import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
import javax.swing.JButton;
import javax.swing.JTextField;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Font;
import java.util.Scanner;
import javax.swing.JLabel;
import javax.swing.JComboBox;


public class C4GUI extends JFrame {

    /**
     *
     */
    private JPanel contentPane;
    private JTextField input;
    private JTextArea output;
    private ConnectFour game;
    private char[][] board;
    private JPanel panel_1;
    private JLabel lblNewLabel;
        private JButton newGame;
    private JComboBox playerOne;
    private JLabel lblNewLabel_1;
    private JComboBox playerTwo;

        private String[] players;
        private Player currentPlayer;
    private Player firstPlayer;
    private Player secondPlayer;


    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    C4GUI frame = new C4GUI();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public C4GUI() {
        setTitle("Connect Four");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 500, 370);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        contentPane.setLayout(new BorderLayout(0, 0));
        setContentPane(contentPane);

        output = new JTextArea();
        output.setFont(new Font("Monospaced", Font.BOLD, 18));
        output.setEditable(false);
        contentPane.add(output, BorderLayout.CENTER);

        JPanel panel = new JPanel();
        contentPane.add(panel, BorderLayout.SOUTH);

        newGame = new JButton("New Game");
        newGame.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                newGameButtonClicked();
            }
        });
        panel.add(newGame);

        input = new JTextField();
        input.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                inputEntered();
            }
        });
        panel.add(input);
        input.setColumns(20);

        panel_1 = new JPanel();
        contentPane.add(panel_1, BorderLayout.NORTH);

        lblNewLabel = new JLabel("Player X:");
        panel_1.add(lblNewLabel);

                players = new String[] {"Human", "Dumb Robot", "Good Robot"};

        playerOne = new JComboBox(players);
        panel_1.add(playerOne);

        lblNewLabel_1 = new JLabel("Player O:");
        panel_1.add(lblNewLabel_1);

        playerTwo = new JComboBox(players);
        panel_1.add(playerTwo);


    }
        /**
         * Manages entered input
         */
    protected void inputEntered() {
        String line = input.getText();
        input.setText("");

                //if (currentPlayer instanceof HumanPlayer) {
        Scanner sc = new Scanner(line);
                if (!sc.hasNextInt()) {
                    //Invalid input
                    JOptionPane.showMessageDialog(this, "Invalid input! Please try again.");
                    return;
                }
                //} else {

                //}
        int col = sc.nextInt();
                board = new char[ConnectFour.ROWS][ConnectFour.COLS];

        //board = new char[ConnectFour.ROWS][ConnectFour.COLS];

//      for(int j = 0; j <= ConnectFour.COLS; j++){
//          for(int n = 0; n < ConnectFour.ROWS; n++){
//              if(board[j][n] == 0){
//                  game.setMove(game.getTurn(), col);
//                  game.isGameOver();
//                  game.getTurn();
//                  output.setText(game.toString());
//              }
//          }
//      }


//                if ((result == false) || (game.findEmptySpace(col) < -1)) { // if (!result)
//                    JOptionPane.showMessageDialog(this, "Invalid input! Please try again.");
//                    return;
//                }
        output.setText(game.toString());


    }
        /**
         * Begins new game
         */
    protected void newGameButtonClicked() {
        //      System.out.println("New Game Button clicked!");
        game = new ConnectFour();
        output.setText(game.toString());
                assignPlayers();
                currentPlayer = firstPlayer;
                //System.out.println(currentPlayer == null);
                makeMoves();
//                while (currentPlayer instanceof HumanPlayer) {
//                    inputEntered();
//                }
//                newGame.setEnabled(false);
        }

        /**
         * Assigns players based on JComboBox values
         */
        protected void assignPlayers() {
            if (playerOne.getSelectedItem() == players[0]){
            firstPlayer = new HumanPlayer();
        }

        else if (playerOne.getSelectedItem() == players[1]){
            firstPlayer = new DumbRobot();
        }

        else if (playerOne.getSelectedItem() == players[2]){
            firstPlayer = new GoodRobot();
        }

        if (playerTwo.getSelectedItem() == players[0]){
            secondPlayer = new HumanPlayer();
        }

        else if (playerTwo.getSelectedItem() == players[1]){
            secondPlayer = new DumbRobot();
        }

        else if (playerTwo.getSelectedItem() == players[2]){
            secondPlayer = new GoodRobot();
        }
        }

        protected void makeMoves() {

            while(game.getWinner() == ConnectFour.EMPTY) {
                //output.setText(game.toString());
                int move = 1;
                if (currentPlayer instanceof HumanPlayer) {
                    move = 3;
                } else {
                    move = currentPlayer.makeMove(ConnectFour.COLS, game.getTurn(), board);
                }
                game.setMove(game.getTurn(), move);
                if (game.getTurn() == ConnectFour.PLAYER_X) {
                    currentPlayer = secondPlayer;
                } else {
                    currentPlayer = firstPlayer;
                }
            }
        }


}