#ifndef VOXULA_WINDOW_H
#define VOXULA_WINDOW_H

#include <stdint.h>
#include <threads.h>

#include <SDL2/SDL.h>
#include <voxula/internals/utility.h>

typedef struct vx_input_controller vx_input_controller_s;
typedef struct vx_window vx_window_s;
typedef struct vx_window_event vx_window_event_s;

typedef enum
{
    VX_WINDOW_EVENT_INVALID = 0,

    VX_WINDOW_EVENT_KEY_PRESS,
    VX_WINDOW_EVENT_KEY_RELEASE,

    VX_WINDOW_EVENT_MOUSE_PRESS,
    VX_WINDOW_EVENT_MOUSE_RELEASE,
    VX_WINDOW_EVENT_MOUSE_MOVE,
    VX_WINDOW_EVENT_MOUSE_SCROLL,

    VX_WINDOW_EVENT_CLOSE = 254,
    VX_WINDOW_EVENT_QUIT = 255

} vx_window_event_e;

typedef enum
{
    VX_KEY_MODIFIER_NONE = 0,

    VX_KEY_MODIFIER_LEFT_CONTROL = 1,
    VX_KEY_MODIFIER_RIGHT_CONTROL = 1 << 1,
    VX_KEY_MODIFIER_CONTROL = 1 | (1 << 1),

    VX_KEY_MODIFIER_LEFT_SHIFT = 1 << 2,
    VX_KEY_MODIFIER_RIGHT_SHIFT = 1 << 3,
    VX_KEY_MODIFIER_SHIFT = (1 << 2) | (1 << 3)

} vx_key_modifier_e;

struct vx_window_event
{
    vx_window_event_e type;
    vx_window_s *association;

    union vx_window_event_union
    {
        struct vx_key_press
        {
            uint16_t modifiers;
            uint32_t character;
        } key_press;

        struct vx_key_release
        {
            uint16_t modifiers;
            uint32_t character;
        } key_release;

        struct vx_mouse_press
        {
            vx_vec2f_s position_change;
        } mouse_press;

        struct vx_mouse_release
        {
            vx_vec2f_s position;
        } mouse_release;

        struct vx_mouse_move
        {
            vx_vec2f_s position;
        } mouse_move;

        struct vx_mouse_scroll
        {
            float amount;
        } mouse_scroll;
    } specifics;
};

struct vx_window
{
    vx_input_controller_s *controller;
    SDL_Window *window;
    SDL_GLContext gl_context;
    void (*fn_handle_input)(vx_window_s *window, vx_window_event_s event);
    void *userdata;
};

struct vx_input_controller
{
    uint32_t window_list_capacity;
    uint32_t num_windows;
    vx_window_s **windows;

    bool running;
    thrd_t thread;
};

vx_input_controller_s * vx_new_input_controller();
void vx_free_input_controller(vx_input_controller_s *controller);

void vx_start_input_controller(vx_input_controller_s *controller);
void vx_stop_input_controller(vx_input_controller_s *controller);

vx_window_s * vx_new_window(vx_input_controller_s *controller);
void vx_free_window(vx_window_s *window);

void vx_win_set_title(vx_window_s *window, const char *title);
void vx_win_resize(vx_window_s *window, vx_vec2u_s size);
void vx_win_move(vx_window_s *window, vx_vec2i_s position);
void vx_win_show(vx_window_s *window);
void vx_win_hide(vx_window_s *window);
void vx_win_present(vx_window_s *window);

#endif // VOXULA_WINDOW_H