/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.ode.store;

import java.util.EnumSet;
import java.util.List;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.ode.bpel.dd.TCleanup;
import org.apache.ode.bpel.dd.TDeployment;
import org.apache.ode.bpel.iapi.ContextException;
import org.apache.ode.bpel.iapi.ProcessConf.CLEANUP_CATEGORY;

public class ProcessCleanupConfImpl {
    protected static Log __log = LogFactory.getLog(ProcessCleanupConfImpl.class);
    
    private final Set<CLEANUP_CATEGORY> successCategories = EnumSet.noneOf(CLEANUP_CATEGORY.class);
    private final Set<CLEANUP_CATEGORY> failureCategories = EnumSet.noneOf(CLEANUP_CATEGORY.class);
    
    // package default
    ProcessCleanupConfImpl(TDeployment.Process pinfo) {
        for( TCleanup cleanup : pinfo.getCleanupList() ) {
            if( cleanup.getOn() == TCleanup.On.SUCCESS || cleanup.getOn() == TCleanup.On.ALWAYS ) {
                processACleanup(successCategories, cleanup.getCategoryList());
            }
            if( cleanup.getOn() == TCleanup.On.FAILURE || cleanup.getOn() == TCleanup.On.ALWAYS ) {
                processACleanup(failureCategories, cleanup.getCategoryList());
            }
        }
        
        // validate configurations
        Set<CLEANUP_CATEGORY> categories = getCleanupCategories(true);
        if( categories.contains(CLEANUP_CATEGORY.INSTANCE) && !categories.containsAll(EnumSet.of(CLEANUP_CATEGORY.CORRELATIONS, CLEANUP_CATEGORY.VARIABLES))) {
            throw new ContextException("Cleanup configuration error: the instance category requires both the correlations and variables categories specified together!!!");
        }
        categories = getCleanupCategories(false);
        if( categories.contains(CLEANUP_CATEGORY.INSTANCE) && !categories.containsAll(EnumSet.of(CLEANUP_CATEGORY.CORRELATIONS, CLEANUP_CATEGORY.VARIABLES))) {
            throw new ContextException("Cleanup configuration error: the instance category requires both the correlations and variables categories specified together!!!");
        }
    }

    public static void processACleanup(Set<CLEANUP_CATEGORY> categories, List<TCleanup.Category.Enum> categoryList) {
        if( categoryList.isEmpty() ) {
            // add all categories
            categories.addAll(EnumSet.allOf(CLEANUP_CATEGORY.class));
        } else {
            for( TCleanup.Category.Enum aCategory : categoryList ) {
                if( aCategory == TCleanup.Category.ALL) {
                    // add all categories
                    categories.addAll(EnumSet.allOf(CLEANUP_CATEGORY.class));
                } else {
                    categories.add(CLEANUP_CATEGORY.fromString(aCategory.toString()));
                }
            }
        }
    }
    
    // package default
    boolean isCleanupCategoryEnabled(boolean instanceSucceeded, CLEANUP_CATEGORY category) {
        if( instanceSucceeded ) {
            return successCategories.contains(category);
        } else {
            return failureCategories.contains(category);
        }
    }
    
    // package default
    Set<CLEANUP_CATEGORY> getCleanupCategories(boolean instanceSucceeded) {
        return instanceSucceeded ? successCategories : failureCategories;
    }
}