import type { ReactNode } from 'react';
import { BadgeCheck, TrendingDown, TrendingUp } from 'lucide-react';
import { Card } from '@/components/ui/card';
import { Typography } from '@/components/ui/typography';
import { cn } from '@/lib/utils';
import type { QuotationData } from '@/api/generated/model/quotationData';
import { StatusPill, type PillTone } from './StatusPill';
import { PricingSpectrum } from './PricingSpectrum';
import {
  buildQuotationResult,
  CHAIN_ROUND_STATE_LABEL,
  type ChainRoundState,
  type SessionView,
} from '../../types';

const won = (n?: number | null) => (n != null ? `₩${n.toLocaleString()}` : '-');

// 결과 상태별 배지 톤(협상현황 pill 팔레트 재사용).
const OUTCOME_TONE: Record<ChainRoundState, PillTone> = {
  awarded: 'emerald',
  regenerated: 'amber',
  failed: 'blue',
  active: 'zinc',
};

/** 견적 결과 요약 밴드 — 마감 사유/낙찰 협력사 + 절감, 하단에 단가 조정 흐름 스펙트럼(최고·최저 투찰가/목표가). */
export function ResultSummaryBand({
  quotation,
  sessionViews,
}: {
  quotation: QuotationData;
  sessionViews: SessionView[];
}) {
  const r = buildQuotationResult(quotation, sessionViews);
  const good = r.savings != null && r.savings >= 0;
  const pct = r.savingsRate != null ? `${Math.abs(r.savingsRate * 100).toFixed(1)}%` : null;
  const SavingsIcon = good ? TrendingDown : TrendingUp;

  return (
    <Card className="p-2.5 gap-2 rounded shadow-xs border-border/80 flex flex-col">
      {/* 결과/사유 + 낙찰 협력사 + 절감 */}
      <div className="flex items-center justify-between gap-2">
        <div className="flex items-center gap-2 min-w-0">
          <StatusPill tone={OUTCOME_TONE[r.outcome]}>{CHAIN_ROUND_STATE_LABEL[r.outcome]}</StatusPill>
          {/* 낙찰 건은 협력사명을 주줄로(사유 '낙찰'은 pill 과 중복이라 생략), 그 외엔 마감사유를 표기. */}
          {r.winnerName ? (
            <div className="min-w-0">
              <Typography as="p" variant="caption" className="text-[10px] leading-tight text-muted-foreground">
                낙찰 협력사
              </Typography>
              <Typography
                as="p"
                variant="small"
                className="flex items-center gap-1 text-[12px] font-bold font-sans text-foreground truncate"
              >
                <BadgeCheck size={13} className="text-emerald-600 shrink-0" />
                {r.winnerName}
              </Typography>
            </div>
          ) : (
            <Typography as="p" variant="small" className="text-[12px] font-bold truncate min-w-0">
              {r.closeReason}
            </Typography>
          )}
        </div>

        <Stat label={r.provisional ? '예상 절감' : '목표가 대비'}>
          {r.savings == null ? (
            <Typography as="span" variant="small" className="font-mono text-muted-foreground text-[13px]">
              -
            </Typography>
          ) : (
            <Typography
              as="span"
              variant="small"
              className={cn(
                'inline-flex items-center gap-1 font-mono font-bold text-[13px]',
                good ? 'text-emerald-600' : 'text-amber-600',
              )}
            >
              <SavingsIcon size={13} />
              {good ? '' : '−'}
              {won(Math.abs(r.savings))}
              {pct ? ` (${pct})` : ''}
            </Typography>
          )}
        </Stat>
      </div>

      {/* 단가 조정 흐름 스펙트럼: 최고 투찰가 → 최저 투찰가 · 목표가 */}
      <PricingSpectrum targetPrice={r.targetPrice} lowestBid={r.lowestBid} highestBid={r.highestBid} />
    </Card>
  );
}

/** 밴드 안의 라벨/값 한 칸. */
function Stat({ label, sub, children }: { label: string; sub?: string; children: ReactNode }) {
  return (
    <div className="flex flex-col justify-center rounded border border-border bg-muted/30 px-3 py-1.5 min-w-[108px]">
      <Typography as="span" variant="caption" className="text-[10px] leading-tight">
        {label}
        {sub ? ` · ${sub}` : ''}
      </Typography>
      {children}
    </div>
  );
}