#include<iostream>
#include<string>
#include<cstring>
#include<cstdlib>
#include<cmath>
#include <cstddef>
using std::string;
using std::getline;
using  namespace std;
string name[101] = { "" };
string email[101] = { "" };
string tele[101] = { "" };
int menu()
 {
	 int k;

	cout << endl << endl << "***********MAIN MENU***********" << endl;
	cout << "1. Initialize the address book" << endl;
	cout << "2. Create person contact information" << endl;
	cout << "3. Lookup person contact inforamtion" << endl;
	cout << "4. Look all person contact inforamtion" << endl;
	cout << "5. Quit " << endl;
	cout << endl << "Please enter your chioce <1, 2, 3, 4 or 5 to exit :" << endl;
	cin >> k;
	if (k > 5 || k < 0)
	{
		cout << "Invalid input!Please enter again!";
		menu();
	}
	if (k == 1)
	{
		addressbook();
	}
	if (k == 2)
	{
		cpersoninfo();
	}
	if (k == 3)
	{
		lpersoninfo();
	}
	if (k == 4)
	{
		lapersoninfo();
	}
	if (k == 5)
	{
		cout << "Goodbye";
		return 0;
	}
}
void addressbook()
{
	int i;

	name[1] = {"Lawrence Cheung"};
	cout << "Name is : " << name[1] << endl;
	email[1] = { "enccl@eie.polyu.edu.hk" };
	cout << "Email is : " << email[1] << endl;
	tele[1] = { "27666131" };
	cout << "Telephone number is : " << tele[1];

	name[2] = { "Helen Wong" };
	cout << "Name is : " << name[2] << endl;
	email[2] = { "helenwong@yahoo.com.hk" };
	cout << "Email is : " << email[2] << endl;
	tele[2] = { "94665888" };
	cout << "Telephone number is : " << tele[2];

	name[3] = { "Simon Sui"};
	cout << "Name is : " << name[3] << endl;
	email[3] = { "ss123@gmail.com" };
	cout << "Email is : " << email[3] << endl;
	tele[3] = { "64441234" };
	cout << "Telephone number is : " << tele[3];

	name[4] = {"Mary Ho" };
	cout << "Name is : " << name[4] << endl;
	email[4] = { "ho.mary10@netvigator.com" };
	cout << "Email is : " << email[4] << endl;
	tele[4] = { "21111112" };
	cout << "Telephone number is : " << tele[4];

	for (i = 5;i < 102;i++)
	{
		name[i] = {""};
		email[i] = {""};
		tele[i] = {""};
	}
	cout << "Initialization is completed ." << endl;
	menu();
}
void cpersoninfo()
{
	int max;
	int ii;
	int count = 1;
	size_t pos = 0, pos1 = 0;

	cout << "Please enter the total number of records to be created";
	cin >> max;
	if(max > 0 || max<11)
	{
		for (int ii = count;ii <= max+count;ii++)
		{
			cout << "Full name : ";
			cin >> name[ii];
			size_t found= name[ii].find_first_not_of("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQSTUVWXYZ ");
			while(found != std::string::npos)
			{
				cout << "Invalid input!Please enter again!"<<endl;
				cin >> name[ii];
				size_t found = name[ii].find_first_not_of("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQSTUVWXYZ ");
			}
				cout << "Email address : ";
				cin >> email[ii];
				pos = email[ii].find('@', 0);
				while (pos == string::npos || pos == 0 || pos + 1 == email[ii].length())
				{
					cout << "Invalid input!Please enter again!" << endl;
					cin >> email[ii];
				}
				cout << "8-digit telephone number : ";
				cin >> tele[ii];
				size_t found1 = tele[ii].find_first_not_of("0123456789 ");
				pos1 = tele[ii].find('0', 0);
				while (found1 != std::string::npos || tele[ii].length != 8||pos1==0)
				{
					cout << "Invalid input!Please enter again!" << endl;
					cin >> tele[ii];
				}
		}
		count = count + ii;
		ii = 0;
	}
	else
	{
		while (max < 0 || max>10)
		{
			cout << "The input is invalid . It must be an integer not greater than 10 .";
			cout << "Please enter the total number of records to be created";
			cin >> max;
		}

	}
}
void lpersoninfo()
{
	int q = 0;
	int findname = 0;
	int findemail = 0;
	int findtele = 0;
	string kk = "a";
	string NAME = "";
	string EMAIL = "";
	string TELE = "";
	while (kk == "a" || kk == "A" || kk == "b" || kk == "B" || kk == "c" || kk == "C")
	{
		cout << endl << endl << "***********SUB-MENU***********" << endl;
		cout << "a. Search record by name " << endl;
		cout << "b. Search record by email address " << endl;
		cout << "c. Search record by telephone number" << endl;
		cout << "d. Return to main menu" << endl << endl;
		cout << "Please enter your chioce < a, b, c or d to return> : ";

		getline(cin, kk);
		size_t found2 = kk.find_first_not_of("abcdABCD ");
		while (found2 != std::string::npos || kk.length != 1)
		{
			cout << "Invalid input!Please enter again!" << endl;
			cin >> kk;
		}
		if (kk == "a" || kk == "A")
		{
			cout << "Please enter a name to search" << endl;
			cin >> NAME;
			for (q = 0;q <= 101;q++)
			{
				if (NAME == name[q])
				{
					cout << "A record is found!" << endl;
					cout << "Email address is : " << email[q] << endl;
					cout << "Telephone number is : " << tele[q] << endl;
					findname = 1;

					break;
				}

			}
			if (findname == 0)
			{
				cout << "Sorry, no record is found !" << endl;
			}
			findname = 0;
			q = 0;
		}
		if (kk == "b" || kk == "B")
		{
			cout << "Please enter an email to search" << endl;
			cin >> EMAIL;
			for (q = 0;q <= 101;q++)
			{
				if (EMAIL == email[q])
				{
					cout << "A record is found!" << endl;
					cout << "Full name is : " << name[q] << endl;
					cout << "Telephone number is : " << tele[q] << endl;
					findemail = 1;
					break;
				}

			}
			if (findemail == 0)
			{
				cout << "Sorry, no record is found !" << endl;
			}
			findemail = 0;
			q = 0;



		}
		if (kk == "c" || kk == "C")
		{
			cout << "Please enter a telephone number to search" << endl;
			cin >> TELE;
			for (q = 0;q <= 101;q++)
			{
				if (TELE == tele[q])
				{
					cout << "A record is found!" << endl;
					cout << "Full name is : " << name[q] << endl;
					cout << "Email address is : " << email[q] << endl;
					findtele = 1;
					break;
				}

			}
			if (findtele == 0)
			{
				cout << "Sorry, no record is found !" << endl;
			}
			findtele = 0;
			q = 0;


		}
		if (kk == "d" || kk == "D")
		{
			menu();
		}
	}
}
void lapersoninfo()
{
	int q = 0;
	for (q = 0;q <= 101;q++)
	{
		if (name[q] != "")
		{
			cout << "Full name is : " << name[q] << endl;
			cout << "Email address is : " << email[q] << endl;
			cout << "Telephone number is : " << tele[q] << endl;
		}
	}
	menu();
}

int main()
{
		menu();
}