/*
    This file is part of jellything (https://codeberg.org/metamuffin/jellything)
    which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
    Copyright (C) 2025 metamuffin <metamuffin.org>
*/

use crate::muxers::FragmentMuxer;
use anyhow::Result;
use std::io::Write;
use winter_ebml::{EbmlHeader, EbmlToVec};
use winter_matroska::{Cluster, Info, MatroskaFile, Segment, Tracks};

fn write_fragment_shared(
    out: &mut dyn Write,
    info: Info,
    tracks: Tracks,
    cluster: Cluster,
    webm: bool,
) -> Result<()> {
    let file = MatroskaFile {
        ebml_header: EbmlHeader {
            ebml_version: 1,
            ebml_read_version: 1,
            ebml_max_id_length: 4,
            ebml_max_size_length: 8,
            doc_type: if webm { "webm" } else { "matroska" }.to_string(),
            doc_type_version: 4,
            doc_type_read_version: 2,
            ..Default::default()
        },
        segment: Segment {
            info,
            tracks: Some(tracks),
            clusters: vec![cluster],
            ..Default::default()
        },
    };
    out.write_all(&file.to_vec())?;
    Ok(())
}

pub struct MatroskaFragmentMuxer;
impl FragmentMuxer for MatroskaFragmentMuxer {
    fn write_fragment(
        out: &mut dyn Write,
        info: Info,
        tracks: Tracks,
        cluster: Cluster,
    ) -> Result<()> {
        write_fragment_shared(out, info, tracks, cluster, false)
    }
}
pub struct WebmFragmentMuxer;
impl FragmentMuxer for WebmFragmentMuxer {
    fn write_fragment(
        out: &mut dyn Write,
        info: Info,
        tracks: Tracks,
        cluster: Cluster,
    ) -> Result<()> {
        write_fragment_shared(out, info, tracks, cluster, true)
    }
}