#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "tstring.h"

// #define DEFAULT_STRING_SIZE 32

// typedef struct __string {
//     char* Characters;
//     int Length;
//     int ByteCount;
//     int Capacity;
// } TString;

// int GetGlyphByteWidth(const char* glyph);
// void AppendGlyph(const char* glyph, TString* string);
// void GetCharByIndex(int index, char characters[8], const TString* string);
// TString* CreateString(void);

// const unsigned char First = 0x70;
// const unsigned char Teo = 0xE0;
// const unsigned char Three = 0xF0;
// const unsigned char Four = 0xF7;

int main(int argc, char** argv) {
    char glyph[10] = { 0 };
    char characters[8] = { 0 };

    int index = 2;
    TString* string = TStringCreate();
//0xF0 0xA0 0xBA 0x8C
    char* test = u8"\xE5\x87\x84";
    char* test2 = u8"\xE3\x81\x84";
    char* test4 = u8"\xF0\xA0\xBA\x8C";
    char* test5 = "B";
    char* test3 = " Just some\0 extra text";

    TStringAppendText(test, string);
    TStringAppendText(test2, string);
    TStringAppendText(test4, string);
    TStringAppendText(test5, string);

    //GetCharByIndex(index, characters, string);
    //GetCharByIndex(3, glyph, string);

    // printf("From string index %d: '%s' (string length is %d)\n", index, characters, string->Length);
    // printf("And one English character: '%s'\n", glyph);
    printf("Full string: '%s'\n", TStringGetString(string));

    //fgets(glyph, 10, stdin);

    //glyph[strlen(glyph) - 1] = 0;

    //printf("Width %d byte(s).\n", GetGlyphByteWidth(glyph));
}

// TString* CreateString(void) {
//     TString* string = malloc(sizeof(TString));

//     string->Characters = calloc(DEFAULT_STRING_SIZE, sizeof(char));

//     string->Capacity = DEFAULT_STRING_SIZE;
//     string->ByteCount = 0;
//     string->Length = 0;

//     return string;
// }

// void AppendGlyph(const char* glyph, TString* string) {
//     int length = strlen(glyph);

//     memcpy(&string->Characters[string->ByteCount], glyph, length);

//     string->ByteCount += length;
//     string->Length++;
// }

// void GetCharByIndex(int index, char characters[8], const TString* string) {
//     int glyphCount = 0;

//     for(int i = 0; i < string->ByteCount;) {
//         if (glyphCount == index) {
//             memcpy(characters, &string->Characters[i], GetGlyphByteWidth(&string->Characters[i]));
//             return;
//         }

//         glyphCount++;
//         i += GetGlyphByteWidth(&string->Characters[i]);
//     }
// }

// int GetGlyphByteWidth(const char* glyph) {
//     printf("Bytes for '%s': ", glyph);
    
//     for(size_t i = 0; i < strlen(glyph); i++) {
//         printf("%02X ", 0xFF & glyph[i]);
//     }
//     printf("\n");

//     unsigned char result = *glyph & 0xFF;

//     if ((*glyph & 0x80) == 0) {
//         return 1;
//     }
//     else if ((*glyph & 0xE0) == 0xC0) {
//         return 2;
//     }
//     else if ((*glyph & 0xF0) == 0xE0) {
//         return 3;
//     }
//     else if ((*glyph & 0xF8) == 0xF0) {
//         return 4;
//     }

//     fprintf(stderr, "Failed to get glyph %02X\n", 0xFF & *glyph);

//     exit(-1);
// }