/*
 * Copyright � 2016 TIBCO Software,Inc.All rights reserved.
 * http://community.jaspersoft.com/project/jaspermobile-android
 *
 * Unless you have purchased a commercial license agreement from TIBCO Jaspersoft,
 * the following license terms apply:
 *
 * This program is part of TIBCO Jaspersoft Mobile for Android.
 *
 * TIBCO Jaspersoft Mobile is free software:you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation,either version 3of the License,or
 * (at your option)any later version.
 *
 * TIBCO Jaspersoft Mobile is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY;without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with TIBCO Jaspersoft Mobile for Android.If not,see
 * <http://www.gnu.org/licenses/lgpl>.
 */

package com.jaspersoft.android.jaspermobile.domain.interactor.resource;

import com.jaspersoft.android.jaspermobile.domain.ScreenCapture;
import com.jaspersoft.android.jaspermobile.domain.executor.PostExecutionThread;
import com.jaspersoft.android.jaspermobile.domain.executor.PreExecutionThread;
import com.jaspersoft.android.jaspermobile.domain.interactor.AbstractUseCase;
import com.jaspersoft.android.jaspermobile.domain.repository.FilesRepository;
import com.jaspersoft.android.jaspermobile.internal.di.PerProfile;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import javax.inject.Inject;

import rx.Observable;
import rx.Subscriber;

/**
 * @author Andrew Tivodar
 * @since 2.3
 */
@PerProfile
public class SaveScreenCaptureCase extends AbstractUseCase<File, ScreenCapture> {
    private static final String FILE_DATE_FORMAT = "yyyy-MM-dd hh:mm:ss";
    private static final String SCREEN_CAPTURE_NAME = "JasperMobile shared resource ";
    private static final String SCREEN_CAPTURE_FORMAT = ".jpg";
    private static final String SCREEN_CAPTURE_SHARED_DIR = "shared_cache";

    private final FilesRepository mFilesRepository;
    private final SimpleDateFormat mSimpleDateFormat;

    @Inject
    protected SaveScreenCaptureCase(PreExecutionThread preExecutionThread, PostExecutionThread postExecutionThread, FilesRepository filesRepository) {
        super(preExecutionThread, postExecutionThread);
        mFilesRepository = filesRepository;
        mSimpleDateFormat = new SimpleDateFormat(FILE_DATE_FORMAT, Locale.getDefault());
    }

    @Override
    protected Observable<File> buildUseCaseObservable(final ScreenCapture screenCapture) {
        return Observable.create(new Observable.OnSubscribe<File>() {
            @Override
            public void call(Subscriber<? super File> subscriber) {
                try {
                    String currentDate = mSimpleDateFormat.format(new Date());
                    File file = mFilesRepository.cacheFile(SCREEN_CAPTURE_NAME + currentDate + SCREEN_CAPTURE_FORMAT, SCREEN_CAPTURE_SHARED_DIR);
                    FileOutputStream fileOutputStream = new FileOutputStream(file);
                    boolean saved = screenCapture.saveInto(fileOutputStream);
                    if (saved) {
                        subscriber.onNext(file);
                        subscriber.onCompleted();
                    } else {
                        subscriber.onError(new IOException("Can not create file."));
                    }
                } catch (IOException exc) {
                    subscriber.onError(new IOException("Can not cache file."));
                }
            }
        });
    }
}