/*
File: AuthenticationManagementService.cpp
Description: Implementation file containing the method definitions of the
			 AuthenticationManagementService class, including logout and
			 password change logic.
Author: Trenser
Date:19-May-2026
*/

#include <stdexcept>
#include "AuthenticationManagementService.h"
#include "User.h"

User* AuthenticationManagementService::m_authenticatedUser = nullptr;

/*
Function: login
Description: Authenticates a user by checking the provided username and password
			 against the stored users in the DataStore. If successful, sets the
			 authenticated user.
Parameter: const std::string& username - user’s username
		   const std::string& password - user’s password
Return type: bool - true if login successful, false otherwise
*/
bool AuthenticationManagementService::login(const std::string& username, const std::string& password)
{
	util::Map<std::string, User*> users = m_dataStore.getUsers();
	int usersMapSize = users.getSize();
	for (int index = 0; index < usersMapSize; index++)
	{
		User* user = users.getValueAt(index);
		if (username == user->getUserName())
		{
			if (password == user->getPassword())
			{
				m_authenticatedUser = user;
				return true;
			}
			return false;
		}
	}
	return false;
}

/*
Function: getAuthenticatedUser
Description: Retrieves the currently authenticated user.
Parameter: None
Return type: User* - pointer to the authenticated user
*/
User* AuthenticationManagementService::getAuthenticatedUser()
{
	return m_authenticatedUser;
}

/*
Function: logout
Description: Logs out the currently authenticated user by clearing the
			 static authenticated user pointer.
Parameter: None
Return type: void
*/
void AuthenticationManagementService::logout()
{
	m_authenticatedUser = nullptr;
}

/*
Function: changePassword
Description: Changes the password of the currently authenticated user.
			 Throws an exception if no user is logged in.
Parameter: const std::string& newPassword - new password to set
Return type: void
*/
void AuthenticationManagementService::changePassword(const std::string& newPassword)
{
	if (m_authenticatedUser == nullptr)
	{
		throw std::runtime_error("There is no user currently logged in!");
	}
	m_authenticatedUser->setPassword(newPassword);
}