#include "include/lua.hpp"
#include <QWidget>
#include <QApplication>
#include <QFile>
#include <QDebug>

static int tolua_new_QWidget(lua_State* pState)
{
    QWidget* widget = new QWidget();
    tolua_pushusertype(pState, widget, "QWidget");
    return 1;
}

static int tolua_delete_QWidget(lua_State* pState)
{
    QWidget* widget = (QWidget* )tolua_tousertype(pState, 1, 0);
    if(NULL != widget)
    {
        widget->close();
        delete widget;
    }
    return 1;
}

static int tolua_Show_QWidget(lua_State* pState)
{
    QWidget* widget = (QWidget* )tolua_tousertype(pState, 1, 0);

    if(widget != NULL)
    {
        widget->show();
    }
    return 1;
}

static int tolua_Resize_QWidget(lua_State* pState)
{
    QWidget* widget = (QWidget* )tolua_tousertype(pState, 1, 0);
    double a = tolua_tonumber(pState, 2, 0);
    double b = tolua_tonumber(pState, 3, 0);
    qDebug() << a;
    qDebug() << b;

    if(widget)
    {
        widget->resize((int)a, (int)b);
    }
    return 1;
}

int main(int argc, char * argv[])
{
    Q_INIT_RESOURCE(resources);
    QApplication a(argc, argv);

    // 初始化Lua对象
    lua_State *lu = luaL_newstate();
    luaL_openlibs(lu);

    // 使用tolua对QWidget类进行“描述”
    tolua_open(lu);
    tolua_module(lu, NULL, 0);

    tolua_beginmodule(lu, NULL);
    tolua_usertype(lu, "QWidget");
    tolua_cclass(lu, "QWidget", "QWidget", "", tolua_delete_QWidget);

    tolua_beginmodule(lu, "QWidget");
    tolua_function(lu, "new", tolua_new_QWidget);
    tolua_function(lu, "show", tolua_Show_QWidget);
    tolua_function(lu, "resize", tolua_Resize_QWidget);
    tolua_endmodule(lu);

    tolua_endmodule(lu);

    // 读取资源文件
    QFile file("://test.lua");
    file.open(QIODevice::ReadOnly | QIODevice::Text);

    // 注意，笔者使用的事UTF-8编码，如果是ANSI编码可以去掉这句
    QTextStream in(&file);
    in.setCodec("UTF-8");

    // 读取，并打印下来查看是否正确
    QString str = in.readAll();
    qDebug() << str;

    // Lua加载并执行脚本
    luaL_loadbuffer(lu, str.toLocal8Bit().data(), str.length(), "line");
    lua_pcall(lu, 0, 0, 0);

    return a.exec();
}

w = QWidget:new()
w:show()

w:resize(300,400)