/** 방에서 사람 이름을 누르면 뜨는 기록 카드 (docs/06 §5): 이 게임의 판·승·패·무와 전체 합계. */
import { useEffect, useState, type ReactNode } from 'react';
import { createPortal } from 'react-dom';
import { isBotId, type MyGameSummary, type PublicUser } from '@bg/shared/lite';
import { api, type GameStat } from '../net/api';
import { Avatar, Sheet } from './ui';
import { gameName } from './GameNotice';

/** 패 = 끝까지 한 판 - 승 - 무 (1등이 아니면 패로 센다). */
export function record(s: Pick<GameStat, 'played' | 'wins' | 'draws'>) {
  const losses = Math.max(0, s.played - s.wins - s.draws);
  const rate = s.played ? Math.round((s.wins / s.played) * 100) : null;
  return { played: s.played, wins: s.wins, draws: s.draws, losses, rate };
}

export function sumStats(stats: GameStat[]) {
  return stats.reduce((t, s) => ({ played: t.played + s.played, wins: t.wins + s.wins, draws: t.draws + s.draws }), { played: 0, wins: 0, draws: 0 });
}

export function recordText(s: Pick<GameStat, 'played' | 'wins' | 'draws'>): string {
  const r = record(s);
  return `${r.played}판 ${r.wins}승 ${r.losses}패 ${r.draws}무${r.rate !== null ? ` (승률 ${r.rate}%)` : ''}`;
}

/** One finished game from the player's side (내 게임 기록, 관리자 사용자 기록). */
export function resultLabel(g: MyGameSummary): string {
  if (g.endReason === 'void') return '무효';
  if (g.myRank === null) return '끝남';
  if (g.players.length === 1) return '혼자 했어요';
  if (g.players.every((p) => p.rank === 1)) return '무승부';
  if (g.players.length === 2) return g.myRank === 1 ? '이겼어요' : '졌어요';
  return `${g.myRank}등`;
}

/** A player's name that opens their record card. Computer players are plain text. */
export function PlayerName({ user, gameId, session, children }: { user: PublicUser; gameId: string; session?: { played: number; wins: number }; children?: ReactNode }) {
  const [open, setOpen] = useState(false);
  if (isBotId(user.id)) return <>{children ?? user.nickname}</>;
  return (
    <>
      <button type="button" className="name-btn" onClick={() => setOpen(true)} aria-label={`${user.nickname} 기록 보기`}>
        {children ?? user.nickname}
      </button>
      {/* Portal: the name sits in one-line, bold text that the card must not inherit. */}
      {open && createPortal(<PlayerCard user={user} gameId={gameId} session={session} onClose={() => setOpen(false)} />, document.body)}
    </>
  );
}

function PlayerCard({ user, gameId, session, onClose }: { user: PublicUser; gameId: string; session?: { played: number; wins: number }; onClose: () => void }) {
  const [stats, setStats] = useState<GameStat[] | null>(null);
  const [error, setError] = useState<string | null>(null);
  useEffect(() => {
    api.userStats(user.id).then(
      (r) => setStats(r.stats),
      (e) => setError((e as Error).message),
    );
  }, [user.id]);
  const name = gameName(gameId);
  const here = stats ? record(stats.find((s) => s.gameId === gameId) ?? { played: 0, wins: 0, draws: 0 }) : null;
  const total = stats ? sumStats(stats) : null;
  return (
    <Sheet onClose={onClose} label={`${user.nickname} 기록`}>
      <div className="row" style={{ gap: 12, flexWrap: 'nowrap' }}>
        <Avatar user={user} size={52} />
        <div style={{ minWidth: 0 }}>
          <h2 style={{ overflow: 'hidden', textOverflow: 'ellipsis' }}>{user.nickname}</h2>
          <span className="badge">{user.kind === 'member' ? '디스코드 회원' : '게스트'}</span>
        </div>
      </div>
      {error ? (
        <p className="field-error">{error}</p>
      ) : !here || !total ? (
        <p className="muted">기록을 불러오는 중…</p>
      ) : (
        <>
          <section className="stack" style={{ gap: 8 }} aria-label={`${name} 기록`}>
            <strong>{name} 기록</strong>
            {here.played === 0 ? (
              <p className="muted">아직 이 게임을 끝까지 한 적이 없어요.</p>
            ) : (
              <div className="record-grid">
                <RecordCell label="판" value={here.played} />
                <RecordCell label="승" value={here.wins} />
                <RecordCell label="패" value={here.losses} />
                <RecordCell label="무" value={here.draws} />
                <RecordCell label="승률" value={`${here.rate}%`} />
              </div>
            )}
          </section>
          {session && session.played > 0 && (
            <p className="small">
              이 방에서 {session.played}판 {session.wins}승
            </p>
          )}
          <p className="muted small">전체 게임 {total.played ? recordText(total) : '기록 없음'}</p>
          {user.kind === 'guest' && <p className="muted small">게스트 기록은 사이트에 들어오지 않은 채 하루가 지나면 계정과 함께 지워져요.</p>}
        </>
      )}
      <button className="btn btn-secondary btn-block" onClick={onClose}>
        닫기
      </button>
    </Sheet>
  );
}

export function RecordCell({ label, value }: { label: string; value: number | string }) {
  return (
    <div className="record-cell">
      <span className="muted small">{label}</span>
      <strong>{value}</strong>
    </div>
  );
}