/*

 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package build.tools.cldrconverter;

import java.io.File;

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

import java.util.stream.Stream;

import org.xml.sax.Attributes;

import org.xml.sax.InputSource;

import org.xml.sax.SAXException;

/**

 * Handles parsing of files in Locale Data Markup Language for

 * SupplementalMetadata.xml

 */

class SupplementalMetadataParseHandler extends AbstractLDMLHandler<Object> {

    private final Map<String, String> languageAliasMap;

    SupplementalMetadataParseHandler() {

        languageAliasMap = new HashMap<>();

    }

    @Override

    public InputSource resolveEntity(String publicID, String systemID) throws IOException, SAXException {

        // avoid HTTP traffic to unicode.org

        if (systemID.startsWith(CLDRConverter.SPPL_LDML_DTD_SYSTEM_ID)) {

            return new InputSource((new File(CLDRConverter.LOCAL_SPPL_LDML_DTD)).toURI().toString());

        }

        return null;

    }

    @Override

    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {

        switch (qName) {

        case "zoneAlias":

            String reason = attributes.getValue("reason");

            if ("deprecated".equals(reason)) {

                put(attributes.getValue("type"), attributes.getValue("replacement"));

            }

            pushIgnoredContainer(qName);

            break;

        case "languageAlias":

            String aliasReason = attributes.getValue("reason");

            if ("deprecated".equals(aliasReason) || "legacy".equals(aliasReason)) {

                String tag = attributes.getValue("type");

                if (!checkLegacyLocales(tag)) {

                   languageAliasMap.put(tag.replaceAll("_", "-"),

                   attributes.getValue("replacement").replaceAll("_", "-"));

                }

            }

            pushIgnoredContainer(qName);

            break;

        default:

            // treat anything else as a container

            pushContainer(qName, attributes);

            break;

        }

    }

    public Stream<String> deprecatedMap() {

        return keySet().stream()

                .map(k -> String.format("        \"%s\", \"%s\",", k, get(k)))

                .sorted();

    }

    Map<String, String> getLanguageAliasData() {

        return languageAliasMap;

    }

    // skip language aliases for JDK legacy locales for ISO compatibility

    private boolean checkLegacyLocales(String tag) {

        return (tag.startsWith("no") || tag.startsWith("in")

                || tag.startsWith("iw") || tag.startsWith("ji"));

    }

}