#include <iostream>
#include<string.h>
#include<fstream>
#include <vector>
#include <algorithm> // This is where you find std::sort
#include <iostream>
#include <fstream>
#include <stdio.h>
using namespace std;

#define IN 1
#define OUT 0

int id_arr[50];
int size=0;
struct
{
  int bid;
  char bname[25] ;
  char author[25];
  int noofcopies;
int status;

}book;

FILE *librecord;

void insert();
void update();
void SearchBook();
void request();
void DisplayBook();

char info[500];


int main()
{


    string uname,pwd;
    int ch;

    cout << "\t \n Library management System \n" ; // prints !!!Hello World!!!
    cout<<"\n Enter Username : ";
    cin>>uname;
    cout<<"\n Enter Password : ";
    cin>>pwd;


    if(uname=="admin123" && pwd=="admin123")
    {
    cout<<"\nYou are logged in as Librarian !!! \n";

    while(1)
    {
    cout<<"\n 1.Insert Book";
    cout<<"\n 2.Display Book";
    cout<<"\n 3.Search Book";
    cout<<"\n 4.Log out";
    cout<<"\n Enter your choice ???";
    cin>>ch;

        switch(ch)
        {
        case 1:
        insert();
        break;

        case 2:
        DisplayBook();
        break;

        case 3:
        SearchBook();
        break;

        case 4:
        return 0;
        break;

        default:
        cout<<"Invalid choice...!";
        }

    }
    }

    if(uname=="student123" && pwd=="student123")
    {
    cout<<"\nYou are logged in as Student !!! \n\n";
    while(1)
    {
    cout<<"\n 1.Search Book";
    cout<<"\n 2.log out\n";
    cout<<"\n Enter your choice ???";
    cin>>ch;

        switch(ch)
        {
        case 1:
        SearchBook();
        break;

        case 2:
        return 0;

        default:
        cout<<"Invalid choice...!";
        }
    }
    }

    return 0;
}



void insert()
{
    int i=0;book.status=IN;

            //opening the librecord file
    librecord = fopen("librecord.txt","a+");

    cout<<"Enter The Name of The Book :\n";
    cin>>book.bname;
    cout<<"Enter The uniqueid of The Book :(Integer) \n";
    cin>>book.bid;
        id_arr[i]=book.bid;
    i++;
    size++;
    cout<<"Enter The Name of Author :\n";
    cin>>book.author;
    cout<<"Enter The Number of copies Of The Book:(Integer)\n";
    cin>>book.noofcopies;
    fprintf(librecord,"\n%s\t%d\t%s\t%d\t",book.bname,book.bid,book.author,book.noofcopies);
    fclose(librecord);
    cout<<"A New Book has been Added Successfully...\n";

}


void SearchBook()
{
    for(int i=0;i<size;i++){
        cout<<id_arr[i];
    }

}

void DisplayBook()
{
    librecord = fopen("librecord.txt","a+");
    cout<<"\nName\tBookid\tAuthor\tCopies\n";
    while(!feof(librecord))
    {
        fgets(info,500,librecord);
        cout<<info;
    }
    fclose(librecord);

}