import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.util.store.FileDataStoreFactory;
import com.google.api.services.drive.Drive;
import com.google.api.services.drive.DriveScopes;
import com.google.api.services.drive.model.File;
import com.google.api.services.drive.model.FileList;
import com.google.api.services.drive.model.Permission;
import com.google.api.services.drive.model.PermissionList;
import com.google.common.io.Resources;

import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.List;

public class Quickstart {
    /**
     * Application name.
     */
    private static final String APPLICATION_NAME =
            "Drive API Java Quickstart";

    /**
     * Directory to store user credentials for this application.
     */
    private static final java.io.File DATA_STORE_DIR = new java.io.File(
            System.getProperty("user.home"), ".credentials/drive-java-quickstart");

    /**
     * Global instance of the {@link FileDataStoreFactory}.
     */
    private static FileDataStoreFactory DATA_STORE_FACTORY;

    /**
     * Global instance of the JSON factory.
     */
    private static final JsonFactory JSON_FACTORY =
            JacksonFactory.getDefaultInstance();

    /**
     * Global instance of the HTTP transport.
     */
    private static HttpTransport HTTP_TRANSPORT;

    /**
     * Global instance of the scopes required by this quickstart.
     * <p>
     * If modifying these scopes, delete your previously saved credentials
     * at ~/.credentials/drive-java-quickstart
     */
    private static final List<String> SCOPES =
            Arrays.asList(DriveScopes.DRIVE_FILE);

    static {
        try {
            HTTP_TRANSPORT = GoogleNetHttpTransport.newTrustedTransport();
            DATA_STORE_FACTORY = new FileDataStoreFactory(DATA_STORE_DIR);
        } catch (Throwable t) {
            t.printStackTrace();
            System.exit(1);
        }
    }

    /**
     * Creates an authorized Credential object.
     *
     * @return an authorized Credential object.
     * @throws IOException
     */
    private static Credential authorize() throws IOException {
        // Build flow and trigger user authorization request.
        try (InputStream inputStream = Resources.getResource("sa-key-file.json").openStream()) {
            return GoogleCredential.fromStream(inputStream).createScoped(SCOPES);
        }
    }

    /**
     * Build and return an authorized Drive client service.
     *
     * @return an authorized Drive client service
     * @throws IOException
     */
    private static Drive getDriveService() throws IOException {
        Credential credential = authorize();
        return new Drive.Builder(
                HTTP_TRANSPORT, JSON_FACTORY, credential)
                .setApplicationName(APPLICATION_NAME)
                .build();
    }

    public static void main(String[] args) throws IOException {
        // Build a new authorized API client service.
        Drive service = getDriveService();


        //service.files().create(new File().setName("Hello_empt").setMimeType("application/pdf")).execute();

        Permission execute = service.permissions()
                .create("1gDCeEBQhQS_omfYA49sRlxtKoPlSn0PV", new Permission()
                        .setType("user")
                        .setEmailAddress("aodocs.storage.1@dev.revevolcloud.com")
                        //.setDomain("dev.revevolcloud.com")
                        .setRole("writer"))
                .setFields("*")
                .execute();

        System.out.println("Added permission: " + execute);

        PermissionList permissionList = service.permissions().list("1gDCeEBQhQS_omfYA49sRlxtKoPlSn0PV").execute();

        permissionList.getPermissions().forEach(permission -> System.out.println(permission));

        // Print the names and IDs for up to 10 files.
        FileList result = service.files().list()
                .setPageSize(10)
                .setFields("nextPageToken, files(id, name)")
                .execute();
        List<File> files = result.getFiles();
        if (files == null || files.size() == 0) {
            System.out.println("No files found.");
        } else {
            System.out.println("Files:");
            for (File file : files) {
                System.out.printf("%s (%s)\n", file.getName(), file.getId());
            }
        }
    }

}