//   ▄████████▄      +        ███ +  ▄█████████ ███     +
//  ███▀    ▀███ +         +  ███    ███▀  +    ███ +       +
//  ███  +   ███ ███   ███ █████████ ███        ███  ███   ███
//  ███     +███ ███   ███    ███    ███▐██████ ███  ███   ███
//  ███ +    ███ ███+  ███   +███    ███     +  ███  ███ + ███
//  ███▄    ▄███ ███▄  ███    ███ +  ███  +     ███  ███▄  ███
//   ▀████████▀ + ▀███████    ███▄   ███▄       ▀████ ▀███████
//       +                  +                +             ███
//  +   ▀████████████████████████████████████████████████████▀
//
// This module manages asset loading.

use bevy::ecs::system::EntityCommands;
use bevy::render::render_resource::{AsBindGroup, ShaderRef};
use bevy::pbr::{ExtendedMaterial, MaterialExtension, OpaqueRendererMethod};
use bevy::prelude::*;

pub struct LoadPlugin;
impl Plugin for LoadPlugin {
    fn build(&self, app: &mut App) {
        app.add_plugins(MaterialPlugin::<JupitersRing>::default());
        app.add_plugins(MaterialPlugin::<SkyBox>::default());
        app.add_plugins(MaterialPlugin::<ExtendedMaterial<StandardMaterial, AsteroidSurface, >>::default());
    }
}

pub fn asset_name_to_path(name: &str) -> &'static str {
    match name {
        "suitv2" => "models/suit_v2/suit_v2.glb#Scene0",
        "suit_ar_chefhat" => "models/suit_v2/ar_chefhat.glb#Scene0",
        "asteroid1" => "models/asteroid.glb#Scene0",
        "asteroid2" => "models/asteroid2.glb#Scene0",
        "asteroid_lum" => "models/asteroid_lum.glb#Scene0",
        "hollow_asteroid" => "models/hollow_asteroid.glb#Scene0",
        "moonlet" => "models/moonlet.glb#Scene0",
        "monolith" => "models/monolith_neon.glb#Scene0",
        "lightorb" => "models/lightorb.glb#Scene0",
        "orb_busstop" => "models/orb_busstop.glb#Scene0",
        "orb_busstop_dim" => "models/orb_busstop_dim.glb#Scene0",
        "crate" => "models/crate.glb#Scene0",
        "MeteorAceGT" => "models/MeteorAceGT.glb#Scene0",
        "cruiser" => "models/cruiser.glb#Scene0",
        "satellite" => "models/satellite.glb#Scene0",
        "pizzeria" => "models/pizzeria2.glb#Scene0",
        "pizzasign" => "models/pizzasign.glb#Scene0",
        "selectagon" => "models/selectagon.glb#Scene0",
        "orbitring" => "models/orbitring.glb#Scene0",
        "clippy" => "models/clippy/clippy.glb#Scene0",
        "clippy_ar" => "models/clippy/ar_happy.glb#Scene0",
        "whale" => "models/whale.glb#Scene0",
        "marker_satellites" => "models/marker_satellites.glb#Scene0",
        "marker_planets" => "models/marker_planets.glb#Scene0",
        "point_of_interest" => "models/point_of_interest.glb#Scene0",
        _ => "models/error.glb#Scene0",
    }
}

pub fn load_asset(
    name: &str,
    entity_commands: &mut EntityCommands,
    asset_server: &AssetServer,
) {
    entity_commands.insert(load_scene_by_path(asset_name_to_path(name), asset_server));
}

#[inline]
pub fn load_scene_by_path(
    path: &str,
    asset_server: &AssetServer
) -> Handle<Scene> {
    let path_string = path.to_string();
    if let Some(handle) = asset_server.get_handle(&path_string) {
        handle
    } else {
        asset_server.load(&path_string)
    }
}

// Jupiter's Ring
#[derive(Asset, TypePath, AsBindGroup, Debug, Clone)]
pub struct JupitersRing {
    pub alpha_mode: AlphaMode,
    #[uniform(0)]
    pub ring_radius: f32,
    #[uniform(1)]
    pub jupiter_radius: f32,
}

impl Material for JupitersRing {
    fn fragment_shader() -> ShaderRef {
        "shaders/jupiters_rings.wgsl".into()
    }
    fn alpha_mode(&self) -> AlphaMode {
        self.alpha_mode
    }
}

// Sky Box
#[derive(Asset, TypePath, AsBindGroup, Debug, Clone)]
pub struct SkyBox {}
impl Material for SkyBox {
    fn fragment_shader() -> ShaderRef {
        "shaders/skybox.wgsl".into()
    }
}

// Asteroid Surface
#[derive(Asset, Reflect, AsBindGroup, Debug, Clone)]
pub struct AsteroidSurface {
    #[uniform(100)]
    quantize_steps: u32
}

impl MaterialExtension for AsteroidSurface {
    fn fragment_shader() -> ShaderRef {
        "shaders/material_asteroid.wgsl".into()
    }
    fn deferred_fragment_shader() -> ShaderRef {
        "shaders/material_asteroid.wgsl".into()
    }
}

impl AsteroidSurface {
    pub fn material() -> ExtendedMaterial<StandardMaterial, AsteroidSurface> {
        ExtendedMaterial {
            base: StandardMaterial {
                base_color: Color::rgb(0.29, 0.255, 0.208),
                perceptual_roughness: 1.0,
                opaque_render_method: OpaqueRendererMethod::Auto,
                ..default()
            },
            extension: Self::default(),
        }
    }
}
impl Default for AsteroidSurface {
    fn default() -> Self {
        Self {
            quantize_steps: 3,
        }
    }
}