#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <unistd.h>
#include <stdlib.h>
#include <linux/limits.h>

#include "forth.h"

int main(int argc, char *argv[])
{
  fh_globals.verbose = false;
  fh_globals.interactive = isatty(STDIN_FILENO);
  fh_globals.echo = 0;

  FILE *infile = stdin;
  char pwd[PATH_MAX+1];
  getcwd(pwd, PATH_MAX);

  // TODO use getopt
  for (int a = 1; a < argc; a++) {
    if (argv[a][0] == '-' && argv[a][1] != '-') {
      // opt
      char *cc = argv[a] + 1;
      char c;
      while (0 != (c = *cc++)) {
        switch (c) {
          case 'v':
            fh_globals.verbose = 1;
            break;
          case 'e':
            fh_globals.echo = 1;
            break;
          case 'r':
            fh_globals.rescue = 1;
            break;
          case 'h':
            printf("forth runtime, written by Ondřej Hruška, Nov 2021\n");
            printf("Arguments:\n");
            printf("-v   verbose logging\n");
            printf("-e   echo in batched mode\n");
            printf("-r   rescue on error in batched mode\n");
            printf("-h   this, duh\n");
            printf("FILE file to interpret, stdin console if not given\n");
            return 0;
          default:
            LOGE("Unknown flag: %c", c);
            return 1;
        }
      }
    } else {
      infile = fopen(argv[a], "r");
      fh_globals.interactive = false;
      if (!infile) {
        LOGE("Error opening infile: %s", argv[a]);
        return 1;
      }

      realpath(argv[a], pwd);
      char *end = strrchr(pwd, '/');
      if (end) {
        // add terminator
        *end = 0;
      }
    }
  }

  enum fh_error rv;
  struct fh_thread_s fh;
  rv = fh_init(&fh);
  if (rv != FH_OK) {
    LOGE("Error in forth init: %s", fherr_name(rv));
    return 1;
  }

  fh_runtime_start(&fh, fh_create_input_from_filestruct(infile, pwd));

  // Show resource usage
  LOG("\nResources used: DS %dW, RS %dW, memory %dB\n",
      (int) fh.data_stack_hwm, (int) fh.return_stack_hwm,
      (int) fh.here);

  if (fh_globals.interactive) {
    FHPRINT_SVC("Bye.\n");
  }
  return 0;
}