import { handValue, canDouble, canSplit } from './BlackjackLogic.js';

// ─── Bet sizing ───────────────────────────────────────────────────────────────

export function chooseBet(player) {
  const options = [5, 10, 15, 25];
  const raw = options[Math.floor(Math.random() * options.length)];
  return Math.min(raw, player.chips, 100);
}

// ─── Action selection (basic strategy) ───────────────────────────────────────

export function chooseAction(player, dealerUpcard) {
  const hand = player.activeHand === 1 ? player.hand2 : player.hand;
  const { score, soft } = handValue(hand);
  const upVal = Math.min(dealerUpcard.value, 10); // treat 10/J/Q/K as 10

  // Split decisions
  if (canSplit(player)) {
    const rank = player.hand[0].rank;
    if (rank === 'A' || rank === '8') return 'split';
    if (rank === '5' || rank === 'T' || rank === 'J' || rank === 'Q' || rank === 'K') {
      // never split 5s or 10-values
    } else if (upVal >= 2 && upVal <= 6) {
      return 'split';
    }
  }

  // Double decisions
  if (canDouble(player)) {
    if (!soft) {
      if (score === 11) return 'double';
      if (score === 10 && upVal <= 9) return 'double';
      if (score === 9 && upVal >= 3 && upVal <= 6) return 'double';
    } else {
      // Soft doubles
      if ((score === 17 || score === 18) && upVal >= 3 && upVal <= 6) return 'double';
    }
  }

  // Soft totals
  if (soft) {
    if (score >= 19) return 'stand';
    if (score === 18) return upVal >= 9 ? 'hit' : 'stand';
    return 'hit';
  }

  // Hard totals
  if (score >= 17) return 'stand';
  if (score >= 13 && upVal <= 6) return 'stand';
  if (score === 12 && upVal >= 4 && upVal <= 6) return 'stand';
  return 'hit';
}

export function chooseInsurance() {
  return false; // AI always declines insurance
}