/*
 *   Copyright (C) 2005 Christian Schulte <cs@schulte.it>
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     o Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     o 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.
 *
 *   THIS SOFTWARE IS PROVIDED "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 AUTHORS OR COPYRIGHT HOLDERS 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.
 *
 *   $JOMC: ModelValidationReport.java 5269 2016-08-11 23:38:09Z schulte $
 *
 */
package org.jomc.modlet;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.logging.Level;
import javax.xml.bind.JAXBElement;

/**
 * {@code Model} validation report.
 *
 * @author <a href="mailto:cs@schulte.it">Christian Schulte</a>
 * @version $JOMC: ModelValidationReport.java 5269 2016-08-11 23:38:09Z schulte $
 */
public class ModelValidationReport implements Serializable
{

    /**
     * Report detail.
     */
    public static class Detail implements Serializable
    {

        /**
         * Serial version UID for backwards compatibility with 1.0.x object streams.
         */
        private static final long serialVersionUID = -2466230076806042116L;

        /**
         * The detail identifier.
         *
         * @serial
         */
        private final String identifier;

        /**
         * The detail level.
         *
         * @serial
         */
        private final Level level;

        /**
         * The detail message.
         *
         * @serial
         */
        private final String message;

        /**
         * The JAXB element this detail is associated with.
         *
         * @serial
         */
        private final JAXBElement<?> element;

        /**
         * Creates a new {@code Detail} taking an identifier, a level, a message and an element.
         *
         * @param identifier The detail identifier.
         * @param level The detail level.
         * @param message The detail message.
         * @param element The detail element.
         */
        public Detail( final String identifier, final Level level, final String message, final JAXBElement<?> element )
        {
            this.identifier = identifier;
            this.level = level;
            this.message = message;
            this.element = element;
        }

        /**
         * Gets the identifier of this detail.
         *
         * @return The identifier of this detail or {@code null}.
         */
        public String getIdentifier()
        {
            return this.identifier;
        }

        /**
         * Gets the level of this detail.
         *
         * @return The level of this detail or {@code null}.
         */
        public Level getLevel()
        {
            return this.level;
        }

        /**
         * Gets the message of this detail.
         *
         * @return The message of this detail or {@code null}.
         */
        public String getMessage()
        {
            return this.message;
        }

        /**
         * Gets the JAXB element of this detail.
         *
         * @return The JAXB element of this detail or {@code null}.
         */
        public JAXBElement<?> getElement()
        {
            return this.element;
        }

        /**
         * Creates and returns a string representation of the object.
         *
         * @return A string representation of the object.
         */
        private String toStringInternal()
        {
            return new StringBuilder( 200 ).append( '{' ).
                append( "identifier=" ).append( this.getIdentifier() ).
                append( ", level=" ).append( this.getLevel().getLocalizedName() ).
                append( ", message=" ).append( this.getMessage() ).
                append( ", element=" ).append( this.getElement() ).append( '}' ).toString();

        }

        /**
         * Creates and returns a string representation of the object.
         *
         * @return A string representation of the object.
         */
        @Override
        public String toString()
        {
            return super.toString() + this.toStringInternal();
        }

    }

    /**
     * Serial version UID for backwards compatibility with 1.0.x object streams.
     */
    private static final long serialVersionUID = 6688024709865043122L;

    /**
     * Details of the instance.
     *
     * @serial
     */
    private final List<Detail> details = new CopyOnWriteArrayList<Detail>();

    /**
     * Creates a new {@code ModelValidationReport} instance.
     */
    public ModelValidationReport()
    {
        super();
    }

    /**
     * Gets all details of the instance.
     * <p>
     * This accessor method returns a reference to the live list, not a snapshot. Therefore any modification you make
     * to the returned list will be present inside the object. This is why there is no {@code set} method for the
     * details property.
     * </p>
     *
     * @return All details of the instance.
     */
    public List<Detail> getDetails()
    {
        return this.details;
    }

    /**
     * Gets all details of the instance matching a given identifier.
     *
     * @param identifier The identifier of the details to return or {@code null}.
     *
     * @return An unmodifiable list containing all details of the instance matching {@code identifier}.
     */
    public List<Detail> getDetails( final String identifier )
    {
        final List<Detail> list = new ArrayList<Detail>( this.getDetails().size() );

        for ( final Detail detail : this.getDetails() )
        {
            if ( identifier == null && detail.getIdentifier() == null )
            {
                list.add( detail );
            }
            if ( identifier != null && identifier.equals( detail.getIdentifier() ) )
            {
                list.add( detail );
            }
        }

        return Collections.unmodifiableList( list );
    }

    /**
     * Gets a flag indicating model validity.
     *
     * @return {@code true}, if all details are set to a level lower or equal to {@code WARNING}; {@code false}, if at
     * least one detail is set to a level higher than {@code WARNING}.
     *
     * @see #getDetails()
     */
    public boolean isModelValid()
    {
        for ( final Detail detail : this.getDetails() )
        {
            if ( detail.getLevel() != null && detail.getLevel().intValue() > Level.WARNING.intValue() )
            {
                return false;
            }
        }

        return true;
    }

}