/*

 * Copyright (c) 2012, 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

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package build.tools.cldrconverter;

import java.io.File;

import java.io.IOException;

import java.util.*;

import java.util.stream.*;

import org.xml.sax.Attributes;

import org.xml.sax.InputSource;

import org.xml.sax.SAXException;

class MetaZonesParseHandler extends AbstractLDMLHandler<String> {

    final static String NO_METAZONE_KEY = "no.metazone.defined";

    private String tzid, metazone;

    // for java.time.format.ZoneNames.java

    private List<String> mzoneMapEntryList = new ArrayList<>();

    private Map<String, String> zones = new HashMap<>();

    MetaZonesParseHandler() {

    }

    @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;

    }

    // metaZone: ID -> metazone

    // per locale: ID -> names, metazone -> names

    @Override

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

        switch (qName) {

        case "timezone":

            tzid = attributes.getValue("type");

            pushContainer(qName, attributes);

            break;

        case "usesMetazone":

            // Ignore any historical zone names (for now)

            if (attributes.getValue("to") == null) {

                metazone = attributes.getValue("mzone");

            }

            pushIgnoredContainer(qName);

            break;

        case "mapZone":

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

            if (territory.equals("001")) {

                zones.put(attributes.getValue("other"), attributes.getValue("type"));

            } else {

                mzoneMapEntryList.add(String.format("        \"%s\", \"%s\", \"%s\",",

                    attributes.getValue("other"),

                    territory,

                    attributes.getValue("type")));

            }

            pushIgnoredContainer(qName);

            break;

        case "version":

        case "generation":

            pushIgnoredContainer(qName);

            break;

        default:

            // treat anything else as a container

            pushContainer(qName, attributes);

            break;

        }

    }

    @Override

    public void endElement(String uri, String localName, String qName) throws SAXException {

        assert qName.equals(currentContainer.getqName()) : "current=" + currentContainer.getqName() + ", param=" + qName;

        switch (qName) {

        case "timezone":

            if (tzid == null) {

                throw new InternalError();

            } else if (metazone == null) {

                String no_meta = get(NO_METAZONE_KEY);

                put(NO_METAZONE_KEY, no_meta == null ? tzid : no_meta + " " + tzid);

                CLDRConverter.info("No metazone defined for %s%n", tzid);

            } else {

                put(tzid, metazone);

            }

            tzid = null;

            metazone = null;

            break;

        }

        currentContainer = currentContainer.getParent();

    }

    public Map<String, String> zidMap() {

        return zones;

    }

    public Stream<String> mzoneMapEntry() {

        return mzoneMapEntryList.stream();

    }

}