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

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;
}