//   ▄████████▄      +        ███ +  ▄█████████ ███     +
//  ███▀    ▀███ +         +  ███    ███▀  +    ███ +       +
//  ███  +   ███ ███   ███ █████████ ███        ███  ███   ███
//  ███     +███ ███   ███    ███    ███▐██████ ███  ███   ███
//  ███ +    ███ ███+  ███   +███    ███     +  ███  ███ + ███
//  ███▄    ▄███ ███▄  ███    ███ +  ███  +     ███  ███▄  ███
//   ▀████████▀ + ▀███████    ███▄   ███▄       ▀████ ▀███████
//       +                  +                +             ███
//  +   ▀████████████████████████████████████████████████████▀
//
// This module populates the world with actors as defined in "defs.txt"

extern crate regex;
use crate::prelude::*;
use bevy::pbr::{NotShadowCaster, NotShadowReceiver};
use bevy::prelude::*;
use bevy_xpbd_3d::prelude::*;
use regex::Regex;

pub const ID_SPECIAL_PLAYERCAM: &str = "PLAYERCAMERA";
pub const ID_EARTH: &str = "earth";
pub const ID_SOL: &str = "sol";
pub const ID_JUPITER: &str = "jupiter";

pub struct CmdPlugin;
impl Plugin for CmdPlugin {
    fn build(&self, app: &mut App) {
        app.add_systems(Startup, load_defs);
        app.add_systems(
            Update,
            handle_spawn_events
                .before(spawn_entities)
                .before(spawn_scenes),
        );
        app.add_systems(Update, spawn_entities);
        app.add_systems(Update, spawn_scenes.after(spawn_entities));
        app.add_systems(Update, process_mesh);
        app.add_systems(
            PreUpdate,
            hide_colliders.run_if(any_with_component::<NeedsSceneColliderRemoved>),
        );
        app.add_event::<SpawnEvent>();
        app.add_event::<SpawnActorEvent>();
        app.add_event::<SpawnSceneEvent>();
    }
}

#[derive(Component)]
pub struct NeedsSceneColliderRemoved;
#[derive(Event)]
pub struct SpawnEvent(ParserState);
#[derive(Event)]
pub struct SpawnActorEvent(ParserState);
#[derive(Event)]
pub struct SpawnSceneEvent(ParserState);
#[derive(PartialEq, Clone)]
enum DefClass {
    Actor,
    Scene,
    None,
}

#[derive(Clone)]
struct ParserState {
    class: DefClass,

    // Generic fields
    name: Option<String>,
    chat: String,

    // Actor fields
    id: String,
    pos: DVec3,
    relative_to: Option<String>,
    model: Option<String>,
    model_scale: f32,
    rotation: Quat,
    axialtilt: f32,
    velocity: DVec3,
    angular_momentum: DVec3,
    pronoun: Option<String>,
    is_sphere: bool,
    is_player: bool,
    is_lifeform: bool,
    is_alive: bool,
    is_suited: bool,
    is_vehicle: bool,
    is_clickable: bool,
    is_targeted_on_startup: bool,
    is_sun: bool,
    is_moon: bool,
    is_planet: bool,
    is_point_of_interest: bool,
    orbit_distance: Option<f64>,
    orbit_object_id: Option<String>,
    orbit_phase: Option<f64>,
    has_physics: bool,
    has_ring: bool,
    wants_maxrotation: Option<f64>,
    wants_maxvelocity: Option<f64>,
    wants_tolookat_id: Option<String>,
    wants_matchvelocity_id: Option<String>,
    collider_is_mesh: bool,
    collider_is_one_mesh_of_scene: bool,
    thrust_forward: f32,
    thrust_sideways: f32,
    thrust_back: f32,
    reaction_wheels: f32,
    warmup_seconds: f32,
    engine_type: actor::EngineType,
    oxygen: f32,
    density: f64,
    collider: Collider,
    camdistance: f32,
    suit_integrity: f32,
    light_brightness: f32,
    light_color: Option<Color>,
    ar_model: Option<String>,
    show_only_in_map_at_distance: Option<(f64, String)>,
}
impl Default for ParserState {
    fn default() -> Self {
        let default_actor = actor::Actor::default();
        let default_engine = actor::Engine::default();
        Self {
            class: DefClass::None,
            name: None,
            chat: "".to_string(),

            id: "".to_string(),
            pos: DVec3::new(0.0, 0.0, 0.0),
            relative_to: None,
            model: None,
            model_scale: 1.0,
            rotation: Quat::IDENTITY,
            axialtilt: 0.0,
            velocity: DVec3::splat(0.0),
            angular_momentum: DVec3::new(0.03, 0.3, 0.09),
            pronoun: None,
            is_sphere: false,
            is_player: false,
            is_lifeform: false,
            is_alive: false,
            is_suited: false,
            is_vehicle: false,
            is_clickable: true,
            is_targeted_on_startup: false,
            is_sun: false,
            is_moon: false,
            is_planet: false,
            is_point_of_interest: false,
            orbit_distance: None,
            orbit_object_id: None,
            orbit_phase: None,
            has_physics: true,
            has_ring: false,
            wants_maxrotation: None,
            wants_maxvelocity: None,
            wants_tolookat_id: None,
            wants_matchvelocity_id: None,
            collider_is_mesh: false,
            collider_is_one_mesh_of_scene: false,
            thrust_forward: default_engine.thrust_forward,
            thrust_sideways: default_engine.thrust_forward,
            thrust_back: default_engine.thrust_back,
            reaction_wheels: default_engine.reaction_wheels,
            warmup_seconds: default_engine.warmup_seconds,
            engine_type: default_engine.engine_type,
            oxygen: nature::OXY_D,
            density: 100.0,
            collider: Collider::sphere(1.0),
            camdistance: default_actor.camdistance,
            suit_integrity: 1.0,
            light_brightness: 0.0,
            light_color: None,
            ar_model: None,
            show_only_in_map_at_distance: None,
        }
    }
}

pub fn load_defs(mut ew_spawn: EventWriter<SpawnEvent>) {
    let re1 = Regex::new(r"^\s*([a-z_-]+)\s+(.*)$").unwrap();
    let re2 =
        Regex::new("\"([^\"]*)\"|(-?[0-9]+[0-9e-]*(?:\\.[0-9e-]+)?)|([a-zA-Z_-][a-zA-Z0-9_-]*)")
            .unwrap();
    let defs_string = include_str!("data/defs.txt");
    let mut lines = defs_string.lines();
    let mut state = ParserState::default();
    let mut command;
    let mut parameters;

    let mut line_nr = -1;
    while let Some(line) = lines.next() {
        line_nr += 1;
        let caps = re1.captures(line);
        if caps.is_none() {
            if line.trim() != "" {
                error!("Syntax Error in definitions line {}: `{}`", line_nr, line);
            }
            continue;
        }
        if let Some(caps) = caps {
            command = caps.get(1).unwrap().as_str();
            parameters = caps.get(2).unwrap().as_str();
        } else {
            error!(
                "Failed to read regex captures in line {}: `{}`",
                line_nr, line
            );
            continue;
        }

        let mut parts: Vec<&str> = Vec::new();
        parts.push(command);
        for caps in re2.captures_iter(parameters) {
            if let Some(part) = caps.get(1) {
                parts.push(&part.as_str());
            }
            if let Some(part) = caps.get(2) {
                parts.push(&part.as_str());
            }
            if let Some(part) = caps.get(3) {
                parts.push(&part.as_str());
            }
        }

        match parts.as_slice() {
            ["name", name] => {
                debug!("Registering name: {}", name);
                state.name = Some(name.to_string());
            }
            ["template", "person"] => {
                // command: collider handcrafted
                state.collider_is_one_mesh_of_scene = true;

                // command: alive yes
                state.is_alive = true;
                state.is_lifeform = true;
                state.is_suited = true;

                // command: oxygen 0.864
                state.is_lifeform = true;
                state.is_suited = true;
                state.oxygen = nature::OXY_D;

                // command: engine monopropellant
                state.engine_type = actor::EngineType::Monopropellant;

                // command: thrust 1.2 1 1 14 1.5
                state.thrust_forward = 1.2;
                state.thrust_back = 1.0;
                state.thrust_sideways = 1.0;
                state.reaction_wheels = 14.0;
                state.warmup_seconds = 1.5;

                // command: wants maxrotation 0
                state.wants_maxrotation = Some(0.0);
                // command: wants maxvelocity 0
                state.wants_maxvelocity = Some(0.0);

                // command: pointofinterest yes
                state.is_point_of_interest = true;

                // command: density 200
                state.density = 200.0;

                // command: angularmomentum 0 0 0
                state.angular_momentum = DVec3::ZERO;
            }
            ["template", "clippy"] => {
                // command: angularmomentum 0 0 0
                state.angular_momentum = DVec3::ZERO;

                // command: wants maxrotation 0
                state.wants_maxrotation = Some(0.0);
                // command: wants maxvelocity 0
                state.wants_maxvelocity = Some(0.0);

                // command: thrust 15 6 3 400 0.5
                state.thrust_forward = 15.0;
                state.thrust_back = 6.0;
                state.thrust_sideways = 3.0;
                state.reaction_wheels = 400.0;
                state.warmup_seconds = 0.5;

                // command: scale 3
                state.model_scale = 3.0;

                // command: pronoun it
                state.pronoun = Some("it".to_string());

                // command: pointofinterest yes
                state.is_point_of_interest = true;
            }
            ["template", "cruiser"] => {
                // command: actor ? ? ? cruiser
                state.class = DefClass::Actor;
                state.model = Some("cruiser".to_string());

                // command: scale 5
                state.model_scale = 5.0;

                // command: vehicle yes
                state.is_vehicle = true;

                // command: angularmomentum 0 0 0
                state.angular_momentum = DVec3::ZERO;

                // command: collider handcrafted
                state.collider_is_one_mesh_of_scene = true;

                // command: thrust 16 16 8 100000 3
                state.thrust_forward = 16.0;
                state.thrust_back = 16.0;
                state.thrust_sideways = 8.0;
                state.reaction_wheels = 100000.0;
                state.warmup_seconds = 3.0;

                // command: engine ion
                state.engine_type = actor::EngineType::Ion;

                // command: camdistance 50
                state.camdistance = 50.0;

                // command: density 500
                state.density = 500.0;

                // command: pointofinterest yes
                state.is_point_of_interest = true;
            }

            // Parsing actors
            ["actor", x, y, z, model] => {
                ew_spawn.send(SpawnEvent(state));
                state = ParserState::default();
                state.class = DefClass::Actor;
                state.model = Some(model.to_string());
                if let (Ok(x_float), Ok(y_float), Ok(z_float)) =
                    (x.parse::<f64>(), y.parse::<f64>(), z.parse::<f64>())
                {
                    state.pos = DVec3::new(x_float, y_float, z_float);
                } else {
                    error!("Can't parse coordinates as floats in def: {line}");
                    state = ParserState::default();
                    continue;
                }
            }
            ["actor", x, y, z] => {
                ew_spawn.send(SpawnEvent(state));
                state = ParserState::default();
                state.class = DefClass::Actor;
                if let (Ok(x_float), Ok(y_float), Ok(z_float)) =
                    (x.parse::<f64>(), y.parse::<f64>(), z.parse::<f64>())
                {
                    state.pos = DVec3::new(x_float, y_float, z_float);
                } else {
                    error!("Can't parse coordinates as floats in def: {line}");
                    state = ParserState::default();
                    continue;
                }
            }
            ["scene", x, y, z, name] => {
                ew_spawn.send(SpawnEvent(state));
                state = ParserState::default();
                state.class = DefClass::Scene;
                state.name = Some(name.to_string());
                if let (Ok(x_float), Ok(y_float), Ok(z_float)) =
                    (x.parse::<f64>(), y.parse::<f64>(), z.parse::<f64>())
                {
                    state.pos = DVec3::new(x_float, y_float, z_float);
                } else {
                    error!("Can't parse coordinates as floats in def: {line}");
                    state = ParserState::default();
                    continue;
                }
            }
            ["relativeto", id] => {
                // Offsets this actor's position by the pos. of the actor with the given id.
                state.relative_to = Some(id.to_string());
            }
            ["orbitaround", object_id, radius_str] => {
                // Places the actor into an orbit around the object_id so that it's position
                // will be offset by the orbital distance (radius_str) and the phase will
                // be set dynamically based on the current day+time.
                // Unlike the "orbit" command, this position is not static, and there is no
                // parameter for a phase offset, though you can set that with the
                // "orbit_phase_offset" command.
                // Make sure to use this with "relativeto" with the object that's being orbited.
                if let Ok(r) = radius_str.parse::<f64>() {
                    state.orbit_distance = Some(r);
                    state.orbit_object_id = Some(object_id.to_string());
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["orbit", radius_str, phase_str] => {
                // Offsets the actor's position by the given distance (radius_str)
                // in the direction as defined by the angle in phase_str.
                // Unlike "orbitaround", the position is static though and will not
                // change over time.
                // Make sure to use this with "relativeto" with the object that's being orbited.
                if let (Ok(r), Ok(phase)) = (radius_str.parse::<f64>(), phase_str.parse::<f64>()) {
                    state.orbit_distance = Some(r);
                    state.orbit_phase = Some(phase * PI * 2.0);
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["orbit_phase_offset", value] => {
                // When used in combination with "orbitaround", this command allows
                // you to move the actor ahead (or behind) in its orbit by the given offset.
                if let Ok(value_float) = value.parse::<f64>() {
                    let offset_radians = 2.0 * PI * value_float;
                    if let Some(phase_radians) = state.orbit_phase {
                        state.orbit_phase = Some(phase_radians + offset_radians);
                    } else {
                        state.orbit_phase = Some(offset_radians);
                    }
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["sphere", "yes"] => {
                state.is_sphere = true;
            }
            ["id", id] => {
                state.id = id.to_string();
            }
            ["alive", "yes"] => {
                state.is_alive = true;
                state.is_lifeform = true;
                state.is_suited = true;
            }
            ["alive", "no"] => {
                state.is_alive = false;
            }
            ["vehicle", "yes"] => {
                state.is_vehicle = true;
            }
            ["clickable", "no"] => {
                state.is_clickable = false;
            }
            ["moon", "yes"] => {
                state.is_moon = true;
            }
            ["planet", "yes"] => {
                state.is_planet = true;
            }
            ["sun", "yes"] => {
                state.is_sun = true;
            }
            ["ring", "yes"] => {
                state.has_ring = true;
            }
            ["pointofinterest", "yes"] => {
                state.is_point_of_interest = true;
            }
            ["oxygen", amount] => {
                if let Ok(amount) = amount.parse::<f32>() {
                    state.is_lifeform = true;
                    state.is_suited = true;
                    state.oxygen = amount;
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["pronoun", pronoun] => {
                state.pronoun = Some(pronoun.to_string());
            }
            ["chatid", chat] => {
                state.chat = chat.to_string();
            }
            ["scale", scale] => {
                if let Ok(scale_float) = scale.parse::<f32>() {
                    state.model_scale = scale_float;
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["rotationx", rotation_x] => {
                if let Ok(rotation_x_float) = rotation_x.parse::<f32>() {
                    state.rotation *= Quat::from_rotation_x(rotation_x_float.to_radians());
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["rotationy", rotation_y] => {
                if let Ok(rotation_y_float) = rotation_y.parse::<f32>() {
                    state.rotation *= Quat::from_rotation_y(rotation_y_float.to_radians());
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["rotationz", rotation_z] => {
                if let Ok(rotation_z_float) = rotation_z.parse::<f32>() {
                    state.rotation *= Quat::from_rotation_z(rotation_z_float.to_radians());
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["axialtilt", rotation_y] => {
                if let Ok(rotation_y_float) = rotation_y.parse::<f32>() {
                    state.rotation *= Quat::from_rotation_y(rotation_y_float.to_radians());
                    state.axialtilt = rotation_y_float;
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["velocity", x, y, z] => {
                if let (Ok(x_float), Ok(y_float), Ok(z_float)) =
                    (x.parse::<f64>(), y.parse::<f64>(), z.parse::<f64>())
                {
                    state.velocity = DVec3::new(x_float, y_float, z_float);
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["angularmomentum", x, y, z] => {
                if let (Ok(x_float), Ok(y_float), Ok(z_float)) =
                    (x.parse::<f64>(), y.parse::<f64>(), z.parse::<f64>())
                {
                    state.angular_momentum = DVec3::new(x_float, y_float, z_float);
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["thrust", forward, back, sideways, reaction_wheels, warmup_time] => {
                if let (
                    Ok(forward_float),
                    Ok(back_float),
                    Ok(sideways_float),
                    Ok(reaction_wheels_float),
                    Ok(warmup_time_float),
                ) = (
                    forward.parse::<f32>(),
                    back.parse::<f32>(),
                    sideways.parse::<f32>(),
                    reaction_wheels.parse::<f32>(),
                    warmup_time.parse::<f32>(),
                ) {
                    state.thrust_forward = forward_float;
                    state.thrust_back = back_float;
                    state.thrust_sideways = sideways_float;
                    state.reaction_wheels = reaction_wheels_float;
                    state.warmup_seconds = warmup_time_float;
                }
            }
            ["engine", "ion"] => {
                state.engine_type = actor::EngineType::Ion;
            }
            ["engine", "monopropellant"] => {
                state.engine_type = actor::EngineType::Monopropellant;
            }
            ["health", value] => {
                if let Ok(value_float) = value.parse::<f32>() {
                    state.suit_integrity = value_float;
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["density", value] => {
                if let Ok(value_float) = value.parse::<f64>() {
                    state.density = value_float;
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["physics", "off"] => {
                state.has_physics = false;
            }
            ["collider", "sphere", radius] => {
                if let Ok(radius_float) = radius.parse::<f64>() {
                    state.collider = Collider::sphere(radius_float);
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["collider", "capsule", height, radius] => {
                if let (Ok(height_float), Ok(radius_float)) =
                    (height.parse::<f64>(), radius.parse::<f64>())
                {
                    state.collider = Collider::capsule(height_float, radius_float);
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["collider", "mesh"] => {
                state.collider_is_mesh = true;
            }
            ["collider", "handcrafted"] => {
                state.collider_is_one_mesh_of_scene = true;
            }
            ["player", "yes"] => {
                state.is_player = true;
                state.is_alive = true;
            }
            ["camdistance", value] => {
                if let Ok(value_float) = value.parse::<f32>() {
                    state.camdistance = value_float;
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["light", color_hex, brightness] => {
                if let Ok(brightness_float) = brightness.parse::<f32>() {
                    if let Ok(color) = Srgba::hex(color_hex) {
                        state.light_color = Some(Color::Srgba(color));
                        state.light_brightness = brightness_float;
                    } else {
                        error!("Can't parse hexadecimal color code: {line}");
                        continue;
                    }
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["wants", "maxrotation", "none"] => {
                state.wants_maxrotation = None;
            }
            ["wants", "maxrotation", value] => {
                // NOTE: requires an engine to slow down velocity
                if let Ok(value_float) = value.parse::<f64>() {
                    state.wants_maxrotation = Some(value_float);
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["wants", "maxvelocity", "none"] => {
                state.wants_maxvelocity = None;
            }
            ["wants", "maxvelocity", value] => {
                // NOTE: requires an engine to slow down velocity
                if let Ok(value_float) = value.parse::<f64>() {
                    state.wants_maxvelocity = Some(value_float);
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            ["wants", "lookat", id] => {
                // NOTE: Will not work if the actor has no engine
                state.wants_tolookat_id = Some(id.to_string());
            }
            ["wants", "matchvelocitywith", id] => {
                // NOTE: Will not work if the actor has no engine
                state.wants_matchvelocity_id = Some(id.to_string());
            }
            ["armodel", asset_name] => {
                state.ar_model = Some(asset_name.to_string());
            }
            ["targeted", "yes"] => {
                state.is_targeted_on_startup = true;
            }
            ["only_in_map_at_dist", value, id] => {
                if let Ok(value_float) = value.parse::<f64>() {
                    state.show_only_in_map_at_distance = Some((value_float, id.to_string()));
                } else {
                    error!("Can't parse float: {line}");
                    continue;
                }
            }
            _ => {
                error!("No match for [{}]", parts.join(","));
            }
        }
    }
    ew_spawn.send(SpawnEvent(state));
}

fn handle_spawn_events(
    mut er_spawn: EventReader<SpawnEvent>,
    mut ew_spawnscene: EventWriter<SpawnSceneEvent>,
    mut ew_spawnactor: EventWriter<SpawnActorEvent>,
) {
    for state in er_spawn.read() {
        match state.0.class {
            DefClass::Actor => {
                ew_spawnactor.send(SpawnActorEvent(state.0.clone()));
            }
            DefClass::Scene => {
                ew_spawnscene.send(SpawnSceneEvent(state.0.clone()));
            }
            DefClass::None => {}
        }
    }
}

fn spawn_scenes(
    mut er_spawnscene: EventReader<SpawnSceneEvent>,
    mut ew_spawn: EventWriter<SpawnEvent>,
) {
    for state_wrapper in er_spawnscene.read() {
        let root_state = &state_wrapper.0;

        let scene_defs = include!("data/scenes.in");
        for (name, template, pos, rot) in scene_defs {
            if Some(name.to_string()) == root_state.name {
                match template {
                    "cruiser" => {
                        let mut state = ParserState::default();
                        state.class = DefClass::Actor;
                        state.pos = DVec3::new(
                            root_state.pos[0] + pos[0],
                            root_state.pos[1] - pos[2],
                            root_state.pos[2] + pos[1],
                        );
                        state.model = Some("cruiser".to_string());

                        state.rotation = Quat::from_euler(EulerRot::XYZ, rot[0], rot[1], rot[2]);

                        // command: relativeto ?
                        state.relative_to = root_state.relative_to.clone();

                        // command: name Cruiser
                        state.name = Some("Cruiser".to_string());

                        // command: scale 5
                        state.model_scale = 5.0;

                        // command: vehicle yes
                        state.is_vehicle = true;

                        // command: angularmomentum 0 0 0
                        state.angular_momentum = DVec3::ZERO;

                        // command: collider handcrafted
                        state.collider_is_one_mesh_of_scene = true;

                        // command: thrust 16 16 8 100000 3
                        state.thrust_forward = 16.0;
                        state.thrust_back = 16.0;
                        state.thrust_sideways = 8.0;
                        state.reaction_wheels = 100000.0;
                        state.warmup_seconds = 3.0;

                        // command: engine ion
                        state.engine_type = actor::EngineType::Ion;

                        // command: camdistance 50
                        state.camdistance = 50.0;

                        // command: density 500
                        state.density = 500.0;

                        // command: pointofinterest yes
                        state.is_point_of_interest = true;
                        ew_spawn.send(SpawnEvent(state));
                    }
                    "shippingcontainer" => {
                        let mut state = ParserState::default();
                        state.class = DefClass::Actor;
                        state.pos = DVec3::new(
                            root_state.pos[0] + pos[0],
                            root_state.pos[1] - pos[2],
                            root_state.pos[2] + pos[1],
                        );
                        state.model = Some("shippingcontainer".to_string());

                        state.rotation = Quat::from_euler(EulerRot::XYZ, rot[0], rot[1], rot[2]);

                        // command: relativeto ?
                        state.relative_to = root_state.relative_to.clone();

                        // command: name Cruiser
                        state.name = Some("Shipping Container".to_string());

                        // command: scale 8
                        state.model_scale = 8.0;

                        // command: angularmomentum 0 0 0
                        state.angular_momentum = DVec3::ZERO;

                        // command: collider handcrafted
                        state.collider_is_one_mesh_of_scene = true;

                        // command: density 500
                        state.density = 500.0;

                        // command: pointofinterest yes
                        ew_spawn.send(SpawnEvent(state));
                    }
                    _ => {}
                }
            }
        }
    }
}

fn spawn_entities(
    mut er_spawn: EventReader<SpawnActorEvent>,
    mut commands: Commands,
    asset_server: Res<AssetServer>,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<StandardMaterial>>,
    mut materials_jupiter: ResMut<Assets<load::JupitersRing>>,
    mut id2pos: ResMut<game::Id2Pos>,
    mut achievement_tracker: ResMut<var::AchievementTracker>,
    mut ew_updateavatar: EventWriter<hud::UpdateAvatarEvent>,
    settings: Res<var::Settings>,
) {
    for state_wrapper in er_spawn.read() {
        let jupiter_pos: DVec3 = if let Some(jupiter_pos) = id2pos.0.get(ID_JUPITER) {
            *jupiter_pos
        } else {
            warn!("Could not determine Jupiter's position");
            DVec3::ZERO
        };
        let state = &state_wrapper.0;
        let mut rotation = state.rotation;

        // Preprocessing
        let mut absolute_pos = if let Some(id) = &state.relative_to {
            match id2pos.0.get(&id.to_string()) {
                Some(pos) => state.pos + *pos,
                None => {
                    error!("Specified `relativeto` command but could not find id `{id}`");
                    continue;
                }
            }
        } else {
            state.pos
        };
        if let Some(r) = state.orbit_distance {
            let mass: Option<f64> = if let Some(id) = &state.orbit_object_id {
                match id.as_str() {
                    "jupiter" => Some(nature::JUPITER_MASS),
                    "sol" => Some(nature::JUPITER_MASS),
                    _ => {
                        error!("Found no mass for object `{id}`");
                        continue;
                    }
                }
            } else {
                None
            };
            absolute_pos += nature::pos_offset_for_orbiting_body(r, mass, state.orbit_phase);
        }
        let scale = Vec3::splat(
            if state.is_sun {
                5.0
            } else if state.is_moon && settings.large_moons {
                3.0
            } else {
                1.0
            } * state.model_scale,
        );
        let orbits_jupiter = state.id != ID_JUPITER;
        let velocity = if orbits_jupiter {
            let coords = absolute_pos - jupiter_pos;
            state.velocity + nature::orbital_velocity(coords, nature::JUPITER_MASS)
        } else {
            state.velocity
        };

        // Spawn the actor
        let actor_entity;
        let mut actor = commands.spawn_empty();
        actor.insert(actor::Actor {
            id: state.id.clone(),
            name: state.name.clone(),
            camdistance: state.camdistance,
            ..default()
        });
        actor.insert(SleepingDisabled);
        if orbits_jupiter {
            actor.insert(actor::OrbitsJupiter);
        }
        actor.insert(world::DespawnOnPlayerDeath);
        actor.insert(actor::HitPoints::default());
        actor.insert(Position::from(absolute_pos));
        if state.is_sphere {
            let sphere_texture_handle = if let Some(model) = &state.model {
                Some(asset_server.load(format!("textures/{}.jpg", model)))
            } else {
                None
            };
            rotation = Quat::from_rotation_x(-90f32.to_radians()) * rotation;
            let sphere_handle = meshes.add(Sphere::new(1.0).mesh().uv(128, 128));
            let sphere_material_handle = materials.add(StandardMaterial {
                base_color_texture: sphere_texture_handle,
                perceptual_roughness: 1.0,
                metallic: 0.0,
                ..default()
            });
            actor.insert(PbrBundle {
                mesh: sphere_handle,
                material: sphere_material_handle,
                transform: Transform::from_scale(scale),
                ..default()
            });
        } else if let Some(model) = &state.model {
            actor.insert(SpatialBundle {
                transform: Transform::from_scale(scale),
                ..default()
            });
            load_asset(model.as_str(), &mut actor, &*asset_server);
        }
        actor.insert(Rotation::from(rotation));

        // Physics Parameters
        if state.has_physics {
            actor.insert(RigidBody::Dynamic);
            actor.insert(LinearVelocity(velocity));
            actor.insert(AngularVelocity(state.angular_momentum));
            actor.insert(ColliderDensity(state.density));
            if state.collider_is_mesh {
                actor.insert(MassPropertiesBundle::new_computed(
                    &Collider::sphere(0.5 * state.model_scale as f64),
                    state.density,
                ));
                actor.insert(AsyncSceneCollider::new(Some(
                    ComputedCollider::TriMesh, //ComputedCollider::ConvexDecomposition(VHACDParameters::default())
                )));
            } else if state.collider_is_one_mesh_of_scene {
                actor.insert(MassPropertiesBundle::new_computed(
                    &Collider::sphere(0.5 * state.model_scale as f64),
                    state.density,
                ));
                actor.insert(
                    AsyncSceneCollider::new(None)
                        .with_shape_for_name("Collider", ComputedCollider::TriMesh)
                        .with_layers_for_name("Collider", CollisionLayers::ALL), //.with_density_for_name("Collider", state.density)
                );
                actor.insert(NeedsSceneColliderRemoved);
            } else {
                actor.insert(state.collider.clone());
            }
        }
        // TODO: angular velocity for objects without collisions, static objects

        // Optional Components
        if state.is_player {
            actor.insert(actor::Player);
            actor.insert(actor::PlayerCamera);
            actor.insert(hud::AugmentedRealityOverlayBroadcaster);
            ew_updateavatar.send(hud::UpdateAvatarEvent);
        }
        if state.is_sun {
            let (r, g, b) = nature::star_color_index_to_rgb(0.656);
            actor.insert(materials.add(StandardMaterial {
                base_color: Color::srgb(r * 13.0, g * 13.0, b * 13.0),
                unlit: true,
                ..default()
            }));
            actor.insert((NotShadowCaster, NotShadowReceiver));
        }
        if state.is_targeted_on_startup {
            actor.insert(hud::IsTargeted);
        }
        if let Some((mindist, id)) = &state.show_only_in_map_at_distance {
            actor.insert(camera::ShowOnlyInMap {
                min_distance: *mindist,
                distance_to_id: id.clone(),
            });
        }
        if state.is_player || state.is_vehicle {
            // used to apply mouse movement to actor rotation
            actor.insert(ExternalTorque::ZERO.with_persistence(false));
        }
        if state.is_lifeform {
            actor.insert(actor::LifeForm::default());
            actor.insert(actor::ExperiencesGForce::default());
            actor.insert(actor::Suit {
                oxygen: state.oxygen,
                oxygen_max: nature::OXY_D,
                integrity: state.suit_integrity,
                ..default()
            });
            actor.insert(actor::Battery::default());
        }
        if state.is_clickable {
            actor.insert(hud::IsClickable {
                name: state.name.clone(),
                pronoun: state.pronoun.clone(),
                ..default()
            });
        }
        if let Some(value) = state.wants_maxrotation {
            actor.insert(actor::WantsMaxRotation(value));
        }
        if let Some(value) = state.wants_maxvelocity {
            actor.insert(actor::WantsMaxVelocity(value));
        }
        if let Some(value) = &state.wants_tolookat_id {
            actor.insert(actor::WantsToLookAt(value.clone()));
        }
        if let Some(value) = &state.wants_matchvelocity_id {
            actor.insert(actor::WantsMatchVelocityWith(value.clone()));
        }
        if let Some(color) = state.light_color {
            actor.insert((
                PointLight {
                    intensity: state.light_brightness,
                    color,
                    range: 2000.0,
                    shadows_enabled: settings.shadows_pointlights,
                    ..default()
                },
                bevy::pbr::CubemapVisibleEntities::default(),
                bevy::render::primitives::CubemapFrusta::default(),
            ));
        }
        if !state.id.is_empty() {
            actor.insert(actor::Identifier(state.id.clone()));
            id2pos.0.insert(state.id.clone(), absolute_pos);
        }
        if !state.chat.is_empty() {
            actor.insert(chat::Talker {
                actor_id: state.id.clone(),
                chat_name: state.chat.clone(),
                name: state.name.clone(),
                pronoun: state.pronoun.clone(),
                talking_speed: 1.0,
            });
            if let Some(name) = &state.name {
                achievement_tracker.all_people.insert(name.clone());
            }
        }
        if state.is_vehicle {
            actor.insert(actor::Vehicle::default());
            if let Some(name) = &state.name {
                achievement_tracker.all_vehicles.insert(name.clone());
            }
        }
        if state.is_vehicle
            || state.is_suited
            || state.thrust_forward > 0.0
            || state.thrust_sideways > 0.0
            || state.thrust_back > 0.0
            || state.reaction_wheels > 0.0
        {
            actor.insert(actor::Engine {
                thrust_forward: state.thrust_forward,
                thrust_back: state.thrust_back,
                thrust_sideways: state.thrust_sideways,
                reaction_wheels: state.reaction_wheels,
                warmup_seconds: state.warmup_seconds,
                engine_type: state.engine_type,
                ..default()
            });
        }
        if let Some(_) = state.ar_model {
            actor.insert(hud::AugmentedRealityOverlayBroadcaster);
        }
        if state.is_player {
            actor.with_children(|builder| {
                builder.spawn((
                    world::DespawnOnPlayerDeath,
                    actor::PlayersFlashLight,
                    SpotLightBundle {
                        transform: Transform {
                            translation: Vec3::new(0.0, 0.0, 1.0),
                            rotation: Quat::from_rotation_y(180f32.to_radians()),
                            ..default()
                        },
                        spot_light: SpotLight {
                            intensity: 400_000_000.0, // lumens
                            color: Color::WHITE,
                            shadows_enabled: true,
                            inner_angle: PI32 / 8.0 * 0.85,
                            outer_angle: PI32 / 4.0,
                            range: 3000.0,
                            ..default()
                        },
                        visibility: Visibility::Hidden,
                        ..default()
                    },
                ));
            });
        }
        actor_entity = actor.id();

        if let Some(ar_asset_name) = &state.ar_model {
            let mut entitycmd = commands.spawn((
                hud::AugmentedRealityOverlay {
                    owner: actor_entity,
                    scale: 1.0,
                },
                world::DespawnOnPlayerDeath,
                SpatialBundle {
                    visibility: Visibility::Hidden,
                    ..default()
                },
                NotShadowCaster,
                NotShadowReceiver,
            ));
            load_asset(ar_asset_name, &mut entitycmd, &*asset_server);
        }

        if state.is_point_of_interest || state.is_moon || state.is_planet {
            let mut entitycmd = commands.spawn((
                hud::PointOfInterestMarker(actor_entity),
                world::DespawnOnPlayerDeath,
                hud::ToggleableHudElement,
                SpatialBundle {
                    visibility: Visibility::Hidden,
                    ..default()
                },
                NotShadowCaster,
                NotShadowReceiver,
            ));
            let model = if state.is_point_of_interest {
                "point_of_interest"
            } else if state.is_planet {
                "marker_planets"
            } else {
                "marker_satellites"
            };
            load_asset(model, &mut entitycmd, &*asset_server);
        }

        if state.has_ring {
            let ring_radius =
                state.model_scale * (nature::JUPITER_RING_RADIUS / nature::JUPITER_RADIUS) as f32;
            commands.spawn((
                world::DespawnOnPlayerDeath,
                MaterialMeshBundle {
                    mesh: meshes.add(Mesh::from(Cylinder::new(ring_radius, 1.0))),
                    material: materials_jupiter.add(load::JupitersRing {
                        alpha_mode: AlphaMode::Blend,
                        ring_radius: nature::JUPITER_RING_RADIUS as f32,
                        jupiter_radius: nature::JUPITER_RADIUS as f32,
                    }),
                    transform: Transform::from_translation(absolute_pos.as_vec3()),
                    ..default()
                },
                Position::new(absolute_pos),
                Rotation::from(Quat::from_rotation_z(-state.axialtilt.to_radians())),
                NotShadowCaster,
                NotShadowReceiver,
            ));
        }
    }
}

pub fn hide_colliders(
    mut q_mesh: Query<(&mut Visibility, &Name), (Added<Visibility>, With<Handle<Mesh>>)>,
) {
    for (mut visibility, name) in &mut q_mesh {
        if name.as_str() == "Collider" {
            *visibility = Visibility::Hidden;
        }
    }
}

pub fn process_mesh(
    mut commands: Commands,
    mut q_mesh: Query<(Entity, &Name, &Parent), Added<Handle<Mesh>>>,
    q_parents: Query<(
        Option<&Parent>,
        Option<&actor::Player>,
        Option<&NotShadowCaster>,
        Option<&NotShadowReceiver>,
    )>,
) {
    // Add "PlayerCollider" component to the player's collider mesh entity
    for (child_entity, child_name, child_parent) in &mut q_mesh {
        // get the root parent
        let mut get_parent = q_parents.get(child_parent.get());
        while let Ok((parent_maybe, _, _, _)) = get_parent {
            if let Some(parent) = parent_maybe {
                get_parent = q_parents.get(parent.get());
            } else {
                break;
            }
        }

        if let Ok((_, player, noshadowcast, noshadowrecv)) = get_parent {
            let childcmd = &mut commands.entity(child_entity);

            // If the root parent is the player, add PlayerCollider to the collider mesh
            if player.is_some() && child_name.as_str() == "Collider" {
                childcmd.insert(actor::PlayerCollider);
            }

            if noshadowcast.is_some() {
                childcmd.insert(NotShadowCaster);
            }
            if noshadowrecv.is_some() {
                childcmd.insert(NotShadowReceiver);
            }
        }
    }
}