/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * 
 *      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.jbpm.services.task.admin.listener.internal;

import java.util.Objects;
import org.jbpm.services.task.commands.TaskCommand;
import org.kie.api.runtime.Context;
import org.kie.api.task.model.TaskSummary;
import org.kie.internal.command.ProcessInstanceIdCommand;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlSchemaType;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@XmlRootElement(name="get-current-tx-tasks-command")
@XmlAccessorType(XmlAccessType.NONE)
public class GetCurrentTxTasksCommand extends TaskCommand<List<TaskSummary>> implements ProcessInstanceIdCommand {

    /** Generated serial version UID */
	private static final long serialVersionUID = 6474368266134150938L;

	@XmlElement(required=true)
	@XmlSchemaType(name="long")
	private Long processInstanceId;
	
	public GetCurrentTxTasksCommand() {
	   // default constructor 
	}
	
	public GetCurrentTxTasksCommand(Long processInstanceId) {
		this.processInstanceId = processInstanceId;
	}

	@Override
	public Long getProcessInstanceId() {
        return processInstanceId;
    }

	@Override
    public void setProcessInstanceId( Long processInstanceId ) {
        this.processInstanceId = processInstanceId;
    }

    @SuppressWarnings("unchecked")
	@Override
	public List<TaskSummary> execute(Context context ) {
		List<TaskSummary> tasks = new ArrayList<TaskSummary>();
		Set<TaskSummary> tasksToRemove = (Set<TaskSummary>) context.get("local:current-tasks");
        if (tasksToRemove != null) {
        	for (TaskSummary task : tasksToRemove) {
        		if (Objects.equals(task.getProcessInstanceId(), processInstanceId)) {
        			tasks.add(task);
        		}
        	}
        }
        return tasks;
	}
	
}