/*
 * Copyright 2010 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.
 * 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.jbpm.workflow.core.node;

import java.io.Serializable;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.jbpm.process.core.context.variable.Mappable;
import org.jbpm.workflow.core.impl.DataAssociation;
import org.jbpm.workflow.core.impl.DataDefinition;

public class Trigger implements Mappable, Serializable {

    private static final long serialVersionUID = 510l;

    private List<DataAssociation> inMapping = new LinkedList<>();

    public void addInMapping(String mapping) {
        addInMapping(mapping, mapping);
    }

    public void addInMapping(String source, String target) {
        inMapping.add(new DataAssociation(DataDefinition.toSimpleDefinition(source), DataDefinition.toSimpleDefinition(target), null, null));
    }

    public void setInMappings(Map<String, String> inMapping) {
        this.inMapping = new LinkedList<>();
        for (Map.Entry<String, String> entry : inMapping.entrySet()) {
            addInMapping(entry.getKey(), entry.getValue());
        }
    }

    public String getInMapping(String parameterName) {
        return getInMappings().get(parameterName);
    }

    public Map<String, String> getInMappings() {
        Map<String, String> in = new HashMap<>();
        for (DataAssociation a : inMapping) {
            if (a.getSources().size() == 1 && (a.getAssignments() == null || a.getAssignments().isEmpty()) && a.getTransformation() == null) {
                in.put(a.getSources().get(0).getLabel(), a.getTarget().getLabel());
            }
        }
        return in;
    }

    public void addInAssociation(DataAssociation dataAssociation) {
        inMapping.add(dataAssociation);
    }

    public List<DataAssociation> getInAssociations() {
        return Collections.unmodifiableList(inMapping);
    }

    public void addOutMapping(String subVariableName, String variableName) {
        throw new IllegalArgumentException(
                "A trigger does not support out mappings");
    }

    public void setOutMappings(Map<String, String> outMapping) {
        throw new IllegalArgumentException(
                "A trigger does not support out mappings");
    }

    public String getOutMapping(String parameterName) {
        throw new IllegalArgumentException(
                "A trigger does not support out mappings");
    }

    public Map<String, String> getOutMappings() {
        throw new IllegalArgumentException(
                "A trigger does not support out mappings");
    }

    public void addOutAssociation(DataAssociation dataAssociation) {
        throw new IllegalArgumentException(
                "A trigger does not support out mappings");
    }

    public List<DataAssociation> getOutAssociations() {
        throw new IllegalArgumentException(
                "A trigger does not support out mappings");
    }
}
