#ifndef TEENSY_H_
#define TEENSY_H_

#include <limits.h>

#include "teensy_common.h"
#include "teensy_context.h"
#include "teensy_list.h"

#define ty_vec2(x, y)     ((struct ty_vec2){x, y})
#define ty_vec2i(x, y)    ((struct ty_vec2i){x, y})
#define ty_color(R, G, B) ((struct ty_color){R, G, B})
#define ty_img_full(img)  ((struct ty_recti){0, 0, (img).width, (img).height})

#define TY_COLOR_BLACK   ty_color(0,   0,   0  )
#define TY_COLOR_RED     ty_color(255, 0,   0  )
#define TY_COLOR_GREEN   ty_color(0,   255, 0  )
#define TY_COLOR_YELLOW  ty_color(255, 255, 0  )
#define TY_COLOR_BLUE    ty_color(0,   0,   255)
#define TY_COLOR_MAGENTA ty_color(255, 0,   255)
#define TY_COLOR_CYAN    ty_color(0,   255, 255)
#define TY_COLOR_WHITE   ty_color(255, 255, 255)

struct ty_hints {
    int scr_width;
    int scr_height;
    const char *game_title;
    int ticrate;
};

struct ty_ctx {
    struct ty_hints hints;
    double ticrate;
    double prev_tic_ts;
};

struct ty_color {
    uint8_t r;
    uint8_t g;
    uint8_t b;
};

struct ty_vec2 {
    float x;
    float y;
};

struct ty_vec2i {
    int x;
    int y;
};

struct ty_rect {
    float x;
    float y;
    float w;
    float h;
};

struct ty_recti {
    int x;
    int y;
    int w;
    int h;
};

struct ty_image {
    struct ty_color *data;
    int width;
    int height;
};

struct ty_font {
    struct ty_image glyphs[CHAR_MAX];
};

struct ty_renderer {
    struct ty_image screen;
};

void ty_init(struct ty_hints hints);
void ty_deinit(void);

// Whether or not the main loop should continue executing.
bool ty_is_game_running(void);
// Gets the real time that the game has been running.
double ty_get_time(void);
// Handle events, tick game logic, etc. Returns the amount of times you should
// tic.
int ty_tick(void);

struct ty_image ty_create_image(int w, int h, const struct ty_color* data);
void ty_free_image(struct ty_image img);
struct ty_color ty_img_get_pixel(struct ty_image img, struct ty_vec2i pos);
void ty_img_set_pixel(
    struct ty_image img,
    struct ty_vec2i pos,
    struct ty_color color
);

void ty_font_add_glyph(struct ty_font *font, uint8_t c, struct ty_image img);
int ty_font_width(struct ty_font *font, const char *fmt, ...);

void ty_draw_clear(struct ty_color col);
void ty_draw_image(struct ty_image img, struct ty_vec2i pos);
void ty_draw_image_ex(
    struct ty_image img,
    struct ty_recti src,
    struct ty_recti dst
);
void ty_draw_image_rot(
    struct ty_image img,
    struct ty_vec2i pos,
    struct ty_vec2i offset,
    double rot
);
void ty_draw_rect(struct ty_recti rect, struct ty_color color);
void ty_draw_line(
    struct ty_vec2i start,
    struct ty_vec2i end,
    struct ty_color color
);
void ty_draw_text(struct ty_font *font, struct ty_vec2i pos, const char *text);
void ty_draw_text_fmt(
    struct ty_font *font,
    struct ty_vec2i pos,
    const char *fmt,
    ...
);
void ty_draw_end(void);

void ty_sleep(uint64_t ms);

#endif // TEENSY_H_