/*
 * 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.photark.face.services.applications.facebook;

import com.github.mhendred.face4j.exception.FaceClientException;
import com.github.mhendred.face4j.exception.FaceServerException;
import org.apache.photark.face.services.FaceRecognitionService;
import org.apache.photark.face.services.beans.PhotArkFace;
import org.apache.photark.face.services.beans.PhotarkPhoto;
import org.apache.tuscany.sca.data.collection.Entry;
import org.oasisopen.sca.annotation.Reference;
import org.oasisopen.sca.annotation.Scope;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

@Scope("COMPOSITE")
public class FacebookFriendFinderImpl implements FacebookFriendFinder {

    private FaceRecognitionService faceRecognitionService;
    private final String adamFBUserId = "";
    private final String adamAccessToken = "";


    @Reference(name = "faceRecognitionService")
    protected void setFaceRecognitionService(FaceRecognitionService faceRecognitionService) {
        this.faceRecognitionService = faceRecognitionService;
    }

    public Entry<String, String>[] getAllMyFBFriendsFromPictureLocal(String pathToFile) {

        return processFBFriends(pathToFile, true);
    }

    public Entry<String, String>[] getAllMyFBFriendsFromPictureUrl(String fileUrl) {

        return processFBFriends(fileUrl, false);
    }

    public void setFacebookAuth(String facebookId, String fbAccessToken) {
        faceRecognitionService.setFacebookOauth2(facebookId, fbAccessToken);
    }

    private Entry<String, String>[] processFBFriends(String fileLocation, boolean isLocal) {

        PhotarkPhoto photo = null;
        List<Entry<String, String>> detectedFriends = new ArrayList<Entry<String, String>>();

        try {
            faceRecognitionService.setFacebookOauth2(adamFBUserId, adamAccessToken);
            if (isLocal) {
                photo = faceRecognitionService.recognizeFromFile(new File(fileLocation), "friends@facebook.com");
            } else {
                photo = faceRecognitionService.recognizeFromUrls(fileLocation, "friends@facebook.com").get(0);
            }

            for (PhotArkFace face : photo.getPhotArkFaces()) {

                String uid = "";
                String confidence = "";
                if (face.getGuess() != null) {
                    System.out.println("***Identified*** " + face.getGuess().toString());
                    uid = face.getGuess().getGuessID();
                    confidence = face.getGuess().getConfidence();
                    detectedFriends.add(new Entry<String, String>(uid, confidence));
                } else {
                    System.out.println("??? Unidentified ..");
                }
            }

        } catch (FaceClientException e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        } catch (FaceServerException e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        }
        Entry<String, String>[] imageArray = new Entry[detectedFriends.size()];
        return detectedFriends.toArray(imageArray);

    }

}