#pragma once

#define _XOPEN_SOURCE   600
#define _POSIX_C_SOURCE 200112L
#include <stdint.h>
#include <stdbool.h>
#include <pthread.h>

typedef struct {
    uint16_t width;
    uint16_t height;
    uint8_t image_count; // amount of frames in flight
    uint8_t image_front; // image being drawn to screen
    uint8_t image_recent; // last image that finished drawing
    uint8_t image_current; // current image being drawn
    pthread_mutex_t lock;
    uint32_t** images;
} Swapchain;

void swapchain_next(Swapchain* swapchain);
void swapchain_submit(Swapchain* swapchain);

struct Screen {
    Swapchain swapchain;
    float delta;
    void* internal;
};

#define Screen struct Screen

#define KEY_W       25
#define KEY_A       38
#define KEY_S       39
#define KEY_D       40
#define KEY_UP      111
#define KEY_DOWN    116
#define KEY_LEFT    113
#define KEY_RIGHT   114
#define KEY_MINUS   20
#define KEY_EQUALS  21
#define KEY_ESC     9

void init_screen(Screen* screen, uint16_t width, uint16_t height, const char* title, uint16_t update_rate);
bool poll_screen(Screen* screen);
void free_screen(Screen* screen);

bool key_pressed(int keycode);
bool key_down(int keycode);