import ScoreChips from './ScoreChips';
import { useIsMobile } from '../../../../hooks/useIsMobile';

const COL_TIPS = {
  rank: '순위 — 종합 점수가 높은 순서',
  name: '종목명과 종목 코드',
  total: '종합 점수 (0~100) — 활성 점수 노드들의 가중평균. 가중치는 좌측 패널에서 조정',
  nodes: '노드별 점수 칩 — 70점 이상이면 노란색 강조. 각 칩에 마우스 올리면 해당 노드 설명이 나옵니다',
  entry: '예상 진입가 (원) — 현재 종가의 +0.5%, 다음날 시초가 슬리피지 가정',
  stop: '손절가 (원) — 현재가 - 2 × ATR(14, Wilder smoothing). 변동성 기반 손절',
  target: '익절가 (원) — 진입가 + (진입가 - 손절가) × R:R 비율 (기본 2.0). 위험 1 대비 보상 2',
  r_pct: '손실 위험 % — (진입가 - 손절가) / 진입가 × 100. 클수록 변동성 큰 종목',
  delta_rank: '비교 대상 대비 순위 변화 — ▲(상승)·▼(하락)·NEW(이번에 새로 진입)·OUT(비교 대상에만 있음)',
  delta_score: '비교 대상 대비 점수 변화 — 양수면 상승',
};

function Th({ k, children }) {
  return (
    <th title={COL_TIPS[k]} style={{ cursor: 'help' }}>
      {children}
      <span style={{ marginLeft: 4, fontSize: 10, color: '#6b7280' }}>ⓘ</span>
    </th>
  );
}

function buildCompareIndex(compareWith) {
  if (!compareWith?.results) return null;
  const idx = new Map();
  for (const r of compareWith.results) idx.set(r.ticker, r);
  return idx;
}

function DeltaRank({ current, prev }) {
  if (!prev) {
    return <span style={{ color: '#22c55e', fontSize: 11, fontWeight: 600 }}>NEW</span>;
  }
  const diff = prev.rank - current.rank;
  if (diff === 0) return <span style={{ color: '#9ca3af', fontSize: 11 }}>─</span>;
  const up = diff > 0;
  return (
    <span style={{ color: up ? '#22c55e' : '#ef4444', fontSize: 11 }}>
      {up ? '▲' : '▼'} {Math.abs(diff)}
    </span>
  );
}

function DeltaScore({ current, prev }) {
  if (!prev) return <span style={{ color: '#9ca3af', fontSize: 11 }}>-</span>;
  const d = (current.total_score ?? 0) - (prev.total_score ?? 0);
  if (Math.abs(d) < 0.1) return <span style={{ color: '#9ca3af', fontSize: 11 }}>─</span>;
  const up = d > 0;
  return (
    <span style={{ color: up ? '#22c55e' : '#ef4444', fontSize: 11 }}>
      {up ? '+' : ''}{d.toFixed(1)}
    </span>
  );
}

function MobileCard({ r, prev, hasCompare }) {
  return (
    <div className="screener-mcard">
      <div className="screener-mcard-head">
        <div className="screener-mcard-rank">#{r.rank}</div>
        <div className="screener-mcard-name">
          <div className="screener-mcard-name-main">{r.name}</div>
          <div className="screener-mcard-name-sub">{r.ticker}</div>
        </div>
        <div className="screener-mcard-score">
          <div className="screener-mcard-score-val">{r.total_score?.toFixed(1)}</div>
          <div className="screener-mcard-score-lbl">총점</div>
        </div>
      </div>
      {hasCompare && (
        <div className="screener-mcard-delta">
          <span>순위 <DeltaRank current={r} prev={prev} /></span>
          <span>점수 <DeltaScore current={r} prev={prev} /></span>
        </div>
      )}
      <div className="screener-mcard-chips">
        <ScoreChips scores={r.scores} />
      </div>
      <div className="screener-mcard-prices">
        <div><span className="lbl">진입</span><span>{r.entry_price?.toLocaleString?.()}원</span></div>
        <div><span className="lbl">손절</span><span>{r.stop_price?.toLocaleString?.()}원</span></div>
        <div><span className="lbl">익절</span><span>{r.target_price?.toLocaleString?.()}원</span></div>
        <div><span className="lbl">위험</span><span>{r.r_pct?.toFixed?.(1)}%</span></div>
      </div>
    </div>
  );
}

function MobileOutCard({ r }) {
  return (
    <div className="screener-mcard" style={{ opacity: 0.55 }}>
      <div className="screener-mcard-head">
        <div className="screener-mcard-rank">
          <span style={{ color: '#ef4444', fontWeight: 600 }}>OUT</span>
        </div>
        <div className="screener-mcard-name">
          <div className="screener-mcard-name-main">{r.name}</div>
          <div className="screener-mcard-name-sub">{r.ticker}</div>
        </div>
        <div className="screener-mcard-score">
          <div className="screener-mcard-score-val">{r.total_score?.toFixed(1)}</div>
          <div className="screener-mcard-score-lbl">이전</div>
        </div>
      </div>
      <div className="screener-mcard-chips">
        <ScoreChips scores={r.scores} />
      </div>
    </div>
  );
}

export default function ResultTable({ result, compareWith, compareLabel }) {
  const isMobile = useIsMobile();

  if (!result) {
    return (
      <section className="screener-card">
        <p style={{ color: '#9ca3af' }}>아직 결과 없음. "지금 실행"을 눌러보세요.</p>
        <p style={{ color: '#6b7280', fontSize: 12, marginTop: 8 }}>
          💡 컬럼/칩에 마우스를 올리면 의미가 표시됩니다 (PC).
        </p>
      </section>
    );
  }

  const cmpIdx = buildCompareIndex(compareWith);
  const hasCompare = !!cmpIdx;
  const currentTickers = new Set((result.results || []).map((r) => r.ticker));
  const onlyInCompare = hasCompare
    ? (compareWith.results || []).filter((r) => !currentTickers.has(r.ticker))
    : [];

  return (
    <section className="screener-card">
      <div className="screener-result-head">
        <h3 style={{ margin: 0 }}>
          Top {result.top_n} · 통과 {result.survivors_count} · {result.asof}
          {hasCompare && (
            <span style={{ marginLeft: 8, fontSize: 12, color: '#fbbf24' }}>
              vs {compareLabel ?? '비교 대상'} (통과 {compareWith.survivors_count})
            </span>
          )}
        </h3>
        {result.warnings?.length > 0 && (
          <div className="screener-warn">
            ⚠ {result.warnings.join(' · ')}
          </div>
        )}
      </div>

      <p style={{ color: '#6b7280', fontSize: 11, marginTop: 8, marginBottom: 0 }}>
        {isMobile
          ? `💡 종목 카드를 위아래로 스크롤하며 확인${hasCompare ? ' · 비교 모드 ON' : ''}`
          : `💡 컬럼/칩에 마우스를 올리면 의미가 표시됩니다${hasCompare ? ' · 비교 모드 ON — ▲▼NEW/OUT 변화 표시' : ''}`}
      </p>

      {isMobile ? (
        <div className="screener-mobile-list">
          {(result.results || []).map((r) => (
            <MobileCard key={r.ticker} r={r} prev={cmpIdx?.get(r.ticker)} hasCompare={hasCompare} />
          ))}
          {hasCompare && onlyInCompare.length > 0 && (
            <>
              <div className="screener-out-divider">── 이번엔 빠진 종목 ──</div>
              {onlyInCompare.map((r) => <MobileOutCard key={`out-${r.ticker}`} r={r} />)}
            </>
          )}
        </div>
      ) : (
        <div style={{ overflowX: 'auto', marginTop: 12 }}>
          <table className="screener-table">
            <thead>
              <tr>
                <Th k="rank">#</Th>
                <Th k="name">종목</Th>
                <Th k="total">총점</Th>
                {hasCompare && <Th k="delta_rank">순위Δ</Th>}
                {hasCompare && <Th k="delta_score">점수Δ</Th>}
                <Th k="nodes">노드</Th>
                <Th k="entry">진입(원)</Th>
                <Th k="stop">손절(원)</Th>
                <Th k="target">익절(원)</Th>
                <Th k="r_pct">R%</Th>
              </tr>
            </thead>
            <tbody>
              {(result.results || []).map((r) => {
                const prev = cmpIdx?.get(r.ticker);
                return (
                  <tr key={r.ticker}>
                    <td>{r.rank}</td>
                    <td>{r.name}<br /><span style={{ fontSize: 11, color: '#9ca3af' }}>{r.ticker}</span></td>
                    <td style={{ fontWeight: 600 }}>{r.total_score?.toFixed(1)}</td>
                    {hasCompare && <td><DeltaRank current={r} prev={prev} /></td>}
                    {hasCompare && <td><DeltaScore current={r} prev={prev} /></td>}
                    <td><ScoreChips scores={r.scores} /></td>
                    <td>{r.entry_price?.toLocaleString?.()}</td>
                    <td>{r.stop_price?.toLocaleString?.()}</td>
                    <td>{r.target_price?.toLocaleString?.()}</td>
                    <td>{r.r_pct?.toFixed?.(1)}</td>
                  </tr>
                );
              })}
              {hasCompare && onlyInCompare.length > 0 && (
                <>
                  <tr><td colSpan={10} style={{ fontSize: 11, color: '#6b7280', padding: '12px 8px 4px' }}>
                    ── 이번엔 빠진 종목 (비교 대상에만 존재) ──
                  </td></tr>
                  {onlyInCompare.map((r) => (
                    <tr key={`out-${r.ticker}`} style={{ opacity: 0.55 }}>
                      <td>—</td>
                      <td>{r.name}<br /><span style={{ fontSize: 11, color: '#9ca3af' }}>{r.ticker}</span></td>
                      <td style={{ fontWeight: 500 }}>{r.total_score?.toFixed(1)}</td>
                      <td><span style={{ color: '#ef4444', fontSize: 11, fontWeight: 600 }}>OUT</span></td>
                      <td>—</td>
                      <td><ScoreChips scores={r.scores} /></td>
                      <td colSpan={4}>—</td>
                    </tr>
                  ))}
                </>
              )}
            </tbody>
          </table>
        </div>
      )}
    </section>
  );
}