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package mpogassignment01;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Graphics2D;
import java.awt.Image;
import java.net.ServerSocket;
import java.net.InetAddress;
import java.io.InterruptedIOException;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.ArrayList;
import static java.awt.event.KeyEvent.*;
import javax.swing.JOptionPane;

/**
 *
 * @author jiahui
 */
public class Assignment01 extends GameEngine {

    final static int PORT = 3000;

    enum State {

        MENU, CONNECTING, WAITING, CHATTING
    };
    State state;
    Socket sock;
    ServerSocket servSock;
    //String text;
    BufferedReader socketIn;
    PrintWriter socketOut;
    Graphics2D g2d;
    ArrayList<String> messages = new ArrayList<String>();

    private Image mainMenuImage;

    boolean checkChoice = false;

    String userName = " ";

    int checkNo = 0;

    int Health = 100;
    int Exp = 50;

//    try {
//            mainMenuImage = Image.createImage("/Main.png");
//        } catch (IOException ioe) {
//            System.err.println("Failed to load Main Menu Image!");
//        } // Load Main Menu Image

    void displayMessage(String s) {
        if (messages.size() > 10) // if array is too full:
        {
            messages.remove(0);
        }
        messages.add(s);
    }

    void reset()
    {
        checkNo = 0;
    }

    String userInput = " ";
    boolean processUserInput() {
       char c =getLastKey();
        if (c=='\0')
            return false;
        if ((int)c==VK_ENTER)
            return true; // end of entry
        if((int)c==VK_BACK_SPACE || (int)c==VK_DELETE)
        {
            if(!userInput.isEmpty())
            {
                userInput=userInput.substring(0, userInput.length()-1);
            }
            return false; // not yet
        }
        userInput+=c;
        return false;
    }



    public static void main(String[] args) {
        new Assignment01().go(1000, 700, false);
    }

    public void startup() {
        state = State.MENU;
        String input = JOptionPane.showInputDialog("Please Enter a Nickname!", "New Player");
        userName = input;
    }

    public void update() {
        if (keys[VK_ESCAPE]) {
            close(); // close me
        }

        if (state == State.MENU) {
            updateMenu();
        } else if (state == State.WAITING) {
            updateWaiting();
        } else if (state == State.CONNECTING) {
            updateConnecting();
        } else {
            updateChatting();

        }

    }

    void updateMenu() {
        if (keys[VK_C]) {
            state = State.CONNECTING;
            getLastKey();
            userInput="localhost";
            //userInput="172.17.66.58"; // jiahui
            //userInput="172.17.73.253"; //brenda
        }
        if (keys[VK_S]) {
            state = State.WAITING;
            setupServer();
        }
    }

    void updateWaiting() {
        try {
            sock = servSock.accept();
            sock.setSoTimeout(1);
            displayMessage("We have a connection from " + sock.getLocalAddress().getHostAddress() + ":" + sock.getPort());
            socketIn = new BufferedReader(new InputStreamReader(sock.getInputStream()));
            socketOut = new PrintWriter(new OutputStreamWriter(sock.getOutputStream()));
            // we have a connection, to change state to Chatting
            state = State.CHATTING;
            getLastKey(); // will clear the last keypress
        } catch (InterruptedIOException e) {
        } catch (IOException e) {
            displayMessage("Error:" + e);
        }
    }

    void updateConnecting() {
        if (processUserInput()) { //if user pressed return
            //connect to this FP:
            try {
                sock = new Socket(userInput, PORT);
                sock.setSoTimeout(1);
                //TODO: set up socketIn,socketOut
                socketIn = new BufferedReader(new InputStreamReader(sock.getInputStream()));
                socketOut = new PrintWriter(new OutputStreamWriter(sock.getOutputStream()));
                displayMessage("connected");
                // we have a connection, to change state to Chatting
                state = State.CHATTING;
                userInput = "";
            } catch (Exception e) {
                displayMessage("Error:" + e);
            }

        }
    }

    String recvSocket() {
        //receive the message
        try {
            String s = socketIn.readLine();
            return s;
        } catch (InterruptedIOException e) {
        } catch (IOException e) {
            displayMessage("Error: " + e);
            e.printStackTrace();
        }
        return null;
    }

    void sendSocket(String s) {
            socketOut.println(s);
            socketOut.flush();
    }


    void updateChatting() {
        String s = recvSocket();
        if (s!=null){
            System.out.println(s);
            if(s.startsWith("CHAT ")){
                s=s.substring(5); // chop off "CHAT"
                displayMessage("I got a message:" + s);
            }
            if (s.startsWith("GAME ")){
                s=s.substring(5); // chop off "CHAT"
                //TODO: do something useful with the game
                displayMessage("PLAYER " + s);
            }
        }

        if (keys[VK_LEFT] && checkNo==0){
            sendSocket("GAME ATTACK");
            //checkChoice = true;
            Exp = Exp - 10;
            checkNo++;
        }
        //attack
        if (keys[VK_RIGHT]  && checkNo==0){
            sendSocket("GAME DEFEND");
            //checkChoice = true;
            Exp = Exp - 5;
            checkNo++;
        }
        //idle
        if(keys[VK_UP]  && checkNo==0){
            sendSocket("GAME IDLE");
            //checkChoice = true;
            checkNo++;
            if (Exp == 50)
                Exp = 50;
            else
                Exp = Exp + 10;
        }

        if (processUserInput()) { // if  user pressed return
            if (userInput.isEmpty() == false) { // if data was entered
                displayMessage("Sending:" + userInput);
                socketOut.println("CHAT " + userInput);
                socketOut.flush();
                userInput = ""; // clear user input
            }
        }
    }

    public void setupServer() {
        try {
            servSock = new ServerSocket(3000);
            servSock.setSoTimeout(1);
            InetAddress local = InetAddress.getLocalHost();

            displayMessage("starting....");
        } catch (InterruptedIOException e) {
        } catch (IOException er) {
            displayMessage("Error Found: " + er);
        }
    }

    public void draw(Graphics2D g2d) {
        if (keys[VK_ESCAPE]) {
            close(); // close me
        }
        if (state == State.MENU) {
            drawMenu(g2d);
        } else if (state == State.WAITING) {
            drawWaiting(g2d);
        } else if (state == State.CONNECTING) {
            drawConnecting(g2d);
        } else {
            drawChatting(g2d);
        }
    }

    void drawMenu(Graphics2D g2d) {
        clear(g2d, Color.WHITE);
        g2d.setColor(Color.BLACK);
        g2d.drawString("Press 'C' for Client, 'S' for Server", 10, 50);
    }

    void drawWaiting(Graphics2D g2d) {
        clear(g2d, Color.YELLOW);
        g2d.setColor(Color.RED);
        g2d.drawString("Waiting for connection", 10, 50);
        for (int i = 0; i < messages.size(); i++) {
            g2d.drawString(messages.get(i), 10, 60 + 10 * i);
        }
    }

    void drawConnecting(Graphics2D g2d) {
        clear(g2d, Color.LIGHT_GRAY);
        g2d.setColor(Color.BLACK);
        g2d.drawString("Please enter server name", 10, 50);
        g2d.drawString(">" + userInput + ",", 10, 70);

    }

    void drawChatting(Graphics2D g2d) {
        clear(g2d, Color.CYAN);
        g2d.setColor(Color.BLACK);
        g2d.drawString(userName + " are connected", 40,530);
        g2d.drawString("my health: " + Health, 40,50);
        g2d.drawString("my exp: " + Exp, 240,50);

        for (int i = 0; i < messages.size(); i++) {
            g2d.drawString(messages.get(i), 40, 550 + 10 * i);
            g2d.drawString(userName+" > " + userInput + "|", 40, 670);
        }
    }
}