package facade;

/**
 * Complex subsystem classes — these are what the Facade hides.
 * Each class has its own complex API; clients shouldn't need to know all of them.
 */

class VideoFile {
    private final String filename;
    private final String codecType;

    VideoFile(String filename) {
        this(filename, filename.endsWith(".mp4") ? "mpeg4" : "ogg");
    }

    VideoFile(String filename, String codec) {
        this.filename  = filename;
        this.codecType = codec;
        System.out.println("  VideoFile: " + filename + " [codec: " + codecType + "]");
    }

    public String getFilename()  { return filename; }
    public String getCodecType() { return codecType; }
}

interface Codec { String getName(); }

class MPEG4CompressionCodec implements Codec {
    @Override public String getName() { return "mpeg4"; }
}

class OggCompressionCodec implements Codec {
    @Override public String getName() { return "ogg"; }
}

class CodecFactory {
    static Codec extract(VideoFile file) {
        System.out.println("  CodecFactory: extracting codec from " + file.getFilename());
        if ("mpeg4".equals(file.getCodecType())) return new MPEG4CompressionCodec();
        return new OggCompressionCodec();
    }
}

class BitrateReader {
    static VideoFile read(VideoFile file, Codec codec) {
        System.out.println("  BitrateReader: reading " + file.getFilename()
                + " with codec " + codec.getName());
        return new VideoFile(file.getFilename());
    }

    static VideoFile convert(VideoFile buffer, Codec codec) {
        System.out.println("  BitrateReader: converting to " + codec.getName());
        return new VideoFile(buffer.getFilename());
    }
}

class AudioMixer {
    static VideoFile fix(VideoFile result) {
        System.out.println("  AudioMixer: fixing audio tracks");
        return new VideoFile(result.getFilename());
    }
}