import { TerrainState } from './terrain-state.js';
import { loadLightProperties } from './light-properties.js';

// Geometry never queues behind a whole-view lighting build.
const state = loadLightProperties().then(properties => new TerrainState(properties));
self.onmessage = ({data}) => state.then(terrain => {
  if (data.type === 'sync') {
    if (terrain.sync(data)) self.postMessage({type:'synced',epoch:data.epoch,version:data.version});
  } else if (data.type === 'mesh') {
    const result = terrain.meshLocal(data);
    self.postMessage(result, result.vertices ? [result.vertices.buffer,result.transparent.buffer] : []);
  }
}).catch(error => self.postMessage({...data,type:'error',error:error.message}));