#include<fstream>
#include<conio.h>
#include<stdio.h>
#include<math.h>
#include<string.h>
#include<process.h>
#include<iostream>
#include<stdlib.h>

using namespace std;

void clrscr()               //Implementing clrscr() in C++ GNU GCC COMPILER
{
    system("cls");
}



class train
{
public:
    int tno;
    char tname[100];
    char source[100];
    char dest[100];
    int PerSeatFare;

public:
    void getdetail()
    {
        cout<<"Enter the details as follows\n";
        cout<<"Train no:";
        cin>>tno;
        cin.ignore();
        cout<<"Train name:";
        gets(tname);
        cout<<"Train Source Station:";
        gets(source);
        cout<<"Tarin Destination Station:";
        gets(dest);
        cout<<"Fare per seat in train :";
        cin>>PerSeatFare;
    }
    void showdetail()
    {
        cout<<tno<<"\t"<<tname<<"\t"<<source<<"\t"<<dest<<"\t";
        cout<<PerSeatFare;
    }
}t;
void storetrain()
{
    fstream f;
    train t;
    f.open("trains.dat",ios::app | ios::binary);
    t.getdetail();
    f.write((char*)&t,sizeof(t));
    f.close();
}
void showalltrain()
{
    fstream f;
    f.open("trains.dat",ios::in | ios::binary);
    train t;
    while(f.read((char*)&t,sizeof(t)))
    {
        t.showdetail();
        cout<<endl;
    }
    getch();
    f.close();
}

class reserv            //Assume that cust select train according to his source and destination.
{

public:
    int pnr;
    int tno;
    char tname[100];
    char pnames[10][100];
    int ages[10];
    int SeatNum;
    int i;
    int d,m,y;
    float amt;
    char bp[100],dest[100];
    void updt_tick()
    {
        fstream f;
        f.open("train.dat",ios::in | ios::binary);
        while(f.read((char*)&t,sizeof(t)))
        {
            if (tno==t.tno)
            {
                strcpy(bp,t.source);
                strcpy(dest,t.dest);
                strcpy(tname,t.tname);
                amt=SeatNum*t.PerSeatFare;
                break;
            }
        }
        f.close();
    }

public:
    void getresdet()
    {
        cout<<"Enter the details as follows\n";
        cout<<"Train no:";
        cin>>tno;
        cout<<"No of seats required:";
        cin>>SeatNum;
        cin.ignore();
        for(i=0; i<SeatNum ; i++)
        {
            cout<<"Passenger name:";
            gets(pnames[i]);
            cout<<"Passenger age:";
            cin>>ages[i];
            cin.ignore();
        }
        cout<<"Date of travel:";
        cin>>d>>m>>y;
        cout<<"Details Accepted\n";
        pnr=rand();
        updt_tick();
    }
    void showresdet()
    {
        cout<<"Pnr no:"<<pnr;
        cout<<"\nTrain no:"<<tno;
        cout<<"\nTrain name:";
        puts(tname);
        cout<<"Boarding point:";
        puts(bp);
        cout<<"Destination pt:";
        puts(dest);
        cout<<"No of seats reserved:"<<SeatNum;
        for(i=0; i<SeatNum; i++)
        {
            cout<<"Passenger name:";
            puts(pnames[i]);
            cout<<"Passenger age:"<<ages[i];
        }
        cout<<"\nDate of reservation:"<<d<<"-"<<m<<"-"<<y;
        cout<<"\nYou must pay:"<<amt<<endl;
    }
    int getpnr()
    {
        return pnr;
    }
};
void showticketbypnr()
{
    fstream f;
    reserv r;
    int flag=0,pnr;
    cout<<"\nPlease enter your PNR :";
    cin>>pnr;
    f.open("reservations.dat",ios::in | ios::binary);
    while(f.read((char*)&r,sizeof(r)))
    {
        if(pnr==r.getpnr())
        {
            cout<<"Your details are as follows :\n";
            r.showresdet();
            flag=1;
            break;
        }
    }
    if(flag==0)
    {
        cout<<"This PNR was not found in our database !";
    }
    f.close();
    getch();
}
void bookticket()
{
    reserv r;
    fstream f;
    f.open("reservations.dat",ios::app | ios::in | ios::binary);
    r.getresdet();
    f.write((char*)&r,sizeof(r));
    cout<<"Ticket is Booked";
    cout<<"Your details are as follows :\n";
    r.showresdet();
    getch();
    f.close();
}
void menu()
{
    int opt,opt1,opt2;
    while(1){
    clrscr();
    cout<<"1.)Administrator Menu\n2.)Passenger Menu\n3.)Exit\n\nEnter your choice :";
    cin>>opt;
    if(opt==3)
        exit(0);
    else if(opt==1)
    {
        clrscr();
        cout<<"1.)Add new train to database\n2.)Show all trains in database\n3.)Modify a train information\n4.)Exit\n\nEnter your choice :";
        cin>>opt1;
        switch(opt1)
        {
            case 1:storetrain();
                   break;
            case 2:showalltrain();
                   break;
            case 3:break;
            default:cout<<"Inavalid choice";
        }
    }
    else if(opt==2)
    {
        clrscr();
        cout<<"Passenger Menu";
        cout<<"\n\n\t1.)Book a Ticket\n\t2.)Check ticket info by pnr\n\t3.)Exit";
        cin>>opt2;
        switch(opt2)
        {
            case 1:bookticket();
                   break;
            case 2:showticketbypnr();
                   break;
            case 3:
            default:break;
        }
    }


    }   //Outermost while bracket
}
int main()
{
    clrscr();
    /*train t;
    //storetrain();
    //storetrain();
    showalltrain();
    reserv r;
    bookticket();*/
    menu();
    return 0;
}