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/*
 * Copyright 2018 jw362j.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.mycomm.YesHttp.core;

import java.io.IOException;
import java.io.OutputStream;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.Set;
import java.util.zip.GZIPOutputStream;

/**
 *
 * @author jw362j
 */
public abstract class JsonRequest extends BaseRequest {

    private GZIPOutputStream gZIPOutputStream;
    private final HttpObserver observer = new HttpObserver() {
        public void Observe(URLConnection connection) {
            if (!HttpMethod.POST.equals( getmMethod() ) && !HttpMethod.PUT.equals( getmMethod() )   ) {
                getLog().d("not post data not put in JsonRequest =====");
                return;
            }
            if (connection == null) {
                return;
            }
            connection.setRequestProperty("Content-Type", "application/json");
        }
    };

    public JsonRequest(String mUrl, Response.Listener response, Response.ErrorListener errorListener, short protocol) {
        super(HttpMethod.PUT, mUrl, response, errorListener, null,protocol);
    }
    
    public JsonRequest(String mUrl, Response.Listener response, Response.ErrorListener errorListener, YesLog log, short protocol) {
        super(HttpMethod.POST, mUrl, response, errorListener, log, protocol);
    }

    public JsonRequest(String mUrl, Response.Listener response, HttpObserver observer, Response.ErrorListener errorListener, YesLog log, short protocol) {
        super(HttpMethod.POST, mUrl, response, observer, errorListener, log, protocol);
    }

    @Override
    public HttpObserver getHttpObserver() {
        return observer;
    }

    public void write(OutputStream outputStream) {
        try {
            if (!HttpMethod.POST.equals( getmMethod() ) && !HttpMethod.PUT.equals( getmMethod() )   ) {
                getLog().d("not post data not put in JsonRequest =====xx");
                return;
            }
            
            String targetJsonData = JsonBodyBuilder();
            if (targetJsonData != null && targetJsonData.length() > 0) {
                getLog().d("the post data in  JsonRequest is:" + targetJsonData);
                if (useGzip()) {
                    gZIPOutputStream = new GZIPOutputStream(outputStream);
                    gZIPOutputStream.write(targetJsonData.getBytes(DEFAULT_PARAMS_ENCODING));
                    gZIPOutputStream.flush();
                    gZIPOutputStream.close();
                } else {
                    outputStream.write(targetJsonData.getBytes(DEFAULT_PARAMS_ENCODING));
                }
                return;
            }
            getParams(params);            
            if (params == null ||params.isEmpty()) {
                getLog().d("Params are null in Method.POST about JsonRequest,post body output give up ...");
                getErrorListener().onErrorResponse(new YesHttpError("JsonBodyBuilder() is returnning null value or getParams()returning the null parameters!"));
                return;
            }
            StringBuilder post_data_defaultJson = new StringBuilder();
            post_data_defaultJson.append("{");
            Set keys = params.keySet();
            for (String key : keys) {
                if(params.get(key) != null)post_data_defaultJson.append("\"").append(URLEncoder.encode(key,DEFAULT_PARAMS_ENCODING)).append("\"").append(":").append("\"").append(URLEncoder.encode(params.get(key),DEFAULT_PARAMS_ENCODING)).append("\"").append(",");
            }
            post_data_defaultJson.deleteCharAt(post_data_defaultJson.length() - 1);
            post_data_defaultJson.append("}");
            targetJsonData = post_data_defaultJson.toString();
            getLog().d("the post data in  JsonRequestA is:" + targetJsonData);

            if (useGzip()) {
                gZIPOutputStream = new GZIPOutputStream(outputStream);
                gZIPOutputStream.write(targetJsonData.getBytes(DEFAULT_PARAMS_ENCODING));
                gZIPOutputStream.flush();
                gZIPOutputStream.close();
            } else {
                outputStream.write(targetJsonData.getBytes(DEFAULT_PARAMS_ENCODING));
            }
        } catch (IOException ex) {
            getLog().e("Exception in StringRequest write:" + ex.getMessage());
        }
    }
    

    public abstract String JsonBodyBuilder();//have to build the json format request body ,if none-null is returned here,then would ignore getParams() method

}