'use client';

import type { Action, GameView } from '@/game/engine';
import { nexusCardMode } from '@/game/nexus-cards';
import { CardInspector, CardRules } from './card-inspector';
import { NexusCardFace } from './nexus-cards';
import { Button } from './ui/button';

/** The public boundary is neutral; only the buyer's projection authorizes a choice. */
export function NexusIxianReplacement({ game, act, busy }: {
  game: GameView;
  act: (action: Action) => void;
  busy: boolean;
}) {
  const offer = game.nexusIxianReplacement;
  if (!offer) return null;
  const buyer = game.players.find((player) => player.id === offer.buyer);
  const own = game.players.find((player) => player.id === game.me);
  const canRespond = !!offer.event && offer.buyer === game.me && offer.canPass;
  const canUse = canRespond && offer.canUse && !offer.blocked && !!offer.purchased;
  const priorityBlocked = !!game.truthtrance || !!game.response || !!game.phaseOpening ||
    !!game.automaticContinuationPending || !!game.kullReaction || !!game.kullCounterEvent ||
    !!game.richeseBetrayalReaction || !!game.guildBetrayalReaction || !!game.semutaReaction ||
    !!game.nexusCards?.waiting.length || !!game.nexusTraitors?.pending ||
    (!!game.decision && (game.decision.kind !== 'nexusIxianReplacement' ||
      game.decision.player !== offer.buyer || game.decision.event !== offer.event));
  const disabled = busy || game.status !== 'playing' || game.phase !== 3 || priorityBlocked ||
    !!game.roomControl?.paused || !!game.roomControl?.closed || !!own?.autopilot;
  const ownIxianMode = game.nexusCards?.card === 'ixians' && own
    ? nexusCardMode('ixians', own.faction, game.players.map((player) => player.faction))
    : undefined;

  return (
    <section aria-label="Purchased card choice" data-testid="nexus-ixian-replacement" className="notice min-w-0 space-y-3">
      <h3>Purchased card choice</h3>
      <p>{buyer?.name ?? 'The buyer'} chooses whether to keep the completed purchase before the original continuation resumes.</p>
      <p className="fine">
        This neutral development-preview boundary is offered independently of the buyer’s private Nexus face.
        Only the buyer can choose. The original payment stays paid; this is not another purchase or auction.{' '}
        <a href="/rules?topic=nexus-ixian-replacement#nexus-ixian-replacement">Purchased-card timing and preview limits</a>
      </p>
      {(offer.origin === 'cache' || offer.origin === 'richeseSpecial') && (
        <p className="fine">
          Provisional cache scope: this independent absent-Ixian Nexus grant applies to a genuine
          cache purchase. The separate exclusion for the native Ixian ally advantage is unchanged.
        </p>
      )}
      {offer.origin === 'richeseSpecial' && (
        <p className="fine">
          The original Karama cost, three-spice payment and once-game power are already committed.
          This choice resumes the original income and controls; it creates no new auction or payment.
        </p>
      )}
      {buyer?.faction === 'harkonnen' && (
        <p className="fine">
          Provisional Harkonnen order: choose this replacement before the original income and
          bonus-card responses. Replacement is not another purchase: it grants no second bonus
          and does not open a bonus slot at your eight-card limit.
        </p>
      )}
      {canRespond && offer.purchased && (
        <article aria-label="Your purchased Treachery Card" className="treachery-card">
          <h4>{offer.purchased.name}</h4>
          <CardRules card={offer.purchased} />
          <CardInspector card={offer.purchased} />
        </article>
      )}
      {game.nexusCards?.card === 'ixians' && (
        <div aria-label="Your private Ixian Nexus card">
          <NexusCardFace card="ixians" mode={ownIxianMode} />
          {canRespond && <p className="fine">
            Secret Ally requires you to be unallied with native Ixians absent. In this preview,
            eligible Use spends your Ixian Nexus and discards only the exact Treachery Card just purchased,
            then draws the actual next card from the Treachery Deck. It does not take an unsold auction card.
            If the deck is empty, the discard is reshuffled after your purchased card enters it;
            drawing that same physical card again is legal. Keeping retains both cards.
          </p>}
        </div>
      )}
      {!canRespond ? (
        <p aria-live="polite">Waiting for {buyer?.name ?? 'the buyer'}’s purchased card choice.</p>
      ) : (
        <>
          {offer.blocked && <p className="fine">{offer.blocked}</p>}
          <Button data-testid="nexus-ixian-replacement-pass" className="game-action min-h-11 whitespace-normal" disabled={disabled}
            onClick={() => { if (!disabled) act({ type: 'nexusIxianReplacementPass', event: offer.event }); }}>
            Keep purchased card
          </Button>
          {canUse && (
            <Button data-testid="nexus-ixian-replacement-use" className="game-action min-h-11 whitespace-normal" disabled={disabled}
              onClick={() => { if (!disabled) act({ type: 'nexusIxianReplacementUse', event: offer.event }); }}>
              Use Ixian Nexus · replace purchased card
            </Button>
          )}
        </>
      )}
    </section>
  );
}