import React, { useState } from 'react';
import { ballClass, NumberRow, METHOD_META, METHOD_ORDER, SCORE_META, fmtKST } from '../lottoUtils';

const CombinedRecommendPanel = ({ combined, history, loading, histLoading, onRun, onCopy }) => {
    const [histExpand, setHistExpand] = useState(false);

    return (
        <section className="lotto-panel lotto-panel--wide lotto-combined">
            <div className="lotto-panel__head">
                <div>
                    <p className="lotto-panel__eyebrow">AI · 종합 추론</p>
                    <h3>종합 추론 번호 추천</h3>
                    <p className="lotto-panel__sub">
                        5가지 통계 기법(빈도·지문·갭·공동출현·다양성)을 가중 투표로 합산해
                        최적 6개 번호를 도출합니다.
                    </p>
                </div>
                <div className="lotto-panel__actions">
                    {loading && <span className="lotto-chip">분석 중…</span>}
                    <button className="button primary small" onClick={onRun} disabled={loading}>
                        {loading ? '추론 중…' : '🔮 종합 추론 실행'}
                    </button>
                    {history.length > 0 && (
                        <button className="button ghost small" onClick={() => setHistExpand(p => !p)}>
                            이력 {history.length}건 {histExpand ? '▲' : '▼'}
                        </button>
                    )}
                </div>
            </div>

            {!combined && !loading && (
                <p className="lotto-empty">버튼을 눌러 종합 추론을 실행하세요.</p>
            )}

            {combined && (
                <>
                    {/* 기법별 추천 번호 */}
                    <div className="lotto-combined__methods">
                        {METHOD_ORDER.map((key) => {
                            const meta = METHOD_META[key];
                            const m = combined.methods?.[key];
                            if (!m) return null;
                            return (
                                <div key={key} className="lotto-combined__method">
                                    <div className="lotto-combined__method-head">
                                        <span className="lotto-combined__method-icon">{meta.icon}</span>
                                        <div>
                                            <p className="lotto-combined__method-name" style={{ color: meta.color }}>
                                                {meta.label}
                                                <span className="lotto-combined__method-weight"> ({m.weight_pct}%)</span>
                                            </p>
                                            <p className="lotto-combined__method-desc">{meta.desc}</p>
                                        </div>
                                    </div>
                                    <div className="lotto-combined__method-nums">
                                        {m.numbers.map((n) => {
                                            const inFinal = combined.final_numbers.includes(n);
                                            return (
                                                <span
                                                    key={n}
                                                    className={`lotto-ball ${ballClass(n).replace('lotto-ball ', '')} ${inFinal ? 'is-final' : 'is-dim'}`}
                                                >
                                                    {n}
                                                </span>
                                            );
                                        })}
                                    </div>
                                </div>
                            );
                        })}
                    </div>

                    {/* 최종 추론 결과 */}
                    <div className="lotto-combined__final">
                        <div className="lotto-combined__final-head">
                            <span className="lotto-combined__final-badge">종합 추론 결과</span>
                            {combined.deduped && (
                                <span className="lotto-chip lotto-chip--muted">중복 (이미 저장됨)</span>
                            )}
                            <button className="button ghost small" onClick={() => onCopy(combined.final_numbers)}>
                                복사
                            </button>
                        </div>
                        <div className="lotto-combined__final-balls">
                            {combined.final_numbers.map((n) => {
                                const votes = combined.vote_counts?.[String(n)] ?? 0;
                                return (
                                    <div key={n} className="lotto-combined__final-ball-wrap">
                                        <span className={ballClass(n)}>{n}</span>
                                        <span className="lotto-combined__vote-dots">
                                            {Array.from({ length: 5 }).map((_, i) => (
                                                <span key={i} className={`lotto-combined__vote-dot ${i < votes ? 'is-on' : ''}`} />
                                            ))}
                                        </span>
                                    </div>
                                );
                            })}
                        </div>
                        <p className="lotto-combined__final-sub">
                            ● 점은 해당 번호가 채택된 기법 수 (최대 5개)
                        </p>
                    </div>

                    {/* 점수 바 */}
                    <div className="lotto-combined__scores">
                        <p className="lotto-combined__scores-title">조합 품질 점수</p>
                        {SCORE_META.map(({ key, label, color, weight }) => {
                            const val = combined.scores?.[key] ?? 0;
                            const pct = Math.round(val * 100);
                            return (
                                <div key={key} className="lotto-combined__score-row">
                                    <span className="lotto-combined__score-label">{label}</span>
                                    <span className="lotto-combined__score-weight">{weight}%</span>
                                    <div className="lotto-combined__score-bar-wrap">
                                        <div
                                            className="lotto-combined__score-bar"
                                            style={{ width: `${pct}%`, background: color }}
                                        />
                                    </div>
                                    <span className="lotto-combined__score-val">{pct}</span>
                                </div>
                            );
                        })}
                        <div className="lotto-combined__score-total">
                            종합 점수 <strong>{Math.round((combined.scores?.score_total ?? 0) * 100)}</strong> / 100
                        </div>
                    </div>

                    <p className="lotto-combined__disclaimer">
                        ※ 이 추천은 역대 통계 패턴 기반 참고 자료이며, 당첨을 보장하지 않습니다.
                    </p>
                </>
            )}

            {/* 추천 이력 */}
            {histExpand && (
                <div className="lotto-combined__history">
                    <p className="lotto-combined__history-title">종합 추론 이력</p>
                    {histLoading && <p className="lotto-empty">로딩 중…</p>}
                    {history.map((item) => (
                        <div key={item.id} className="lotto-combined__history-item">
                            <div className="lotto-combined__history-meta">
                                <span>#{item.id}</span>
                                <span>{fmtKST(item.created_at)}</span>
                                <span>기준 {item.based_on_draw ?? '-'}회</span>
                            </div>
                            <NumberRow nums={item.numbers} />
                            <button className="button ghost small" onClick={() => onCopy(item.numbers)}>복사</button>
                        </div>
                    ))}
                </div>
            )}
        </section>
    );
};

export default CombinedRecommendPanel;