/*******************************************************************************
 * Copyright (c) 2012-2016 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.everrest.core.impl.header;

import org.everrest.core.header.QualityValue;

import javax.ws.rs.ext.RuntimeDelegate;
import java.util.Locale;

/**
 * @author andrew00x
 */
public class AcceptLanguage implements QualityValue {
    /** Default accepted language, it minds any language is acceptable. */
    public static final AcceptLanguage DEFAULT = new AcceptLanguage(new Locale("*"));

    /**
     * Creates a new instance of AcceptedLanguage by parsing the supplied string.
     *
     * @param header
     *         accepted language string
     * @return AcceptedLanguage
     */
    public static AcceptLanguage valueOf(String header) {
        return RuntimeDelegate.getInstance().createHeaderDelegate(AcceptLanguage.class).fromString(header);
    }


    private final Language language;
    /** Quality value for 'accepted' HTTP headers, e. g. en-gb;0.9 */
    private final float qValue;

    /**
     * Constructs new instance of accepted language with default quality value.
     *
     * @param language
     *         the language
     */
    public AcceptLanguage(Language language) {
        this.language = language;
        qValue = DEFAULT_QUALITY_VALUE;
    }

    /**
     * Constructs new instance of accepted language with quality value.
     *
     * @param language
     *         the language
     * @param qValue
     *         quality value
     */
    public AcceptLanguage(Language language, float qValue) {
        this.language = language;
        this.qValue = qValue;
    }

    public AcceptLanguage(Locale locale, float qValue) {
        this(new Language(locale), qValue);
    }

    public AcceptLanguage(Locale locale) {
        this(new Language(locale));
    }

    public Language getLanguage() {
        return language;
    }

    public String getPrimaryTag() {
        return language.getPrimaryTag();
    }

    public String getSubTag() {
        return language.getSubTag();
    }

    public Locale getLocale() {
        return language.getLocale();
    }

    public boolean isCompatible(AcceptLanguage other) {
        if (other == null) {
            return false;
        }
        return isCompatible(other.getLanguage());
    }

    public boolean isCompatible(Language other) {
        return language.isCompatible(other);
    }

    @Override
    public float getQvalue() {
        return qValue;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof AcceptLanguage)) {
            return false;
        }

        AcceptLanguage other = (AcceptLanguage)o;
        return Float.compare(other.qValue, qValue) == 0 && language.equals(other.language);
    }

    @Override
    public int hashCode() {
        int hashcode = 8;
        hashcode = hashcode * 31 + (qValue == 0.0F ? 0 : Float.floatToIntBits(qValue));
        hashcode = hashcode * 31 + language.hashCode();
        return hashcode;
    }

    @Override
    public String toString() {
        return RuntimeDelegate.getInstance().createHeaderDelegate(AcceptLanguage.class).toString(this);
    }
}