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/*
 * Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH
 * under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership. Camunda licenses this file to you under the Apache License,
 * Version 2.0; 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.camunda.bpm.model.bpmn.builder;

import java.util.Collection;
import org.camunda.bpm.model.bpmn.BpmnModelInstance;
import org.camunda.bpm.model.bpmn.instance.Process;
import org.camunda.bpm.model.bpmn.instance.StartEvent;
import org.camunda.bpm.model.bpmn.instance.SubProcess;
import org.camunda.bpm.model.bpmn.instance.bpmndi.BpmnShape;
import org.camunda.bpm.model.bpmn.instance.dc.Bounds;

/**
 * @author Sebastian Menski
 */
public class ProcessBuilder extends AbstractProcessBuilder {

  public ProcessBuilder(BpmnModelInstance modelInstance, Process process) {
    super(modelInstance, process, ProcessBuilder.class);
  }

  public StartEventBuilder startEvent() {
    return startEvent(null);
  }

  public StartEventBuilder startEvent(String id) {
    StartEvent start = createChild(StartEvent.class, id);
    BpmnShape bpmnShape = createBpmnShape(start);
    setCoordinates(bpmnShape);
    return start.builder();
  }

  public EventSubProcessBuilder eventSubProcess(){
    return eventSubProcess(null);
  }

  public EventSubProcessBuilder eventSubProcess(String id) {
    // Create a subprocess, triggered by an event, and add it to modelInstance
    SubProcess subProcess = createChild(SubProcess.class, id);
    subProcess.setTriggeredByEvent(true);

    // Create Bpmn shape so subprocess will be drawn
    BpmnShape targetBpmnShape = createBpmnShape(subProcess);
    //find the lowest shape in the process
    // place event sub process underneath
    setEventSubProcessCoordinates(targetBpmnShape);

    resizeSubProcess(targetBpmnShape);

    // Return the eventSubProcessBuilder
    EventSubProcessBuilder eventSubProcessBuilder = new EventSubProcessBuilder(modelInstance, subProcess);
    return eventSubProcessBuilder;

  }

  @Override
  protected void setCoordinates(BpmnShape targetBpmnShape) {
    Bounds bounds = targetBpmnShape.getBounds();
    bounds.setX(100);
    bounds.setY(100);
  }

  protected void setEventSubProcessCoordinates(BpmnShape targetBpmnShape) {
    SubProcess eventSubProcess = (SubProcess) targetBpmnShape.getBpmnElement();
    Bounds targetBounds = targetBpmnShape.getBounds();
    double lowestheight = 0;

    // find the lowest element in the model
    Collection allShapes = modelInstance.getModelElementsByType(BpmnShape.class);
    for (BpmnShape shape : allShapes) {
      Bounds bounds = shape.getBounds();
      double bottom = bounds.getY() + bounds.getHeight();
      if(bottom > lowestheight) {
        lowestheight = bottom;
      }
    }

    Double ycoord = lowestheight + 50.0;
    Double xcoord = 100.0;

    // move target
    targetBounds.setY(ycoord);
    targetBounds.setX(xcoord);
  }
}