/**
 *
 *  @author Tołpa Łukasz S15525
 *
 */

package KOL2;


import java.io.FileNotFoundException;

public class Main {

  public static void main(String[] args)  {
    CustomersPurchaseSortFind cpsf = new CustomersPurchaseSortFind();
    String fname = System.getProperty("user.home") + "/customers.txt";
    try {
      cpsf.readFile(fname);
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    }
    cpsf.showSortedBy("Nazwiska");
    cpsf.showSortedBy("Koszty");

    String[] custSearch = { "c00001", "c00002" };

    for (String id : custSearch) {
      cpsf.showPurchaseFor(id);
    }
  }

}
/**
 * @author Tołpa Łukasz S15525
 */

package KOL2;


import java.util.HashMap;
import java.util.Map;

public class Purchase {
    String m_id;
    String m_name;
    String m_article;
    double m_price;
    double m_quantity;
    double m_overallPrice;
    public Map<String, String> sortingData = new HashMap<String, String>();

    public Purchase(String id, String name, String article, double price, double quantity) {
        m_id = id;
        m_name = name;
        m_article = article;
        m_price = price;
        m_quantity = quantity;
        m_overallPrice = m_price * m_quantity;
        sortingData.put("Name", m_name.split(" ")[0]);
        sortingData.put("Price", String.valueOf(m_overallPrice));
        sortingData.put("ID", m_id);
    }

    public String toString() {
        return m_id + ";" + m_name + ";" + m_article + ";" + m_price + ";" + m_quantity;
    }
}
/**
 * @author Tołpa Łukasz S15525
 */

package KOL2;


import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;

public class CustomersPurchaseSortFind {
    List<Purchase> m_list = new ArrayList<>();

    public void readFile(String fname) throws FileNotFoundException {
        String id_klienta;
        String imieNazwisko;
        String nazwaTowaru;
        double cena;
        double ilosc;
        File file = new File(fname);
        Scanner in = new Scanner(file);
        while (in.hasNextLine()) {
//            id_klienta = in.next();
//            imieNazwisko = in.next();
//            nazwaTowaru = in.next();
//            cena = in.next();
//            ilosc = in.next();
//            m_list.add(new Purchase(id_klienta,imieNazwisko,nazwaTowaru,cena,ilosc));
            String line = in.nextLine();
            String[] parts = line.split(";");
            id_klienta = parts[0];
            imieNazwisko = parts[1];
            nazwaTowaru = parts[2];
            cena = Double.parseDouble(parts[3]);
            ilosc = Double.parseDouble(parts[4]);
            m_list.add(new Purchase(id_klienta,imieNazwisko,nazwaTowaru,cena,ilosc));
        }
    }

    public void showSortedBy(String objectSort) {
        String sortBy = null;
        if (objectSort.equals("Nazwiska")) {
            sortBy = "Name";
        } else if (objectSort.equals("Koszty")) {
            sortBy = "Price";
        }

        PurchaseComparator pc = new PurchaseComparator();
        pc.sortBy(sortBy);

        Collections.sort(m_list, pc);

        System.out.println(objectSort);
        for (Purchase p : m_list) {
            System.out.println(p.m_id + ";" + p.m_name + ";" + p.m_article + ";" + p.m_price + ";" + p.m_quantity + (sortBy == "Price" ? (" (koszt: " + p.m_overallPrice + ")") : ""));
        }
        System.out.println();
    }

    public void showPurchaseFor(String id) {
        System.out.println("Klient " + id);
        for (Purchase p : m_list) {
            if (p.m_id.equals(id)) {
                System.out.println(p.m_id + ";" + p.m_name + ";" + p.m_article + ";" + p.m_price + ";" + p.m_quantity);
            }
        }
        System.out.println();
    }
}
package KOL2;

import java.util.Comparator;

class PurchaseComparator implements Comparator<Purchase>
{
    String m_sortBy;

    public void sortBy(String sortBy) {
        m_sortBy = sortBy;
    }

    public int compare(Purchase a, Purchase b)
    {
        String av = a.sortingData.get(m_sortBy);
        String bv = b.sortingData.get(m_sortBy);
        int comparison = m_sortBy == "Price" ? (new Double(bv)).compareTo(new Double(av)) : av.compareTo(bv);

        if(m_sortBy == "Name" && comparison == 0) {
            return a.sortingData.get("ID").compareTo(b.sortingData.get("ID"));
        }
        return comparison;
    }
}