package org.thoughtcrime.securesms.jobs;

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.WorkerThread;

import com.annimon.stream.Stream;

import org.thoughtcrime.securesms.ApplicationContext;
import org.thoughtcrime.securesms.attachments.Attachment;
import org.thoughtcrime.securesms.attachments.DatabaseAttachment;
import org.thoughtcrime.securesms.crypto.UnidentifiedAccessUtil;
import org.thoughtcrime.securesms.database.Address;
import org.thoughtcrime.securesms.database.AttachmentDatabase;
import org.thoughtcrime.securesms.database.DatabaseFactory;
import org.thoughtcrime.securesms.database.MmsDatabase;
import org.thoughtcrime.securesms.database.NoSuchMessageException;
import org.thoughtcrime.securesms.database.RecipientDatabase.UnidentifiedAccessMode;
import org.thoughtcrime.securesms.dependencies.InjectableType;
import org.thoughtcrime.securesms.jobmanager.ChainParameters;
import org.thoughtcrime.securesms.jobmanager.JobManager;
import org.thoughtcrime.securesms.jobmanager.SafeData;
import org.thoughtcrime.securesms.linkpreview.LinkPreview;
import org.thoughtcrime.securesms.logging.Log;
import org.thoughtcrime.securesms.mms.MmsException;
import org.thoughtcrime.securesms.mms.OutgoingMediaMessage;
import org.thoughtcrime.securesms.recipients.Recipient;
import org.thoughtcrime.securesms.service.ExpiringMessageManager;
import org.thoughtcrime.securesms.transport.InsecureFallbackApprovalException;
import org.thoughtcrime.securesms.transport.RetryLaterException;
import org.thoughtcrime.securesms.transport.UndeliverableMessageException;
import org.thoughtcrime.securesms.util.TextSecurePreferences;
import org.whispersystems.libsignal.util.guava.Optional;
import org.whispersystems.signalservice.api.SignalServiceMessageSender;
import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
import org.whispersystems.signalservice.api.messages.SignalServiceAttachment;
import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage.Preview;
import org.whispersystems.signalservice.api.messages.shared.SharedContact;
import org.whispersystems.signalservice.api.push.SignalServiceAddress;
import org.whispersystems.signalservice.api.push.exceptions.UnregisteredUserException;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;

import javax.inject.Inject;

import androidx.work.Data;
import androidx.work.WorkerParameters;

public class PushMediaSendJob extends PushSendJob implements InjectableType {

  private static final long serialVersionUID = 1L;

  private static final String TAG = PushMediaSendJob.class.getSimpleName();

  private static final String KEY_MESSAGE_ID = "message_id";

  @Inject transient SignalServiceMessageSender messageSender;

  private long messageId;

  public PushMediaSendJob(@NonNull Context context, @NonNull WorkerParameters workerParameters) {
    super(context, workerParameters);
  }

  public PushMediaSendJob(Context context, long messageId, Address destination) {
    super(context, constructParameters(destination));
    this.messageId = messageId;
  }

  @WorkerThread
  public static void enqueue(@NonNull Context context, @NonNull JobManager jobManager, long messageId, @NonNull Address destination) {
    try {
      MmsDatabase          database    = DatabaseFactory.getMmsDatabase(context);
      OutgoingMediaMessage message     = database.getOutgoingMessage(messageId);
      List<Attachment>     attachments = new LinkedList<>();

      attachments.addAll(message.getAttachments());
      attachments.addAll(Stream.of(message.getLinkPreviews()).filter(p -> p.getThumbnail().isPresent()).map(p -> p.getThumbnail().get()).toList());
      attachments.addAll(Stream.of(message.getSharedContacts()).filter(c -> c.getAvatar() != null).map(c -> c.getAvatar().getAttachment()).withoutNulls().toList());

      List<AttachmentUploadJob> attachmentJobs = Stream.of(attachments).map(a -> new AttachmentUploadJob(context, ((DatabaseAttachment) a).getAttachmentId())).toList();
      ChainParameters           chainParams    = new ChainParameters.Builder().setGroupId(destination.serialize()).build();

      if (attachmentJobs.isEmpty()) {
        jobManager.add(new PushMediaSendJob(context, messageId, destination));
      } else {
        jobManager.startChain(attachmentJobs)
                  .then(new PushMediaSendJob(context, messageId, destination))
                  .enqueue(chainParams);
      }

    } catch (NoSuchMessageException | MmsException e) {
      Log.w(TAG, "Failed to enqueue message.", e);
      DatabaseFactory.getMmsDatabase(context).markAsSentFailed(messageId);
      notifyMediaMessageDeliveryFailed(context, messageId);
    }
  }

  @Override
  protected void initialize(@NonNull SafeData data) {
    messageId = data.getLong(KEY_MESSAGE_ID);
  }

  @Override
  protected @NonNull Data serialize(@NonNull Data.Builder dataBuilder) {
    return dataBuilder.putLong(KEY_MESSAGE_ID, messageId).build();
  }

  @Override
  protected void onAdded() {
    DatabaseFactory.getMmsDatabase(context).markAsSending(messageId);
  }

  @Override
  public void onPushSend()
      throws RetryLaterException, MmsException, NoSuchMessageException,
             UndeliverableMessageException
  {
    ExpiringMessageManager expirationManager = ApplicationContext.getInstance(context).getExpiringMessageManager();
    MmsDatabase            database          = DatabaseFactory.getMmsDatabase(context);
    OutgoingMediaMessage   message           = database.getOutgoingMessage(messageId);

    if (database.isSent(messageId)) {
      warn(TAG, "Message " + messageId + " was already sent. Ignoring.");
      return;
    }

    try {
      log(TAG, "Sending message: " + messageId);
      
      Recipient              recipient  = message.getRecipient().resolve();
      byte[]                 profileKey = recipient.getProfileKey();
      UnidentifiedAccessMode accessMode = recipient.getUnidentifiedAccessMode();

      boolean unidentified = deliver(message);

      database.markAsSent(messageId, true);
      markAttachmentsUploaded(messageId, message.getAttachments());
      database.markUnidentified(messageId, unidentified);

      if (TextSecurePreferences.isUnidentifiedDeliveryEnabled(context)) {
        if (unidentified && accessMode == UnidentifiedAccessMode.UNKNOWN && profileKey == null) {
          log(TAG, "Marking recipient as UD-unrestricted following a UD send.");
          DatabaseFactory.getRecipientDatabase(context).setUnidentifiedAccessMode(recipient, UnidentifiedAccessMode.UNRESTRICTED);
        } else if (unidentified && accessMode == UnidentifiedAccessMode.UNKNOWN) {
          log(TAG, "Marking recipient as UD-enabled following a UD send.");
          DatabaseFactory.getRecipientDatabase(context).setUnidentifiedAccessMode(recipient, UnidentifiedAccessMode.ENABLED);
        } else if (!unidentified && accessMode != UnidentifiedAccessMode.DISABLED) {
          log(TAG, "Marking recipient as UD-disabled following a non-UD send.");
          DatabaseFactory.getRecipientDatabase(context).setUnidentifiedAccessMode(recipient, UnidentifiedAccessMode.DISABLED);
        }
      }

      if (message.getExpiresIn() > 0 && !message.isExpirationUpdate()) {
        database.markExpireStarted(messageId);
        expirationManager.scheduleDeletion(messageId, true, message.getExpiresIn());
      }

      log(TAG, "Sent message: " + messageId);

    } catch (InsecureFallbackApprovalException ifae) {
      warn(TAG, "Failure", ifae);
      database.markAsPendingInsecureSmsFallback(messageId);
      notifyMediaMessageDeliveryFailed(context, messageId);
      ApplicationContext.getInstance(context).getJobManager().add(new DirectoryRefreshJob(context, false));
    } catch (UntrustedIdentityException uie) {
      warn(TAG, "Failure", uie);
      database.addMismatchedIdentity(messageId, Address.fromSerialized(uie.getE164Number()), uie.getIdentityKey());
      database.markAsSentFailed(messageId);
    }
  }

  @Override
  public boolean onShouldRetry(Exception exception) {
    if (exception instanceof RetryLaterException) return true;
    return false;
  }

  @Override
  public void onCanceled() {
    DatabaseFactory.getMmsDatabase(context).markAsSentFailed(messageId);
    notifyMediaMessageDeliveryFailed(context, messageId);
  }

  private boolean deliver(OutgoingMediaMessage message)
      throws RetryLaterException, InsecureFallbackApprovalException, UntrustedIdentityException,
             UndeliverableMessageException
  {
    if (message.getRecipient() == null) {
      throw new UndeliverableMessageException("No destination address.");
    }

    try {
      rotateSenderCertificateIfNecessary();

      SignalServiceAddress                     address            = getPushAddress(message.getRecipient().getAddress());
      List<SignalServiceAttachment>            serviceAttachments = getAttachmentPointersFor(message.getAttachments());
      Optional<byte[]>                         profileKey         = getProfileKey(message.getRecipient());
      Optional<SignalServiceDataMessage.Quote> quote              = getQuoteFor(message);
      List<SharedContact>                      sharedContacts     = getSharedContactsFor(message);
      List<Preview>                            previews           = getPreviewsFor(message);
      SignalServiceDataMessage                 mediaMessage       = SignalServiceDataMessage.newBuilder()
                                                                                            .withBody(message.getBody())
                                                                                            .withAttachments(serviceAttachments)
                                                                                            .withTimestamp(message.getSentTimeMillis())
                                                                                            .withExpiration((int)(message.getExpiresIn() / 1000))
                                                                                            .withProfileKey(profileKey.orNull())
                                                                                            .withQuote(quote.orNull())
                                                                                            .withSharedContacts(sharedContacts)
                                                                                            .withPreviews(previews)
                                                                                            .asExpirationUpdate(message.isExpirationUpdate())
                                                                                            .build();

      return messageSender.sendMessage(address, UnidentifiedAccessUtil.getAccessFor(context, message.getRecipient()), mediaMessage).getSuccess().isUnidentified();
    } catch (UnregisteredUserException e) {
      warn(TAG, e);
      throw new InsecureFallbackApprovalException(e);
    } catch (FileNotFoundException e) {
      warn(TAG, e);
      throw new UndeliverableMessageException(e);
    } catch (IOException e) {
      warn(TAG, e);
      throw new RetryLaterException(e);
    }
  }
}