#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>

#include "cursed.h"
#include "termios.h"

struct s_state *glstate;

PRIVATE inline int termenable(struct s_state *st) {
  struct termios term;

  // if (!st)
  //   return 1;

  if (ioctl(0, TCGETS, &term) == -1)
    return 1;
  memcpy(&st->term, &term, sizeof(struct termios));
  // control characters
  // term.c_cc[VMIN] = 1;
  // term.c_cc[VTIME] = 0;
  // io flags
  term.c_iflag &= ~(IXON | INPCK | ICRNL | ISTRIP | BRKINT);
  term.c_oflag &= ~(OPOST); // disable post-processing (using \r\n manually now)
  term.c_cflag |= (CS8);
  // misc flags
  term.c_lflag &= ~(ECHO | ICANON | IEXTEN);
  if (ioctl(0, TCSETS, &term))
    return 1;

  // unbuffer stdin
  // if (setvbuf(stdin, NULL, _IOLBF, 0))
  //   return 1;

  return 0;
}

PRIVATE inline int termdisable(struct s_state *st) {
  if (!st)
    return 1;

  if (ioctl(0, TCSETS, &st->term))
    return 1;
  
  return 0;
}

PRIVATE struct s_framebuffer *init_framebuffer(pos cols, pos rows) {
  unsigned long int fbsz, bmsz; // framebuf + bitmap sizes
  struct s_framebuffer *buf;
}

PRIVATE struct s_state *init_state(void) {
  struct s_state *st = (struct s_state*)malloc(sizeof(struct s_state));
  if (st == NULL) exit(1); // BUG: WARNING: TODO
  return st;
}

PUBLIC _INIT void initlib(void) {
  // atexit(destroylib)
  glstate = init_state();
  termenable(glstate);
  // (volatile void)init_window(glstate, 90, 25);
}

PUBLIC _FINI void destroylib(void) {
  // if (glstate != NULL) 
  termdisable(glstate);
}



int main(int argc, char **argv) {
  // TODO: use STDIN_FILENO instead for 0
  char c, s[10];
  int pad;
  while (read(STDIN_FILENO, &c, 1) == 1) {
    sprintf(s, "%d", c);
    pad = 3 - strlen(s); // max is 256 (strlen 3)
    
    printf("0x%.02hhx %s", c, s);
    if (!iscntrl(c)) {
      for (int i=0; i < pad; i++)
        putchar(' ');
      printf(" (%c)", c);
    }
    printf("\r\n");
  }

  return EXIT_SUCCESS;
}