#include "mainwindow.h"
#include "ui_mainwindow.h"
#include<QtDebug>
MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    InitUI();
}

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

void MainWindow::InitUI()
{
    //定义期盼的大小
    this->resize((::CHESS_C + 1) * ::MAX_X, (::CHESS_R + 1) * ::MAX_Y);
    //锁定边框大小
    this->setMaximumSize((::CHESS_C + 1) * ::MAX_X, (::CHESS_R + 1) * ::MAX_Y);
    this->setMinimumSize((::CHESS_C + 1) * ::MAX_X, (::CHESS_R + 1) * ::MAX_Y);
    this->setWindowTitle("五子棋小游戏-逝水无痕");
    b_black = false;
}

void MainWindow::paintEvent(QPaintEvent *event)
{
    DraChessBoard();
    DrawHandChess();
    DrawChessItem();
    //强制更新界面
    update();
}

//画棋盘
void MainWindow::DraChessBoard()
{
    //绘图工具
    QPainter painter(this);
    //防止棋盘变形
    painter.setRenderHint(QPainter::Antialiasing,true);
    //给边框线颜色和大小
    painter.setPen(QPen(QColor(Qt::black),2));
    //给棋盘格子颜色
    painter.setBrush(Qt::yellow);
    //便利回执期盼的所有的格子
    for (int i=0;i<::CHESS_C; i++ ) {
        for (int j=0;j<::CHESS_R; j++ ) {
            //绘制矩形（棋盘的格子）
            painter.drawRect((i+0.5) * ::MAX_X,(j+0.5)* ::MAX_Y,::MAX_X,::MAX_Y);
        }
    }
}
//画鼠标上的棋子
void MainWindow::DrawHandChess()
{
    QPainter painter(this);
    //给棋子边框绘制透明
    painter.setPen(QPen(QColor(Qt::transparent)));
    if(b_black)
    {
        painter.setBrush(Qt::black);
    }else
    {
        painter.setBrush(Qt::white);
    }
    //绘制
    painter.drawEllipse(mapFromGlobal(QCursor::pos()),::MAX_X/2,MAX_Y/2);
}
//处理棋子位置
void MainWindow::DrawChessAtPoint(QPainter &painter,QPoint &point)
{
    //获取棋子的摆放位置
    QPoint ptCenter((point.x()+0.5)*::MAX_X,(point.y()+0.5)*::MAX_Y);
    painter.drawEllipse(ptCenter,::MAX_X/2,::MAX_Y/2);
}
//判断五子是否连接
int MainWindow::CountNearItem(ChessItem item,QPoint pt)
{
    int nCount = 0;
    item._pt+=pt;
    bool flag = true;
    while(flag)
    {
        int m = nCount;
        for (int i =0;i < p_ChessItem.size() ;i++ )
        {
            if(p_ChessItem[i] == item){
                nCount++;
                item._pt += pt;
            }
        }
        if(m == nCount){
            flag = false;
        }

    }
    return nCount;
}
//点击事件
void MainWindow::mousePressEvent(QMouseEvent *event)
{
    //获取鼠标点击的位置d
    qDebug()<<event->pos()<<"\n";
    //定义点位
    QPoint pt;
    pt.setX((event->pos().x())/::MAX_X);
    pt.setY((event->pos().y())/::MAX_Y);
    //判断棋子是否存在
    for (int i =0;i < p_ChessItem.size() ;i++ )
    {
        //获取当前棋子样式赋值
         ChessItem item = p_ChessItem[i];
        if(item._pt == pt){
            return;
        }
    }
    //不存在则绘制并判断五子是否连接
    ChessItem item(pt,b_black);
    p_ChessItem.append(item);
    //统计四个点位是否连接
    int nLeft       = CountNearItem(item,QPoint(-1,0));
    int nLeftUp     = CountNearItem(item,QPoint(-1,-1));
    int nLeftDown   = CountNearItem(item,QPoint(-1,1));
    int nUp         = CountNearItem(item,QPoint(0,-1));
    int nDown       = CountNearItem(item,QPoint(0,1));
    int nRight      = CountNearItem(item,QPoint(1,0));
    int nRightUp    = CountNearItem(item,QPoint(1,-1));
    int nRightDown  = CountNearItem(item,QPoint(1,1));
    if(nLeft+nRight >= 4 ||
        nLeftUp + nRightDown >= 4 ||
        nUp +nDown >= 4 ||
        nRightUp + nLeftDown >= 4)
    {
        QString str = b_black?"Black win":"Wihte win";
        QMessageBox::information(NULL,"GAME OVER",str,QMessageBox::Yes);
        p_ChessItem.clear();
        return;
    }
    //设置颜色取反
    b_black = !b_black;
}
void MainWindow::DrawChessItem()
{
   QPainter painter(this);
   //给棋子边框绘制透明
   painter.setPen(QPen(QColor(Qt::transparent)));
//   painter.setBrush(Qt::black);
//   //绘制
//   painter.drawEllipse(65,65,::MAX_X,::MAX_Y);
   for (int i =0;i < p_ChessItem.size() ;i++ )
   {
       //获取当前棋子样式赋值
        ChessItem item = p_ChessItem[i];
        if(item._black)
        {
            painter.setBrush(Qt::black);
        }else
        {
            painter.setBrush(Qt::white);
        }
        DrawChessAtPoint(painter,item._pt);
   }
}