// SPDX-FileCopyrightText: 2026 Milovann Yanatchkov
// SPDX-License-Identifier: MIT

use crate::Entity;

/// A building — a named gathering of storeys. A container: no mesh of its
/// own; the storeys (and their members) carry the geometry.
#[derive(Debug, Clone)]
pub struct Building {
    name: String,
    storeys: Vec<Entity>,
}

impl Building {
    pub fn new(name: String, storeys: Vec<Entity>) -> Self {
        Self { name, storeys }
    }

    /// The building name.
    pub fn name(&self) -> &str {
        &self.name
    }

    /// The gathered storeys, bottom-up.
    pub fn storeys(&self) -> &[Entity] {
        &self.storeys
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::element::architecture::Storey;
    use crate::geometry::Point;

    #[test]
    fn a_building_gathers_storeys() {
        let l0 = Storey::new(0.0, vec![Entity::Point(Point::new(0.0, 0.0, 0.0))]);
        let l1 = Storey::new(3000.0, vec![Entity::Point(Point::new(0.0, 0.0, 3000.0))]);
        let b = Building::new(
            "b03".to_string(),
            vec![Entity::Storey(l0), Entity::Storey(l1)],
        );
        assert_eq!(b.name(), "b03");
        assert_eq!(b.storeys().len(), 2);
        assert!(matches!(b.storeys()[0], Entity::Storey(_)));
    }
}