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package jpaoletti.jpm.core;

import java.util.ArrayList;
import java.util.List;

/**
 * Encapsulate a list of highlights
 *
 * @author jpaoletti
 */
public class Highlights extends PMCoreObject {

    private static final String INSTANCE = "instance";
    private List highlights;

    /**
     * Return the index of the given hightlight in the list
     *
     * @param highlight The highlight
     * @return The indec
     */
    public int indexOf(Highlight highlight) {
        return getHighlights().indexOf(highlight);
    }

    /**
     * Return the first highlight that matches the given instance in the given
     * field of the given entity
     *
     * @param entity The entity
     * @param field The field
     * @param instance The instance
     * @return The highlight
     */
    public Highlight getHighlight(Entity entity, Field field, Object instance) {
        if (field == null) {
            return getHighlight(entity, instance);
        }
        for (Highlight highlight : highlights) {
            if (!highlight.getScope().equals(INSTANCE)) {
                if (match(instance, field, highlight)) {
                    return highlight;
                }
            }
        }
        return null;
    }

    /**
     * Return all the highlights that matches the given instance in the given
     * field of the given entity
     *
     * @param entity The entity
     * @param field The field
     * @param instance The instance
     * @return The highlight
     */
    public List getHighlights(Entity entity, Field field, Object instance) {
        if (field == null) {
            return getHighlights(entity, instance);
        }
        final List result = new ArrayList();
        for (Highlight highlight : highlights) {
            if (!highlight.getScope().equals(INSTANCE)) {
                if (match(instance, field, highlight)) {
                    result.add(highlight);
                }
            }
        }
        return result;
    }

    /**
     * Return the first highlight that match in any value of this instance with
     * some of the highlights values.
     *
     * @param entity The entity
     * @param instance The instance
     * @return The Highlinght
     */
    public Highlight getHighlight(Entity entity, Object instance) {
        for (Highlight highlight : highlights) {
            if (highlight.getScope().equals(INSTANCE)) {
                for (Field field : entity.getOrderedFields()) {
                    if (match(instance, field, highlight)) {
                        return highlight;
                    }
                }
            }
        }
        return null;
    }

    /**
     * Return all the highlights that match in any value of this instance with
     * some of the highlights values.
     *
     * @param entity The entity
     * @param instance The instance
     * @return The Highlinght
     */
    public List getHighlights(Entity entity, Object instance) {
        final List result = new ArrayList();
        for (Highlight highlight : highlights) {
            if (highlight.getScope().equals(INSTANCE)) {
                for (Field field : entity.getOrderedFields()) {
                    if (match(instance, field, highlight)) {
                        result.add(highlight);
                    }
                }
            }
        }
        return result;
    }

    /**
     * Indicate if the field of the given instance matches with the given
     * highlight
     *
     * @param instance The instance
     * @param field The field
     * @param highlight The highlight
     * @return true if match
     */
    protected boolean match(Object instance, Field field, Highlight highlight) {
        try {
            Object o = getPm().get(instance, field.getProperty());
            if (o != null && o.toString().equals(highlight.getValue()) && highlight.getField().equals(field.getId())) {
                return true;
            }
        } catch (Exception e) {
        }
        return false;
    }

    /**
     * @param highlights the highlights to set
     */
    public void setHighlights(List highlights) {
        this.highlights = highlights;
    }

    /**
     * @return the highlights
     */
    public List getHighlights() {
        return highlights;
    }
}