size:26px;}"
		"QLineEdit,QDateEdit:enabled{background-color: #515151}"
		"QDateEdit::up-button{image: url(:/up.png);height:15px;}"
		"QDateEdit::down-button{image:url(:/down.png);height:15px;}"
		;
	setStyleSheet(style);
	this->setWindowOpacity(0.8);

	ui->dateEdit->setVisible(false);
	ui->dateEdit->setMaximumDate(QDate::currentDate());
	ui->dateEdit->setDisplayFormat("yyyy/MM/dd");
	ui->dateEdit->setStyleSheet(style);

	//ui->lineEdit->setFont(QFont("Arial", 25));
	//ui->dateEdit->setFont(QFont("Arial", 25, QFont::Bold));
}


//QLineEdit* InputObject::lineEdit()
//{
//	return ui->lineEdit;
//}

bool InputObject::eventFilter(QObject *obj, QEvent *event)
{
	static bool _visible = false;
	static bool excution = false;

	if (obj->inherits("QQuickView"))
	{
		if (_visible != QGuiApplication::inputMethod()->isVisible())
		{

			if (QGuiApplication::inputMethod()->isVisible())
			{
				if (excution == false) {
					excution = true;
					//make sure vkb hide and show again,without activating InputObject(both show/hide)
					this->ShowPanel();
					excution = false;
				}
			}
			else
			{
				if (excution == false) {
					excution = true;
					//make sure will not give rise to another vkb
					this->HidePanel();
					excution = false;
				}
			}
			_visible = QGuiApplication::inputMethod()->isVisible();
		}
	}
	return QObject::eventFilter(obj, event);
}

void InputObject::ShowPanel() {
	if (qApp->focusWidget()->inherits("QLineEdit"))
	{
		curEdit = qobject_cast<QLineEdit*>(qApp->focusWidget());
		ui->dateEdit->setVisible(false);
		ui->lineEdit->setVisible(true);
	}
	else if (qApp->focusWidget()->inherits("QComboBox"))
	{
		curEdit = qobject_cast<QComboBox*>(qApp->focusWidget())->lineEdit();
		ui->dateEdit->setVisible(false);
		ui->lineEdit->setVisible(true);
	}
	else if(qApp->focusWidget()->inherits("QDateEdit"))
	{
		curDateEdit = qobject_cast<QDateEdit*>(qApp->focusWidget());
		ui->dateEdit->setVisible(true);
		ui->lineEdit->setVisible(false);
	}
	else
	{
		return;
	}
	QDesktopWidget w;
	int deskWidth = w.availableGeometry().width();
	int deskHeight = w.availableGeometry().height();
	int vkbHeight = QGuiApplication::inputMethod()->keyboardRectangle().height();
	this->setGeometry(0, 0, deskWidth, deskHeight - vkbHeight);
	this->setVisible(true);
	this->activateWindow(); //it is quite important!!!

	if (curEdit) {
		ui->lineEdit->setText(curEdit->text());
		ui->lineEdit->setEchoMode(curEdit->echoMode());
		ui->lineEdit->setInputMethodHints(Qt::InputMethodHint::ImhNoAutoUppercase);
		ui->lineEdit->setFocus();

		QEvent event(QEvent::RequestSoftwareInputPanel);
		QApplication::sendEvent(ui->lineEdit, &event);
	}
	if (curDateEdit) 
	{
		ui->dateEdit->setDateTime(curDateEdit->dateTime());
		ui->dateEdit->setFocus();
		QEvent event(QEvent::RequestSoftwareInputPanel);
		QApplication::sendEvent(ui->dateEdit, &event);
	}


}


void InputObject::HidePanel()
{
	if (curEdit) {
		curEdit->setText(ui->lineEdit->text());
		ui->lineEdit->clearFocus();
		ui->lineEdit->clear();
		this->setVisible(false);
		curEdit = nullptr;
	}
	else if (curDateEdit) 
	{
		curDateEdit->setDateTime(ui->dateEdit->dateTime());
		ui->dateEdit->clearFocus();
		ui->dateEdit->clear();
		this->setVisible(false);
		curDateEdit = nullptr;
	}
}