Notation.ts

/* eslint-disable prefer-destructuring */
import { Square } from 'chess.js'
import { Dimensions } from 'react-native'
import { Vector } from 'react-native-redash'

const { width } = Dimensions.get('window')
export const SIZE = width / 8

export const toTranslation = (to: Square) => {
  'worklet'
  // worklet don't support destructuring yet
  const tokens = to.split('')
  const col = tokens[0]
  const row = tokens[1]
  if (!col || !row) {
    throw new Error('Invalid notation: ' + to)
  }
  const indexes = {
    x: col.charCodeAt(0) - 'a'.charCodeAt(0),
    y: parseInt(row, 10) - 1,
  }
  return {
    x: indexes.x * SIZE,
    y: 7 * SIZE - indexes.y * SIZE,
  }
}

export const toPosition = ({ x, y }: Vector) => {
  'worklet'
  const col = String.fromCharCode(97 + Math.round(x / SIZE))
  const row = `${8 - Math.round(y / SIZE)}`
  return `${col}${row}` as Square
}

export const coordsToPosition = ({ x, y }: Vector) => {
  'worklet'
  const col = String.fromCharCode(97 + Math.floor(x / SIZE))
  const row = `${8 - Math.floor(y / SIZE)}`
  return `${col}${row}` as Square
}