/*******************************************************************************
 *  Copyright (c) 2000, 2017 IBM Corporation and others.
 *
 *  This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License 2.0
 *  which accompanies this distribution, and is available at
 *  https://www.eclipse.org/legal/epl-2.0/
 *
 *  SPDX-License-Identifier: EPL-2.0
 *
 *  Contributors:
 *     IBM Corporation - initial API and implementation
 *     Red Hat Inc. - 406902 (nested categories)
 *******************************************************************************/
package org.eclipse.equinox.internal.p2.updatesite;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.*;

/**
 * A category in an update site.
 *
 * Based on org.eclipse.update.core.model.CategoryModel.
 */
public class SiteCategory {

	private static Comparator<SiteCategory> comp;
	private String description;
	private String label;
	private String name;
	private List<String> categoryNames;
	private Map<Locale, Map<String, String>> localizations;

	/**
	 * Returns a comparator for category models.
	 *
	 * @return comparator
	 * @since 2.0
	 */
	public static Comparator<SiteCategory> getComparator() {
		if (comp == null) {
			/*
			 * Returns 0 if versions are equal.
			 * Returns -1 if object1 is after than object2.
			 * Returns +1 if object1 is before than object2.
			 */
			comp = (cat1, cat2) -> {

				if (cat1.equals(cat2))
					return 0;
				return cat1.getName().compareTo(cat2.getName());
			};
		}
		return comp;
	}

	/**
	 * Creates an uninitialized model object.
	 *
	 * @since 2.0
	 */
	public SiteCategory() {
		super();
	}

	/**
	 * Compare two category models for equality.
	 *
	 * @see Object#equals(Object)
	 * @since 2.0
	 */
	@Override
	public boolean equals(Object obj) {
		boolean result = false;
		if (obj instanceof SiteCategory) {
			SiteCategory otherCategory = (SiteCategory) obj;
			result = getName().equalsIgnoreCase(otherCategory.getName());
		}
		return result;
	}

	/**
	 * Retrieve the detailed category description
	 *
	 * @return category description, or <code>null</code>.
	 * @since 2.0
	 */
	public String getDescription() {
		return description;
	}

	/**
	 * Retrieve the non-localized displayable label for the category.
	 *
	 * @return non-localized displayable label, or <code>null</code>.
	 * @since 2.0
	 */
	public String getLabel() {
		return label;
	}

	/**
	 * Gets the localizations for the site as a map from locale
	 * to the set of translated properties for that locale.
	 *
	 * @return a map from locale to property set
	 * @since 3.4
	 */
	public Map<Locale, Map<String, String>> getLocalizations() {
		return this.localizations;
	}

	/**
	 * Retrieve the name of the category.
	 *
	 * @return category name, or <code>null</code>.
	 * @since 2.0
	 */
	public String getName() {
		return name;
	}

	/**
	 * Compute hash code for category model.
	 *
	 * @see Object#hashCode()
	 * @since 2.0
	 */
	@Override
	public int hashCode() {
		return getName().hashCode();
	}

	/**
	 * Resolve the model object.
	 * Any URL strings in the model are resolved relative to the
	 * base URL argument. Any translatable strings in the model that are
	 * specified as translation keys are localized using the supplied
	 * resource bundle.
	 *
	 * @param base URL
	 * @param bundleURL resource bundle URL
	 * @exception MalformedURLException
	 * @since 2.0
	 */
	public void resolve(URL base, URL bundleURL) throws MalformedURLException {
		// resolve local elements
		//		localizedLabel = resolveNLString(bundleURL, label);

		// delegate to references
		//		resolveReference(getDescriptionModel(), base, bundleURL);
	}

	/**
	 * Sets the category description.
	 * Throws a runtime exception if this object is marked read-only.
	 *
	 * @param description category description
	 * @since 2.0
	 */
	public void setDescription(String description) {
		this.description = description;
	}

	/**
	 * Sets the category displayable label.
	 * Throws a runtime exception if this object is marked read-only.
	 *
	 * @param label displayable label, or resource key
	 * @since 2.0
	 */
	public void setLabel(String label) {
		this.label = label;
	}

	/**
	 * Sets the localizations for the site as a map from locale
	 * to the set of translated properties for that locale.
	 *
	 * @param localizations as a map from locale to property set
	 * @since 3.4
	 */
	public void setLocalizations(Map<Locale, Map<String, String>> localizations) {
		this.localizations = localizations;
	}

	/**
	 * Sets the category name.
	 * Throws a runtime exception if this object is marked read-only.
	 *
	 * @param name category name
	 * @since 2.0
	 */
	public void setName(String name) {
		this.name = name;
	}

	/**
	 * Adds the name of a category this bundle belongs to.
	 * Throws a runtime exception if this object is marked read-only.
	 *
	 * @param categoryName category name
	 */
	public void addCategoryName(String categoryName) {
		if (this.categoryNames == null) {
			this.categoryNames = new ArrayList<>();
		}
		if (!this.categoryNames.contains(categoryName)) {
			this.categoryNames.add(categoryName);
		}
	}

	/**
	 * Returns the names of categories the referenced feature belongs to.
	 *
	 * @return an array of names, or an empty array.
	 */
	public String[] getCategoryNames() {
		if (categoryNames == null)
			return new String[0];

		return categoryNames.toArray(new String[0]);
	}

}