use anyhow::{anyhow, Result};
use crate::domain::entities::Project;
use crate::domain::value_objects::{TrackId, TrackLanguage};

/// Altera o idioma de uma faixa externa pelo TrackId.
#[allow(dead_code)]
pub struct SetTrackLanguage;

impl SetTrackLanguage {
    #[allow(dead_code)]
    pub fn execute(project: &mut Project, id: TrackId, language: TrackLanguage) -> Result<()> {
        let track = project
            .find_track_mut(id)
            .ok_or_else(|| anyhow!("Faixa não encontrada: {:?}", id))?;
        track.set_language(language);
        Ok(())
    }
}

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

    #[test]
    fn altera_idioma_da_faixa() {
        let mut project = Project::new(
            VideoFile::new(FilePath::from("input.mkv")),
            MkvOutput::new(FilePath::from("output.mkv")),
        )
        .unwrap();
        AddAudioTrack::execute(
            &mut project,
            FilePath::from("audio.aac"),
            SyncOffset::default(),
            TrackLanguage::new("por").unwrap(),
            false,
            String::new(),
            1.0,
        )
        .unwrap();
        let id = project.tracks[0].id();

        SetTrackLanguage::execute(&mut project, id, TrackLanguage::new("eng").unwrap()).unwrap();
        assert_eq!(project.tracks[0].language().as_str(), "eng");
    }
}