package unimap;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

public class executer
{
	BufferedReader reader;
	int choice;
	student s;
	product p;
	ArrayList<student> students;
	public executer()
	{
		reader=new BufferedReader(new InputStreamReader(System.in));
		choice=0;
		students=new ArrayList<student>();
		menu();
	}
	public static void clearScreen()
	{
		for (int i=1; i<=10; i++)
		    System.out.println("\n");
	}
	public void menu()
	{
		do
		{
			clearScreen();
			System.out.println("Welcome !");
			System.out.println("1. Add Student");
			System.out.println("2. List Students");
			System.out.println("3. Search Students");
			System.out.println("4. Write To File");
			System.out.println("5. Read From File");
			System.out.println("0. Exit");
			System.out.println("Enter your choice");
			try
			{
				choice=Integer.parseInt(reader.readLine());
				if(choice==1)
				{
					getstudent();
				}
				else if(choice==2)
				{
					liststudents();
				}
				else if(choice==3)
				{
					searchstudent();
				}
				else if(choice==4)
				{
					writetofile();
				}
				else if(choice==5)
				{
					readfromfile();
				}
				else
				{;}
			}
			catch(IOException e)
			{
				e.printStackTrace();
			}

		}while(choice!=0);
	}
	private void searchstudent()
	{

		try
		{
			String sname;
			boolean flag=false;
			System.out.println("Student Name");
			sname=reader.readLine();
			for(student s:students)
			{
				if(s.sname.equals(sname))
				{
					flag=true;
					System.out.println("Found..");
					System.out.println(s.snumber+","+s.sname+","+s.sbcode+","+s.sbname);
				}
			}
			if(flag==false)
			{
				System.out.println("Not Found..");
			}
			reader.readLine();
		}
		catch(IOException e)
		{
			e.printStackTrace();
		}

	}
	private void getstudent()
	{
		try
		{
			int snumber;
			String sname,sbcode,sbname;
			System.out.println("Student Number");
			snumber=Integer.parseInt(reader.readLine());
			System.out.println("Student Name");
			sname=reader.readLine();
			System.out.println("Subject Code");
			sbcode=reader.readLine();
			System.out.println("Subject Name");
			sbname=reader.readLine();
			s=new student(snumber,sname,sbcode,sbname);
			students.add(s);
		}
		catch(IOException e)
		{
			e.printStackTrace();
		}

	}
	private void readfromfile()
	{
		try
		{
			File file = new File("file.txt");
            FileReader fileReader = new FileReader(file);
            BufferedReader bufferedReader = new BufferedReader(fileReader);
            String line;
            while ((line = bufferedReader.readLine()) != null)
            {
            	System.out.println(line);
            }
            bufferedReader.close();
			reader.readLine();
		}
		catch(IOException e)
		{
			e.printStackTrace();
		}

	}
	private void writetofile()
	{
		try
		{
			File file =new File("file.txt");
			FileWriter fileWritter = new FileWriter(file.getName(),true);
	        BufferedWriter bufferWritter = new BufferedWriter(fileWritter);
			for(student s:students)
			{
				String student=s.snumber+","+s.sname+","+s.sbcode+","+s.sbname;
		        bufferWritter.write(student);
		        bufferWritter.newLine();
			}
			bufferWritter.close();
			System.out.println("Write Done..");
			reader.readLine();
		}
		catch(IOException e)
		{
			e.printStackTrace();
		}
	}
	private void liststudents()
	{
		for(student s:students)
		{
			System.out.println(s.snumber+","+s.sname+","+s.sbcode+","+s.sbname);
		}
		try
		{
			reader.readLine();
		}
		catch(IOException e)
		{
			e.printStackTrace();
		}
	}
	public static void main(String k[])
	{
		new executer();
	}
}