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/*
 * Copyright (c) 2024 Contributors to the Eclipse Foundation.
 * Copyright (c) 2010, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.admin.rest.readers;

import jakarta.ws.rs.Consumes;
import jakarta.ws.rs.core.MediaType;
import jakarta.ws.rs.core.MultivaluedMap;
import jakarta.ws.rs.ext.MessageBodyReader;
import jakarta.ws.rs.ext.Provider;

import java.io.IOException;
import java.io.InputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Iterator;

import org.codehaus.jettison.json.JSONArray;
import org.codehaus.jettison.json.JSONObject;
import org.glassfish.api.admin.ParameterMap;

import static java.nio.charset.StandardCharsets.UTF_8;

/**
 * @author Ludovic Champenois
 */
@Consumes(MediaType.APPLICATION_JSON)
@Provider
public class JsonParameterMapProvider implements MessageBodyReader {

    @Override
    public boolean isReadable(Class type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return type.equals(ParameterMap.class);
    }

    @Override
    public ParameterMap readFrom(Class type, Type genericType, Annotation[] annotations, MediaType mediaType,
            MultivaluedMap headers, InputStream in) throws IOException {

        JSONObject obj;
        try {
            obj = new JSONObject(new String(in.readAllBytes(), UTF_8));
            Iterator iter = obj.keys();
            ParameterMap map = new ParameterMap();

            while (iter.hasNext()) {
                String k = (String) iter.next();
                Object value = obj.get(k);
                if (value instanceof JSONArray) {
                    JSONArray array = (JSONArray) value;
                    for (int i = 0; i < array.length(); i++) {
                        map.add(k, String.valueOf(array.get(i)));
                    }

                } else {
                    map.add(k, "" + value);
                }

            }
            return map;

        } catch (Exception ex) {
            ParameterMap map = new ParameterMap();
            map.add("error", "Entity Parsing Error: " + ex.getMessage());

            return map;
        }

    }
}