package hashmap;

import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashMap;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;

public class UpdateForm extends JFrame implements ActionListener {

	private JLabel lblTitle, lblStudentID, lblForename, lblSurname, lblSubject, lblResult, lblMessage;
	private JTextField txtStudentID, txtForename, txtSurname, txtResult;
	private JComboBox cmbSubject;
	private JButton btnFindStudent, btnUpdate, btnExit;
	private Container cn;

	private static HashMap<String, Student> privateMap;
	static Student foundItem;

	public UpdateForm(HashMap localMap)
	{
		privateMap = localMap;

		cn = getContentPane();
		cn.setLayout(new GridBagLayout());

		lblTitle = new JLabel("Student Results", JLabel.CENTER);
		lblTitle.setFont(new Font("SansSerif", Font.BOLD,17));
		lblTitle.setForeground(Color.decode("#00000"));

		lblStudentID = new JLabel("Student ID", JLabel.RIGHT);
		lblStudentID.setFont(new Font("SansSerif", Font.BOLD,17));
		lblStudentID.setForeground(Color.decode("#00000"));

		lblForename = new JLabel("Forename", JLabel.RIGHT);
		lblForename.setFont(new Font("SansSerif", Font.BOLD,17));
		lblForename.setForeground(Color.decode("#00000"));

		lblSurname = new JLabel("Surname", JLabel.RIGHT);
		lblSurname.setFont(new Font("SansSerif", Font.BOLD,17));
		lblSurname.setForeground(Color.decode("#00000"));

		lblSubject = new JLabel("Subject", JLabel.RIGHT);
		lblSubject.setFont(new Font("SansSerif", Font.BOLD,17));
		lblSubject.setForeground(Color.decode("#00000"));

		lblResult = new JLabel("Result", JLabel.RIGHT);
		lblResult.setFont(new Font("SansSerif", Font.BOLD,17));
		lblResult.setForeground(Color.decode("#00000"));

		lblMessage = new JLabel("Message will appear...", JLabel.RIGHT);
		lblMessage.setFont(new Font("SansSerif", Font.BOLD,17));
		lblMessage.setForeground(Color.decode("#00000"));

		txtStudentID= new JTextField(10);
		txtStudentID.setFont(new Font("SansSerif", Font.BOLD,14));

		txtForename= new JTextField(10);
		txtForename.setFont(new Font("SansSerif", Font.BOLD,14));

		txtSurname= new JTextField(10);
		txtSurname.setFont(new Font("SansSerif", Font.BOLD,14));

		String[] sub = {"Computing", "Math", "English", "History"};

		cmbSubject = new JComboBox(sub);
		cmbSubject.setFont(new Font("SansSerif", Font.PLAIN,16));
		cmbSubject.addActionListener(this);

		txtResult= new JTextField(10);
		txtResult.setFont(new Font("SansSerif", Font.BOLD,14));

		btnFindStudent = new JButton ("Find Student");
		btnFindStudent.setFont(new Font("SansSerif", Font.BOLD,17));
		btnFindStudent.addActionListener(this);

		btnUpdate = new JButton ("Update");
		btnUpdate.setFont(new Font("SansSerif", Font.BOLD,17));
		btnUpdate.addActionListener(this);

		btnExit = new JButton ("Exit");
		btnExit.setFont(new Font("SansSerif", Font.BOLD,17));
		btnExit.addActionListener(this);

		getContentPane().setBackground(Color.decode("#EEEEEE"));

		//disable
		txtForename.setEnabled(false);
		txtSurname.setEnabled(false);
		cmbSubject.setEnabled(false);
		txtResult.setEnabled(false);
		btnUpdate.setEnabled(false);

		addComp(lblTitle,  1, 0, 1, 1, 0, 0);
		addComp(lblStudentID,  0, 1, 1, 1, 0, 0);
		addComp(lblForename,  0, 2, 1, 1, 0, 0);
		addComp(lblSurname,  0, 3, 1, 1, 0, 0);
		addComp(lblSubject,  0, 4, 1, 1, 0, 0);
		addComp(lblResult,  0, 5, 1, 1, 0, 0);
		addComp(lblMessage,  0, 6, 1, 1, 0, 0);
		addComp(txtStudentID,  1, 1, 2, 1, 0, 0);
		addComp(txtForename,  1, 2, 2, 1, 0, 0);
		addComp(txtSurname,  1, 3, 2, 1, 0, 0);
		addComp(cmbSubject,  1, 4, 1, 1, 0, 0);
		addComp(txtResult,  1, 5, 2, 1, 0, 0);
		addComp(btnFindStudent,  0, 7, 2, 1, 0, 0);
		addComp(btnUpdate,  2, 7, 1, 1, 0, 0);
		addComp(btnExit, 3, 7, 1, 1, 0, 0);
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub

		UpdateForm u = new UpdateForm(privateMap);
		u.setTitle("Update Student");
		u.setSize(600, 500);
		u.setLocation(900, 500);
		u.setVisible(true);
		u.setDefaultCloseOperation(EXIT_ON_CLOSE);
	}

	private void addComp(Component c,
			int column, int row, int numColumns,
			int numRows, int weightx, int weighty)
	{
		GridBagConstraints gbConstraints = new GridBagConstraints();
		//set parameters

		gbConstraints.fill = GridBagConstraints.BOTH;
		gbConstraints.anchor = GridBagConstraints.CENTER;
		gbConstraints.gridx = column;
		gbConstraints.gridy = row;
		gbConstraints.gridwidth = numColumns;
		gbConstraints.gridheight = numRows;
		gbConstraints.weightx = weightx;
		gbConstraints.weighty = weighty;
		gbConstraints.insets = new Insets(5,5,5,5);

		//add to container
		cn.add(c, gbConstraints);
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub

		if(e.getSource() == btnExit)
		{
			setVisible(false);
		}

		if(e.getSource() == btnFindStudent)
		{
			String findStudentID = "";
			findStudentID = txtStudentID.getText().trim();
			foundItem = privateMap.get(findStudentID);

			if(foundItem != null)
			{
				txtStudentID.setEnabled(false);
				btnUpdate.setEnabled(true);
				txtForename.setText(foundItem.getForename());
				txtSurname.setText(foundItem.getSurname());
				cmbSubject.setSelectedItem(foundItem.getSubject());
				String r = Integer.toString(foundItem.getResult());
				txtResult.setText(r);

				txtForename.setEnabled(true);
				txtSurname.setEnabled(true);
				cmbSubject.setEnabled(true);
				txtResult.setEnabled(true);
				btnUpdate.setEnabled(true);

			}
		}

		if(e.getSource() == btnUpdate)
		{
			foundItem.setForename(txtForename.getText());
			foundItem.setSurname(txtSurname.getText());
			foundItem.setSubject(cmbSubject.getSelectedItem().toString());
			int sR = Integer.parseInt(txtResult.getText());
			foundItem.setResult(sR);
		}

	}

}