import { useState } from 'react';
import { X, RefreshCw, Loader2 } from 'lucide-react';
import { useScrollLock } from '@/lib/useScrollLock';
import { Button } from '@/components/ui/button';
import { Typography } from '@/components/ui/typography';
import { type Partner, sessionStatusLabel } from '../../types';

type RegenerateModalProps = {
  open: boolean;
  /** 현재 견적에 연결된 공급사만. */
  partners: Partner[];
  /** 공급사별 협상 단계(세션 상태 코드) — 행에 함께 표시. */
  sessionStatusBySupplier?: Record<string, number>;
  /** 기본 선택 = 원 라운드의 공급사들. */
  defaultSupplierIds: string[];
  /** 확정 → 재생성 호출. 성공(true) 시 모달 닫힘. */
  onConfirm: (supplierIds: string[]) => Promise<boolean> | boolean;
  onClose: () => void;
};

// 마감된 견적의 '다음 라운드'를 만들 때 부를 공급사를 고르는 모달.
// 상품·견적번호·협상기간·카드는 원 견적에서 이어받으므로 여기선 공급사만 선택한다.
export function RegenerateModal({ open, partners, sessionStatusBySupplier, defaultSupplierIds, onConfirm, onClose }: RegenerateModalProps) {
  useScrollLock(open); // 모달 열린 동안 배경(부모) 스크롤 잠금
  const [selected, setSelected] = useState<string[]>(defaultSupplierIds);
  const [submitting, setSubmitting] = useState(false);
  if (!open) return null;

  const toggle = (id: string) =>
    setSelected((prev) => (prev.includes(id) ? prev.filter((p) => p !== id) : [...prev, id]));

  // 공급사 1곳=재협상(1:1), 여러 곳=재견적(1:N) — 백엔드 타입 자동결정과 동일하게 미리 안내.
  const nextTypeLabel = selected.length <= 1 ? '재협상 (1:1)' : '재견적 (1:N)';

  const handle = async () => {
    if (submitting || selected.length === 0) return;
    setSubmitting(true);
    try {
      const ok = await onConfirm(selected);
      if (ok) onClose();
    } finally {
      setSubmitting(false);
    }
  };

  return (
    <div className="fixed inset-0 z-[55] flex items-center justify-center p-4 bg-black/40 backdrop-blur-xs">
      <div className="w-full max-w-xl bg-card border border-border rounded-lg shadow-2xl p-6 max-h-[90vh] overflow-y-auto animate-scale-up font-mono">
        {/* Header */}
        <div className="flex items-center justify-between pb-4 border-b border-border">
          <div className="flex items-center gap-2">
            <RefreshCw className="text-foreground" size={16} />
            <Typography variant="small" className="font-bold">다음 견적 재생성</Typography>
          </div>
          <button onClick={onClose} className="p-1 rounded text-muted-foreground hover:bg-muted cursor-pointer">
            <X size={18} />
          </button>
        </div>

        {/* Body */}
        <div className="my-4 space-y-3 text-xs">
          <Typography as="span" variant="small" className="text-muted-foreground block leading-relaxed">
            상품 · 견적번호 · 협상기간 · 카드는 이 견적에서 이어받습니다. 다음 견적에 부를 공급사만 고르세요.
          </Typography>
          <div className="border border-border rounded overflow-hidden max-h-56 overflow-y-auto divide-y divide-border bg-background">
            {partners.map((part) => {
              const isChecked = selected.includes(part.id ?? '');
              return (
                <label
                  key={part.id}
                  className="flex items-center justify-between gap-2.5 p-3 hover:bg-muted/30 cursor-pointer transition-colors"
                >
                  <div className="flex items-center gap-2.5 min-w-0">
                    <input
                      type="checkbox"
                      checked={isChecked}
                      onChange={() => toggle(part.id ?? '')}
                      className="accent-primary h-4 w-4 shrink-0"
                    />
                    <div className="min-w-0">
                      <Typography as="span" variant="small" className="font-semibold block truncate">{part.name}</Typography>
                      <Typography as="span" variant="small" className="text-muted-foreground">
                        이메일: {part.managerEmail}
                      </Typography>
                    </div>
                  </div>
                  {sessionStatusBySupplier?.[part.id ?? ''] != null && (
                    <span className="shrink-0 text-[9px] font-mono px-1.5 py-0.5 rounded-full border border-border bg-muted text-muted-foreground">
                      {sessionStatusLabel(sessionStatusBySupplier[part.id ?? ''])}
                    </span>
                  )}
                </label>
              );
            })}
          </div>
          <div className="flex items-center justify-between text-[11px] text-muted-foreground">
            <span>선택: <b className="text-foreground">{selected.length}</b>곳</span>
            <span>유형: <b className="text-foreground">{nextTypeLabel}</b></span>
          </div>
        </div>

        {/* Footer */}
        <div className="flex justify-end gap-2 pt-4 border-t border-border">
          <Button type="button" variant="outline" size="sm" onClick={onClose}>취소</Button>
          <Button type="button" size="sm" onClick={handle} disabled={submitting || selected.length === 0}>
            {submitting ? (
              <>
                <Loader2 className="animate-spin mr-1" size={14} />
                생성 중…
              </>
            ) : (
              '다음 견적 생성'
            )}
          </Button>
        </div>
      </div>
    </div>
  );
}