/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.component.google.sheets;

import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.sheets.v4.Sheets;
import org.apache.camel.RuntimeCamelException;

public class BatchGoogleSheetsClientFactory implements GoogleSheetsClientFactory {

    private final NetHttpTransport transport;
    private final JacksonFactory jsonFactory;

    public BatchGoogleSheetsClientFactory() {
        this.transport = new NetHttpTransport();
        this.jsonFactory = new JacksonFactory();
    }

    @Override
    public Sheets makeClient(String clientId, String clientSecret, String applicationName, String refreshToken, String accessToken) {
        if (clientId == null || clientSecret == null) {
            throw new IllegalArgumentException("clientId and clientSecret are required to create Google Sheets client.");
        }
        try {
            Credential credential = authorize(clientId, clientSecret);

            if (refreshToken != null && !"".equals(refreshToken)) {
                credential.setRefreshToken(refreshToken);
            }
            if (accessToken != null && !"".equals(accessToken)) {
                credential.setAccessToken(accessToken);
            }
            return new Sheets.Builder(transport, jsonFactory, credential)
                                .setApplicationName(applicationName)
                                .build();
        } catch (Exception e) {
            throw new RuntimeCamelException("Could not create Google Sheets client.", e);
        }
    }

    // Authorizes the installed application to access user's protected data.
    private Credential authorize(String clientId, String clientSecret) {
        // authorize
        return new GoogleCredential.Builder()
                        .setJsonFactory(jsonFactory)
                        .setTransport(transport)
                        .setClientSecrets(clientId, clientSecret).build();
    }
}
