/**
 * Copyright 2010 JBoss Inc
 *
 * 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.drools.command.runtime.process;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

import org.drools.command.Context;
import org.drools.command.impl.GenericCommand;
import org.drools.command.impl.KnowledgeCommandContext;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.impl.ExecutionResultImpl;
import org.drools.runtime.process.ProcessInstance;
import org.drools.xml.jaxb.util.JaxbMapAdapter;

@XmlAccessorType(XmlAccessType.NONE)
public class StartProcessCommand implements GenericCommand<ProcessInstance> {

	@XmlAttribute(required = true)
	private String processId;
	
	@XmlJavaTypeAdapter(JaxbMapAdapter.class)
	@XmlElement(name="parameter")
	private Map<String, Object> parameters = new HashMap<String, Object>();
	
	@XmlElementWrapper(name="data")
	private List<Object> data = null;
	@XmlAttribute(name="out-identifier")
    private String outIdentifier;

	public StartProcessCommand() {
	}

	public StartProcessCommand(String processId) {
		this.processId = processId;
	}

	public StartProcessCommand(String processId, String outIdentifier) {
	    this(processId);
        this.outIdentifier = outIdentifier;
    }

	public StartProcessCommand(String processId, Map<String, Object> parameters) {
		this(processId);
		this.parameters = parameters; 
	}

	public StartProcessCommand(String processId, Map<String, Object> parameters, String outIdentifier) {
        this(processId, outIdentifier);
        this.parameters = parameters; 
    }

	public String getProcessId() {
		return processId;
	}

	public void setProcessId(String processId) {
		this.processId = processId;
	}

	public Map<String, Object> getParameters() {
		return parameters;
	}

	public void setParameters(Map<String, Object> parameters) {
		this.parameters = parameters;
	}

	public void putParameter(String key, Object value) {
		getParameters().put(key, value);
	}
	
	public List<Object> getData() {
		return data;
	}

	public void setData(List<Object> data) {
		this.data = data;
	}

	public void setOutIdentifier(String outIdentifier) {
        this.outIdentifier = outIdentifier;
    }

    public String getOutIdentifier() {
        return outIdentifier;
    }

    public ProcessInstance execute(Context context) {
		StatefulKnowledgeSession ksession = ((KnowledgeCommandContext) context).getStatefulKnowledgesession();

		if (data != null) {
			for (Object o: data) {
				ksession.insert(o);
			}
		}
		ProcessInstance processInstance = (ProcessInstance) ksession.startProcess(processId, parameters);
		if ( this.outIdentifier != null ) {
		    ((ExecutionResultImpl) ((KnowledgeCommandContext) context).getExecutionResults()).getResults().put(this.outIdentifier,
		                                                                                                       processInstance.getId());
		}
		return processInstance;
	}

	public String toString() {
		String result = "session.startProcess(" + processId + ", [";
		if (parameters != null) {
			int i = 0;
			for (Map.Entry<String, Object> entry: parameters.entrySet()) {
				if (i++ > 0) {
					result += ", ";
				}
				result += entry.getKey() + "=" + entry.getValue();
			}
		}
		result += "]);";
		return result;
	}
}