import { memoize } from 'lodash'
import { simplifyWasm } from '../../lib/simplify-wasm/index.js'

import { dataSelector } from './data/index.js'

async function numberOfNodes(dataset, tol, highQual) {
  let data = await dataSelector(dataset)
  return await simplifyWasm(data, tol, highQual).then(arr => arr.length)
}

const memNumberOfNodes = memoize(numberOfNodes, (...args) => args.join('|'))

export async function simplifyMapper({ dataset, tolRange, highQual }) {
  let items = tolRange.map(tol => memNumberOfNodes(dataset, tol, highQual))
  return await Promise.all(items)
}