#include <iostream>
#include <fstream>
#include <ctime>
#include <string>
#include <time.h>
#include <cmath>
#include <cstdlib>

using namespace std;

typedef struct {
    string number = "";
    string surname = "";
    string firstname = "";
    double maxDebit = 0;
    int maxTransAmount = 0;
    double balance = 0;
    string dateUpdated = "";
    string timeUpdated = "";
} Account;

typedef struct {
    string number;
    double amount;
    string date;
    string time;
    int ATMnumber;
}Transaction;


void create_account_file(Account* accounts, int count) {

    ofstream file("account.txt", ios::app);

    for (int i = 0; i < count; i++) {
        file << accounts[i].number.c_str() << '\t' << accounts[i].surname.c_str() << '\t' << accounts[i].firstname.c_str() << '\t' << accounts[i].maxDebit << '\t'
            << accounts[i].maxTransAmount << '\t' << accounts[i].balance << '\t' << accounts[i].dateUpdated.c_str() << '\t' << accounts[i].timeUpdated.c_str() << '\n';
    }

    file.close();

}

void create_transaction_file(Transaction* transactions, int count) {

    ofstream file("transaction.txt", ios::app);

    for (int i = 0; i < count; i++) {
        file << transactions[i].number << '\t' << transactions[i].amount << '\t' << transactions[i].date << '\t' << transactions[i].time << '\t' << transactions[i].ATMnumber << '\n';
    }

    file.close();
}

string get_date()
{
    time_t rawtime;
    struct tm * timeinfo;
    char buffer[80];

    time(&rawtime);
    timeinfo = localtime(&rawtime);

    strftime(buffer, sizeof(buffer), "%d-%m-%Y", timeinfo);

    string str(buffer);

    return str;
}

string get_time()
{
    time_t rawtime;
    struct tm * timeinfo;
    char buffer[80];

    time(&rawtime);
    timeinfo = localtime(&rawtime);

    strftime(buffer, sizeof(buffer), "%I:%M:%S", timeinfo);

    string str(buffer);

    return str;
}

void update_account(Account* account, Transaction* transaction){

    fstream transactions_file("transaction.txt",ios::in);
    fstream accounts_file("account.txt",ios::in);
    fstream temp_file("temp.txt",ios::out);
    fstream debit("debety.txt",ios::out);
    fstream limit("limity.txt",ios::out);

    while(
        accounts_file>>account->number
        >>account->surname
        >>account->firstname
        >>account->maxDebit
        >>account->maxTransAmount
        >>account->balance
        >>account->dateUpdated
        >>account->timeUpdated
            )
    {
                if (account->number == transaction->number){
                    if (account->maxTransAmount < transaction->amount){
            limit<<transaction->number<<"\t"
            <<transaction->amount<<"\t"
            <<transaction->date<<"\t"
            <<transaction->time<<"\t"
            <<transaction->ATMnumber<<"\n";
        }
        else if (account->balance + account->maxDebit < transaction->amount){
            debit<<transaction->number<<"\t"
            <<transaction->amount<<"\t"
            <<transaction->date<<"\t"
            <<transaction->time<<"\t"
            <<transaction->ATMnumber<<"\n";
        }
        else{
            temp_file<<account->number<<"\t"
            <<account->surname<<"\t"
            <<account->firstname<<"\t"
            <<account->maxDebit<<"\t"
            <<account->maxTransAmount<<"\t"
            <<(account->balance = account->balance - transaction->amount)<<"\t"
            <<(account->dateUpdated = transaction->date)<<"\t"
            <<(account->timeUpdated = transaction->time)<<"\n";
        }
        }
        else{
            temp_file<<account->number<<"\t"
            <<account->surname<<"\t"
            <<account->firstname<<"\t"
            <<account->maxDebit<<"\t"
            <<account->maxTransAmount<<"\t"
            <<account->balance<<"\t"
            <<account->dateUpdated<<"\t"
            <<account->timeUpdated<<"\n";
        }
    }
            temp_file.close();
            accounts_file.close();

            temp_file.open("temp.txt",ios::in);
            accounts_file.open("account.txt",ios::out);

            while(
            temp_file>>account->number
            >>account->surname
            >>account->firstname
            >>account->maxDebit
            >>account->maxTransAmount
            >>account->balance
            >>account->dateUpdated
            >>account->timeUpdated)
            {
                accounts_file<<account->number<<"\t";
                accounts_file<<account->surname<<"\t";
                accounts_file<<account->firstname<<"\t";
                accounts_file<<account->maxDebit<<"\t";
                accounts_file<<account->maxTransAmount<<"\t";
                accounts_file<<account->balance<<"\t";
                accounts_file<<account->dateUpdated<<"\t";
                accounts_file<<account->timeUpdated<<"\n";

            }

            transactions_file.close();
            accounts_file.close();
            temp_file.close();
            debit.close();
            limit.close();
}



void create_an_account() {

    system("cls");

    Account* account = new Account;

    cout << "Account number: ";
    cin >> account->number;
    cout << "Surname: ";
    cin >> account->surname;
    cout << "First name: ";
    cin >> account->firstname;
    cout << "Maximal debit: ";
    cin >> account->maxDebit;
    cout << "Maximal transaction amount: ";
    cin >> account->maxTransAmount;
    cout << "Account balance: ";
    cin >> account->balance;
    account->dateUpdated = get_date();
    account->timeUpdated = get_time();

    create_account_file(account, 1);

    delete account;
}

void make_a_transaction() {

    system("cls");

    Transaction* transaction = new Transaction;
    Account* account = new Account;

    cout << "Account number: ";
    cin >> transaction->number;
    cout << "Transaction amount: ";
    cin >> transaction->amount;
    transaction->date = get_date();
    transaction->time = get_time();
    cout << "ATM number: ";
    cin >> transaction->ATMnumber;
    system("Pause");

    create_transaction_file(transaction, 1);

    update_account(account, transaction);

    delete transaction;
}



bool menu() {

    system("cls");

    cout << "MENU" << endl << "1. Create an account" << endl << "2. Make a transaction" << endl << "3. Exit" << endl;

    int option;

    cin >> option;

    switch (option) {
    case 1: {
        create_an_account();
        break;
    }
    case 2: {
        make_a_transaction();
        break;
    }
    case 3: {
        return true;
        break;
    }
    }
    return false;

}

int main() {

    while (menu() == false){

    menu();
    }

    return 0;
}