use crate::packets::{Object, Packet, Resource};
use glam::Vec3;
use std::collections::HashMap;

pub struct SceneTree {
    objects: HashMap<Object, ObjectData>,
}
struct ObjectData {
    pos: Vec3,
    rot: Vec3,
    parent: Object,
    pose: Vec<f32>,
    res: Resource,
}
impl Default for SceneTree {
    fn default() -> Self {
        Self {
            objects: Default::default(),
        }
    }
}
impl SceneTree {
    pub fn update(&mut self, p: &Packet) {
        match p {
            Packet::Add(object, res) => {
                self.objects.insert(*object, ObjectData {
                    parent: Object(0),
                    pos: Vec3::ZERO,
                    rot: Vec3::ZERO,
                    pose: Vec::new(),
                    res: *res,
                });
            }
            Packet::Remove(object) => {
                self.objects.remove(&object);
            }
            Packet::Position(object, pos, rot) => {
                if let Some(o) = self.objects.get_mut(&object) {
                    o.pos = *pos;
                    o.rot = *rot;
                }
            }
            Packet::Pose(object, pose) => {
                if let Some(o) = self.objects.get_mut(&object) {
                    o.pose = pose.to_vec();
                }
            }
            Packet::Parent(parent, child) => {
                if let Some(o) = self.objects.get_mut(&parent) {
                    o.parent = *child
                }
            }
            _ => (),
        }
    }

    pub fn prime_client(&self) -> impl Iterator<Item = Packet> {
        self.objects
            .iter()
            .map(|(object, data)| {
                [
                    Packet::Add(*object, data.res),
                    Packet::Parent(*object, data.parent),
                    Packet::Position(*object, data.pos, data.rot),
                    Packet::Pose(*object, data.pose.clone()),
                ]
            })
            .flatten()
    }
}