/**
 * Copyright 2017 ZTE Corporation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.onap.workflow.wrapper;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import javax.ws.rs.core.Response;

import org.glassfish.jersey.media.multipart.FormDataContentDisposition;
import org.onap.workflow.common.EnumStatus;
import org.onap.workflow.common.RestResponse;
import org.onap.workflow.entity.DeployBpmnFileResponse;
import org.onap.workflow.entity.StartProcessRequest;
import org.onap.workflow.externalservice.entity.activitientitiy.ActivitiDeployResponse;
import org.onap.workflow.externalservice.entity.activitientitiy.ActivitiStartProcessRequest;
import org.onap.workflow.externalservice.entity.activitientitiy.ActivitiStartProcessRequestParam;
import org.onap.workflow.externalservice.service.activitiservice.ActivitiServiceConsumer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class WorkflowInstanceWrapper {
  private static final Logger logger = LoggerFactory.getLogger(WorkflowInstanceWrapper.class);

  private static WorkflowInstanceWrapper wrapper = new WorkflowInstanceWrapper();

  public static WorkflowInstanceWrapper getInstance() {
    return wrapper;
  }

  public Response deployBpmnFile(String filename, InputStream fileInputStream,
      FormDataContentDisposition fileDetail) {
    try {
      ActivitiDeployResponse deployresult =
          ActivitiServiceConsumer.deploybpmnfile(fileInputStream, filename);
      if (deployresult != null) {
        DeployBpmnFileResponse result = new DeployBpmnFileResponse();
        result.setStatus(EnumStatus.SUCCESS.ordinal());
        result.setMessage(EnumStatus.SUCCESS.toString());
        result.setDeployedId(deployresult.getId());
        result.setProcessId(filename);
        return Response.ok(result).build();
      }
    } catch (Exception e) {
      logger.error("deployBpmnFile fail.", e);
    }
    return Response.serverError().build();
  }

  public RestResponse undeployBpmnFile(String deployId) {
    return ActivitiServiceConsumer.undeploybpmnfile(deployId);
  }

  public Response startProcess(StartProcessRequest request) {
    try {
      ActivitiStartProcessRequest bpmnrequest = new ActivitiStartProcessRequest();
      bpmnrequest.setProcessDefinitionKey(request.getProcessDefinitionKey());
      if (request.getParams() != null) {
        List<ActivitiStartProcessRequestParam> paramlist = convertProcessRequest(request);
        bpmnrequest.setVariables(paramlist.toArray(new ActivitiStartProcessRequestParam[0]));
      }
      RestResponse result = ActivitiServiceConsumer.startBpmnProcess(bpmnrequest);
      return Response.ok(result.getResult()).build();
    } catch (Exception e) {
      logger.error("startProcess fail.", e);
    }
    return Response.serverError().build();
  }

  private List<ActivitiStartProcessRequestParam> convertProcessRequest(
      StartProcessRequest request) {
    List<ActivitiStartProcessRequestParam> paramlist =
        new ArrayList<ActivitiStartProcessRequestParam>();
    while (request.getParams().keySet().iterator().hasNext()) {
      String key = request.getParams().keySet().iterator().next();
      ActivitiStartProcessRequestParam param = new ActivitiStartProcessRequestParam();
      param.setName(key);
      param.setValue(request.getParams().get(key));
      paramlist.add(param);
    }
    return paramlist;
  }
}