import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.Scanner;

class Directory implements Comparable<Object> {
    int id;
    String name;
    String address;
    int phoneNo;

    public int getId(){
        return id;
    }

    public void setId(int id){
        this.id = id;
    }

    public String getName(){
        return name;
    }

    public void setName(String name){
        this.name = name;
    }

    public String getAddress(){
        return address;
    }

    public void setAddress(String address){
        this.address = address;
    }

    public int getPhoneNo(){
        return phoneNo;
    }

    public void setPhoneNo(int phoneNo){
        this.phoneNo = phoneNo;
    }

    @Override
    public int compareTo(Object ob) throws ClassCastException{
        if(!(ob instanceof Directory))
            throw new ClassCastException("Error");
        int ide = ((Directory) ob).getId();
        return this.id - ide;
    }
}

public class TelephoneDirectory {

    public static void main(String[] args) throws Exception{
        Scanner scan = new Scanner(System.in);
        int menu = 0;
        System.out.println("Telephone Directory Management System");
        System.out.println();
        System.out.println("1. Accept Data");
        System.out.println("2. Search");
        System.out.println("3. Sort Data");
        System.out.println("4. List of all persons");
        System.out.println("5. Exit");
        boolean quit = false;
        do{
            System.out.print("Please enter your choice: ");
            menu = scan.nextInt();
            System.out.println();

            switch (menu){
            case 1:
                System.out.print("Enter student ID: ");
                int ID = scan.nextInt();
                System.out.print("Enter Name: ");
                String name = scan.next();
                System.out.print("Enter Address: ");
                String address = scan.next();
                System.out.println("Enter Phone No: ");
                int no = scan.nextInt();
                FileWriter fw = new FileWriter(new File("directory.txt"), true);
                BufferedWriter out = new BufferedWriter(fw);
                out.write(ID + " " + name + " " + address + " " + no);
                out.newLine();
                out.close();
                break;
            case 2:
                System.out.print("Enter name to search information: ");
                String n = scan.next();
                File f = new File("directory.txt");
                try{
                    BufferedReader freader = new BufferedReader(new FileReader(
                            f));
                    String s;
                    while ((s = freader.readLine()) != null){
                        String[] st = s.split(" ");
                        @SuppressWarnings ("unused")
                        String id = st[0]; // UNUSED
                        String nm = st[1];
                        String add = st[2];
                        String phoneNo = st[3];
                        if(n.equals(nm)){
                            System.out
                                    .println("***********Information**************");
                            System.out.println("Address : " + add);
                            System.out.println("PhoneNo : " + phoneNo);
                        }
                    }
                    freader.close();
                }catch(Exception e){}
                break;
            case 3:
                File file = new File("directory.txt");
                FileInputStream fstream = new FileInputStream(file);
                DataInputStream in = new DataInputStream(fstream);
                BufferedReader br = new BufferedReader(
                        new InputStreamReader(in));
                String strLine;
                ArrayList<String> list = new ArrayList<String>();
                while ((strLine = br.readLine()) != null){
                    list.add(strLine);
                }
                int j = 0;
                Directory data[] = new Directory[list.size()];
                try{
                    Iterator<String> itr;
                    for(itr = list.iterator(); itr.hasNext();){
                        String str = itr.next().toString();
                        String[] splitSt = str.split(" ");
                        String id = "", nn = "", add = "", pno = "";
                        for(int i = 0; i < splitSt.length; i++){
                            id = splitSt[0];
                            nn = splitSt[1];
                            add = splitSt[2];
                            pno = splitSt[3];

                        }
                        data[j] = new Directory();
                        data[j].setId(Integer.parseInt(id));
                        data[j].setName(nn);
                        data[j].setAddress(add);
                        data[j].setPhoneNo(Integer.parseInt(pno));

                        j++;
                    }

                    @SuppressWarnings ("unused")
                    BufferedWriter bw = new BufferedWriter(new FileWriter(file,
                            true)); // UNUSED
                    Arrays.sort(data);
                    System.out.println("********Sorted by id********");
                    @SuppressWarnings ("unused")
                    String strVal = ""; // UNUSED
                    for(int i = 0; i < 8; i++){
                        Directory show = data[i];
                        int ide = show.getId();
                        String nnn = show.getName();
                        String add = show.getAddress();
                        int phone = show.getPhoneNo();
                        System.out.println(ide + " " + nnn + " " + add + " "
                                + phone);
                    }
                }catch(Exception e){}
                break;

            case 4:
                FileInputStream fis = new FileInputStream(new File(
                        "directory.txt"));
                DataInputStream dis = new DataInputStream(fis);
                BufferedReader reader = new BufferedReader(
                        new InputStreamReader(dis));
                String st;
                ArrayList<String> al = new ArrayList<String>();
                while ((st = reader.readLine()) != null){
                    al.add(st);
                }
                Iterator<String> itr;
                for(itr = al.iterator(); itr.hasNext();){
                    String str = itr.next().toString();
                    String[] splitSt = str.split(" ");
                    String id = "", na = "", ada = "", ph = "";
                    for(int i = 0; i < splitSt.length; i++){
                        id = splitSt[0];
                        na = splitSt[1];
                        ada = splitSt[2];
                        ph = splitSt[3];
                    }
                    System.out.println(id + " " + na + " " + ada + " " + ph);
                }
                break;
            case 5:
                quit = true;
                break;
            default:
                System.out.println("Invalid Entry!");
            }
        }while (!quit);
    }
}