#include "stdafx.h"
#include <fstream> // библиотека за файлове
#include <string>
#include <iostream>

using namespace std;

struct account
{
	string name;
	double sum;
};

void convertFromFileToArray(account accountsData[100], int &accountsCount);
void investing(account accountsData[100], int accountsCount);
void withdrawing(account accountsData[100], int accountsCount);
void checkBalance(account accountsData[100], int accountsCount);
void transfer(account accountsData[100], int accountsCount);
void updateFile(account accountsData[100], int accountsCount);

void main()
{
	account accountsData[100];
	int accountsCount = 0;

	convertFromFileToArray(accountsData, accountsCount);

	while (true)
	{
		int choice;
		cout << "Choose 1 for investing." << endl; //внасяне
		cout << "Choose 2 for withdrawing." << endl; //теглене
		cout << "Choose 3 for balance check." << endl; //проверка на сметка
		cout << "Choose 4 for transfering" << endl; //прехвърляне
		cout << "Your choice: ";
		cin >> choice;

		switch (choice)
		{
		case 1:
			investing(accountsData, accountsCount);
			break;
		case 2:
			withdrawing(accountsData, accountsCount);
			break;
		case 3:
			checkBalance(accountsData, accountsCount);
			break;
		case 4:
			transfer(accountsData, accountsCount);
			break;
		}

		updateFile(accountsData, accountsCount); //след операция с пари update-ни файла
	}
}

void convertFromFileToArray(account accountsData[100], int &accountsCount)
{
	ifstream readFile;
	readFile.open("accounts.txt");

	string name; //променлива, взимаща името от един ред
	string sum; // променлива за сумата от един ред. string, защото файла е текстов

	//чети докато файла има редове и присвоявай прочетенето от линията на двете променливи
	while (readFile >> name >> sum)
	{
		name = name.substr(0, name.size() - 1); //махни ','

		accountsData[accountsCount].name = name;
		accountsData[accountsCount].sum = stod(sum); //от стринг (защото файла е текстов) към double
		accountsCount++;
	}
}

void investing(account accountsData[100], int accountsCount)
{
	string name;
	cout << "Account number: ";
	cin >> name;

	double money;
	cout << "Money: ";
	cin >> money;

	for (int i = 0; i < accountsCount; i++)
	{
		if (accountsData[i].name == name)
		{
			accountsData[i].sum += money;
			break;
		}
	}
}

void withdrawing(account accountsData[100], int accountsCount)
{
	string name;
	cout << "Account number: ";
	cin >> name;

	double money;
	cout << "Money: ";
	cin >> money;

	for (int i = 0; i < accountsCount; i++)
	{
		if (accountsData[i].name == name)
		{
			accountsData[i].sum -= money;
			break;
		}
	}
}

void checkBalance(account accountsData[100], int accountsCount)
{
	string name;
	cout << "Account number: ";
	cin >> name;

	for (int i = 0; i < accountsCount; i++)
	{
		if (accountsData[i].name == name)
		{
			cout << "Your current balance is: " << accountsData[i].sum << endl;
			break;
		}
	}
}

void transfer(account accountsData[100], int accountsCount)
{
	string from;
	cout << "From (account number): ";
	cin >> from;

	string to;
	cout << "To (account number): ";
	cin >> to;

	double money;
	cout << "Money: ";
	cin >> money;

	for (int i = 0; i < accountsCount; i++)
	{
		if (accountsData[i].name == from)
		{
			accountsData[i].sum -= money;
		}

		if (accountsData[i].name == to)
		{
			accountsData[i].sum += money;
		}
	}
}

void updateFile(account accountsData[100], int accountsCount)
{
	ofstream writeOnFile; //променлива за запис(писане) върху файла

	writeOnFile.open("accounts.txt"); //изтрива досегашното съдържание и позволява да пишем

	for (int i = 0; i < accountsCount; i++)
	{
		writeOnFile << accountsData[i].name << ", " << accountsData[i].sum << '\n';
	}
}