/**
 * 
 */
package com.ftrd.flickr.service;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;

import javax.imageio.ImageIO;

import org.xml.sax.SAXException;

import com.aetrion.flickr.Flickr;
import com.aetrion.flickr.FlickrException;
import com.aetrion.flickr.REST;
import com.aetrion.flickr.RequestContext;
import com.aetrion.flickr.auth.Auth;
import com.aetrion.flickr.auth.AuthInterface;
import com.aetrion.flickr.auth.Permission;
import com.aetrion.flickr.people.User;
import com.aetrion.flickr.photos.Photo;
import com.aetrion.flickr.photos.Size;
import com.aetrion.flickr.photosets.Photoset;
import com.aetrion.flickr.photosets.Photosets;
import com.aetrion.flickr.photosets.PhotosetsInterface;
import com.aetrion.flickr.uploader.UploadMetaData;
import com.aetrion.flickr.uploader.Uploader;
import com.aetrion.flickr.util.AuthStore;
import com.aetrion.flickr.util.FileAuthStore;
import com.ftrd.Service;

/**
 * This POJO implements the service that delivers photos from <a
 * href="http://www.flickr.com">Flicr</a>. Implementation is based on the <a
 * href="http://www.flickr.com/services/api/">Flickr API</a>, abstracted by the
 * <a href="http://sourceforge.net/projects/flickrj">flickrj</a> library.
 * 
 * @author <a href="mailto:tuyun1984@gmail.com">Daniel Tu</a>
 * @since 2008-10-6
 */

public class FlickrService implements Service {

	private Flickr flickr;

	private REST Rest;
	
	private AuthStore authStore = null;

	/**
	 * Flag set to determine if we have a valid connection to Flickr
	 */
	private boolean Connected = false;

	public FlickrService(){
		// Connect to flickr
		try {
			Connect();
		} catch (Exception ex) {
			System.out.println("Can not connect to flickr!");
			ex.printStackTrace();
		}

	}

	/**
	 * connect to flickr by flickr_api_key and secret.
	 * operate CONNECT_RETRY times, else connect errot.
	 * 
	 * @throws Exception
	 */
	private void Connect() throws Exception {
		// Try to connect at most 'CONNECT_RETRY' times before throwing an
		// exception
		Exception latestEx = null;
		for (int i = 0; !Connected && i < ConflickrConstants.CONNECT_RETRY; i++){
			try {
				// Initialize
				Rest = new REST();
				Rest.setHost(ConflickrConstants.HOST);
				System.out.println("connecting...........");
				flickr = new Flickr(ConflickrConstants.FLICKR_API_KEY,
						ConflickrConstants.FLICKR_SECRET, Rest);
				System.out.println("print the flickr obj: " + flickr.getApiKey() + ", " 
						+ flickr.getSharedSecret() + ", " + flickr.toString());
				Connected = true;
			} catch (Exception ex) {
				latestEx = ex;
			}
		}
		System.out.println("Connected...............");
		if (!Connected)
			throw latestEx;
	}

	public static void main(String args[]){
		System.out.println("New Flickrservice.................");
		FlickrService fs = new FlickrService();
		
		try {
			User user = fs.flickr.getPeopleInterface().findByEmail(ConflickrConstants.DEFAULT_USERNAME);
			System.out.println("### " + user.getId());
			fs.getTotalPhotosCount(ConflickrConstants.USERID);
			fs.downloadPhoto("2921340940");
			System.out.println("Downloaded.................");
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
	}
	/**
	 * authorize whether user has the permission to write, used in upload.
	 * 
	 * @throws IOException
	 * @throws SAXException
	 * @throws FlickrException
	 */
	private void authorize() throws IOException, SAXException, FlickrException {
		
		AuthInterface authInterface = flickr.getAuthInterface();
		String frob = "";
		try {
			frob = authInterface.getFrob();
		} catch (FlickrException e) {
			e.printStackTrace();
		}
		System.out.println("frob: " + frob);
		
		// grant the write permission by user at the first time
		URL authUrl = this.flickr.getAuthInterface().buildAuthenticationUrl( Permission.READ, frob);
		System.out.println("Please visit: " + authUrl.toExternalForm() + " then, hit enter.");
		System.in.read();
		try {
			Auth auth = authInterface.getToken(frob);
			RequestContext.getRequestContext().setAuth(auth);
			// store the auth permission to local
			this.authStore.store(auth);

			System.out.println("Authentication success");
			
			// This token can be used until the user revokes it.
			System.out.println("Token: " + auth.getToken());
			System.out.println("nsid: " + auth.getUser().getId());
			System.out.println("Realname: " + auth.getUser().getRealName());
			System.out.println("Username: " + auth.getUser().getUsername());
			System.out.println("Permission: " + auth.getPermission());
		} catch (FlickrException e) {
			System.out.println("Authentication failed");
			e.printStackTrace();
		}
	}

	/**
	 * get total photo count by userid
	 * 
	 * @param userId
	 * @return
	 * @throws Exception
	 */
	public int getTotalPhotosCount(String userId) throws Exception {
		int count = 0;
		try {
			User user = flickr.getPeopleInterface().getInfo(userId);
			System.out.println("username: " + user.getUsername());
			System.out.println("userID: " + user.getId());
			count = user.getPhotosCount();
		} catch (Exception e) {
			System.out.println("The flickr email is wrong!");
			e.printStackTrace();
		}
		return count;
	}

	/**
	 * list all photosets by userid
	 * 
	 * @param userid
	 */
	public void listUsersPhotosets(String userid) {
		PhotosetsInterface setiface = flickr.getPhotosetsInterface();

		try {
			Photosets photosets = setiface.getList(userid);
			Collection sets = photosets.getPhotosets();
			Iterator it = sets.iterator();
			while (it.hasNext()) {
				Photoset pset = (Photoset) it.next();

				System.out.print(pset.getId() + " - ");
				System.out.println(pset.getTitle());
			}
		} catch (IOException ex) {
			ex.printStackTrace();
		} catch (FlickrException ex) {
			ex.printStackTrace();
		} catch (SAXException ex) {
			ex.printStackTrace();
		}

	}

	public void addAlbum(String album_id) {
		// TODO Auto-generated method stub

	}

	/* (non-Javadoc)
	 * @see com.ftrd.Service#uploadPhoto(java.lang.String, java.lang.String)
	 */
	public void uploadPhoto(String album_id, String filename) throws Exception {

		FileInputStream photo = null;

		try {
			photo = new FileInputStream(filename);
		} catch (FileNotFoundException e1) {
			e1.printStackTrace();
		}

		try {
			RequestContext rc = RequestContext.getRequestContext();
			// Check if local exist the auth file
			this.authStore = new FileAuthStore(new File("D:\\flickrtest\\"));
			
			if (this.authStore != null) {
				Auth auth = this.authStore.retrieve(ConflickrConstants.USERID);
				if (auth == null) 
					this.authorize();
				else 
					rc.setAuth(auth);
			}
			
			Uploader flickrUploader = new Uploader(flickr.getApiKey(), flickr
					.getSharedSecret());
			String photo_Id = flickrUploader
					.upload(photo, new UploadMetaData());
			flickr.getPhotosetsInterface().addPhoto(album_id, photo_Id);
		} catch (IOException e) {
			System.out.println("check the filename.");
			e.printStackTrace();
		} catch (FlickrException e) {
			System.out.println("upload photo to flickr error.");
			e.printStackTrace();
		} catch (SAXException e) {
			System.out.println("can not get photo_id of the photo uploaded.");
			e.printStackTrace();
		}

	}

	/* (non-Javadoc)
	 * @see com.ftrd.Service#addTags(java.lang.String, java.lang.String)
	 */
	public void addTags(String photo_id, String tag) throws Exception {
		// split the tag by breakspace
		String[] tags = tag.split(" ");
		try {
			flickr.getPhotosInterface().addTags(photo_id, tags);
		} catch (IOException e) {
			System.out.println("check the tag.");
			e.printStackTrace();
		} catch (FlickrException e) {
			System.out.println("add tag to photo error.");
			e.printStackTrace();
		} catch (SAXException e) {
			System.out.println("can not add tag to photo.");
			e.printStackTrace();
		}
	}

	public void connect(String username, String password, String apiKey)
			throws Exception {
		// Try to connect at most 'CONNECT_RETRY' times before throwing an
		// exception
		Exception latestEx = null;
		for (int i = 0; !Connected && i < ConflickrConstants.CONNECT_RETRY; i++)
			try {
				// Initialize
				Rest = new REST();
				Rest.setHost(ConflickrConstants.HOST);
				flickr = new Flickr(apiKey);

				Connected = true;
			} catch (Exception ex) {
				latestEx = ex;
			}
		if (!Connected)
			throw latestEx;

	}

	public void deleteAlbum(String album_id) throws Exception {
		try {
			flickr.getPhotosetsInterface().delete(album_id);
		} catch (IOException e) {
			System.out.println("check the album_id.");
			e.printStackTrace();
		} catch (FlickrException e) {
			System.out.println("delete photoset error.");
			e.printStackTrace();
		} catch (SAXException e) {
			System.out.println("can not delete photoset.");
			e.printStackTrace();
		}
	}

	public void deletePhoto(String album_id, String photo_id) {
		try {
			flickr.getPhotosInterface().delete(photo_id);
		} catch (IOException e) {
			System.out.println("check the photo_id.");
			e.printStackTrace();
		} catch (FlickrException e) {
			System.out.println("delete photo error.");
			e.printStackTrace();
		} catch (SAXException e) {
			System.out.println("can not delete photo.");
			e.printStackTrace();
		}
	}

	public void download(String album_id, String photo_id) {
		// TODO Auto-generated method stub

	}

	public int downloadAlbum(String album_id) {
		// TODO Auto-generated method stub
		return 0;
	}

	public void downloadContentsInAlbum(String album_id) {
		// TODO Auto-generated method stub

	}

	public Object getAlbum(String album_id) throws Exception {
		PhotosetsInterface photosetsInter = flickr.getPhotosetsInterface();
		Photoset photoset = photosetsInter.getInfo(album_id);
		// TODO Auto-generated method stub
		return photoset;
	}

	public List getAlbumTags(String album_id) {
		// TODO Auto-generated method stub
		return null;
	}

	public Object getPhoto(String album_id, String photo_id) throws Exception {
		Photo photo = null;
		try {
			photo = flickr.getPhotosInterface().getPhoto(photo_id);
		} catch (IOException e) {
			System.out.println("check the photo_id.");
			e.printStackTrace();
		} catch (FlickrException e) {
			System.out.println("get photo error.");
			e.printStackTrace();
		} catch (SAXException e) {
			System.out.println("can not get photo.");
			e.printStackTrace();
		}
		return photo;
	}

	public List getPhotoComments(String photo_id) {
		List<String> comments = new ArrayList<String>();
		try {
			comments = (ArrayList<String>)flickr.getPhotosetsCommentsInterface().getList(photo_id);
		} catch (IOException e) {
			System.out.println("check the photo_id.");
			e.printStackTrace();
		} catch (FlickrException e) {
			System.out.println("get photo comments error.");
			e.printStackTrace();
		} catch (SAXException e) {
			System.out.println("can not get photo comments.");
			e.printStackTrace();
		}
		return comments;
	}

	public List getPhotoTags(String photo_id) {
		Photo photo = null;
		List<String> tags = new ArrayList<String>();
		try {
			photo = flickr.getPhotosInterface().getPhoto(photo_id);
			tags = (ArrayList<String>)photo.getTags();
		} catch (IOException e) {
			System.out.println("check the photo_id.");
			e.printStackTrace();
		} catch (FlickrException e) {
			System.out.println("get photo tags error.");
			e.printStackTrace();
		} catch (SAXException e) {
			System.out.println("can not get photo tags.");
			e.printStackTrace();
		}
		return tags;
	}

	/* (non-Javadoc)
	 * @see com.ftrd.Service#getPhotots(java.lang.String)
	 */
	public List getPhotots(String album_id) throws Exception {
		List<Photo> photosList = new ArrayList<Photo>();

		PhotosetsInterface setsInterface = flickr.getPhotosetsInterface();

		try {
			Collection photos = setsInterface.getPhotos(album_id, 0, 0);
			Iterator it = photos.iterator();
			while (it.hasNext()) {
				Photo photo = (Photo) it.next();
				photosList.add(photo);
			}
		} catch (IOException ex) {
			ex.printStackTrace();
		} catch (FlickrException ex) {
			ex.printStackTrace();
		} catch (SAXException ex) {
			ex.printStackTrace();
		}

		return photosList;
	}

	public void modifyAlbum(String album_id) {
		// TODO Auto-generated method stub

	}

	public void removeTags(String photo_id, String tag) throws Exception {
		// TODO Auto-generated method stub
	}

	/* (non-Javadoc)
	 * @see com.ftrd.Service#saveToFile(java.lang.Object, java.lang.String)
	 */
	public void saveToFile(Object object, String author) {
		// TODO Auto-generated method stub
		Photo photo = (Photo) object;
		String title = photo.getTitle();
		try {
			BufferedImage bufImage = flickr.getPhotosInterface().getImage(
					photo, Size.MEDIUM);
			ImageIO.write(bufImage, "jpg", new File("D:\\flickrtest\\" + title
					+ ".jpg"));
		} catch (IOException ioe) {
			// TODO: handle exception
		} catch (FlickrException fce) {
			// TODO: handle exception
		}

	}

	/**
	 * download the plickr photo and save it to local
	 * 
	 * @param photo_id
	 * @throws Exception
	 */
	public void downloadPhoto(String photo_id) throws Exception {
		Photo photo = flickr.getPhotosInterface().getPhoto(photo_id);
		saveToFile(photo, "");
		
		System.out.println("download successful!");
		
	}

}