#pragma once

#include "cglm/types.h"
#include "freetype/freetype.h"
#include "hash.h"
#include "rendering.h"
#include "utils.h"

typedef u32 codepoint_t;

#define WAYC_LETTER_NTRIANGLES 2
#define WAYC_LETTER_NVERTICES (WAYC_LETTER_NTRIANGLES * WAYC_TRIANGLE_NVERTS)

struct text_vertex_s {
  vec2 pos;
  vec2 uv;
};

enum font_context_error_e {
  FONT_CONTEXT_ERROR_NONE,
  FONT_CONTEXT_ERROR_LIBRARY_LOADING,
  FONT_CONTEXT_ERROR_VAO_CREATION,
};

struct font_context_s {
  FT_Library library;
};

enum font_context_error_e wayc_font_context_init(struct font_context_s* ctx);
void wayc_font_context_deinit(struct font_context_s* ctx);

struct glyph_s {
  ivec2 uv0, uv1;

  i32 bearing_x, bearing_y;
  f32 advance;
};

enum font_error_e {
  FONT_ERROR_NONE,
  FONT_ERROR_FILE_LOAD,
  FONT_ERROR_FONT_LOAD,
  FONT_ERROR_NOT_MATCH,
  FONT_ERROR_ATLAS_FULL,
};

struct font_s {
  u8* data;
  FT_Face face;
  struct hashmap_s<codepoint_t, struct glyph_s> cache;
};

enum font_error_e wayc_font_init(struct font_s* font,
                                 struct font_context_s* ctx, u32 fsize,
                                 const char* path);
enum font_error_e wayc_font_lookup(struct font_s* font, struct atlas_s* atlas,
                                   struct atlas_packer_s* packer,
                                   codepoint_t codepoint, struct glyph_s* out);
void wayc_font_deinit(struct font_s* font);

enum text_error_e {
  TEXT_ERROR_NONE,
  TEXT_ERROR_ATLAS,
};

struct text_s {
  struct font_s* font;
  struct atlas_s* atlas;
  struct atlas_packer_s* packer;
  struct string_s string;
};

#define WAYC_TEXT_INIT(font, atlas, packer, string) \
  text_s { font, atlas, packer, string }

enum text_error_e wayc_text_vertices(struct text_s* text,
                                     struct text_vertex_s** out);