package lab05;
import java.util.Scanner;
import java.io.*;
import javax.swing.JOptionPane;

public class Main {

//Programmer:       Kevin Thayer
//Date Due:         October 14, 2008
//Project Number:   5
//Project Name:     Inventory Tracker
//Project Describition:
//      This program will be used to track inventory. The program will load the
//      inventory data from a data file and will read transactions from a
//      seperate transaction file. Once the inventory has ben updated, the
//      program should display a product order report and should rewrite the
//      orginal inventory file with the new, updated data.
    
    public static void main(String[] args)throws IOException {
        Scanner kbd = new Scanner(System.in);
        String name;
        String name2;
        double quantity;
        double price;
        double shelf;
        double reorder;
        double quantitySold;
        double orderAmount;
        String inputFileName;
        String inputFileName2;
        
        //Get File Names
        inputFileName = GetFileName();
        inputFileName2 = GetFileName();
        
        //Process Inventory Update
        //Get Inventory Item
        File inFileHandle = new File(inputFileName);
        Scanner inFile = new Scanner (inFileHandle);
        
        // Order Report Heading
        System.out.println("Product Reorder Report:");
        System.out.println("Product Name\t" + "Order Amount");
        
        while(inFile.hasNext()) {
            name = GetEntry(inFile);
            quantity = Double.parseDouble(GetEntry(inFile));
            price = Double.parseDouble(GetEntry(inFile));
            shelf = Double.parseDouble(GetEntry(inFile));
            reorder = Double.parseDouble(GetEntry(inFile));
            
           inFile.close();
          
           File inFileHandle2 = new File (inputFileName2);
           Scanner inFile2 = new Scanner (inFileHandle2);
      
           name2 = GetEntry(inFile2);
           quantitySold = Double.parseDouble(GetEntry(inFile2));
          
           inFile2.close();
          
           //Update Inventory
           quantity = quantity - quantitySold;
          
           if(quantity <= reorder){
              // How Much to Order
              orderAmount = shelf - quantity;
              
              System.out.println(name2 + "\t" + orderAmount);
           }
           FileWriter appendFile = new FileWriter("C:/Users/Kevin/Desktop/inventory2.txt", true);
           PrintWriter outFile = new PrintWriter(appendFile);
          
           outFile.println(name);
           outFile.println(quantity);
           outFile.println(price);
           outFile.println(shelf);
           outFile.println(reorder);
          
           outFile.close();
        }
        
      
    }

    public static String GetFileName() {
        String fName;
        fName = JOptionPane.showInputDialog(null, "Please enter a file name.");
        return fName;
    }

    public static String GetEntry(Scanner inFile) {
        throw new UnsupportedOperationException();
    }
      
}

name = GetEntry(inFile);

   public static String getEntry(Scanner inFile) {
        return inFile.nextLine();
    }