use bevy::prelude::*;

/// All tunable black-hole parameters. Edited by the egui panel (Task 17),
/// mirrored into BlackHoleUniforms each frame (Task 7).
#[derive(Resource, Clone)]
pub struct BlackHoleParams {
    // Physics (natural units, Rs = 1)
    pub rs: f32,
    // Accretion disk
    pub disk_inner: f32,
    pub disk_outer: f32,
    pub disk_tilt: f32,        // radians, tilt of disk plane vs. camera
    pub disk_brightness: f32,
    pub disk_rotation_speed: f32,
    pub doppler_enabled: bool,
    pub doppler_strength: f32,
    // Renderer
    pub steps: u32,
    pub render_scale: f32,
    pub star_intensity: f32,
    pub grid_enabled: bool,
    pub grid_density: f32,
    // Background
    pub skybox_intensity: f32,
    // Planets (count matches the storage buffer; Task 14)
    pub planet_count: u32,
    // Kerr (Phase 2; unused in Phase 1)
    pub spin: f32,
}

impl Default for BlackHoleParams {
    fn default() -> Self {
        Self {
            rs: 1.0,
            disk_inner: 3.0,
            disk_outer: 15.0,
            disk_tilt: 1.318,      // ~75.5 deg, matching the reference video
            disk_brightness: 1.0,
            disk_rotation_speed: 0.5,
            doppler_enabled: true,
            doppler_strength: 1.0,
            steps: 300,
            render_scale: 1.0,
            star_intensity: 1.0,
            grid_enabled: false,
            grid_density: 1.0,
            skybox_intensity: 0.0, // procedural stars only by default
            planet_count: 0,
            spin: 0.0,
        }
    }
}