/*
 * Copyright (c) 2017. Developed by Hedgecode.
 *
 * 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.hedgecode.snooker.request;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;

/**
 * Abstract Data Requester from the portal api.snooker.org.
 *
 * @author Dmitry Samoshin aka gotty
 */
public abstract class AbstractRequester implements Requester {

    protected static final String API_SNOOKER_URL = "http://api.snooker.org/";
    protected static final Charset API_SNOOKER_CHARSET = StandardCharsets.UTF_8;

    protected abstract String getRequestUrl(int id) throws RequestException;

    protected abstract String getRequestUrl(RequestParams params) throws RequestException;

    @Override
    public String request(int id) throws RequestException {
        return _request(
                getRequestUrl(id)
        );
    }

    @Override
    public String request(RequestParams params) throws RequestException {
        return _request(
                getRequestUrl(params)
        );
    }

    private String _request(String requestUrl) throws RequestException {
        StringBuilder result = new StringBuilder();
        try {
            URL url = new URL(requestUrl);
            URLConnection urlConnection = url.openConnection();
            BufferedReader br = new BufferedReader(
                    new InputStreamReader(
                            urlConnection.getInputStream(), API_SNOOKER_CHARSET
                    )
            );
            String inputLine;
            while ((inputLine = br.readLine()) != null) {
                result.append(inputLine);
            }
            br.close();
        } catch (IOException e) {
            throw new RequestException(requestUrl, e.getMessage());
        }
        return result.toString();
    }

    protected boolean isCorrectId(int id) {
        return id > 0;
    }

}