#ifndef PLATFORM_H
#define PLATFORM_H

#include "../core.h"

typedef struct OS_Input OS_Input;
struct OS_Input {
    struct {
        bool escape;
        bool enter;
        bool space;
        bool lshift;
        bool x;
        bool y;
        bool z;
        bool w;
    } keyboard;
    struct {
        union {
            struct {
                real32 x;
                real32 y;
            };
            Vec2 point;
        };
        struct {
            real64 dX;
            real64 dY;
        } scroll;
        bool btnLeft;
        bool btnRight;
        bool btnMiddle;
    } mouse;
};

enum OS_WindowEventKind {
    OS_WindowEventKind_Resize,

    // ---
    OS_WindowEventKind_Count,
};

typedef struct OS_WindowEvent OS_WindowEvent;
struct OS_WindowEvent {
    enum OS_WindowEventKind kind;
    union {
        struct {
            int32 width;
            int32 height;
        } resize;
    };
};

struct OS_Window;
typedef void (*OS_WindowEventCallback)(OS_WindowEvent *e, struct OS_Window *userData);

typedef struct OS_WindowInitParams OS_WindowInitParams;
struct OS_WindowInitParams {
    string name;
    int32 width;
    int32 height;
    void *data;
    OS_WindowEventCallback eventHandler;
};

typedef struct OS_Window OS_Window;
struct OS_Window {
    void *handle;
    int32 width;
    int32 height;
    real64 fps;
    void *userData;
    void *platformData;
    struct {
        real64 start;
        real64 fps;
    } frame;
};


DefineResult(OS_Window*, OS_WindowInit);
OS_WindowInitResult os_windowInit(Arena *arena, OS_WindowInitParams params);
bool os_windowShouldClose(OS_Window *window);
void os_windowProcessEvents(OS_Window *window);
void os_windowGetInput(OS_Window *window, OS_Input *input);
void os_windowSwapBuffers(OS_Window *window);
void os_windowFrameBegin(OS_Window *window);
void os_windowFrameEnd(OS_Window *window);
void os_windowTerminate(OS_Window *window);

#endif