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use fj_math::Vector;

use crate::{
    objects::{Face, Region, Shell},
    operations::{
        insert::Insert,
        reverse::Reverse,
        sweep::{SweepCache, SweepRegion},
        update::UpdateShell,
    },
    services::Services,
    storage::Handle,
};

/// # Sweep a [`Face`] that is part of a [`Shell`]
///
/// See [module documentation] for more information.
///
/// [module documentation]: super
pub trait SweepFaceOfShell {
    /// # Sweep the [`Face`] of the [`Shell`]
    ///
    /// Extends the shell, adding the new faces to it.
    ///
    /// # Panics
    ///
    /// Panics, if the face has interior cycles. This is not a fundamental
    /// limitation, but none the less not yet supported.
    fn sweep_face_of_shell(
        &self,
        face: Handle<Face>,
        path: impl Into<Vector<3>>,
        services: &mut Services,
    ) -> Self;
}

impl SweepFaceOfShell for Shell {
    fn sweep_face_of_shell(
        &self,
        face: Handle<Face>,
        path: impl Into<Vector<3>>,
        services: &mut Services,
    ) -> Self {
        let path = path.into();

        if !face.region().interiors().is_empty() {
            todo!(
                "Sweeping shell faces with interior cycles is not yet \
                supported."
            )
        }

        let mut cache = SweepCache::default();

        let exterior =
            face.region().exterior().reverse(services).insert(services);
        let region = Region::new(exterior, [], face.region().color());
        let faces = region
            .sweep_region(face.surface(), path, &mut cache, services)
            .all_faces()
            .map(|face| face.insert(services));

        self.remove_face(&face).add_faces(faces)
    }
}