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#include "wordsearch.h"
#include<dirent.h>
#include<fstream>
#include<vector>
#include<sstream>
WordSearch::WordSearch()
{
  mWord = new word();
}

void WordSearch::loadFiles(string directory_name)
{
  DIR *dir;
  struct dirent *entry;
  if((dir = opendir(directory_name.c_str()))== NULL ){
    cout<<"Error ";
  }

  while((entry = readdir(dir))!=NULL){
    if(string(entry->d_name) != "." && string(entry->d_name) != "..")
      {
        cout<<"Opening:" << entry->d_name<<endl;
        string slash("/");
        ifstream fin((string(directory_name)+slash+entry->d_name).c_str()); //open using absolute path
        string word;
        while(true){
          fin>>word;
          cout<<entry->d_name<<"::"<<word<<endl;
          mWord->Insert(word, entry->d_name);
          if(fin.eof()) {cout << "EOF " << entry->d_name << endl; break;}
          // Now the string "word" holds the keyword, and the string "files[i]" holds the document name.
          // Use these two strings to search/insert in your linked lists
          // wordIndex.Insert(word, files[i]);
        }
        fin.close();
      }
  }
  closedir(dir);
  mWord->printWordList();
}

std::vector<std::string> &split(const std::string &s, char delim, std::vector<std::string> &elems) {
  std::stringstream ss(s);
  std::string item;
  while(std::getline(ss, item, delim)) {
    elems.push_back(item);
  }
  return elems;
}


std::vector<std::string> split(const std::string &s, char delim) {
  std::vector<std::string> elems;
  return split(s, delim, elems);
}

void WordSearch::doQuery(string query, string result[], int& size)
{
  cout << "query=" << query << endl;
  vector<string> strings = split(query, ' ');
  for(int i=0; i<strings.size(); ++i){
    cout << "string " << i + 1 << " " << strings[i] << endl;
  }

  //  cout <<"isthere Black " << mWord->IsThere("Black") << endl;

  //get list of files for strings[0] and strings[2]
  list firstWordList, secondWordList;
  //cout<<"BP0"<<endl;
  mWord->GetFileList(strings[0], firstWordList);
  mWord->GetFileList(strings[2], secondWordList);
   //if string[1] is AND or MINUS
  vector<string> filesWord1, filesWord2;
  vector<string> res;
  if(strings[1]=="AND"){
   //test it
   for(int i=0; i<filesWord1.size(); ++i){
     // cout << "filepath "<< i+1 << " " << filesWord1[i]<<endl;
     if(secondWordList.IsThere(filesWord1[i]))
        res.push_back(filesWord1[i]);
   }
   for(int i=0; i<res.size(); ++i){
     //cout<<res[i]<<"<- the answer "<< endl;
     result[i]=res[i];
   }
  }

   //     result = &res[0];
     /*for(int i=0; i<filesWord2.size(); ++i){
     cout <<"filepath "<< i+1 << " " << filesWord2[i]<<endl;
     }*/
     else if(strings[1] == "MINUS"){
       if(!secondWordList.IsThere(filesWord1[i])){
         res.push_back(filesWord1[i]);
       }
       for(int i=0;i<res.size();++i)
         result[i]=res[i];
     }
     else{
       cout << "No Such File" << endl;
     }
   size = res.size();
}