/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 * Copyright (c) 2013, MPL CodeInside http://codeinside.ru
 */

package ru.codeinside.gses.beans;

import org.activiti.engine.delegate.DelegateExecution;
import org.activiti.engine.impl.cmd.CreateAttachmentCmd;
import org.activiti.engine.impl.context.Context;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.task.Attachment;
import org.apache.commons.lang.StringUtils;
import org.apache.tika.mime.MimeTypes;
import ru.codeinside.gses.activiti.Activiti;
import ru.codeinside.gses.activiti.ftarchive.AttachmentFFT;
import ru.codeinside.gses.activiti.history.ExecutionId;
import ru.codeinside.gses.activiti.history.HistoricDbSqlSession;
import ru.codeinside.gws.api.Enclosure;
import ru.codeinside.gws.api.ExchangeContext;
import ru.codeinside.gws.api.Signature;

import java.io.ByteArrayInputStream;
import java.security.cert.CertificateEncodingException;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;

//TODO переместить в другой пакет
public class ActivitiExchangeContext implements ExchangeContext {

  final protected Logger logger = Logger.getLogger(getClass().getName());

  private final MimeTypes mimeTypes = new MimeTypes();
  private final DelegateExecution execution;
  private Object local;

  public ActivitiExchangeContext(DelegateExecution execution) {
    this.execution = execution;
  }

  @Override
  public void setVariable(String name, Object value) {
    logger.fine("Set  " + name + " = '" + value + "'");
    execution.setVariable(name, value);
  }

  @Override
  public Set<String> getVariableNames() {
    return execution.getVariableNames();
  }

  @Override
  public Object getVariable(String name) {
    final Object value = execution.getVariable(name);
    logger.fine("Get  " + name + " = '" + value + "'");
    return value;
  }

  @Override
  public Object getLocal() {
    return local;
  }

  @Override
  public void setLocal(Object value) {
    local = value;
  }

  @Override
  public boolean isEnclosure(String name) {
    final Object value = execution.getVariable(name);
    return AttachmentFFT.isAttachmentValue(value);
  }

  @Override
  public Enclosure getEnclosure(String name) {
    final Object value = execution.getVariable(name);
    String attId = AttachmentFFT.getAttachmentIdByValue(value);
    if (StringUtils.isEmpty(attId)) {
      return null;
    }
    return Activiti.createEnclosureInCommandContext(attId, execution.getId(), name);
  }

  //TODO переделать Cmd на сервисы
  @Override
  public void addEnclosure(String name, Enclosure enclosure) {
    ByteArrayInputStream content = new ByteArrayInputStream(enclosure.content);
    String mimeType = StringUtils.isNotEmpty(enclosure.mimeType) ? enclosure.mimeType : mimeTypes.getMimeType(enclosure.content).getName();
    Attachment attachment = new CreateAttachmentCmd(mimeType, execution.getId(), execution.getProcessInstanceId(), enclosure.fileName, name, content, null).execute(Context.getCommandContext());
    setVariable(name, AttachmentFFT.stringValue(attachment));

    final Signature signature = enclosure.signature;
    if (signature != null && signature.certificate != null && signature.sign != null && signature.valid) {
      try {
        final byte[] certificate = signature.certificate.getEncoded();
        final byte[] sign = signature.sign;
        final CommandContext ctx = Context.getCommandContext();
        final HistoricDbSqlSession session = (HistoricDbSqlSession) ctx.getDbSqlSession();
        // TODO: является ли execution.getId()==taskId ?
        final ExecutionId executionId = new ExecutionId(execution.getProcessInstanceId(), execution.getId(), execution.getId());
        session.addSignature(executionId, name, certificate, sign, true);
      } catch (CertificateEncodingException e) {
        logger.log(Level.WARNING, "encode certificate fail", e);
      }
    }
  }
}