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package com.juick.components;

import com.juick.ExternalToken;
import com.juick.Message;
import com.juick.User;
import com.juick.formatters.PlainTextFormatter;
import com.juick.service.component.*;
import com.turo.pushy.apns.ApnsClient;
import com.turo.pushy.apns.ApnsClientBuilder;
import com.turo.pushy.apns.PushNotificationResponse;
import com.turo.pushy.apns.auth.ApnsSigningKey;
import com.turo.pushy.apns.util.ApnsPayloadBuilder;
import com.turo.pushy.apns.util.SimpleApnsPushNotification;
import com.turo.pushy.apns.util.concurrent.PushNotificationResponseListener;
import io.netty.util.concurrent.Future;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.inject.Inject;
import java.io.File;
import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Date;
import java.util.List;
import java.util.Optional;

public class APNSManager implements NotificationListener {
    private static Logger logger = LoggerFactory.getLogger(APNSManager.class);

    private ApnsClient apns;
    @Value("${ios_p8_key:}")
    private String p8key;
    @Value("${ios_app_id:}")
    private String topic;
    @Value("${ios_team_id:}")
    private String teamId;
    @Value("${ios_key_id:}")
    private String keyId;
    @Inject
    private NotificationsManager notificationsManager;
    @PostConstruct
    public void initialize() throws NoSuchAlgorithmException, InvalidKeyException, IOException {
        apns = new ApnsClientBuilder()
                .setApnsServer(ApnsClientBuilder.PRODUCTION_APNS_HOST)
                .setSigningKey(ApnsSigningKey.loadFromPkcs8File(new File(p8key),
                        teamId, keyId))
                .build();
    }
    @Override
    public void processMessageEvent(MessageEvent messageEvent) {
        com.juick.Message jmsg = messageEvent.getMessage();
        List<User> users = messageEvent.getUsers();
        ApnsPayloadBuilder apnsPayloadBuilder = new ApnsPayloadBuilder();
        apnsPayloadBuilder.addCustomProperty("mid", jmsg.getMid());
        apnsPayloadBuilder.addCustomProperty("uname", jmsg.getUser().getName());
        String post = PlainTextFormatter.formatPost(jmsg);
        String[] parts = post.split("\n", 2);
        apnsPayloadBuilder.setAlertTitle(parts[0]).setAlertBody(parts[1]);
        users.forEach( user -> {
            apnsPayloadBuilder.setBadgeNumber(user.getUnreadCount());
            String payload = apnsPayloadBuilder.buildWithDefaultMaximumLength();
            user.getTokens().stream().filter(t -> t.getType().equals("apns"))
                    .map(ExternalToken::getToken).forEach(token -> {
                Future<PushNotificationResponse<SimpleApnsPushNotification>> notification = apns.sendNotification(
                        new SimpleApnsPushNotification(token, topic, payload));
                notification.addListener((PushNotificationResponseListener<SimpleApnsPushNotification>) future -> {
                    if (future.isSuccess()) {
                        processAPNSResponse(token, future.getNow());
                    } else {
                        logger.warn("APNS error ", future.cause());
                    }
                });
            });
        });
    }

    @Override
    public void processSubscribeEvent(SubscribeEvent subscribeEvent) {

    }

    @Override
    public void processLikeEvent(LikeEvent likeEvent) {

    }

    @Override
    public void processPingEvent(PingEvent pingEvent) {

    }

    @Override
    public void processMessageReadEvent(MessageReadEvent messageReadEvent) {
        List<User> users = messageReadEvent.getUsers();
        ApnsPayloadBuilder apnsPayloadBuilder = new ApnsPayloadBuilder();
        users.forEach(user -> {
            apnsPayloadBuilder.setBadgeNumber(user.getUnreadCount());
            String payload = apnsPayloadBuilder.buildWithDefaultMaximumLength();
            user.getTokens().stream().filter(t -> t.getType().equals("apns"))
                    .map(ExternalToken::getToken).forEach(token -> {
                Future<PushNotificationResponse<SimpleApnsPushNotification>> notification = apns.sendNotification(
                        new SimpleApnsPushNotification(token, topic, payload));
                notification.addListener((PushNotificationResponseListener<SimpleApnsPushNotification>) future -> {
                    if (future.isSuccess()) {
                        processAPNSResponse(token, future.getNow());
                    } else {
                        logger.warn("APNS error ", future.cause());
                    }
                });
            });
        });
    }

    @Override
    public void processTopEvent(TopEvent topEvent) {
        Message message = topEvent.getMessage();
        ApnsPayloadBuilder apnsPayloadBuilder = new ApnsPayloadBuilder();
        message.getUser().getTokens().stream().filter(t -> t.getType().equals("apns"))
                .map(ExternalToken::getToken).forEach( token -> {
            String payload = apnsPayloadBuilder.setAlertTitle("Top").setAlertBody("Your message became popular!")
                    .addCustomProperty("mid", message.getMid())
                    .addCustomProperty("uname", message.getUser().getName())
                    .buildWithDefaultMaximumLength();
            Future<PushNotificationResponse<SimpleApnsPushNotification>> notification = apns.sendNotification(
                    new SimpleApnsPushNotification(token, topic, payload));
            notification.addListener((PushNotificationResponseListener<SimpleApnsPushNotification>) future -> {
                if (future.isSuccess()) {
                    processAPNSResponse(token, future.getNow());
                } else {
                    logger.warn("APNS error ", future.cause());
                }
            });
        });
    }

    @PreDestroy
    public void close() {
        apns.close();
    }

    private void processAPNSResponse(String token, PushNotificationResponse<SimpleApnsPushNotification> pushNotificationResponse) {
        if (pushNotificationResponse.isAccepted()) {
            logger.info("APNS accepted: {}", token);
        } else {
            String reason = pushNotificationResponse.getRejectionReason();
            logger.info("APNS rejected: {}", reason);
            if (reason.equals("BadDeviceToken")) {
                notificationsManager.getInvalidAPNSTokens().add(token);
            }
        }
        Optional<Date> invalidationDate = Optional.ofNullable(
                pushNotificationResponse.getTokenInvalidationTimestamp());
        invalidationDate.ifPresent(date -> {
            if (date.before(new Date())) {
                logger.info("Token invalidated: {}", token);
                notificationsManager.getInvalidAPNSTokens().add(token);
            }
        });
    }
}