/**
 * Copyright (C) 2016 Bruno Candido Volpato da Cunha (brunocvcunha@gmail.com)
 *
 * 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 org.brunocvcunha.instagram4j.requests;

import java.io.IOException;
import java.io.UnsupportedEncodingException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.util.EntityUtils;
import org.brunocvcunha.instagram4j.InstagramConstants;
import org.brunocvcunha.instagram4j.util.InstagramHashUtil;

import lombok.extern.log4j.Log4j;

/**
 * 
 * @author brunovolpato
 *
 */
@Log4j
public abstract class InstagramPostRequest<T> extends InstagramRequest<T> {

    @Override
    public String getMethod() {
        return "POST";
    }
    
    @Override
    public T execute() throws ClientProtocolException, IOException {
        HttpPost post = new HttpPost(InstagramConstants.API_URL + getUrl());
        
        this.applyHeaders(post);
        
        log.debug("User-Agent: " + InstagramConstants.USER_AGENT);
        
        post.setEntity(getPayloadEntity());
        
        HttpResponse response = api.executeHttpRequest(post);
        
        int resultCode = response.getStatusLine().getStatusCode();
        String content = EntityUtils.toString(response.getEntity());
        
        post.releaseConnection();

        return parseResult(resultCode, content);
    }
    
    @Override
    public HttpEntity getPayloadEntity() throws UnsupportedEncodingException {
    	String payload = getPayload();
        log.debug("Base Payload: " + payload);
        
        if (isSigned()) {
            payload = InstagramHashUtil.generateSignature(payload);
        }
        log.debug("Final Payload: " + payload);
        
        return new StringEntity(payload);
    }

}
