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package org.schabi.newpipe.extractor.services.xh.extractors;

import com.grack.nanojson.JsonObject;
import com.grack.nanojson.JsonParser;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.schabi.newpipe.extractor.MediaFormat;
import org.schabi.newpipe.extractor.StreamingService;
import org.schabi.newpipe.extractor.downloader.Downloader;
import org.schabi.newpipe.extractor.exceptions.ExtractionException;
import org.schabi.newpipe.extractor.exceptions.ParsingException;
import org.schabi.newpipe.extractor.linkhandler.LinkHandler;
import org.schabi.newpipe.extractor.stream.AudioStream;
import org.schabi.newpipe.extractor.stream.StreamExtractor;
import org.schabi.newpipe.extractor.stream.StreamType;
import org.schabi.newpipe.extractor.stream.VideoStream;

// Parse
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.schabi.newpipe.extractor.services.xh.extractors.items.XhVideo;



public class XhStreamExtractor extends StreamExtractor {
    
    // baseurl
    String baseUrl;
    
    // Object
    XhVideo video;

    public XhStreamExtractor(StreamingService service, LinkHandler linkHandler) throws ParsingException {
        super(service, linkHandler);
        
        // get baseurl using predefined method getBaseUrl()
        // perform regex to replace the url host
        this.baseUrl = getBaseUrl();
        
        // parse video info
        try {
            Document html = Jsoup.connect(this.baseUrl).get();
            
            // Parse Content
            String content = html.selectFirst("#initials-script").html();
            String info_cdn = content.substring(0, content.length() - 1).replace("window.initials=", "");
            
            // Use NanoJSON to convert to VideoItem
            JsonObject json = JsonParser.object().from(info_cdn);
            final JsonObject videoModel = json.getObject("videoModel");
            
            // Video Info
            final int id = videoModel.getInt("id");
            final String title = videoModel.getString("title");
            final String description = videoModel.getString("description");
            final String thumbURL = videoModel.getString("thumbURL");
            final int duration = videoModel.getInt("created");
            final String pageURL = videoModel.getString("pageURL");
            final int created = videoModel.getInt("created");
            // Author 
            final String authorName = videoModel.getObject("author").getString("name");
            final int authorID = videoModel.getObject("author").getInt("id");
            final String authorThumb = videoModel.getObject("author").getString("thumbURL");
            final String authorPageURL = videoModel.getObject("author").getString("pageURL");
            
            
            HashMap<String, String> streams = new HashMap<>();
           
            // iterate urls
            final JsonObject mp4 = videoModel.getObject("sources").getObject("mp4");
            if (!mp4.isEmpty()) {
                final Object keys[] = mp4.keySet().toArray();
                for (int i=0; i < keys.length; i++) {
                    final String key = keys[i].toString();
                    streams.put(key, mp4.getString("key"));
                }
            }
            
            // set the video object
            this.video = new XhVideo(id, title, description, duration, created, pageURL, thumbURL, authorID, authorName, authorThumb, authorPageURL, streams);
        } catch (Exception e) {
            throw new ParsingException(e.getMessage(), e);
        }
        
    }

    @Override
    public String getThumbnailUrl() throws ParsingException {
        return this.video.getThumbURL();
    }

    @Override
    public String getUploaderUrl() throws ParsingException {
        return "";
    }

    @Override
    public String getUploaderName() throws ParsingException {
        return this.video.getAuthorName();
    }

    @Override
    public List<AudioStream> getAudioStreams() throws IOException, ExtractionException {
        // throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
        return Collections.emptyList();
    }

    @Override
    public List<VideoStream> getVideoStreams() throws IOException, ExtractionException {
        // video was not parsed / no video streams
        if (this.video.getSources().isEmpty()) {
            return Collections.emptyList();
        }
        
        // new list
        List<VideoStream> listStreams = new ArrayList<>();
        // iterate hashmap for key values
        for (Map.Entry<String, String> source: this.video.getSources().entrySet()) {
            // add source to list
            listStreams.add(
                    new VideoStream.Builder()
                        .setId(String.valueOf(this.video.getId()))
                        .setContent(source.getValue(), true)
                        .setIsVideoOnly(false)
                        .setMediaFormat(source.getValue().endsWith(".webm")? MediaFormat.WEBM:MediaFormat.MPEG_4)
                        .setResolution(source.getKey())
                        .build()
            );
        }
        // return sources
        return listStreams;
    }

    @Override
    public List<VideoStream> getVideoOnlyStreams() throws IOException, ExtractionException {
        return Collections.emptyList();
    }

    @Override
    public StreamType getStreamType() throws ParsingException {
        return StreamType.VIDEO_STREAM;
    }

    @Override
    public void onFetchPage(Downloader downloader) throws IOException, ExtractionException {
        
    }

    @Override
    public String getName() throws ParsingException {
        return video.getTitle();
    }
    
}