package org.telegram.updateshandlers;

import org.telegram.*;
import org.telegram.api.*;
import org.telegram.database.DatabaseManager;
import org.telegram.methods.SendMessage;
import org.telegram.services.DirectionsService;
import org.telegram.services.LocalisationService;
import org.telegram.updatesreceivers.UpdatesThread;
import org.telegram.updatesreceivers.Webhook;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentLinkedQueue;

/**
 * @author Ruben Bermudez
 * @version 1.0
 * @brief Handler for updates to Directions Bot
 * @date 24 of June of 2015
 */
public class DirectionsHandlers implements UpdatesCallback {
    private static final String TOKEN = BotConfig.TOKENDIRECTIONS;
    private static final String webhookPath = "directionsBot";
    private final Webhook webhook;
    private final UpdatesThread updatesThread;
    private static final int WATING_ORIGIN_STATUS = 0;
    private static final int WATING_DESTINY_STATUS = 1;
    private final ConcurrentLinkedQueue<Integer> languageMessages = new ConcurrentLinkedQueue<>();

    public DirectionsHandlers() {
        if (BuildVars.useWebHook) {
            webhook = new Webhook(this, webhookPath);
            updatesThread = null;
            SenderHelper.SendWebhook(webhook.getURL(), TOKEN);
        } else {
            webhook = null;
            SenderHelper.SendWebhook("", TOKEN);
            updatesThread = new UpdatesThread(TOKEN, this);
        }
    }

    @Override
    public void onUpdateReceived(Update update) {
        handleDirections(update);
    }

    public void handleDirections(Update update) {
        Message message = update.getMessage();
        if (message != null && message.hasText()) {
            if (languageMessages.contains(message.getFrom().getId())) {
                onLanguageSelected(message);
            } else {
                String language = DatabaseManager.getInstance().getUserLanguage(update.getMessage().getFrom().getId());
                if (message.getText().startsWith(Commands.setLanguageCommand)) {
                    onSetLanguageCommand(message, language);
                } else if (message.getText().startsWith(Commands.startDirectionCommand)) {
                    onStartdirectionsCommand(message, language);
                } else if ((message.getText().startsWith(Commands.help) ||
                        (message.getText().startsWith(Commands.startCommand) || !message.isGroupMessage())) &&
                        DatabaseManager.getInstance().getUserDestinationStatus(message.getFrom().getId()) == -1) {
                    sendHelpMessage(message, language);
                } else if (!message.getText().startsWith("/")) {
                    if (DatabaseManager.getInstance().getUserDestinationStatus(message.getFrom().getId()) == WATING_ORIGIN_STATUS &&
                            message.hasReplayMessage() &&
                            DatabaseManager.getInstance().getUserDestinationMessageId(message.getFrom().getId()) == message.getReplyToMessage().getMessageId()) {
                        onOriginReceived(message, language);

                    } else if (DatabaseManager.getInstance().getUserDestinationStatus(message.getFrom().getId()) == WATING_DESTINY_STATUS &&
                            message.hasReplayMessage() &&
                            DatabaseManager.getInstance().getUserDestinationMessageId(message.getFrom().getId()) == message.getReplyToMessage().getMessageId()) {
                        onDestinationReceived(message, language);
                    } else if (!message.hasReplayMessage()) {
                        if (DatabaseManager.getInstance().getUserDestinationStatus(message.getFrom().getId()) == -1) {
                            sendHelpMessage(message, language);
                        } else {
                            SendMessage sendMessageRequest = new SendMessage();
                            sendMessageRequest.setText(LocalisationService.getInstance().getString("youNeedReplyDirections", language));
                            sendMessageRequest.setChatId(message.getChatId());
                            SenderHelper.SendMessage(sendMessageRequest, TOKEN);
                        }
                    }
                }
            }
        }
    }

    private void onDestinationReceived(Message message, String language) {
        String origin = DatabaseManager.getInstance().getUserOrigin(message.getFrom().getId());
        String destiny = message.getText();
        List<String> directions = DirectionsService.getInstance().getDirections(origin, destiny, language);
        SendMessage sendMessageRequest = new SendMessage();
        sendMessageRequest.setChatId(message.getChatId());
        ReplyKeyboardHide replyKeyboardHide = new ReplyKeyboardHide();
        replyKeyboardHide.setSelective(true);
        sendMessageRequest.setReplayMarkup(replyKeyboardHide);
        sendMessageRequest.setReplayToMessageId(message.getMessageId());
        Message sentMessage = null;
        for (String direction : directions) {
            sendMessageRequest.setText(direction);
            sentMessage = SenderHelper.SendMessage(sendMessageRequest, TOKEN);
        }
        if (sentMessage != null) {
            DatabaseManager.getInstance().deleteUserForDirections(message.getFrom().getId());
        }
    }

    private void onOriginReceived(Message message, String language) {
        SendMessage sendMessageRequest = new SendMessage();
        sendMessageRequest.setChatId(message.getChatId());
        sendMessageRequest.setReplayToMessageId(message.getMessageId());
        ForceReply forceReply = new ForceReply();
        forceReply.setSelective(true);
        sendMessageRequest.setReplayMarkup(forceReply);
        sendMessageRequest.setText(LocalisationService.getInstance().getString("sendDestination", language));
        Message sentMessage = SenderHelper.SendMessage(sendMessageRequest, TOKEN);
        if (sentMessage != null) {
            DatabaseManager.getInstance().addUserForDirection(message.getFrom().getId(), WATING_DESTINY_STATUS,
                    sentMessage.getMessageId(), message.getText());
        }
    }

    private void sendHelpMessage(Message message, String language) {
        SendMessage sendMessageRequest = new SendMessage();
        String helpDirectionsFormated = String.format(
                LocalisationService.getInstance().getString("helpDirections", language),
                Commands.startDirectionCommand);
        sendMessageRequest.setText(helpDirectionsFormated);
        sendMessageRequest.setChatId(message.getChatId());
        SenderHelper.SendMessage(sendMessageRequest, TOKEN);
    }

    private void onStartdirectionsCommand(Message message, String language) {
        SendMessage sendMessageRequest = new SendMessage();
        sendMessageRequest.setChatId(message.getChatId());
        sendMessageRequest.setReplayToMessageId(message.getMessageId());
        ForceReply forceReply = new ForceReply();
        forceReply.setSelective(true);
        sendMessageRequest.setReplayMarkup(forceReply);
        sendMessageRequest.setText(LocalisationService.getInstance().getString("initDirections", language));
        Message sentMessage = SenderHelper.SendMessage(sendMessageRequest, TOKEN);
        if (sentMessage != null) {
            DatabaseManager.getInstance().addUserForDirection(message.getFrom().getId(), WATING_ORIGIN_STATUS,
                    sentMessage.getMessageId(), null);
        }
    }

    private void onSetLanguageCommand(Message message, String language) {
        SendMessage sendMessageRequest = new SendMessage();
        sendMessageRequest.setChatId(message.getChatId());
        ReplyKeyboardMarkup replyKeyboardMarkup = new ReplyKeyboardMarkup();
        HashMap<String, String> languages = LocalisationService.getInstance().supportedLanguages;
        List<List<String>> commands = new ArrayList<>();
        for (Map.Entry<String, String> entry : languages.entrySet()) {
            List<String> commandRow = new ArrayList<>();
            commandRow.add(entry.getKey() + " --> " + entry.getValue());
            commands.add(commandRow);
        }
        replyKeyboardMarkup.setResizeKeyboard(true);
        replyKeyboardMarkup.setOneTimeKeyboad(true);
        replyKeyboardMarkup.setKeyboard(commands);
        replyKeyboardMarkup.setSelective(true);
        sendMessageRequest.setReplayMarkup(replyKeyboardMarkup);
        sendMessageRequest.setText(LocalisationService.getInstance().getString("chooselanguage", language));
        SenderHelper.SendMessage(sendMessageRequest, TOKEN);
        languageMessages.add(message.getFrom().getId());
    }

    private void onLanguageSelected(Message message) {
        String[] parts = message.getText().split("-->", 2);
        SendMessage sendMessageRequest = new SendMessage();
        sendMessageRequest.setChatId(message.getChatId());
        if (LocalisationService.getInstance().supportedLanguages.containsKey(parts[0].trim())) {
            DatabaseManager.getInstance().putUserLanguage(message.getFrom().getId(), parts[0].trim());
            sendMessageRequest.setText(LocalisationService.getInstance().getString("languageModified", parts[0].trim()));
        } else {
            sendMessageRequest.setText(LocalisationService.getInstance().getString("errorLanguage"));
        }
        sendMessageRequest.setReplayToMessageId(message.getMessageId());
        ReplyKeyboardHide replyKeyboardHide = new ReplyKeyboardHide();
        replyKeyboardHide.setHideKeyboard(true);
        replyKeyboardHide.setSelective(true);
        sendMessageRequest.setReplayMarkup(replyKeyboardHide);
        SenderHelper.SendMessage(sendMessageRequest, TOKEN);
        languageMessages.remove(message.getFrom().getId());
    }
}