import { Plus, BookOpen, Upload, Download, FileSpreadsheet, ChevronDown } from 'lucide-react';
import { useOverlayRouter } from '@/lib/useOverlayRouter';
import { showToast } from '@/lib/notify';
import { confirm } from '@/lib/confirm';
import { PageContainer } from '@/components/layout/PageContainer';
import { SearchInput } from '@/components/layout/PageToolbar';
import { Button } from '@/components/ui/button';
import { DropdownMenu, DropdownMenuTrigger, DropdownMenuContent, DropdownMenuItem } from '@/components/ui/dropdown-menu';
import { TablePagination } from '@/components/ui/table-pagination';
import { Typography } from '@/components/ui/typography';
import { useServerList } from '@/lib/useServerList';
import { useCards } from '@/features/cards/hooks/useCards';
import { useGetCard } from '@/api/generated/card/card';
import { CardTable } from '@/features/cards/components/CardTable';
import { CardFormSheet } from '@/features/cards/components/CardFormSheet';
import { CardExcelUploadModal, downloadCardTemplate } from '@/features/cards/components/CardExcelUploadModal';
import { mapCardData, type CardTab, type NegotiationCard } from '@/features/cards/types';
import type { ListCardsParams } from '@/api/generated/model/listCardsParams';

export default function CardsPage() {
  // 검색/탭/페이지 상태(재사용 훅) → 서버 쿼리 파라미터로 변환.
  const list = useServerList({ pageSize: 10, initialFilters: { tab: 'ALL' } });
  const activeTab = list.filters.tab as CardTab;
  const params: ListCardsParams = {
    search: list.debouncedSearch || undefined,
    is_wildcard: activeTab === 'ALL' ? undefined : activeTab === 'WILD',
    page: list.page,
    size: list.pageSize,
  };
  const { cards, total, totalNego, totalWild, createCard, updateCard, deleteCard, bulkCreate } = useCards(params);
  const totalPages = list.totalPages(total);

  // 오버레이(폼/엑셀)를 쿼리스트링으로 → 딥링크·뒤로가기·새로고침 지원.
  // ?detail=<id> 직접 접근 시 단건 API 로 받아 수정 폼을 연다(현재 페이지에 없어도 동작).
  const overlay = useOverlayRouter(['new', 'detail', 'modal']);
  const editId = overlay.get('detail');
  const modal = overlay.get('modal'); // 'excel' | null
  const editQuery = useGetCard(editId ?? '', { query: { enabled: !!editId } });
  const editing: NegotiationCard | null = editQuery.data?.card ? mapCardData(editQuery.data.card) : null;
  const formMode: 'create' | 'edit' = editId ? 'edit' : 'create';
  const isFormOpen = overlay.has('new') || !!editing;

  const openCreate = () => overlay.open('new');
  const openEdit = (card: NegotiationCard) => overlay.open('detail', card.id);

  const handleDeleteCard = async (id: string, cardName: string) => {
    if (await confirm({ title: '카드 삭제', description: `[${cardName}]을 삭제하시겠습니까?`, confirmText: '삭제', destructive: true })) {
      try {
        await deleteCard(id);
        showToast('삭제되었습니다.', 'info');
      } catch (err) {
        showToast(err instanceof Error ? err.message : '카드 삭제 실패', 'error');
      }
    }
  };

  const tabs: { id: CardTab; label: string; count: number }[] = [
    { id: 'ALL', label: '전체', count: totalNego + totalWild },
    { id: 'CARD', label: '협상카드', count: totalNego },
    { id: 'WILD', label: '와일드카드', count: totalWild },
  ];

  return (
    <PageContainer>
      {/* Upper Information Banner */}
      <div className="p-4 rounded-lg border border-border bg-card flex flex-col sm:flex-row items-center justify-between gap-4 font-mono text-xs">
        <div className="flex items-center gap-3">
          <BookOpen className="text-muted-foreground" size={20} />
          <div>
            <Typography variant="h3" className="text-xs">협상카드 및 와일드카드 관리</Typography>
            <Typography variant="muted" className="text-[10px] mt-0.5">
              우리 회사 카드와 기본 제공(공용) 카드를 함께 조회합니다. 공용 카드는 수정·삭제할 수 없습니다.
            </Typography>
          </div>
        </div>

        <div className="flex items-center gap-2">
          <DropdownMenu>
            <DropdownMenuTrigger render={<Button variant="outline" />}>
              <FileSpreadsheet />
              엑셀업로드
              <ChevronDown />
            </DropdownMenuTrigger>
            <DropdownMenuContent>
              <DropdownMenuItem onClick={() => overlay.open('modal', 'excel')}>
                <Upload />
                일괄 업로드
              </DropdownMenuItem>
              <DropdownMenuItem onClick={downloadCardTemplate}>
                <Download />
                양식 다운로드
              </DropdownMenuItem>
            </DropdownMenuContent>
          </DropdownMenu>

          <button
            id="card-register-btn"
            onClick={openCreate}
            className="flex items-center gap-2 px-4 py-2.5 bg-primary text-primary-foreground text-xs font-bold rounded hover:opacity-95 cursor-pointer transition-colors whitespace-nowrap"
          >
            <Plus size={15} />
            <span>신규 카드 등록</span>
          </button>
        </div>
      </div>

      {/* Primary Navigation Tab */}
      <div className="flex border-b border-border">
        {tabs.map((tab) => (
          <button
            key={tab.id}
            id={`card-tab-${tab.id.toLowerCase()}`}
            onClick={() => list.setFilter('tab', tab.id)}
            className={`py-2 px-6 font-bold text-xs tracking-tight border-b-2 transition-all cursor-pointer ${
              activeTab === tab.id
                ? 'border-primary text-primary'
                : 'border-transparent text-muted-foreground hover:text-foreground'
            }`}
          >
            {tab.label} ({tab.count})
          </button>
        ))}
      </div>

      {/* Filtering Search Bar */}
      <SearchInput
        id="card-search"
        value={list.search}
        onChange={(e) => list.setSearch(e.target.value)}
        onKeyDown={(e) => e.key === 'Enter' && list.submitSearch()}
        onClear={list.clearSearch}
        placeholder="전체 카드이름, 카드번호, 코드 검색..."
      />

      <CardTable
        data={cards}
        onEdit={openEdit}
        footer={
          <TablePagination
            page={list.page}
            totalPages={totalPages}
            totalCount={total}
            pageSize={list.pageSize}
            onPageChange={list.setPage}
            label="전체 카드"
            unit="개"
          />
        }
      />

      {isFormOpen && (
        <CardFormSheet
          key={`${formMode}-${editing?.id ?? 'new'}`}
          open
          mode={formMode}
          card={editing}
          activeTab={activeTab}
          onCreate={createCard}
          onUpdate={updateCard}
          onDelete={handleDeleteCard}
          onClose={overlay.close}
        />
      )}

      {modal === 'excel' && (
        <CardExcelUploadModal
          open
          onConfirm={bulkCreate}
          onClose={overlay.close}
        />
      )}
    </PageContainer>
  );
}