#include "common.hpp"
#include <dtl/dtl.hpp>

#include <cstdio>
#include <fcntl.h>
#include <iostream>
#include <string>
#include <sys/stat.h>
#include <sys/types.h>
#include <vector>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif // HAVE_UNISTD_H

using namespace std;

using dtl::Diff;

typedef unsigned char elem;
typedef vector<elem> sequence;

static int create_byte_seq(const char *fs, sequence &seq);
static int create_byte_seq(const char *fs, sequence &seq) {
  int fd;
  int siz;
  elem buf[BUFSIZ];
  if ((fd = open(fs, O_RDONLY)) == -1) {
    cout << "Opening failed." << endl;
    return -1;
  }
  while ((siz = read(fd, buf, sizeof(buf))) > 0) {
    for (int i = 0; i < siz; ++i) {
      seq.push_back(buf[i]);
    }
  }
  if (siz < 0) {
    close(fd);
    cout << "Read error." << endl;
    return -1;
  }
  close(fd);
  return 0;
}

int main(int argc, char *argv[]) {

  if (isFewArgs(argc)) {
    cerr << "Too few arguments." << endl;
    return -1;
  }

  string fs1(argv[1]);
  string fs2(argv[2]);
  sequence seq1;
  sequence seq2;

  create_byte_seq(fs1.c_str(), seq1);
  create_byte_seq(fs2.c_str(), seq2);

  Diff<elem, sequence> d(seq1, seq2);
  d.compose();

  if (d.getEditDistance() == 0) {
    cout << fs1 << " is the same as " << fs2 << endl;
  } else {
    cout << fs1 << " is different from " << fs2 << endl;
  }

  return 0;
}