#pragma once

#include <string>
#include <types/base/types.h>

namespace extra2d {

enum class PlatformType { Auto = 0, PC, Switch };

struct AppConfig {
    std::string title = "Extra2D Application";
    int width = 800;
    int height = 600;
    bool fullscreen = false;
    bool resizable = true;
    bool vsync = true;
    int fpsLimit = 0;
    int msaaSamples = 0;
    PlatformType platform = PlatformType::Auto;
    bool enableCursors = true;
    bool enableDpiScale = false;
};

/**
 * @brief 应用程序主控类
 * 
 * 管理应用程序生命周期、窗口和主循环
 */
class Application {
public:
    static Application& instance();

    Application(const Application&) = delete;
    Application& operator=(const Application&) = delete;

    bool init(const AppConfig& config);
    void shutdown();
    void run();
    void quit();

    void pause();
    void resume();
    bool isPaused() const { return paused_; }
    bool isRunning() const { return running_; }

    float deltaTime() const { return deltaTime_; }
    float totalTime() const { return totalTime_; }
    int fps() const { return currentFps_; }

    const AppConfig& getConfig() const { return config_; }

private:
    Application() = default;
    ~Application();

    void mainLoop();
    void update();

    AppConfig config_;

    bool initialized_ = false;
    bool running_ = false;
    bool paused_ = false;
    bool shouldQuit_ = false;

    float deltaTime_ = 0.0f;
    float totalTime_ = 0.0f;
    double lastFrameTime_ = 0.0;
    int frameCount_ = 0;
    float fpsTimer_ = 0.0f;
    int currentFps_ = 0;
};

#define APP extra2d::Application::instance()

} // namespace extra2d