/*
 * @Descripttion: Api of gui in open source.
 * @Date: 2022-08-02 16:02:16
 * @LastEditTime: 2022-08-09 15:21:07
 */
#ifndef GUI_ENGINE_H
#define GUI_ENGINE_H
#include "ReturnCode.h"
#include <memory>
#define TR_TEXT(text) GuiEngine::GetInstance()->GetTranslateText(text)
#if 0
#define GUI_SET_IMAGE_FILE_SYSTEM_SRC(widget, src) widget->ImageSetSrc(&src); // use image src pointer.
#else
// #define GUI_SET_IMAGE_FILE_SYSTEM_SRC(widget, src) widget->ImageSetSrc("A:./"#src); // use image file.
#define GUI_SET_IMAGE_FILE_SYSTEM_SRC(widget, src) widget->ImageSetSrc(GUI_IMAGES_PATH#src); // use image file.
#endif
class Widget
{
public:
    Widget() = default;
    virtual ~Widget() {}
    // virtual bool IsValid() { return false; }
    // virtual std::string Name() { return "null"; }
    // virtual void SetWidget(Widget *p) {}
    // virtual int GetCoordX() { return 0; }
    // virtual int GetCoordY() { return 0; }
    virtual std::shared_ptr<Widget> NewImage(void) { return std::make_shared<Widget>(); }
    virtual std::shared_ptr<Widget> NewLabel(void) { return std::make_shared<Widget>(); }
    virtual void ImageSetSrc(const void *src) {}
    virtual void SetSize(const unsigned int &width, const unsigned int &height) {}
    virtual void Load(void) {}
    virtual void SetText(const char *text) {}
    virtual void Delete(void) {}
};
class Context
{
public:
    Context()
    {
        eventCallback = nullptr;
        ctx = nullptr;
        // cmd = KeyCmd::KEY_CMD_DEFAULT;
    }
    std::unique_ptr<Widget> widget;
    void (*eventCallback)(std::shared_ptr<Context> &ctx);
    bool (*timerCallback)(void *);
    // KeyCmd cmd;
    void *ctx;

public:
    virtual ~Context()
    {
    }
    virtual int Type() { return 0; }
    void WidgetReset(Widget *p)
    {
        widget.reset(p);
    }
};
template <typename T>
class ContextV2 : public Context
{
public:
    T data;

public:
    ContextV2(T value)
        : data(value)
    {
    }
    virtual ~ContextV2() = default;
};
class GuiEngine
{
public:
    GuiEngine() = default;
    virtual ~GuiEngine() = default;
    /**
     * @brief Get the Instance object
     * Return reference for runing faster. Usage : GuiEngine::GetInstance()->Init();
     * Don't use GuiEngine like this:
     * std::shared_ptr<GuiEngine> &log = GuiEngine::GetInstance();
     * or std::shared_ptr<GuiEngine> log = GuiEngine::GetInstance();
     * @param impl
     * @return std::shared_ptr<GuiEngine>&
     */
    static std::shared_ptr<GuiEngine> &GetInstance(std::shared_ptr<GuiEngine> *impl = nullptr)
    {
        static auto instance = std::make_shared<GuiEngine>();
        if (impl)
        {
            /**
             * @brief
             * The non-thread-safe changing is only for gtest.
             */
            instance = *impl;
        }
        return instance;
    }
    /**
     * @brief
     *
     * @param width width of screen
     * @param height height of screen
     * @param appInit for app to init the first window
     */
    virtual bool Init(const unsigned int &width, const unsigned int &height, void (*appInit)()) { return false; }
    virtual void UnInit() {}
    virtual const char *GetTranslateText(const char *trText) { return "nullptr"; }
    virtual std::shared_ptr<Widget> NewWidget(void) { return std::make_shared<Widget>(); }
    virtual std::shared_ptr<Widget> NewPage(void) { return std::make_shared<Widget>(); }
    virtual std::shared_ptr<Widget> NewImage(const std::shared_ptr<Widget> &parent) { return std::make_shared<Widget>(); }
    // virtual std::shared_ptr<Widget> PageOpen(const std::string &windowName) { return std::make_shared<Widget>(); }
    // virtual SF_CODE_S PageColse(const std::shared_ptr<Widget> &page) { return CreateReturnCode(SF_CODE_OK); }
    virtual void IdleQueue(const std::shared_ptr<Context> &ctx) {}
};
bool CreateGuiEngineImpl();
#endif