#include "common.hpp"
#include <cassert>
#include <dtl/dtl.hpp>
#include <fstream>
#include <iostream>
#include <sstream>
#include <vector>

using namespace std;

using dtl::Diff;

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

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

  string A(argv[1]);
  string B(argv[2]);
  bool fileExist = true;

  if (!isFileExist(A)) {
    cerr << "file A does not exist" << endl;
    fileExist = false;
  }

  if (!isFileExist(B)) {
    cerr << "file B does not exist" << endl;
    fileExist = false;
  }

  if (!fileExist) {
    return -1;
  }

  typedef string elem;
  typedef vector<elem> sequence;

  ifstream Aifs(A.c_str());
  ifstream Bifs(B.c_str());
  elem buf;
  sequence ALines, BLines;
  ostringstream ossLine, ossInfo;

  while (getline(Aifs, buf)) {
    ALines.push_back(buf);
  }
  while (getline(Bifs, buf)) {
    BLines.push_back(buf);
  }

  Diff<elem> d(ALines, BLines);
  d.compose();

  sequence s1 = ALines;
  sequence s2 = d.patch(s1);

  // fpatch
  assert(BLines == s2);
  cout << "fpatch succeeded" << endl;

  d.composeUnifiedHunks();
  sequence s3 = d.uniPatch(s1);

  // unipatch
  assert(BLines == s3);
  cout << "unipatch succeeded" << endl;

  return 0;
}