#include <stdio.h>
#include <conio.h>
#include <string.h>
#include <malloc.h>
#include <math.h>
typedef struct frame frame;
struct frame{
    char ftag;
    char tag[3];
    int size;
    char flag;
    char *data;
};
int main (int argc, char *argv[]){
    if (argc < 2) {
        printf("File error");
        return 0;
    }
    char file_name[36];
    strncpy(file_name, argv[1] + 11, strlen(argv[1] - 10));
    FILE *song = fopen (file_name, "rb");
    FILE *text = fopen ("ans.txt", "wb");
    fseek(song, 0, SEEK_END);
    long Size = ftell(song);
    fseek(song, 0, SEEK_SET);
    char * buffer = (char *) malloc(3);
    printf ("%d\n",sizeof(buffer));
    fread(buffer, 1, 3, song);
    if (strncmp(buffer, "ID3", 3) != 0) {
        printf("Non mp3 file");
        return 0;
    }
    buffer = (char *) malloc(1);
    printf ("%d\n",sizeof(buffer));
    int i = 3;
    fseek(song, 7, SEEK_CUR);
    if ( strncmp(argv[2],"--show", 6) == 0) {
        while (i < Size) {
            fread(buffer, 1, 1, song);
            if (strncmp(buffer, "T", 1) == 0) {
                frame inf;
                inf.ftag = "T";
                fread(inf.tag, 1, 3, song);
                buffer = (char *) malloc(4);
                printf ("%d\n",sizeof(buffer));
                char key[4];
                fread(key, 1, 100, song);
                printf ("here's buffer : %s\n", key);
                for (int j = 0; j < 4; j++)
                    inf.size |= key[3 - j] << j * 8;
                printf ("size : %d\n", inf.size);
                fread(buffer, 1, 2, song);
                inf.flag = buffer;
                printf("kek");
                inf.data = malloc(sizeof(char)* inf.size);
                printf ("LOL");
                fread(inf.data, 1, inf.size, song);
                i += inf.size + 10;
                printf("%c%s : %s\n",inf.ftag, inf.tag, inf.data);
            }
            else i++;
        }
    }
     /*   if (strncmp(buffer, "W", 1) == 0){

        };
        if (strncmp(buffer, "C", 1) == 0){

        };


    }*/

    return 0;
}