package chat;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

public class ChatClient {

    private final String host;
    private final int port;
    private Socket socket;
    private PrintWriter out;
    private BufferedReader in;
    private BufferedReader consoleReader;

    public ChatClient(String host, int port) {
        this.host = host;
        this.port = port;
        this.consoleReader = new BufferedReader(new InputStreamReader(System.in));
    }

    public void start() {
        try {
            connectToServer();
            MessageListener messageListener = new MessageListener(in);
            Thread listenerThread = new Thread(messageListener);
            listenerThread.setDaemon(true);
            listenerThread.start();
            readUserInputAndSend();
        } catch (IOException e) {
            System.err.println("Client error: " + e.getMessage());
        } finally {
            cleanup();
        }
    }

    private void connectToServer() throws IOException {

        socket = new Socket(host, port);
        out = new PrintWriter(socket.getOutputStream(), true);
        in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
    }

    private void readUserInputAndSend() throws IOException {

        String line;
        while((line = consoleReader.readLine()) != null) {
            out.println(line);
        }
    }

    private void cleanup() {

        try {
            if (socket != null && !socket.isClosed()) {
                socket.close();
            }
        } catch (IOException e) {
            System.err.println("Error closing socket: " + e.getMessage());
        }
    }

    public static void main(String[] args) {
        String host = "127.0.0.1";
        int port = 12345;

        if (args.length > 0) {
            host = args[0];
        }
        if (args.length > 1) {
            try {
                port = Integer.parseInt(args[1]);
            } catch (NumberFormatException e) {
                System.err.println("Invalid port. Using default: " + port);
            }
        }

        new ChatClient(host, port).start();
    }
}