#include "login.h"
#include "ui_login.h"

Login::Login(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::Login)
{
    /**********ui_init**********/
    ui->setupUi(this);
    this->setWindowIcon(QIcon(":/icon.png"));
    this->setTabOrder(ui->lineEdit_username,ui->lineEdit_password);
    this->setTabOrder(ui->lineEdit_password,ui->btn_signin);
    this->setWindowFlags(Qt::FramelessWindowHint); //无边框
    this->setAttribute(Qt::WA_TranslucentBackground);
    new_closebutton(ui->close_btn,":/close.png", QSize(30, 30));
    ui->btn_signin->installEventFilter(this);

    /********datamanager********/
    datamanager = DataManager::getInstance();
    connect(datamanager,&DataManager::signin_response,this,&Login::signin_response);
    connect(datamanager,&DataManager::signup_response,this,&Login::signup_response);
    connect(datamanager,&DataManager::connect_to_server,this,&Login::connected);
    connect(datamanager,&DataManager::disconnect_from_server,this,&Login::disconnected);
    connect(this,&Login::signin_request,datamanager,&DataManager::signin_request);
    connect(this,&Login::Register,datamanager,&DataManager::Register);

}

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

/**************************************QEvent*************************************/
void Login::paintEvent(QPaintEvent *event)
{
    //创建画家，指定绘图设备
    // QPainter painter(this);
    //创建QPixmap对象
    // QPixmap pix;
    //加载图片
    // pix.load(":/sources/xxx.png");
    //绘制背景图
    // painter.drawPixmap(0,0,this->width(),this->height(),pix);

    //绘制样式
    // QBitmap bmp(this->size());
    // bmp.fill();
    // QPainter painter(&bmp);
    // painter.setPen(Qt::NoPen);
    // painter.setBrush(Qt::black);
    // painter.setRenderHint(QPainter::Antialiasing);
    // painter.drawRoundedRect(bmp.rect(), 6, 6);
    // setMask(bmp);

    QPixmap pix;
    pix.load(":/background.png");

    QPainter painter(this);
    painter.setRenderHint(QPainter::Antialiasing); // 反锯齿;

    painter.setPen(Qt::transparent);
    QRect rect = this->rect(); // rect为绘制大小
    rect.setWidth(rect.width() - 1);
    rect.setHeight(rect.height() - 1);
    painter.drawRoundedRect(rect, 10, 10); // 10为圆角角度
    painter.drawPixmap(rect, pix);         //绘制背景图

    // painter.setBrush(QBrush(QColor(255,245,225,240)));
    // painter.setPen(Qt::transparent);
    //也可用QPainterPath 绘制代替 painter.drawRoundedRect(rect, 15, 15);
    // QPainterPath painterPath;
    // painterPath.addRoundedRect(rect, 15, 15);//15为圆角角度
    // painter.drawPath(painterPath);

    //设置阴影
    QGraphicsDropShadowEffect *shadow = new QGraphicsDropShadowEffect(this);
    shadow->setOffset(0, 0);             //设置阴影距离
    shadow->setColor(QColor("#87CEFA")); //设置阴影颜色
    shadow->setBlurRadius(10);           //设置阴影圆角
    ui->btn_signin->setGraphicsEffect(shadow);
    ui->btn_signup->setGraphicsEffect(shadow);
}

void Login::mousePressEvent(QMouseEvent *event)
{
    if (event->buttons() == Qt::LeftButton)
    {
        point = event->pos();
    }
}

void Login::mouseMoveEvent(QMouseEvent *event)
{
    if (event->buttons() == Qt::LeftButton)
    {
        //当窗口最大化或最小化时也不进行触发
        if (Login::isMaximized() || Login::isMinimized())
        {
            return;
        }
        else
        {
            //当在按钮之类需要鼠标操作的地方不进行触发(防误触)
            if (ui->btn_signin->underMouse() || ui->btn_signup->underMouse())
            {
                return;
            }
            else
            {
                Login::move(Login::mapToGlobal(event->pos() - point));
            }
        }
    }
    event->accept();
}


/***************************************SLOTS************************************/
void Login::on_btn_signin_clicked()
{
    this->zoom_down(ui->btn_signin);
    this->zoom_up(ui->btn_signin);
    if(connect_flag == true)
    {
        user = ui->lineEdit_username->text();
        passwd = ui->lineEdit_password->text();
        if(user.isEmpty() || passwd.isEmpty())
        {
            QMessageBox::warning(this,tr("错误"),tr("用户名和密码不能为空！"));
            return;
        }
        emit signin_request(user,passwd);
    }
    else
    {
        QMessageBox::warning(this, "登录失败", "尚未连接服务器！");
        return;
    }
}

void Login::on_btn_signup_clicked()
{
    this->zoom_down(ui->btn_signup);
    this->zoom_up(ui->btn_signup);
    signup = new Signup();
    connect(signup,&Signup::show_login_ui,this,&Login::show_login_ui);
    connect(signup,&Signup::Register,this,&Login::slot_Register);
    this->hide();
    signup->show();
}

void Login::on_close_btn_clicked()
{
    this->close();
}

void Login::show_login_ui()
{
    this->show();
}

//等待服务器验证登陆数据
void Login::signin_response(bool result)
{
    if(result == true)
    {
        mainwidget = new MainWidget(user);
        connect(mainwidget,&MainWidget::send_text,datamanager,&DataManager::send_text);
        connect(mainwidget,&MainWidget::send_to_user,datamanager,&DataManager::send_to_user);
        connect(mainwidget,&MainWidget::send_file_private,datamanager,&DataManager::send_file_private);
        connect(mainwidget,&MainWidget::send_file_to_all,datamanager,&DataManager::send_file_to_all);
        connect(mainwidget,&MainWidget::account_cancellation,datamanager,&DataManager::account_cancellation);
        connect(mainwidget,&MainWidget::update_namelist,datamanager,&DataManager::update_namelist);
        connect(datamanager,&DataManager::update_text,mainwidget,&MainWidget::update_text);
        connect(datamanager,&DataManager::update_file,mainwidget,&MainWidget::update_file);
        connect(datamanager,&DataManager::update_file_private,mainwidget,&MainWidget::update_file_private);
        connect(datamanager,&DataManager::update_users,mainwidget,&MainWidget::update_users);
        connect(mainwidget,&MainWidget::exit_client,this,&Login::exit_client);
        this->hide();
        mainwidget->show();
    }
    else
    {
        QMessageBox::warning(this,tr("登录失败"),tr("用户名或密码错误！"));
    }
}

//等待服务器注册数据
void Login::signup_response(bool result)
{
    if(result == true)
    {
        QString information = QString("请妥善保存您的用户名和密码！");
        QMessageBox::information(signup,tr("注册成功"),information);
        signup->close();
        this->show();

    }
    else
    {
        QMessageBox::warning(signup,tr("错误"),tr("注册失败，请重试！"));
    }
}

//注册界面按下注册按键
void Login::slot_Register(QString username,QString password)
{
    if(connect_flag == false)
    {
        QMessageBox::warning(signup, "注册失败", "尚未连接服务器！请连接服务器后重试");
        return;
    }
    emit Register(username,password);
}

//连接上服务器
void Login::connected()
{
    qDebug() << "connect to server";
    connect_flag = true;
}

//未连上服务器或服务器断开
void Login::disconnected()
{
    qDebug() << "disconnect from server";
    connect_flag = false;
}

void Login::exit_client()
{
    this->close();
}

/************************************private functions************************************/
void Login::zoom_down(QPushButton* btn)
{
    QPropertyAnimation *animalton = new QPropertyAnimation(btn,"geometry");
    //设置间隔时间
    animalton->setDuration(200);
    //设置起始位置
    animalton->setStartValue(QRect(btn->x(),btn->y(),btn->width(),btn->height()));
    //设置结束位置
    animalton->setEndValue(QRect(btn->x(),btn->y()+5,btn->width(),btn->height()));
    //设置动画曲线
    animalton->setEasingCurve(QEasingCurve::OutBounce);
    animalton->start();

}

void Login::zoom_up(QPushButton* btn)
{
    QPropertyAnimation *animalton = new QPropertyAnimation(btn,"geometry");
    animalton->setDuration(200);
    animalton->setStartValue(QRect(btn->x(),btn->y()+5,btn->width(),btn->height()));
    animalton->setEndValue(QRect(btn->x(),btn->y(),btn->width(),btn->height()));
    animalton->setEasingCurve(QEasingCurve::OutBounce);
    animalton->start();
}

void Login::new_closebutton(QPushButton* btn, QString position,QSize size)
{
    QPixmap pixmap;
    pixmap.load(position);
    btn->setIconSize(size);
    btn->setStyleSheet("QPushButton{border-width: 1px;border-style: solid;border-radius:15px;background-color: rgb(64, 145, 252);}"
                       "QPushButton:hover{background-color:#999999;}");
    //设置图标
    btn->setIcon(pixmap);
}

bool Login::eventFilter(QObject *target, QEvent *event)
{
    if(target == ui->btn_signin)		//可替换
        {
            if(event->type() == QEvent::KeyPress)//回车键
            {
                 QKeyEvent *k = static_cast<QKeyEvent *>(event);

                 if(k->key() == Qt::Key_Return || k->key() == Qt::Key_Enter)
                 {
                     on_btn_signin_clicked();		//替换为需要响应的函数事件，以这里的按钮为例
                     return true;
                 }
            }
        }
        return QWidget::eventFilter(target,event);
}