#pragma once

#include "atlas.h"
#include "cglm/types.h"
#include "freetype/freetype.h"
#include "hash.h"
#include "sokol_gfx.h"
#include "utils.h"

struct text_vertex_s {
  vec2 pos;
  vec2 uv;
};

typedef u32 codepoint_t;

enum font_context_error_e : u8 {
  FONT_CONTEXT_ERROR_NONE = 0,
  FONT_CONTEXT_ERROR_LOAD_LIBRARY,
  FONT_CONTEXT_ERROR_CREATE_SAMPLER,
  FONT_CONTEXT_ERROR_CREATE_SHADER,
  FONT_CONTEXT_ERROR_CREATE_PIPELINE,
};

struct font_context_s {
  FT_Library ft;
  struct sg_pipeline pipeline;
  struct sg_sampler sampler;
};

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

struct glyph_s {
  vec2 uv0, uv1;
  vec2 bearing;
  f32 advance;
};

enum font_error_e : u8 {
  FONT_ERROR_NONE = 0,
  FONT_ERROR_LOAD_FACE,
  FONT_ERROR_ATLAS_FAILED,
  FONT_ERROR_LOAD_GLYPH,
};

struct font_s {
  struct font_context_s* context;
  FT_Face face;

  struct atlas_s atlas;
  struct hashmap_s<codepoint_t, struct glyph_s> cached;
};

enum font_error_e wayc_font_init(struct font_s* font,
                                 struct font_context_s* context,
                                 const char* path, u32 font_size,
                                 u32 atlas_width, u32 atlas_height);

enum font_error_e wayc_font_raster(struct font_s* font, codepoint_t codepoint,
                                   struct glyph_s* glyph);

static inline enum font_error_e wayc_font_flush(struct font_s* font) {
  enum atlas_error_e atlas_err = wayc_atlas_flush(&font->atlas);
  return (enum font_error_e)wayc_max(atlas_err, FONT_ERROR_NONE);
}

enum font_error_e wayc_font_raster_text(struct font_s* font, const char* text,
                                        usize text_len, struct glyph_s* glyphs,
                                        usize max_glyphs);

void wayc_font_deinit(struct font_s* font);

struct text_mesh_s {
  struct text_vertex_s* vertices;
  usize vertex_count;
  u16* indices;
  usize index_count;
};

bool wayc_text_mesh_init(struct text_mesh_s* mesh, const char* text,
                         usize text_len, struct font_s* font);
void wayc_text_mesh_deinit(struct text_mesh_s* mesh);