package org.schabi.newpipe.services;

/**
 * Created by Christian Schabesberger on 10.08.15.
 *
 * Copyright (C) Christian Schabesberger 2015 <chris.schabesberger@mailbox.org>
 * VideoExtractor.java is part of NewPipe.
 *
 * NewPipe is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * NewPipe 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
 */

import org.schabi.newpipe.VideoInfo;

/**Scrapes information from a video streaming service (eg, YouTube).*/
public abstract class VideoExtractor {
    public String pageUrl;
    public VideoInfo videoInfo;

    public VideoExtractor(String url) {
        this.pageUrl = url;
    }

    /**Fills out the video info fields which are common to all services.
     * Probably needs to be overridden by subclasses*/
    public VideoInfo getVideoInfo()
    {
        if(videoInfo == null) {
            videoInfo = new VideoInfo();
        }

        if(videoInfo.webpage_url.isEmpty()) {
            videoInfo.webpage_url = pageUrl;
        }

        if(videoInfo.title.isEmpty()) {
            videoInfo.title = getTitle();
        }

        if(videoInfo.duration  < 1) {
            videoInfo.duration = getLength();
        }


        if(videoInfo.uploader.isEmpty()) {
            videoInfo.uploader = getUploader();
        }

        if(videoInfo.description.isEmpty()) {
            videoInfo.description = getDescription();
        }

        if(videoInfo.view_count == -1) {
            videoInfo.view_count = getViews();
        }

        if(videoInfo.upload_date.isEmpty()) {
            videoInfo.upload_date = getUploadDate();
        }

        if(videoInfo.thumbnail_url.isEmpty()) {
            videoInfo.thumbnail_url = getThumbnailUrl();
        }

        if(videoInfo.id.isEmpty()) {
            videoInfo.id = getVideoId(pageUrl);
        }

        /** Load and extract audio*/
        if(videoInfo.audioStreams == null) {
            videoInfo.audioStreams = getAudioStreams();
        }
        /** Extract video stream url*/
        if(videoInfo.videoStreams == null) {
            videoInfo.videoStreams = getVideoStreams();
        }

        if(videoInfo.uploader_thumbnail_url.isEmpty()) {
            videoInfo.uploader_thumbnail_url = getUploaderThumbnailUrl();
        }

        if(videoInfo.startPosition < 0) {
            videoInfo.startPosition = getTimeStamp();
        }

        //Bitmap thumbnail = null;
        //Bitmap uploader_thumbnail = null;
        //int videoAvailableStatus = VIDEO_AVAILABLE;
        return videoInfo;
    }

    public abstract String getVideoUrl(String videoId);
    public abstract String getVideoId(String siteUrl);
    public abstract int getTimeStamp();
    public abstract String getTitle();
    public abstract String getDescription();
    public abstract String getUploader();
    public abstract int getLength();
    public abstract int getViews();
    public abstract String getUploadDate();
    public abstract String getThumbnailUrl();
    public abstract String getUploaderThumbnailUrl();
    public abstract VideoInfo.AudioStream[] getAudioStreams();
    public abstract VideoInfo.VideoStream[] getVideoStreams();
}