// tyler taormina
// cst 116
// lab 7 
// number 1

#include <iostream>
#include <fstream>
#include <algorithm>
#include <stdio.h>
#include <iomanip>
#include <string>

using namespace std;
const int MAX = 10;

void RmString(string arr[], int);
void ClearBuffer();
void DisplayMenu(int&);
void ProcessMenuChoice (int&, int&, int&, std::string first[MAX], std::string last[MAX], std::string phone[MAX], std::string bday[MAX]);

void AddPerson(int, string first[MAX], string last[MAX], string phone[MAX], string bday[MAX]);
void PrintData(int, string first[MAX], string last[MAX], string phone[MAX], string bday[MAX]);
void FindString (string first[], string last[], string phone[], string bday[], int);
int ReadData (ifstream & inFile, std::string first[MAX], std::string last[MAX], std::string phone[MAX], std::string bday[MAX]);

void OutData(ofstream & outFile, string first[], string last[], string phone[], string bday[], int record_counter );

int main() 
{
    std::string f_name[MAX];
    std::string l_name[MAX];
    std::string phone[MAX];
    std::string bday[MAX];


    int record_counter = 0;
    int menu_choice;
    int flag = 1;

    ifstream inFile;

    //open file and read data 

    inFile.open ( "data.txt");

    if ( inFile.is_open ( ) )
    {
        record_counter = ReadData (inFile, f_name, l_name, phone, bday);
        inFile.close ( );
    }

    else
    {
        cout << "Trouble Opening File: inFile";
        cout << "\n\n\t\t ** About to EXIT NOW! ** ";
    }

    //User interacts with program here.
    while (flag != 0)
    {
        DisplayMenu(menu_choice);
        ProcessMenuChoice(menu_choice, flag, record_counter, f_name, l_name, phone, bday);
    }
    //Writes changes to the data.txt file
    ofstream outFile ( "data.txt" );
    if ( outFile.is_open ( ) )
    {

        OutData(outFile, f_name, l_name, phone, bday, record_counter);
        outFile.close ( );
    }
    else
    {
        cout << "Trouble Opening File: outFile";
        cout << "\n\n\t\t ** About to EXIT NOW! ** ";
    }

    return 0;
}


int ReadData ( ifstream & inFile, string first[MAX], string last[MAX], string phone[MAX], string bday[MAX])
{
    int counter = 0;
    inFile >> first[counter] >> last[counter] >> phone[counter] >> bday[counter]; // Priming Read

    while ( !inFile.eof ( ) )
    {
        counter++;
        inFile >> first[counter] >> last[counter] >> phone[counter] >> bday[counter];
    }

    return counter;
}


/* void FindString(string first[], int limit) */
/* { */
/*    // Check for a substring inside of one of the input strings. */
/*    // Prints whether or not the string was found. If found */
/*    // prints the index of the list where the string was found */
/*    // and what the string was that contained the substring. */

/*     string sub; */
/*     int i, j; */
/*     int reset = 0; */
/*     ClearBuffer(); */

/*     cout << "Lets look for a substring..." << endl; */
/*     cout << "Please enter a substring to look for: \n" << endl; */
/*     getline(cin, sub); */

/*     for (i = 0; i < limit; i++) { */
/*         if (arr[i].size() < sub.size()) */
/*             i = limit; */
/*         for (j = 0; j < arr[i].size(); j++) { */
/*             int k = 0; */
/*             if (arr[i][j] == sub[k]) { */
/*                 reset = j; */
/*                 while (arr[i][j] == sub[k] && k < sub.size()) { */
/*                     j++; */
/*                     k++; */
/*                 } */   
            
/*                 if (k == sub.size()){ */
/*                     cout << "We found it at index: " << i+1 << endl; */
/*                     cout << "The string was: " << arr[i] << endl; */
/*                 } */
/*                 else */
/*                     j = reset; */
/*             } */
/*         } */ 
/*     } */
/* } */


void PrintData(int record_counter, string first[MAX], string last[MAX], string phone[MAX], string bday[MAX])
{
    //Displays all strings stored.
    int i = 0;
    cout << "==================================================================\n";
    cout << "This is what we have in our database so far..." << endl;
    cout << "==================================================================\n";
    
    while (i < record_counter)
    {
        cout << i+1 << ") " << first[i] << " " << last[i] << " " << phone[i] << " " << bday[i] << endl;
        i += 1;
    }
}


void AddPerson(int record_counter, string first[MAX], string last[MAX], string phone[MAX], string bday[MAX])
{
    std::string temp;
    cout << "Enter the first name of the person you'd like to add: " << endl;
    cin >> temp;
    first[record_counter] = temp;
    cout << "Enter the last name of the person you'd like to add: " << endl;
    cin >> temp;
    last[record_counter] = temp;
    cout << "Enter the phone number of the person you'd like to add: " << endl;
    cin >> temp;
    phone[record_counter] = temp;
    cout << "Enter the birthday of the person you'd like to add: " << endl;
    cin >> temp;
    bday[record_counter] = temp;
}

/* void RmString(string arr[], int limit) */
/* { */
/*     // Finds string within array and removes the element. */ 
/*     // May need to use vector. */
/*     int i = 0, j = 0, k = 0; */
/*     int choice; */
/*     string deleted; */
/*     string copy[max]; */

/*     cout << "What data entry would you like to delete..." << endl; */
/*     PrintString(limit, arr); */
/*     cout << "Please enter the number for the string that you'd like to delte: " << endl; */
/*     cin >> choice; */
/*     choice -= 1; */
/*     cout << "Working...\n\n" << endl; */
  
/*     for (j = 0 ; j < limit + 1; j++) */
/*     { */
/*         if (k == choice) { */
/*             cout << "Deleting...\n\n" << endl; */
/*             deleted = arr[k]; */
/*             k++; */
/*             j--; */

/*         } */
/*         else { */
/*             copy[j] = arr[k]; */
/*             k++; */
/*         } */
/*     } */
   
/*     cout << "==================================================================\n"; */
/*     cout << "Here is our updated database..." << endl; */
/*     cout << "==================================================================\n"; */

/*     while (i < (limit - 1)) */
/*     { */
/*         cout << i+1 << ") " <<  copy[i] << endl; */
/*         i++; */
/*     } */

/*     cout << "We removed: " << deleted << endl; */
/* } */


void DisplayMenu(int& menu_choice) 
{
    //Displays the menu of functions for the user to choose from.
    menu_choice = 0;
    cout << "==================================================================\n";
    cout << "                         MENU" << endl;
    cout << "==================================================================\n";

    cout << "1) Find a person's information.\n";
    cout << "2) Add a new person to the database.\n";
    cout << "3) Edit information for a certain individual.\n";
    cout << "4) Display full database.\n";
    cout << "5) Exit Program.\n\n";
    cout << "Enter: ";
    cin >> menu_choice;
    if (menu_choice > 5 || menu_choice < 1) 
    {
        cout << "Invalid Entry. Please enter a number from the options list provided.\n\n\n\n" << endl;
        DisplayMenu(menu_choice);
    }
}


void ProcessMenuChoice (int& menu_choice, int& flag,  int& record_counter, std::string first[MAX], std::string last[MAX], std::string phone[MAX], std::string bday[MAX])
{
    //Takes in user input for menu choice and calls the appropriate function.
    ClearBuffer();
    flag = 0;
    switch(menu_choice)
    {
        case 1: 
           // FindString(FNAME, LNAME, PHONE, BDAY, limit);
            break;
        
        case 2: 
            record_counter++;
            AddPerson(record_counter, first, last, phone, bday);
            break;

        case 3:
            //Edit information for a certain person
            break;


        case 4:
            PrintData(record_counter, first, last, phone, bday);
            break;

        case 5: 
            cout << "Ending program." << endl;
            cout << "Are you sure you want to quit?" << endl;
            break;

        default:
            break;
    }
    cout << "Press 0 to close the program.\n" << endl;
    cout << "Press any other number to continue the program.\n" << endl;
    cin >> flag;
}


void OutData(ofstream & outFile, string first[], string last[], string phone[], string bday[], int record_counter )
{
    int i;
    cout << "Writing Changes..." << endl;
    
    for (i = 0; i < record_counter; i++)
    {
        outFile << first[i] << " " << last[i] << " " << phone[i] << " " << bday[i] << endl;
    }
}


void ClearBuffer() 
{
    // clears buffer after menu choice so as not to interfere with the following user inputs.
	char c;
	do {
		c = getchar();
	} while (c != '\n' && c != EOF);
}