import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

/**
 * @author couedrao on 27/11/2019.
 * @project gctrl
 */
class SDNCtrlAPI {

    String redirect_traffic(String olddestip, String newdestip) throws ClientProtocolException, IOException{
        String status = "OK";
        Main.logger(this.getClass().getSimpleName(), "olddestip = " + olddestip + "; newdestip = " + newdestip);
        
        CloseableHttpClient httpclient = HttpClients.createDefault();
		HttpPut httpPut = new HttpPut("http://127.0.0.1:5001/restapi/compute/dc1/");
        httpPut.setHeader("Accept", "application/json");
        httpPut.setHeader("Content-type", "application/json");//vnfinfos.get("image")
        String inputJson = "{\n" +
                "  \"image\": \"+gateway:topo+\",\n" +
                "  \"network\": \"(id=input,ip=10.2.2.2/8)\"\n" +
                "}";
        StringEntity stringEntity = new StringEntity(inputJson);
        httpPut.setEntity(stringEntity);
        HttpResponse response = httpclient.execute(httpPut);
        BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent())));
        if (response.getStatusLine().getStatusCode() != 200) {
            throw new RuntimeException("Failed : HTTP error code : " + response.getStatusLine().getStatusCode());
        }
        StringBuffer result = new StringBuffer();
        String line = "";
        while ((line = br.readLine()) != null) {
            System.out.println("Response : \n" + result.append(line));
        }

        return status;
    }

    String insert_a_loadbalancer(String oldgwip, String lbip, List<String> newgwsip) {
        String status = "OK";
        Main.logger(this.getClass().getSimpleName(), "oldgwip = " + oldgwip + "; lbip = " + lbip + "; newgwsip = " + newgwsip);
        //TODO

        return status;
    }

    String remove_less_important_traffic(String importantsrcip) {
        String status = "OK";
        Main.logger(this.getClass().getSimpleName(), "importantsrcip = " + importantsrcip);
        //TODO

        return status;
    }


}