#include <iostream>
#include <cctype>
#include <cstring>
#include <fstream>
using namespace std;
 
struct Phonebook
{
  char fname[15];
  char lname[15];
  char fullname[45];
  char number[50];
  char email[81];
};
 
bool openPhonebook(fstream &, char [81]);
void Displayphonelist(fstream &);
void Addnewcontacts(fstream &);
void Deletecontacts(fstream &);
void Editinfo();
void Searchcontact(fstream &);
 
int main()
{
  fstream info;
 
  int choice = 0;
  int count = 0;
 
  cout << "1. Display Contact List\n";
  cout << "2. Add a new contact\n";
  cout << "3. Delete a personal contact\n";
  cout << "4. Edit personal contact information\n";
  cout << "5. Search for contact\n";
  cout << "6. Exit Program\n";
 
  cout << "\nPlease enter choice number: \n";
  cin >> choice;
 
  switch(choice)
  {
  case 1: 
    {
      if(!openPhonebook(info, "Contactlist.txt"))
      {
        cout << "File open error!\n";
        exit(1);	//Exits the program on error
      }
 
      cout << "File opened successfully.\n";
      cout << "Now reading data from file.\n\n";
      Displayphonelist(info);
      info.close();
      cout << "\nDone\n";
      break;
    }
  case 2: 
    {	
      cout << "Add a new contact\n";
 
 
      Addnewcontacts(info);
      cout << "\nSaving Information....\n";
      break;
    }
  case 3: cout << "Delete a personal contact\n";
    break;
  case 4: cout << "Edit personal contact information\n";
    break;
  case 5: cout << "Searching for contacts";
    Searchcontact(info);
    cout << "\nDone\n";
    break;
  case 6: cout << "Goodbye!\n";
    exit(1);
 
  default: cout << "Please enter valid choice\n";
    cin >> choice;
  }
 
  return 0;
}
// END OF MAIN
 
bool openPhonebook(fstream &file, char *name)
{
  bool status;
 
  file.open(name, ios::in);
  if (file.fail())
    status = false;
  else
    status = true;
  return status;
}
 
void Displayphonelist(fstream &file)
{	
  Phonebook Info;
 
  file.getline(Info.fullname, 45);
  file.getline(Info.number,50);
  file.getline(Info.email, 81);
 
  while(!file.eof())
  {
    cout << Info.fullname << endl;
    cout << Info.number << endl;
    cout << Info.email << endl;
 
    file.getline(Info.fullname, 45);
    file.getline(Info.number, 50);
    file.getline(Info.email, 81);
  }
}
 
void Addnewcontacts(fstream &file)
{	
  Phonebook Info;
  char choice;
  do
  {
    cout << "Opening file.....\n";
    file.open("Contactlist.txt", ios::out| ios::app);
    cout << "File open successfully\n";
 
    if(!file)
    {
      cout << "Error opening Contactlist.txt\n";
      exit(1);
    }
 
    if(!file.eof())
    {	
      cout << "Enter first name: ";
      cin >> Info.fname;
      cout << "Enter last name: ";
      cin >> Info.lname;
      strcpy(Info.fullname, Info.fname);
      strcat(Info.fullname, " ");
      strcat(Info.fullname, Info.lname);
 
      cout << "Enter number: ";
      cin.ignore();
      cin.getline(Info.number, 50);
 
      cout << "Enter email: ";
      cin.getline(Info.email, 81);
 
      file << "Name: " << Info.fullname << endl;
      file << "Number: " << Info.number << endl;
      file << "Email: " << Info.email << endl;
      file << "\n";
 
      file.close();	
    }
 
    cout << "Enter another contact?\n";
    cin >> choice;
  }while((choice == 'y')||(choice == 'Y'));
 
  if((choice == 'n')||(choice == 'N'))
  {
    file.close();
  }
}
 
void Searchcontact(fstream &file)
{	
  Phonebook Info;
  char fname2[15];
  char lname2[15];
  char fullname2[45];
 
  cout << "Opening file...\n";
  file.open("Contactlist.txt", ios::in);
  cout << "File open successfully\n";
 
  while(!file)
  {
    cout << "Error opening file\n";
    exit(1);
  }
 
  while(!file.eof())
  {
    cout << "Search by Full Name: \n";
    cout << "First Name: \n";
    cin >> fname2;
    cout << "Last Name: \n";
    cin >> lname2;
    strcpy(fullname2, fname2);
    strcat(fullname2, "");
    strcat(fullname2, lname2);
 
    if(strcmp(fullname2, Info.fullname))
    {
      cout << "There is no match\n";
      file.close();
    }
    else
    {
      cout << "Name Found!\n";
      cout << fullname2 << endl;
      cout << Info.fullname << endl;
 
      file.getline(Info.fullname, 45);
      file.getline(Info.number, 50);
      file.getline(Info.email, 81);
 
      cout << "\nDone\n";
    }
  }
}