use skia_safe as skia;
use std::collections::HashMap;
use uuid::Uuid;

use crate::render::RenderState;
use crate::shapes::Shape;

/// This struct holds the state of the Rust application between JS calls.
///
/// It is created by [init] and passed to the other exported functions.
/// Note that rust-skia data structures are not thread safe, so a state
/// must not be shared between different Web Workers.
pub(crate) struct State<'a> {
    pub render_state: RenderState,
    pub current_id: Option<Uuid>,
    pub current_shape: Option<&'a mut Shape>,
    pub shapes: HashMap<Uuid, Shape>,
}

impl<'a> State<'a> {
    pub fn with_capacity(width: i32, height: i32, capacity: usize) -> Self {
        State {
            render_state: RenderState::new(width, height),
            current_id: None,
            current_shape: None,
            shapes: HashMap::with_capacity(capacity),
        }
    }

    pub fn set_surface(&mut self, surface: skia::Surface) {
        self.render_state.surface = surface;
    }
}