#include <iostream>
#include <bits/stdc++.h>
#include<string.h>
#include<fstream>
using namespace std;
class Product
{
    int id;
    int price;
    char name[20];
public :

    void setId()
    {
        cout <<"Enter ID : ";
        cin >> id;
    }

    int getId()
    {
        return id;
    }

    void setPrice()
    {
        cout <<"Enter price : ";
        cin >> price;
    }

    int getPrice()
    {
        return price;
    }

    void setName()
    {
        cout << "Enter name : ";
        cin >> name ;
    }

    char* getName()
    {
        return name;

    }

};

void writeproduct()
{
    fstream out("product.txt", ios::out | ios::app );
    Product p1 ;
    char ch;
    do
    {
        p1.setId();
        p1.setName();
        p1.setPrice();

        out.write( (char*)&p1, sizeof(p1));
        cout <<"if you want to enter another data\tpress Y/N \n";
        cin >> ch ;
    }
    while( ch=='Y' || ch=='y');
    out.close();
}

void readproduct()
{
    Product p2;
    ifstream in;
    in.open ("product.txt", ios::in);
    if(in.is_open())
    {
        cout << "Id\tName\tPrice\n";
        while(!in.eof())
        {
            in.read( (char *) &p2, sizeof(p2));
            if(!in.eof())
                cout << p2.getId() << '\t' << p2.getName()<< '\t' << p2.getPrice() << "\n" ;
        }//in.close();
    }
    else
    {
        cout <<"Can't open the file \n";
    }


}

void searchproduct()
{

    Product p3;//creating new third object
    char str[10];
    bool found=false;
    cout<<"Enter name to search for :";
    cin>>str;
    fstream in2;//check this
    in2.open("product.txt",ios::in);//check this
    if(in2.is_open())
    {
        in2.read((char*)&p3,sizeof(p3));//read
        while(!in2.eof()) //check
        {
            if(strcmp(str,p3.getName())==0)
            {

                cout << p3.getId() << '\t' << p3.getName()<< '\t' << p3.getPrice() << "\n" ;//print
                found=true;

            }
            in2.read((char*)&p3,sizeof(p3));//read
        }
        if(!found)cout<<"Name not found\n";
        in2.close();

    }
    else cout<<"Cannot open this file"<<"\n";

}

void updateproduct()
{
    Product p;
    fstream f("product.txt",ios::in | ios::out);
    if(f.is_open())
    {
        char str[20];
        cout<<"Enter the product name to update his record ";
        cin>>str;
        bool found=false;
        while(!f.eof())
        {
            f.read((char*)&p,sizeof(p));
            if(strcmp(str,p.getName())==0)
            {
                cout<<"Enter the new price for "<<str<<" ";
                p.setPrice();
                int curpos=f.tellg();
                int stusize=sizeof(p);
                f.seekp(curpos-stusize,ios::beg);
                f.write((char*)&p,sizeof(p));
                found=true;
                break;
            }
        }
        f.close();
        if(!found)
            cout<<"Product name does not exist.";
    }
}

void delet()
{
    fstream in("product.txt",ios::in);
    ofstream out("Product Temp.txt",ios::out);
    Product p5;
        char str[20];
        cout<<"Enter the name of product to delete his record ";
        cin>>str;
    if(in.is_open())
    {

        while(in.read((char*)&p5,sizeof(p5)))
        {
            if(strcmp(str,p5.getName())!=0)
            {
                out.write((char*)&p5,sizeof(p5));
            }
        }
        in.close();
        out.close();
        remove("product.txt");
        rename("Product Temp.txt","product.txt");
    }
}

int main()
{


    // writeproduct();
     readproduct();

   // updateproduct();
    //readproduct();
    //searchproduct();
    //readproduct();
    //delet();
    //readproduct();


    return 0;
}