/*
    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>
*/
pub mod extract;
pub mod fragment;
pub mod remux;
pub mod seek_index;
pub mod segment_extractor;
pub mod trim_writer;

pub use fragment::write_fragment_into;
pub use remux::remux_stream_into;

use jellybase::common::{SourceTrack, SourceTrackKind};
use jellymatroska::{Master, MatroskaTag};

pub fn ebml_header(webm: bool) -> MatroskaTag {
    MatroskaTag::Ebml(Master::Collected(vec![
        MatroskaTag::EbmlVersion(1),
        MatroskaTag::EbmlReadVersion(1),
        MatroskaTag::EbmlMaxIdLength(4),
        MatroskaTag::EbmlMaxSizeLength(8),
        MatroskaTag::DocType(if webm {
            "webm".to_string()
        } else {
            "matroska".to_string()
        }),
        MatroskaTag::DocTypeVersion(4),
        MatroskaTag::DocTypeReadVersion(2),
    ]))
}
pub fn ebml_segment_info(title: String, duration: f64) -> MatroskaTag {
    MatroskaTag::Info(Master::Collected(vec![
        MatroskaTag::TimestampScale(1_000_000),
        MatroskaTag::Duration(duration * 1000.0),
        MatroskaTag::Title(title),
        MatroskaTag::MuxingApp("jellyremux".to_string()),
        MatroskaTag::WritingApp("jellything".to_string()),
    ]))
}

pub fn ebml_track_entry(
    number: u64,
    uid: u64,
    track: &SourceTrack,
    codec_private: Option<Vec<u8>>,
) -> MatroskaTag {
    let mut els = vec![
        MatroskaTag::TrackNumber(number),
        MatroskaTag::TrackUID(uid),
        MatroskaTag::FlagLacing(track.flag_lacing),
        MatroskaTag::Language(track.language.clone()),
        MatroskaTag::CodecID(track.codec.clone()),
        MatroskaTag::CodecDelay(track.codec_delay),
        MatroskaTag::SeekPreRoll(track.seek_pre_roll),
    ];
    if let Some(d) = &track.default_duration {
        els.push(MatroskaTag::DefaultDuration(*d));
    }
    match track.kind {
        SourceTrackKind::Video {
            width,
            height,
            display_height,
            display_width,
            display_unit,
            fps,
        } => {
            els.push(MatroskaTag::TrackType(1));
            let mut props = vec![
                MatroskaTag::PixelWidth(width),
                MatroskaTag::PixelHeight(height),
            ];
            props.push(MatroskaTag::DisplayWidth(display_width.unwrap_or(width)));
            props.push(MatroskaTag::DisplayHeight(display_height.unwrap_or(height)));
            props.push(MatroskaTag::DisplayUnit(display_unit));
            if let Some(fps) = fps {
                props.push(MatroskaTag::FrameRate(fps))
            }
            els.push(MatroskaTag::Video(Master::Collected(props)))
        }
        SourceTrackKind::Audio {
            channels,
            sample_rate,
            bit_depth,
        } => {
            els.push(MatroskaTag::TrackType(2));
            let mut props = vec![
                MatroskaTag::SamplingFrequency(sample_rate),
                MatroskaTag::Channels(channels.try_into().unwrap()),
            ];
            if let Some(bit_depth) = bit_depth {
                props.push(MatroskaTag::BitDepth(bit_depth.try_into().unwrap()));
            }
            els.push(MatroskaTag::Audio(Master::Collected(props)));
        }
        SourceTrackKind::Subtitles => {
            els.push(MatroskaTag::TrackType(17));
        }
    }
    if let Some(d) = &codec_private {
        els.push(MatroskaTag::CodecPrivate(d.clone()));
    }
    MatroskaTag::TrackEntry(Master::Collected(els))
}