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

/// Remove uma faixa externa do projeto pelo seu TrackId.
pub struct RemoveTrack;

impl RemoveTrack {
    pub fn execute(project: &mut Project, id: TrackId) -> Result<()> {
        if project.remove_track(id) {
            Ok(())
        } else {
            Err(anyhow!("Faixa com id {:?} não encontrada.", id))
        }
    }
}

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

    fn make_project() -> Project {
        Project::new(
            VideoFile::new(FilePath::from("input.mkv")),
            MkvOutput::new(FilePath::from("output.mkv")),
        )
        .unwrap()
    }

    #[test]
    fn remove_faixa_existente() {
        let mut project = make_project();
        let id = project.next_track_id();
        project.tracks.push(Track::Audio(AudioTrack::new(
            id,
            FilePath::from("audio.aac"),
            SyncOffset::from_ms(0),
            TrackLanguage::new("por").unwrap(),
            false,
            String::new(),
            1.0,
        )));
        assert_eq!(project.tracks.len(), 1);

        RemoveTrack::execute(&mut project, id).unwrap();
        assert!(project.tracks.is_empty());
    }

    #[test]
    fn erro_se_id_inexistente() {
        let mut project = make_project();
        let result = RemoveTrack::execute(&mut project, TrackId::new(99));
        assert!(result.is_err());
    }
}