/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.artemis.audit.legacy;

import lombok.extern.slf4j.Slf4j;

import org.hisp.dhis.audit.AuditScope;
import org.hisp.dhis.audit.AuditType;
import org.hisp.dhis.commons.util.DebugUtils;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * A factory for constructing {@see org.hisp.dhis.audit.Audit} data payloads.
 * This can be the object itself (as is the case for metadata), or it can be a
 * wrapper object collecting the parts wanted.
 *
 * @author Luciano Fiandesio
 */
@Slf4j
@Component
public class DefaultAuditObjectFactory implements AuditObjectFactory
{
    private final ObjectMapper objectMapper;

    public DefaultAuditObjectFactory( @Qualifier( "hibernateAwareJsonMapper" ) ObjectMapper objectMapper )
    {
        this.objectMapper = objectMapper;
    }

    @Override
    public Object create( AuditScope auditScope, AuditType auditType, Object object, String user )
    {
        switch ( auditScope )
        {
        case METADATA:
            return handleMetadataAudit( object );
        case TRACKER:
            return handleTracker( object );
        case AGGREGATE:
            return handleAggregate( object );
        }
        return null;
    }

    private String handleTracker( Object object )
    {
        return toJson( object );
    }

    private String handleAggregate( Object object )
    {
        return toJson( object );
    }

    private String handleMetadataAudit( Object object )
    {
        return toJson( object );
    }

    private String toJson( Object object )
    {
        try
        {
            return objectMapper.writeValueAsString( object );
        }
        catch ( JsonProcessingException e )
        {
            log.error( DebugUtils.getStackTrace( e ) );
        }
        return null;
    }
}