import { type ReactNode } from 'react';
import { Clock, Building2, Link2, CornerDownRight } from 'lucide-react';
import { DataTable } from '@/components/ui/data-table';
import { Typography, typographyVariants } from '@/components/ui/typography';
import { cn } from '@/lib/utils';
import { useQuotationChain } from '../hooks/useQuotationChain';
import {
  type Estimate,
  type Product,
  type ChainRoundState,
  quotationStatusLabel,
  quotationTypeLabel,
  chainRoundState,
  is1v1,
  CHAIN_ROUND_STATE_LABEL,
} from '../types';
import { QuotationStatus } from '@/api/generated/model';

type QuotationTableProps = {
  data: Estimate[];
  products: Product[];
  onOpenDetail: (id: string) => void;
  /** 견적번호 클릭 → 그 번호로 목록 필터(같은 체인의 차수만 모아 보기). */
  onFilterChain?: (number: string) => void;
  footer?: ReactNode;
  /** 툴바와 한 카드로 붙일 때 테이블 자체 테두리/라운드를 죽이는 용도 */
  className?: string;
};

const statusBadgeClass = (status?: number | null) => {
  switch (status) {
    case QuotationStatus.CREATED:
      return 'bg-yellow-50 text-yellow-700 border-yellow-300';
    case QuotationStatus.IN_PROGRESS:
      return 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/25 dark:text-emerald-400 border-emerald-300/40';
    case QuotationStatus.CLOSED:
      return 'bg-blue-50 text-blue-700 border-blue-300';
    default:
      return 'bg-zinc-100 text-zinc-600';
  }
};

// 마감결과 배지 색. 낙찰=초록 / 개찰(낙찰자 미정, 수동 처리)=주황 / 진행중=회색(아직 마감 전).
const outcomeBadgeClass = (state: ChainRoundState) => {
  switch (state) {
    case 'awarded':
      return 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/25 dark:text-emerald-400 border-emerald-300/50';
    case 'opened':
      return 'bg-amber-50 text-amber-700 dark:bg-amber-950/25 dark:text-amber-400 border-amber-300/50';
    default:
      return 'bg-zinc-100 text-zinc-500 dark:bg-zinc-800/40 dark:text-zinc-400 border-zinc-300/40';
  }
};

export function QuotationTable({ data, products, onOpenDetail, onFilterChain, footer, className }: QuotationTableProps) {
  return (
    <DataTable
      className={className}
      data={data}
      rowKey={(est) => est.id ?? ''}
      onRowClick={(est) => onOpenDetail(est.id ?? '')}
      empty="진행 중인 전자 견적 및 자동 협상 계약 내역이 존재하지 않습니다."
      footer={footer}
      columns={[
        {
          header: '견적건명',
          cell: (est) => {
            const product = products.find((p) => p.id === est.productId);
            const productName = product?.name ?? est.productName; // 목록에 없으면 서버 조인 상품명으로 폴백
            return (
              <div>
                <Typography as="span" variant="small" className="block font-bold">
                  {est.title}
                </Typography>
                <Typography as="span" variant="small" className="mt-0.5 flex items-center gap-1.5 text-[10px] font-mono text-muted-foreground">
                  <Building2 size={10} />
                  대상 상품: {productName ?? '확인 불가'} (₩{(product?.price ?? 0).toLocaleString()})
                </Typography>
                {/* 이 견적에서 재생성된 다음 차수(직속 자식)만 행 밑에 표시 — 전체 체인 반복 X */}
                <RegeneratedChild number={est.number} currentQtId={est.id} onOpenRound={onOpenDetail} />
              </div>
            );
          },
        },
        {
          header: '견적번호',
          cellClassName: 'font-mono text-muted-foreground',
          cell: (est) =>
            onFilterChain && est.number ? (
              <button
                type="button"
                onClick={(e) => {
                  e.stopPropagation(); // 행 클릭(상세 열기) 대신 체인 필터만
                  onFilterChain(est.number!);
                }}
                title="이 견적번호의 모든 차수만 보기"
                className={cn(typographyVariants({ variant: 'link' }), 'inline-flex items-center gap-1')}
              >
                <Link2 size={11} className="opacity-60" />
                <Typography as="span" variant="small" className="text-xs text-inherit">{est.number}</Typography>
              </button>
            ) : (
              <Typography as="span" variant="small" className="text-xs text-inherit">{est.number}</Typography>
            ),
        },
        {
          header: '유형',
          align: 'center',
          // 유형은 고정 속성이라 pill 대신 평문 — 협상(1:1)만 살짝 진하게, 경매(1:N)는 연하게.
          cell: (est) => (
            <Typography
              as="span"
              variant="small"
              className={cn('text-xs', is1v1(est.type) ? 'font-semibold text-foreground' : 'text-muted-foreground')}
            >
              {quotationTypeLabel(est.type)}
            </Typography>
          ),
        },
        {
          header: '차수',
          align: 'center',
          cell: (est) => (
            <Typography as="span" variant="small" className="text-sm font-mono font-bold text-foreground">
              {est.round}차
            </Typography>
          ),
        },
        {
          header: '견적상태',
          align: 'center',
          cell: (est) => (
            <Typography
              as="span"
              variant="small"
              className={`inline-flex items-center gap-1 px-2.5 py-0.5 text-[10px] font-semibold rounded-full border ${statusBadgeClass(est.status)}`}
            >
              {quotationStatusLabel(est.status)}
            </Typography>
          ),
        },
        {
          header: '마감결과',
          align: 'center',
          // 상세 마감사유는 상세 드로어에서만. 목록은 거친 결과(낙찰/재생성/결렬/진행중)만,
          // 낙찰이면 배지에 '낙찰 - 낙찰사명' 한 줄로 붙인다.
          cell: (est) => {
            const state = chainRoundState(est);
            const winner = state === 'awarded' ? est.preferred_sp_name : null;
            return (
              <Typography
                as="span"
                variant="small"
                className={`inline-flex max-w-[180px] items-center px-2.5 py-0.5 text-[10px] font-semibold rounded-full border ${outcomeBadgeClass(state)}`}
                title={winner ?? undefined}
              >
                <span className="truncate">
                  {CHAIN_ROUND_STATE_LABEL[state]}
                  {winner ? ` - ${winner}` : ''}
                </span>
              </Typography>
            );
          },
        },
        {
          header: '마감기한',
          cellClassName: 'font-mono text-muted-foreground whitespace-nowrap',
          cell: (est) => (
            <div className="flex items-center gap-1.5">
              <Clock size={12} />
              <Typography as="span" variant="small" className="text-xs text-inherit">{est.dueDate}</Typography>
            </div>
          ),
        },
        {
          header: '생성일',
          cellClassName: 'font-mono text-muted-foreground whitespace-nowrap',
          cell: (est) => (
            <Typography as="span" variant="small" className="text-xs text-inherit">{est.createdDate ?? '-'}</Typography>
          ),
        },
        {
          header: '작성자',
          align: 'center',
          cellClassName: 'text-muted-foreground whitespace-nowrap',
          cell: (est) => (
            <Typography as="span" variant="small" className="text-xs text-inherit">{est.creatorName ?? '-'}</Typography>
          ),
        },
        {
          header: '협력사수',
          align: 'center',
          cellClassName: 'font-mono font-bold text-foreground',
          cell: (est) => (
            <Typography as="span" variant="small" className="text-xs text-inherit">{est.participationCount}개사</Typography>
          ),
        },
      ]}
    />
  );
}
function RegeneratedChild({
  number,
  currentQtId,
  onOpenRound,
}: {
  number?: string | null;
  currentQtId?: string;
  onOpenRound: (qtId: string) => void;
}) {
  const { rounds } = useQuotationChain(number);
  const current = rounds.find((r) => r.qt_id === currentQtId);
  // rounds 는 round 오름차순 → 현재보다 큰 첫 라운드가 직속 자식.
  const child = current ? rounds.find((r) => r.round > current.round) : undefined;
  if (!child) return null;

  return (
    <div className="mt-1.5 flex items-center gap-1.5">
      <CornerDownRight size={11} className="text-muted-foreground/50 shrink-0" />
      <Typography as="span" variant="small" className="text-[10px] font-mono text-muted-foreground">
        재생성됨
      </Typography>
      <button
        type="button"
        title={`${child.round}차 견적 · ${CHAIN_ROUND_STATE_LABEL[child.state]}`}
        onClick={(e) => {
          e.stopPropagation(); // 행 클릭(현재 견적 상세)과 분리
          onOpenRound(child.qt_id);
        }}
        className="inline-flex items-center rounded-full border border-border bg-muted px-2 py-0.5 text-foreground hover:bg-muted-foreground/15 cursor-pointer transition-colors"
      >
        <Typography as="span" variant="small" className="text-[10px] font-mono font-bold text-inherit">
          {child.round}차 · {CHAIN_ROUND_STATE_LABEL[child.state]}
        </Typography>
      </button>
    </div>
  );
}