#include "font.h"
#include "utf8.h"
#include "progmem.h"
#include <stdint.h>

union utf_lookup {
    const char symbol[4];
    /// symbol as uint, but not decoded - just for matching!
    const uint32_t uint;
};

struct utf_glyph5x {
  union utf_lookup utf;
  font5x_bitmap_t graphic;
};

struct utf_glyph4x {
  union utf_lookup utf;
  font4x_bitmap_t graphic;
};

struct utf_glyph3x {
  union utf_lookup utf;
  font3x_bitmap_t graphic;
};


#include "font_35.inc.c"
#include "font_45.inc.c"
#include "font_57.inc.c"


#define ASCII_START 0x20
#define ASCII_END 0x7e

#define FONT_GETSYM_IMPL(rettype, symtype, fontname) \
    const rettype *fontname##_getsym(const struct Utf8Char *ch) { \
        const uint8_t byte0 = ch->bytes[0]; \
        if (byte0 < ASCII_START) { \
            goto fail; \
        } \
        if (byte0 <= ASCII_END) { \
            return &fontname##_ascii[byte0 - ASCII_START]; \
        } \
        for (uint8_t i = 0; i < sizeof(fontname##_extra) / sizeof(fontname##_extra[0]); i++) { \
            const struct symtype *sym = &fontname##_extra[i]; \
            const uint32_t table_ch = pgm_read_dword(&sym->utf.uint); \
            if (table_ch == ch->uint) { \
                return &sym->graphic; \
            } \
        } \
    fail: return &fontname ## _extra[0].graphic;  \
    }


FONT_GETSYM_IMPL(font5x_bitmap_t, utf_glyph5x, font57)
FONT_GETSYM_IMPL(font4x_bitmap_t, utf_glyph4x, font45)
FONT_GETSYM_IMPL(font3x_bitmap_t, utf_glyph3x, font35)


#if 0
const font5x_bitmap_t *font57_getsym(const struct Utf8Char *ch)
{
    const uint8_t byte0 = ch->bytes[0];
    if (byte0 < ASCII_START) {
        goto fail;
    }
    if (byte0 <= ASCII_END) {
        return &font57_ascii[byte0 - ASCII_START];
    }
    for (uint8_t i = 0; i < sizeof(font57_extra) / sizeof(font57_extra[0]); i++) {
        const struct utf_glyph5x *sym = &font57_extra[i];
        const uint32_t table_ch = pgm_read_dword(&sym->uint);
        if (table_ch == ch->uint) {
            return &sym->graphic;
        }
    }
fail:
    return &font57_extra[0].graphic; // replacement character
}
#endif