import { useState } from 'react';
import { Plus, Upload } from 'lucide-react';
import { showToast } from '@/lib/notify';
import { PageContainer } from '@/components/layout/PageContainer';
import { PageToolbar, SearchInput } from '@/components/layout/PageToolbar';
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
import { Button } from '@/components/ui/button';
import { usePartners } from '@/features/partners/hooks/usePartners';
import { usePartnerFilters } from '@/features/partners/hooks/usePartnerFilters';
import { PartnerTable } from '@/features/partners/components/PartnerTable';
import { PartnerFormSheet } from '@/features/partners/components/PartnerFormSheet';
import { ExcelUploadModal } from '@/features/partners/components/ExcelUploadModal';
import { prioritiesList, type Partner } from '@/features/partners/types';

export default function PartnersPage() {
  const { partners, createPartner, updatePartner, deletePartner, bulkCreate } = usePartners();
  const {
    search,
    setSearch,
    priorityFilter,
    setPriorityFilter,
    page,
    setPage,
    paginated,
    totalPages,
    totalCount,
    itemsPerPage,
  } = usePartnerFilters(partners);

  // 모달 제어 + 폼 컨텍스트
  const [openModal, setOpenModal] = useState<null | 'form' | 'excel'>(null);
  const [formMode, setFormMode] = useState<'create' | 'edit'>('create');
  const [editing, setEditing] = useState<Partner | null>(null);

  const openCreate = () => {
    setFormMode('create');
    setEditing(null);
    setOpenModal('form');
  };
  const openEdit = (part: Partner) => {
    setFormMode('edit');
    setEditing(part);
    setOpenModal('form');
  };

  const handleDeletePartner = async (id: string, partnerName: string) => {
    if (confirm(`[${partnerName}] 파트너사를 협력사 목록에서 삭제하시겠습니까?`)) {
      try {
        await deletePartner(id);
        showToast('협력사 정보가 명부에서 제거되었습니다.', 'info');
      } catch (err) {
        showToast(err instanceof Error ? err.message : '협력사 삭제 실패', 'error');
      }
    }
  };

  return (
    <PageContainer>
      <PageToolbar
        actions={
          <>
            <Button variant="outline" onClick={() => setOpenModal('excel')}>
              <Upload />
              엑셀 일괄 업로드
            </Button>

            <Button onClick={openCreate}>
              <Plus />
              신규 협력사 등록
            </Button>
          </>
        }
      >
        <SearchInput
          id="partner-search"
          value={search}
          onChange={(e) => setSearch(e.target.value)}
          placeholder="협력사명, 코드 또는 담당자명으로 추적 검색..."
        />

        <Select value={priorityFilter} onValueChange={(v) => setPriorityFilter(v as string)}>
          <SelectTrigger id="partner-priority-filter" className="w-full sm:w-48">
            <SelectValue>
              {(value) => (value === 'ALL' ? '우선순위 가중치 (전체)' : `우선도: ${value}`)}
            </SelectValue>
          </SelectTrigger>
          <SelectContent>
            {prioritiesList.map((prio) => (
              <SelectItem key={prio} value={prio}>
                {prio === 'ALL' ? '우선순위 가중치 (전체)' : `우선도: ${prio}`}
              </SelectItem>
            ))}
          </SelectContent>
        </Select>
      </PageToolbar>

      <PartnerTable
        data={paginated}
        onRowClick={openEdit}
        page={page}
        totalPages={totalPages}
        totalCount={totalCount}
        pageSize={itemsPerPage}
        onPageChange={setPage}
      />

      {openModal === 'form' && (
        <PartnerFormSheet
          key={`${formMode}-${editing?.supplier_id ?? 'new'}`}
          open
          mode={formMode}
          partner={editing}
          onCreate={createPartner}
          onUpdate={updatePartner}
          onDelete={handleDeletePartner}
          onClose={() => setOpenModal(null)}
        />
      )}

      {openModal === 'excel' && (
        <ExcelUploadModal
          open
          partners={partners}
          onConfirm={bulkCreate}
          onClose={() => setOpenModal(null)}
        />
      )}
    </PageContainer>
  );
}