src/main/java/Main.java

@@ -2,10 +2,14 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.InputMismatchException;
 import java.util.Scanner;
 
 public class Main {
+
     static ArrayList<Product> productCatalog = new ArrayList<>();
+
+
     public static void loadProducts() throws IOException{
         InputStream input = Main.class
                 .getClassLoader()
@@ -15,6 +19,20 @@ public class Main {
         }
         Scanner scanner = new Scanner(input);
 
+        while (scanner.hasNextLine()){
+            String line = scanner.nextLine();
+            String[] lines = line.split(",");
+
+            int id = Integer.parseInt(lines[0]);
+            String name = lines[1];
+            double price = Double.parseDouble(lines[2]);
+
+            Product product = new Product(id , name , price);
+            productCatalog.add(product);
+            
+        }
+
+
         // TODO:
         // - Read each line from products.csv
         // - For each line, parse productId, name, and price

src/main/java/ReportGenerator.java

@@ -1,4 +1,8 @@
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.PrintWriter;
 import java.util.List;
+import java.util.Scanner;
 
 public class ReportGenerator {
 
@@ -17,6 +21,65 @@ public class ReportGenerator {
 
     public void processFile()
     {
+        File inputfile = new File(ordersFilePath);
+        Scanner input = null;
+        try {
+            input = new Scanner(inputfile);
+        } catch (FileNotFoundException e) {
+            System.out.println("there is no csv file to open it");;
+        }
+
+        while (input.hasNextLine()){
+            
+            input.useDelimiter(",");
+            
+            try{
+                int id = input.nextInt();
+                int quantity = input.nextInt();
+                int discount = input.nextInt();
+                if(quantity<0 || discount<0 || discount>= 100 || id <= 0 || id > 9){
+                    totalInvalidLines++;
+                    continue;
+                }
+
+                double priceOfproduct = 0;
+                for (Product p : productList){
+                    if(id == p.getProductID()){
+                        priceOfproduct = p.getPrice();
+                    }
+                }
+
+                if(priceOfproduct == 0){
+                    totalInvalidLines++;
+                    continue;
+                }
+
+                double subtotal = quantity * priceOfproduct;
+                double discountValue = subtotal * discount / 100 ;
+                double finalCost = subtotal - discountValue;
+
+
+                totalQuantity += quantity;
+                totalFinalCost += finalCost;
+                totalDiscountValue += discountValue;
+
+
+
+
+
+
+
+
+            }catch (NumberFormatException e){
+                totalInvalidLines++;
+                continue;
+            }
+            
+
+
+        }
+
+        input.close();
         // TODO:
         // 1. Open the order details CSV file
         // 2. Read the file line by line
@@ -59,6 +122,20 @@ public class ReportGenerator {
 
     public void saveReport()
     {
+
+
+        try {
+            PrintWriter report = new PrintWriter("Report.txt");
+            report.println("=======REPORT========");
+            report.println("Totsl Quantity sold :" + totalQuantity);
+            report.println("Toal final cost: $" + totalFinalCost);
+            report.println("TOtal discount value : $" + totalDiscountValue);
+            report.println("Invalid rows: " + totalInvalidLines);
+            report.println("=====================");
+
+        } catch (FileNotFoundException e) {
+            throw new RuntimeException(e);
+        }
         // TODO:
         // 1. Build a formatted report string
         // 2. Include: