All files / web/src/components/toys/number-line/lcmHopper lcmHopperState.ts

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/**
 * LCM Hopper types and utility functions.
 *
 * Pure types — no React, no side effects.
 */
 
// ── Guess state ────────────────────────────────────────────────────────
 
export type GuessResult = 'correct' | 'close' | 'wrong' | null
 
/** Evaluate a guess against the LCM */
export function evaluateGuess(guess: number, lcmVal: number): GuessResult {
  if (Math.abs(guess - lcmVal) <= 1) return 'correct'
  if (Math.abs(guess - lcmVal) / lcmVal <= 0.2) return 'close'
  return 'wrong'
}