package module.fileManagement.domain.metadata;

import module.fileManagement.domain.FileManagementSystem;
import pt.ist.fenixWebFramework.services.Service;

public class MetadataKey extends MetadataKey_Base implements Comparable<MetadataKey> {

    public static final String TEMPLATE_KEY_VALUE = "Tipologia";
    public static final String DISPLAYNAME_KEY_VALUE = "Nome";
    public static final String FILENAME_KEY_VALUE = "Nome do Ficheiro";
    public static final String SAVE_ACCESS_LOG = "save.access.log";
    public static final String DOCUMENT_NEW_VERSION_KEY = "document.new.version.key.value";

    public MetadataKey() {
        super();
        FileManagementSystem.getInstance().addMetadataKeys(this);
    }

    public MetadataKey(String keyValue) {
        this(keyValue, Boolean.FALSE, StringMetadata.class);
    }

    public MetadataKey(String keyValue, Boolean reserved, Class<? extends Metadata> classType) {
        this();
        setKeyValue(keyValue);
        setReserved(reserved);
        setMetadataValueType(classType);
    }

    public static MetadataKey getTemplateKey() {
        return getOrCreateInstance(TEMPLATE_KEY_VALUE, Boolean.TRUE, StringMetadata.class);
    }

    public static MetadataKey getFilenameKey() {
        return getOrCreateInstance(FILENAME_KEY_VALUE, Boolean.TRUE, StringMetadata.class);
    }

    public static MetadataKey getDisplaynameKey() {
        return getOrCreateInstance(DISPLAYNAME_KEY_VALUE, Boolean.TRUE, StringMetadata.class);
    }

    public static MetadataKey getSaveLogKey() {
        return getOrCreateInstance(SAVE_ACCESS_LOG, Boolean.TRUE, StringMetadata.class);
    }

    public static MetadataKey getNewDocumentVersionKey() {
        return getOrCreateInstance(DOCUMENT_NEW_VERSION_KEY, Boolean.TRUE, StringMetadata.class);
    }

    public static MetadataKey getOrCreateInstance(final String keyValue) {
        return getOrCreateInstance(keyValue, Boolean.FALSE, StringMetadata.class);
    }

    public static MetadataKey getOrCreateInstance(final String keyValue, final Class<? extends Metadata> classType) {
        return getOrCreateInstance(keyValue, Boolean.FALSE, classType);
    }

    public static MetadataKey getOrCreateInstance(final String keyValue, final Boolean reserved) {
        return getOrCreateInstance(keyValue, reserved, StringMetadata.class);
    }

    @Service
    public static MetadataKey getOrCreateInstance(final String keyValue, final Boolean reserved,
            final Class<? extends Metadata> classType) {
        MetadataKey metadataKey = FileManagementSystem.getInstance().getMetadataKey(keyValue, reserved, classType);
        if (metadataKey == null) {
            metadataKey = new MetadataKey(keyValue, reserved, classType);
        }
        return metadataKey;
    }

    @Service
    public void delete() {
        if (hasAnyMetadata() || hasAnyRule()) {
            return;
        }
        getTemplates().clear();
        FileManagementSystem.getInstance().removeMetadataKeys(this);
        deleteDomainObject();
    }

    @Override
    public int compareTo(MetadataKey o) {
        return getKeyValue().compareTo(o.getKeyValue());
    }

    public Metadata createMetadata(Object value) {
        final Class metadataValueType = getMetadataValueType();
        try {
            final Metadata newInstance = (Metadata) metadataValueType.newInstance();
            newInstance.setMetadataKey(this);
            newInstance.setValue(value);
            return newInstance;
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        return null;
    }

    public Class getKeyPrimitiveType() {
        return Metadata.getMetadataType(getMetadataValueType());
    }

    public boolean isReserved() {
        return getReserved() != null && getReserved();
    }

    @Override
    public String toString() {
        return String.format("%s : %s (%s)", getKeyValue(), getMetadataValueType().getSimpleName(), isReserved());
    }

}