/** Trump card drawn in SVG (no image assets). Big corner index for readability on PC and phones. */
import type { CSSProperties } from 'react';

const SUIT_SYMBOL: Record<string, string> = { S: '♠', H: '♥', D: '◆', C: '♣' };
const SUIT_KO: Record<string, string> = { S: '스페이드', H: '하트', D: '다이아', C: '클로버' };
const RANK_LABEL: Record<string, string> = { T: '10', J: 'J', Q: 'Q', K: 'K', A: 'A' };
const FACE_KO: Record<string, string> = { J: '잭', Q: '퀸', K: '킹', A: '에이스' };

export type CardSize = 'sm' | 'md' | 'lg';
const WIDTH: Record<CardSize, number> = { sm: 44, md: 64, lg: 88 };

export interface PlayingCardProps {
  /** e.g. "AS", "TD", "X1" (joker). null = face down. */
  card: string | null;
  size?: CardSize;
  selected?: boolean;
  dimmed?: boolean;
  highlight?: boolean;
  onClick?: () => void;
  title?: string;
  style?: CSSProperties;
  /** Colour-blind friendly: 4-colour suits. */
  fourColor?: boolean;
}

export function cardAria(card: string | null): string {
  if (!card) return '뒤집힌 카드';
  if (card.startsWith('X')) return '조커';
  const r = card[0]!;
  return `${SUIT_KO[card[1]!]} ${FACE_KO[r] ?? RANK_LABEL[r] ?? r}`;
}

export function PlayingCard({ card, size = 'md', selected, dimmed, highlight, onClick, title, style, fourColor }: PlayingCardProps) {
  const w = WIDTH[size];
  const h = Math.round(w * 1.4);
  const lift = selected ? -Math.round(w * 0.22) : 0;
  const common: CSSProperties = {
    width: w,
    height: h,
    flex: 'none',
    transform: `translateY(${lift}px)`,
    transition: 'transform 0.12s ease',
    cursor: onClick ? 'pointer' : 'default',
    opacity: dimmed ? 0.45 : 1,
    filter: highlight ? 'drop-shadow(0 0 6px #f59e0b)' : 'drop-shadow(0 1px 2px rgba(0,0,0,0.25))',
    ...style,
  };
  const Tag = onClick ? 'button' : 'span';
  const btnReset: CSSProperties = onClick ? { padding: 0, border: 0, background: 'none' } : {};
  if (!card) {
    return (
      <Tag style={{ ...common, ...btnReset }} onClick={onClick} aria-label={title ?? '뒤집힌 카드'} title={title}>
        <svg viewBox="0 0 100 140" width={w} height={h} aria-hidden>
          <rect x="1" y="1" width="98" height="138" rx="9" fill="#1e3a8a" stroke="#fff" strokeWidth="3" />
          <rect x="9" y="9" width="82" height="122" rx="6" fill="none" stroke="#93c5fd" strokeWidth="2" />
          <path d="M50 30 L70 70 L50 110 L30 70 Z" fill="#3b82f6" opacity="0.7" />
        </svg>
      </Tag>
    );
  }
  const joker = card.startsWith('X');
  const suit = card[1]!;
  const rank = card[0]!;
  const color = joker
    ? card === 'X1' ? '#111827' : '#dc2626'
    : fourColor
      ? { S: '#111827', H: '#dc2626', D: '#2563eb', C: '#15803d' }[suit]!
      : suit === 'H' || suit === 'D'
        ? '#dc2626'
        : '#111827';
  const label = joker ? '★' : (RANK_LABEL[rank] ?? rank);
  const sym = joker ? '' : SUIT_SYMBOL[suit];
  return (
    <Tag style={{ ...common, ...btnReset }} onClick={onClick} aria-label={title ?? cardAria(card)} aria-pressed={onClick ? !!selected : undefined} title={title}>
      <svg viewBox="0 0 100 140" width={w} height={h} aria-hidden>
        <rect x="1" y="1" width="98" height="138" rx="9" fill="#fffef9" stroke={selected ? '#2563eb' : '#9ca3af'} strokeWidth={selected ? 5 : 2} />
        <text x="9" y="33" fontSize="30" fontWeight="800" fill={color} fontFamily="Pretendard Variable, sans-serif">
          {label}
        </text>
        <text x="11" y="60" fontSize="26" fill={color}>
          {sym}
        </text>
        {joker ? (
          <text x="50" y="98" fontSize="22" fontWeight="800" textAnchor="middle" fill={color}>
            JOKER
          </text>
        ) : 'JQK'.includes(rank) ? (
          <>
            <rect x="30" y="44" width="56" height="78" rx="6" fill={color} opacity="0.1" />
            <text x="58" y="100" fontSize="44" fontWeight="800" textAnchor="middle" fill={color}>
              {rank}
            </text>
          </>
        ) : (
          <text x="60" y="108" fontSize="54" textAnchor="middle" fill={color}>
            {sym}
          </text>
        )}
      </svg>
    </Tag>
  );
}