use anyhow::Result;
use crate::domain::entities::{AudioTrack, Project, Track};
use crate::domain::value_objects::{FilePath, SyncOffset, TrackLanguage};

/// Adiciona uma faixa de áudio externa ao projeto.
pub struct AddAudioTrack;

impl AddAudioTrack {
    pub fn execute(
        project: &mut Project,
        path: FilePath,
        offset: SyncOffset,
        language: TrackLanguage,
    ) -> Result<()> {
        let id = project.next_track_id();
        let track = AudioTrack::new(id, path, offset, language);
        project.tracks.push(Track::Audio(track));
        Ok(())
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::domain::entities::{MkvOutput, VideoFile};
    use crate::domain::value_objects::FilePath;

    #[test]
    fn adiciona_audio_no_projeto() {
        let mut project = Project::new(
            VideoFile::new(FilePath::from("input.mkv")),
            MkvOutput::new(FilePath::from("output.mkv")),
        )
        .unwrap();

        let lang = TrackLanguage::new("por").unwrap();
        AddAudioTrack::execute(
            &mut project,
            FilePath::from("audio_pt.aac"),
            SyncOffset::default(),
            lang,
        )
        .unwrap();

        assert_eq!(project.tracks.len(), 1);
        assert!(matches!(project.tracks[0], Track::Audio(_)));
    }
}