#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
#include <cstdlib>
#include <ctime>
#include <windows.h>
using namespace std;
void rgs();
void Menu();
void Login();
void monsters();
void loading();

int ans1, cLevel, cExp;
string charname, pw, user, pass;
bool access;


int main()
{
	loading();
	Sleep(3000);
	system("CLS");
	Menu();
	system("CLS");
	if (ans1==1)
	{
		Login();
	}
	else if (ans1==2)
	{
		rgs();
		system("CLS");
		Menu();
	}
	else
	{
		cout<<"You have entered an invalid option"<<endl;
	}
	system ("pause");
	return 0;
}
void Login()
{
	cout<<"Please enter your charater name: ";
	cin>>user;
	cout<<"Please enter your password: ";
	cin>>pass;


	ifstream inFile;
    string username, password;
    inFile.open("users.txt");
    if (inFile.is_open())
    {
        while (!inFile.eof())
        {
            inFile >>username>>password>>cLevel>>cExp;
            if (user==username && pass==password)
			{
				access=true;
				break;
			}
		}
		if (access)
		{
			cout<<"You have login successfully!"<<endl;

			monsters();
		}
		else
		{
			cout<<"You have enter the wrong username/password!"<<endl;
			system("CLS");
			Login();
		}
	}
	else
	{
		cout<<"Error!"<<endl;
	}
	inFile.close();


}

void Menu()
{
	cout<<"Welcome to dungeon hunter!"<<endl;
	cout<<"Choose a choice below."<<endl;
	cout<<"1. Login"<<endl;
	cout<<"2. Register a new account"<<endl;
	cout<<"Please enter your option: ";
	cin>>ans1;
}

void rgs()
{
	ifstream inFile;
    ofstream newuser;
    string username, password, passwordconfirm;
    inFile.open("users.txt", ios::app);
    newuser.open("users.txt", ios::app);
    bool uservalid=false;
    while (!uservalid)
    {
        cout << "Username: ";
        cin >> username;
        cout << "Password: ";
        cin >> password;
        cout << "Confirm password: ";
        cin >> passwordconfirm;
        int m=0;
        int k=0;
        while (inFile>>user>>pass)
        {
            m++;
            if (username!=user)
                k++;
        }
        if (m==k && password==passwordconfirm)
            uservalid=true;
        else if (m!=k)
            cout << "There is already a user with this username." << endl;
        else
            cout << "The passwords given do not match." << endl;
    }
    newuser << username << " " << password << " 1 0" << endl;;
    inFile.close();
    newuser.close();
}

void monsters()
{
	ifstream monstersFile;
	int mLevel, mExpA, mExpB, mExp, hp, a, b;
	srand((unsigned int)time(NULL));//initialize random number generator;
	string monsters[10]={"Sandton","Tentacuno","Porypix","Snorbell","Paradon","Muqueen","Maromander","Nidodash","Hitmonchop","Voltchamp"};
	int r = rand()%10+1; //generate a number between 1-1

	monstersFile.open("monsters.txt");
	if(!monstersFile)
		cout<<"Not able to open text file\n";
	else
	{
		cout<<left<<setw(15)<<"Name"<<setw(15)<<"Level"<<setw(15)<<"HP"<<"EXP"<<endl;
		while(!monstersFile.eof())
		{
			monstersFile>>mLevel>>mExpA>>mExpB>>hp;
			if(monstersFile.fail())
			{
				break;
			}
			else
			{
				if(cLevel==mLevel)
				{
					mExp=rand()%(mExpB-mExpA+1)+mExpA;
					cout<<left<<setw(15)<<monsters[r]<<setw(15)<<mLevel<<setw(15)<<hp<<mExp<<endl;
				}

			}

		}

	}
	monstersFile.close();
}

void edit()
{
	string user,pass,search;
	int lvl, exp, nexp;
	ifstream ifile ("users.txt");
	ofstream ofile ("users2.txt");
	cout<<"You username! ";
	cin>>search;
	cout<<"your exp gained ";
	cin>>nexp;
	while (!ifile.eof())
	{
		ifile>>user>>pass>>lvl>>exp;
		if(user==search)
		{

			ofile<<endl<<user<<" "<<pass<<" "<<lvl<<" "<<nexp;
		}
		else
        {
            ofile<<endl<<user<<" "<<pass<<" "<<lvl<<" "<<exp;
        }
	}
	cout<<"\r";
	ifile.close();
	ofile.close();
	remove("users.txt");
	int result=rename("users2.txt","users.txt");
	if (result==0)
		cout<<"File successfully renamed\n";
	else
	{
		while (result==0)
		{
			cout<<"Error renaming file, Retrying\n";
			result=rename("users2.txt","users.txt");
		}
	}
}

void loading()
{
    cout << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)255 << (char)255 << (char) 255<< (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << endl;
    cout << (char)178 << (char)178 << (char)178 << (char)255 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)255 << (char)178 << (char)178 << (char)178 << endl;
    cout << (char)178 << (char)178 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)178 << (char)178 << endl;
    cout << (char)178 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)178 << endl;
    cout << (char)178 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)178 << endl;
    cout << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << endl;
    cout << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)178 << (char)178 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << endl;
    cout << (char)255 << (char)255 << (char)255 << (char)255 << (char)255 << (char)255 << (char)178 << (char)178 << (char)255 << (char)255 << (char)255 << (char)255 << (char)255 << (char)255 << endl;
    cout << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << endl;
    cout << (char)178 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)178 << endl;
    cout << (char)178 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)178 << endl;
    cout << (char)178 << (char)178 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)178 << (char)178 << endl;
    cout << (char)178 << (char)178 << (char)178 << (char)255 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)255 << (char)178 << (char)178 << (char)178 << endl;
    cout << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << (char)255 << (char)255 << (char)255 << (char)255 << (char)178 << (char)178 << (char)178 << (char)178 << (char)178 << endl;

}