#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QTest>
#include<QAction>
#include<QMenuBar>
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{

    ui->setupUi(this);
    resize(800,500);

    dir=1;
    connect(ui->menuBar,SIGNAL(triggered(QAction*)),this,SLOT(Triggering(QAction*)));
    connect(ui->startbtn,&QPushButton::clicked,
            this,&MainWindow::TG);
    connect(ui->pausebtn,&QPushButton::clicked,
            this,&MainWindow::Stopgame);
    connect(ui->jixubtn,&QPushButton::clicked,
            this,&MainWindow::Continuegame);
//    connect(ui->closebtn,&QPushButton::clicked,[=](){
//                 this->close();
//         });
    connect(ui->closebtn,&QPushButton::clicked,
            this,&MainWindow::Closegame);
}

MainWindow::~MainWindow()
{
    delete ui;
}
void MainWindow::Stopgame(){
    flage=0;
}
void MainWindow::Continuegame(){
flage=1;

int ms=300;

while(flage){
    snake->move(dir,this);

    if(snake->shead->getPos() == food->getPos()){
        delete food;
        food=new SnakeNode(this,(qrand()%50)*10,(qrand()%50)*10);
        snake->eat(dir,this);
    }
    QPoint pos;
    pos=snake->shead->getPos();
    if(pos.x()<0 || pos.x()>500 || pos.y()<0 || pos.y()>500){
        QMessageBox::critical(this,"游戏结束","跑出边界了！");
//                    snake->DeleteTaill();
        break;

        //exit(1);
    }
    if(!snake->Check()){
        QMessageBox::critical(this,"游戏结束","吃到自己了！");
        //exit(2);
    }

    QTest::qWait(ms);
}
}
void MainWindow::Closegame(){
    this->close();
}

void MainWindow::TG(){

    gamework();
}
void MainWindow::gamework(){
    food=new SnakeNode(this,(qrand()%50)*10,(qrand()%50)*10);
            snake = new SnakeDialog(this);
            int ms=300;

            while(flage){
                snake->move(dir,this);

                if(snake->shead->getPos() == food->getPos()){
                    delete food;
                    food=new SnakeNode(this,(qrand()%50)*10,(qrand()%50)*10);
                    snake->eat(dir,this);
                }
                QPoint pos;
                pos=snake->shead->getPos();
                if(pos.x()<0 || pos.x()>500 || pos.y()<0 || pos.y()>500){
                    QMessageBox::critical(this,"游戏结束","跑出边界了！");
//                    snake->DeleteTaill();
                    break;

                    //exit(1);
                }
                if(!snake->Check()){
                    QMessageBox::critical(this,"游戏结束","吃到自己了！");
                    //exit(2);
                }

                QTest::qWait(ms);
            }
}

void MainWindow::Triggering(QAction *ac){

    if(ui->startaction_2 == ac){
            gamework();
    }
}
void MainWindow::paintEvent(QPaintEvent *painevt){
    QPainter paint(this);
    paint.setPen(Qt::blue);
    paint.drawLine(10,0,10,500);
    for(int i=0;i<=500;i+=10){
        paint.drawLine(0,i+10,510,i+10);
        paint.drawLine(i+10,0,i+10,510);
    }
}

void MainWindow::keyPressEvent(QKeyEvent* key){
    predir=dir;

    switch(key->key()){
    case Qt::Key_W:
        dir=1;
        if(2==predir){
            dir=predir;
            return ;
        }
        break;
    case Qt::Key_S:
        dir=2;
        if(1==predir){
            dir=predir;
            return ;
        }
        break;
    case Qt::Key_A:
        dir=3;
        if(4==predir){
            dir=predir;
            return ;
        }
        break;
    case Qt::Key_D:
        dir=4;
        if(3==predir){
            dir=predir;
            return ;
        }
        break;
    }
    snake->move(dir,this);

    if(snake->shead->getPos() == food->getPos()){
        delete food;
        food=new SnakeNode(this,(qrand()%50)*10,(qrand()%50)*10);
        snake->eat(dir,this);
    }
}