#include "C:\Users\bhara\OneDrive\Documents\c ++ header files\std_lib_facilities.h"
#include <conio.h>


enum class Genre
{
    fiction=1,nonfiction,periodical,biography,children
};


class Book
{
public:

    void show_details();
    void rent();
    void set_ISBN(string& str) {ISBN = str;}
    void set_author(string& str) {author=str;}
    void set_title(string& str){title=str;}
    void set_cpydate(string& str){cpydate=str;}
    void set_genre(Genre& genr) {gen=genr;}
    void set_checkedout(bool b) {checkedout=b;}


    string ret_ISBN() {return ISBN;}
    string ret_author() {return author;}
    string ret_title() {return title;}
    string ret_cpydate() {return cpydate;}
    Genre ret_gen(){return gen;}
    bool ret_checkedout(){return checkedout;}

private:
    string ISBN,author,title,cpydate;
    Genre gen;
    bool checkedout{false};
    vector<Book>rack;
};

class Patron
{
public:
    Patron(): fees{0} {}
    void set_name(string& str) {name=str;}
    void set_libno(int& i){lib_cardno=i;}
    void set_fees(int &i) {fees=i;}


    string ret_name(){return name;}
    int ret_cardno(){return lib_cardno;}
    int ret_fees(){return fees;}

    void set_fee();
private:
    string name;
    int lib_cardno,fees;
};

struct Transaction
    {
        Book b;
        Patron p;
        //Date d;
    };

class Library
{
public:

    void set_rack(Book& b){rack.emplace_back(b);}
    void set_record(Patron& p){record.push_back(p);}

    vector<Book> ret_rack(){return rack;}
    vector<Patron> ret_record() {return record;}


private:
    vector<Book> rack;
    vector<Patron> record;
    vector<Transaction> Trans;
};

bool verify_ISBN(Library& l,string& ISBN);
void take_ISBN_details(Book& b,Library& l);
void take_patron_details(Patron& p,Library& l);
void rent(Library& l,Patron& p,Transaction& t);



int main()
{
    Book b; Library l; Patron p; Transaction t;
    int choice;
    while(true)
    {


        cout<<"Welcome to the library. "<<"\n"<<"Enter your choice(1,2,3)"<<"\n1. Enter a new book record"<<"\n2. Enter a new patron record"<<"\n3. Rent a book"<<endl;
        cin>>choice;
        cin.ignore();
        switch(choice)
        {
        case 1:
            take_ISBN_details(b,l);
            break;
        case 2:
            take_patron_details(p,l);
            break;
        case 3:
            rent(l,p,t);
            break;


            /* case 2:
                 b.show_details();
                 break;

             case 3:
                 b.rent();
                 break;
             }
             */
        }
    }
}

void take_ISBN_details(Book& b,Library& l)
{
    char c;
    do
    {

        bool flag{true};
        do
        {
            string str;
            cout<<"\nEnter ISBN: ";
            getline(cin,str);
            flag=verify_ISBN(l,str);               // changes needed here
        }
        while(!flag);

        if(flag)
        {
            string str; Genre gen;
            cout<<"\nISBN valid "<<endl; b.set_ISBN(str);
            cout<<"Enter author name: ";
            getline(cin,str); b.set_author(str);
            cout<<"Enter Title: ";
            getline(cin,str); b.set_title(str);
            cout<<"Enter copyright date: (dd/mm/yy)";
            getline(cin,str); b.set_cpydate(str);
            cout<<"Enter Genre(fiction,nonfiction,periodical,biography,children): ";
            cin>>str;
            if(str=="fiction") gen=Genre::fiction;
            else if(str=="nonfiction") gen=Genre::nonfiction;
            else if(str=="periodical") gen=Genre::periodical;
            else if(str=="biography") gen=Genre::biography;
            else if(str=="children") gen=Genre::children;
            b.set_genre(gen);
            l.set_rack(b);

        }
        cout<<"\nRecord updated. Enter another record?(y/n): ";
        cin>>c;
        cin.ignore();
    }
    while(c=='y');


    cout<<"Press any key to continue";
    getch();
    system("CLS");
}


bool verify_ISBN(Library& l,string& ISBN)
{
    int a{0};
    //check ISBN for format error n-n-n-x
    for(int i=0; i<ISBN.size(); ++i)
    {
        if(ISBN[i]=='-') ++a;
        if(a==0 || a==1 || a==2)
        {
            if(isalpha(ISBN[i]))
            {
                cout<<"\nInvalid ISBN"<<endl;
                return false;
                break;
            }
        }
        else if(a>3)
        {
            cout<<"\nInvalid ISBN"<<endl;
            return false;
            break;
        }
    }
    if(a==0 || a==1 || a==2)
    {
        cout<<"\nInvalid ISBN"<<endl;
        return false;
    }


    // check ISBN if duplicate
    for(auto& a:l.ret_rack())
    {
        if(a.ret_ISBN() == ISBN)
        {
            cout<<"\nDuplicate ISBN";
            cout<<"Press any key to continue";
            return false;
            getch();
            system("CLS");
        }
    }
    return true;
}



void take_patron_details(Patron& p,Library& l)
{
    char c;
    do
    {
        string str;
        int i;
        cout<<"Enter name: ";
        getline(cin,str);
        p.set_name(str);
        cout<<"Enter library number: ";
        cin>>i;
        p.set_libno(i);
        l.set_record(p);
        cout<<"\nRecord updated. Enter another record?(y/n): ";
        cin>>c;
        cin.ignore();
    }
    while(c=='y');
    cout<<"Press any key to continue";
    getch();
    system("CLS");
}


void rent(Library& l,Patron& p,Transaction& t)
{
    string name; bool flag{false}; bool b;
    cout<<"\nEnter the book name: "; getline(cin,name);
    for(auto& a:l.ret_rack())
    {
        if(name==a.ret_title() && a.ret_checkedout() ==true)
        {
            cout<<"Book already rented out "<<endl; flag=true;
            break;
        }
        if(name==a.ret_title() && a.ret_checkedout()==false)
        {
            b=true;
            a.set_checkedout(b);
            cout<<"\nBook rented"<<endl; flag=true;
            break;
        }

    }
    if(!flag) cout<<"\nBook not found"<<endl;
    cout<<"Press any key to continue"; getch();
    system("CLS");

}