//using std with cout and cin instead of namespace

#include <iostream>
#include <fstream>
#include <string>
#include <ctime>
#include <conio.h>
#include <stdio.h>
#include <sstream>
using namespace std;

struct User {
        int acctNumber1;                        //User account number 1
        int acctNumber2;
        double acctBalance1;            //user account balance 1
        double acctBalance2;
        int     acctInterest1;                  //user account interest rate1
        int acctInterest2;
        char acctName[256];                     //User account Name
        char acctPass[256];                     //user account password
        int logInNumber;
        bool isAdmin;
} account[8999]; // 9999 - 1000 because we virtually start at record '1000'

void saveAccounts()
{/*
        std::stringstream stream;
        char buffer[100];
        FILE *accountsFile = fopen("C:\\Users\\James\\Desktop\\accounts.txt", "w+");
        if (accountsFile!=NULL)
        {
            for(int i = 0; i < 8999; i++) {
                if(account[i].acctNumber1!=NULL) {
                    stream << account[i].acctNumber1;
                    string s = stream.str();
                    fputs(s.c_str(), accountsFile);
                    accountsFile << account[i].acctNumber1 << '\n';
                }
            }
        } else { cout << "Unable to open file!"; }
        fclose(accountsFile);
        */
    ofstream accountsFile;
    accountsFile.open ("accounts.dat");
    for(int i = 0; i < 8999; i++) {
        if(account[i].acctNumber1 != NULL) {
            accountsFile << account[i].acctNumber1 << "\n";
        }
    }
    accountsFile.close();
    _getch();
}


void printSummary(int user) {
        printf("\n\n"
                   "+-----------------+\n"
                   "| Account Summary |\n"
                   "+=================+\n\n"
                   "+-----------------------------------------------------+\n"
                   "| Account | Account number | Balance  | Interest Rate |\n"
                   "+---------+----------------+--------------------------+\n"
                   "| 1       | %d           | %.2lf                      \n"           //add interest rate 1 and 2
                   "| 2       | %d           | %.2lf                      \n\n\n",
                   account[user].acctNumber1, account[user].acctBalance1, account[user].acctNumber2, account[user].acctBalance2);
}

void createAccount(int *n) {
        *n = *n+1;
        int *inputInt = new int[1];
        std::cout << "Please Fill out the following information to create a new account" << std::endl;
        std::cout << "Full name: ";
        std::cin >> account[*n].acctName;
        std::cout << "Password: ";
        std::cin >> account[*n].acctPass;

        // get first account number
        std::cout << "First account number: ";
        std::cin >> *inputInt;
        while(*inputInt < 1000 || *inputInt > 9999) { // check none of the users already have this account number, if they do keep prompting
                std::cout       << "Account number invalid. Must be between 1000 and 9999.\n"
                                        << "------------------------------------------------------\n"
                                        << "First account number: ";
                std::cin >> *inputInt;
        }
        account[*n].acctNumber1 = *inputInt; // valid (new) account number, add it to the user

        // get first account balance
        std::cout << "First account Balance: ";
        std::cin >> account[*n].acctBalance1;

        //check its between 0 and 100,000 else re ask

        //get first interest rate, check its between .01% and 15% else re ask

        // get second account number
        std::cout << "Second account number: ";
        std::cin >> *inputInt;
        while(*inputInt < 1000 || *inputInt > 8999) { // check none of the users already have this account number, if they do keep prompting
                std::cout       << "Account number invalid. Must be between 1000 and 9999.\n"
                                        << "------------------------------------------------------\n"
                                        << "Second account number: ";
                std::cin >> *inputInt;
        }
        account[*n].acctNumber2 = *inputInt; // valid (new) account number, add it to the user

        //get second account balance
        std::cout << "Second account balance: ";
        std::cin >> account[*n].acctBalance2;

        //check its between 0 and 100,000 else re ask

        //get first interest rate, check its between .01% and 15% else re ask

}

void login(int *userId, int *loggedIn) {
        char *inputText = new char[256];
        std::cout << "Please enter username: ";
        std::cin >> inputText;
        for(int i = 0; i < 8999; i++) {
                if ( strcmp (account[i].acctName, inputText) == 0 ) {
                        std::cout << "Welcome " << account[i].acctName << ", Please enter your password: " << std::endl; //move to logged in menu
                        std::cin >> inputText;
                        if ( strcmp (account[i].acctPass, inputText) == 0 ) {
                                printSummary(i);
                                std::cout << "Press [Enter] to continue" << std::endl;
                                _getch();
                                *loggedIn = 1;
                                account[i].logInNumber++;
                                *userId = i;
                        }
                        else {
                                std::cout << "Incorrect password." << std::endl;
                                break;
                        }
                }
        }
        saveAccounts();
}

void transferMoney(int *userId) {
        double amount = 0.00;
        bool enoughFunds = false;
        std::cout       << "Please enter amount to transer: ";
        std::cin        >> amount;
        if(account[*userId].acctNumber1 == account[*userId].acctNumber2) {
                printf( "   ^       +-----------+\n"
                                " / ! \\     | Declined: |      Account numbers are the same.\n"
                                "/____ \\    +-----------+\n\n");
        }
        if(amount > account[*userId].acctBalance1) {
                printf( "   ^       +-----------+\n"
                                " / ! \\     | Declined: |      Not enough founds in account number %d\n"
                                "/____ \\    +-----------+\n\n",
                                account[*userId].acctNumber1);
        } else { enoughFunds = true; }
        if(enoughFunds && (account[*userId].acctBalance1 - amount) < 10.00) {
                printf( "+----------+\n"
                                "| Warning: |   Account number %d now has a balance less than $10.00.\n"
                                "+----------+\n\n",
                                account[*userId].acctNumber1);
                account[*userId].acctBalance2 += amount;
                account[*userId].acctBalance1 -= amount;
                std::cout << "Press [Enter] to continue" << std::endl;
                enoughFunds = false; //prevent a second transfer happening
        }
        if(enoughFunds) {
                if((amount + account[*userId].acctBalance2) > 100000.00) {
                        printf( "+----------+\n"
                                        "| Warning: |   Account number %d will have a balance greater\n"
                                        "+----------+   than the federally insurable amount of\n"
                                        "               $100,000.00 if you proceed.\n\n",
                                        account[*userId].acctNumber2);
                        char yn = 'x';
                        // loop until the input is a y or n
                        while(yn != 'y' && yn != 'n') {
                                std::cout << "Continue with transfer? Select [Y]es or [N]o" << std::endl;
                                std::cin >> yn;
                        }
                        if(yn = 'n') {
                                exit(0);
                        }
                } else {
                        // make the transfer
                        account[*userId].acctBalance2 += amount;
                        account[*userId].acctBalance1 -= amount;
                        printf( "\n\n\n+--------------------+"
                                        "| Transfer complete. |"
                                        "+--------------------+\n\n\n");
                        printSummary(*userId);
                }
        }
        std::cout << "Press [Enter] to continue" << std::endl;
        _getch();
}

void saveData() {//save all user account data to a csv file
//ACCTNAME, ACCTNUMBER1, ACCTBALANCE1, ACCTINTEREST1, ACCTNUMBER2, ACCTBALANCE2, ACCT INTEREST2, PASSWORD,
}

void accountDeposit(int *userId) {

        int acctDepNum = 0;
        int acctDepAmt = 0;

        std::cout       <<      "Please enter the account number you wish to deposit to"        <<      std::endl
                                <<      "1."    <<      std::endl //user ACCTNUMBER 1
                                <<      "2."    <<      std::endl //user acctnumber 2
                                <<      std::endl;
        std::cin        >>      acctDepNum;

        std::cout       <<      "Please enter deposit amount"   <<      std::endl;
        std::cin        >>      acctDepNum;

        if (acctDepNum == 1) {
                account[*userId].acctBalance1 +=        acctDepAmt;
        }
        if (acctDepNum == 2) {
                account[*userId].acctBalance2 += acctDepAmt;
        }
        saveAccounts();
        return; //return to logged in menu
}

void accountWithdraw(int *userId) {

        int acctWitNum = 0;
        int acctWitAmt = 0;

        std::cout<<"Please enter the account number you wish to deposit to"<<std::endl
                 <<"1."<<std::endl //user ACCTNUMBER 1
                 <<"2."<<std::endl //user acctnumber 2
                 <<std::endl;
        std::cin        >>  acctWitNum;

        std::cout       <<      "Please enter deposit amount"<< std::endl;
        std::cin        >>      acctWitNum;

        if(acctWitNum == 1) {
                account[*userId].acctBalance1 +=        acctWitAmt;
        }
        if(acctWitNum == 2) {
                account[*userId].acctBalance2 += acctWitAmt;
        }
        saveAccounts(); //run save data
        return;
}

void loggedInMenu(int *userId) {

        int loggedinmenuselect = 0;
                while(loggedinmenuselect == 0) {    //show menu when logged in is complete.
                        std::cout       <<"Hello, acctname! Welcome to your account screen, Please select from the following menu: " <<std::endl;
                        std::cout       <<"1. Print account summary" <<std::endl;
                        std::cout       <<"2. Initiate Balance Transfer"<<std::endl;
                        std::cout       <<"3. Deposit to account"<<std::endl;
                        std::cout       <<"4. Withdraw from account"<<std::endl;
                        std::cout       <<"5. Calculate Interest/ Balance Forecast"<<std::endl;
                        std::cout       <<"6. Log out."<<std::endl;

                        std::cin        >>      loggedinmenuselect;

                        //1. account summary
                        if(loggedinmenuselect ==1) {
                                printSummary(*userId);
                        }
                        //2. initiate balance transfer
                        if(loggedinmenuselect ==2) {
                                transferMoney(userId);
                        }
                        //3. deposit to account
                        if(loggedinmenuselect ==3) {
                                printSummary(*userId);
                        }
                        //4. withdraw from account
                        if(loggedinmenuselect ==4) {
                                printSummary(*userId);
                        }
                        //5. balance forecast
                        if(loggedinmenuselect ==5) {
                                printSummary(*userId);
                        }
                        //6. exit
                        if(loggedinmenuselect ==6) {
                                //savedata
                                //break;        Break;  Break;
                        }
                }
}

int main()
{
        time_t _time;
        struct tm timeinfo;
        time ( &_time );
        localtime_s (&timeinfo,&_time);

        // loops and menu initialisation
        int n = 0;
        int menuInput = 0;

                                        //top level menu
        int subMenuInput = 2;                   //logged in account level menu
        int loggedIn = 0;

        // user account details
        int inputInt = 0;
        int userId = 10000;

        std::cout << "Welcome to Interbanking Proprietary limited Super Squad" << std::endl;    //Welcome Message
        //createAccount(&n);
        while(loggedIn == 0) // present the menu screen until the user logs in
        {
                std::cout << "Please select from the following menu"    <<std::endl;    //Welcome Menu
                std::cout << "1. Log in with existing bank account."    <<std::endl;
                std::cout << "2. Create new bank account."                              <<std::endl;
                std::cin  >> menuInput;
                if(menuInput == 1)
                {
                        login(&n, &loggedIn); // end option 1
                }
                if(menuInput == 2)
                {
                        createAccount(&n);
                        menuInput = 0;
                }

                login(&userId, &loggedIn);

        } // end loggedIn loop
} // end main