use rustc_hash::FxHashSet;
use serde::{Deserialize, Serialize};

use crate::{
	file::FileManager,
	script::{ScriptContext, ScriptManager, WasmRunner},
};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct Scene {
	pub name: Box<str>,
	pub scripts: Vec<usize>,
}

pub fn scene_id_by_name(scenes: &[Scene], name: &str) -> Option<usize> {
	for (i, scene) in scenes.iter().enumerate() {
		if &*scene.name == name {
			return Some(i);
		}
	}

	None
}

pub fn switch_scenes(
	scripts: &mut ScriptManager,
	context: &mut ScriptContext<'_>,
	files: &mut FileManager,
	wasm_runner: &WasmRunner,
	new: usize,
) {
	let active_scripts = scripts
		.active_scripts
		.iter()
		.cloned()
		.collect::<Box<[usize]>>();
	for script_id in &active_scripts {
		scripts.deactivate_script(*script_id, context, wasm_runner, files);
	}

	let mut needed_scripts = FxHashSet::default();
	let scene = &context.manifest.scenes[new];
	for script_id in &scene.scripts {
		needed_scripts.insert(*script_id);
		scripts.activate_script(*script_id, context, wasm_runner, files);
	}
}