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package com.juick.api;

import com.juick.json.MessageSerializer;
import com.neovisionaries.ws.client.*;
import com.pengrad.telegrambot.BotUtils;
import com.pengrad.telegrambot.Callback;
import com.pengrad.telegrambot.TelegramBot;
import com.pengrad.telegrambot.TelegramBotAdapter;
import com.pengrad.telegrambot.model.Message;
import com.pengrad.telegrambot.request.SendMessage;
import com.pengrad.telegrambot.response.SendResponse;
import org.json.JSONObject;

import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Created by vt on 12/05/16.
 */
public class TelegramBotHook {
    private static final Logger logger = Logger.getLogger(TelegramBotHook.class.getName());

    TelegramBot bot;
    List<Long> chats = new ArrayList<>();
    WebSocket ws;
    MessageSerializer ms = new MessageSerializer();


    public TelegramBotHook(String token) {
        bot  = TelegramBotAdapter.build(token);
        bot.setWebhook("https://api.juick.com/tlgmbtwbhk");
        try {
            ws = new WebSocketFactory().createSocket("wss://ws.juick.com/_all");
            ws.addHeader("Origin", "ws.juick.com");
            ws.addHeader("Host", "ws.juick.com"); //TODO: remove from server
            ws.setPingInterval(60 * 1000);
            ws.addListener(new WebSocketAdapter() {
                @Override
                public void onDisconnected(WebSocket websocket, WebSocketFrame serverCloseFrame, WebSocketFrame clientCloseFrame, boolean closedByServer) throws Exception {
                    logger.info("ws disconnected");
                }

                @Override
                public void onConnected(WebSocket websocket, Map<String, List<String>> headers) {
                    logger.info("ws connected");
                }
                @Override
                public void onTextMessage(WebSocket websocket, String text) throws Exception {
                    super.onTextMessage(websocket, text);
                    com.juick.Message jmsg = ms.deserialize(new JSONObject(text));
                    logger.info("got jmsg: " + ms.serialize(jmsg).toString());
                    StringBuilder sb = new StringBuilder();
                    sb.append(jmsg.getUser()).append("\n").append(jmsg.getText()).append("\n");
                    if (jmsg.getAttachmentURL() != null) {
                        sb.append(jmsg.getAttachmentURL());
                    }
                    sb.append("https://juick.com/" + jmsg.getMID());
                    chats.stream().forEach(c -> {
                        bot.execute(new SendMessage(c, sb.toString()), new Callback<SendMessage, SendResponse>() {
                            @Override
                            public void onResponse(SendMessage request, SendResponse response) {
                                logger.info("got response: " + response.message().toString());
                            }

                            @Override
                            public void onFailure(SendMessage request, IOException e) {
                                logger.log(Level.WARNING, "telegram failure", e);
                            }
                        });
                    });
                }
            });
            ws.connect();
        } catch (IOException | WebSocketException e) {
            logger.log(Level.SEVERE, "couldn't create ws connection", e);
        }
    }

    public void doPost(HttpServletRequest request) throws IOException {
        try (BufferedReader reader = request.getReader()) {
            Message message = BotUtils.parseUpdate(reader).message();
            logger.info("got telegram msg: " + message.toString());
            if (!chats.contains(message.chat().id())) {
                chats.add(message.chat().id());
                logger.info("added chat with " + message.from().firstName());
                bot.execute(new SendMessage(message.chat().id(), "Subscribed!"), new Callback<SendMessage, SendResponse>() {
                    @Override
                    public void onResponse(SendMessage request, SendResponse response) {
                        logger.info("got response: " + response.message().toString());
                    }

                    @Override
                    public void onFailure(SendMessage request, IOException e) {
                        logger.log(Level.WARNING, "telegram failure", e);
                    }
                });
            }
        }
    }
}