import { MoreHorizontal, Plus } from 'lucide-react';
import { useEffect, useMemo, useState } from 'react';
import { DataTableCard, type DataTableColumn, type DataTableFilter } from '../../components/data-table';
import { useToast } from '../../components/toast';
import { Button, Modal } from '../../components/ui';
import { PageTitle } from '../../layout/AppLayout';
import { formatDateTime } from '../../lib/date-format';
import {
  createOrganization,
  deleteOrganization,
  loadOrganizations,
  updateOrganization,
  type Organization,
  type OrganizationType
} from './operations-api';
import { LoadingModal, StatusBadge, useMinimumLoading } from './operation-utils';

const organizationTypes: Array<{ value: OrganizationType; label: string }> = [
  { value: 'SCHOOL', label: '학교' },
  { value: 'COMPANY', label: '회사' },
  { value: 'GOVERNMENT', label: '공공기관' },
  { value: 'LAB', label: '연구소' },
  { value: 'OTHER', label: '기타' }
];

const emptyForm = {
  name: '',
  type: 'SCHOOL' as OrganizationType,
  domain: ''
};

function organizationTypeLabel(type: OrganizationType) {
  return organizationTypes.find((item) => item.value === type)?.label ?? type;
}

export function OrganizationsPage() {
  const { toast } = useToast();
  const [organizations, setOrganizations] = useState<Organization[]>([]);
  const [loading, setLoading] = useState(true);
  const [failed, setFailed] = useState(false);
  const [modalOpen, setModalOpen] = useState(false);
  const [editing, setEditing] = useState<Organization | null>(null);
  const [deleteTarget, setDeleteTarget] = useState<Organization | null>(null);
  const [menuOrganization, setMenuOrganization] = useState<{ id: string; x: number; y: number } | null>(null);
  const [saving, setSaving] = useState(false);
  const [form, setForm] = useState(emptyForm);
  const loadingVisible = useMinimumLoading(loading);

  const refresh = () => {
    setLoading(true);
    loadOrganizations()
      .then((items) => {
        setOrganizations(items);
        setFailed(false);
      })
      .catch((error: Error) => {
        setOrganizations([]);
        setFailed(true);
        toast({ type: 'error', title: '조직 조회 실패', message: error.message });
      })
      .finally(() => setLoading(false));
  };

  useEffect(() => {
    refresh();
  }, []);

  useEffect(() => {
    if (!menuOrganization) return;

    const close = () => setMenuOrganization(null);
    const closeOnEscape = (event: KeyboardEvent) => {
      if (event.key === 'Escape') setMenuOrganization(null);
    };

    window.addEventListener('click', close);
    window.addEventListener('keydown', closeOnEscape);
    return () => {
      window.removeEventListener('click', close);
      window.removeEventListener('keydown', closeOnEscape);
    };
  }, [menuOrganization]);

  const rows = useMemo(
    () => organizations.map((organization, index) => ({ ...organization, no: organizations.length - index })),
    [organizations]
  );

  const columns = useMemo<Array<DataTableColumn<Organization>>>(
    () => [
      { key: 'no', header: 'No.', className: 'w-14 px-3 py-3 text-center font-medium', cell: (row) => <span className="block text-center font-semibold">{row.no}</span> },
      {
        key: 'name',
        header: '조직명',
        className: 'px-5 py-3 font-medium',
        cell: (row) => (
          <div className="min-w-0">
            <p className="truncate font-semibold">{row.name}</p>
            <p className="mt-1 truncate text-xs text-muted-foreground">{row.id}</p>
          </div>
        )
      },
      { key: 'type', header: '유형', className: 'w-32 px-5 py-3', cell: (row) => <StatusBadge status={organizationTypeLabel(row.type)} tone="blue" /> },
      { key: 'domain', header: '도메인', className: 'w-56 px-5 py-3', cell: (row) => <span className="font-mono text-xs text-muted-foreground">{row.domain || '-'}</span> },
      { key: 'createdAt', header: '등록일', className: 'w-40 px-5 py-3', cell: (row) => <span className="whitespace-nowrap text-muted-foreground">{formatDateTime(row.createdAt)}</span> },
      {
        key: 'actions',
        header: '',
        className: 'w-20 px-5 py-3 text-right font-medium',
        cell: (row) => (
          <div className="relative flex justify-end">
            <Button
              variant="ghost"
              className="size-8 px-0"
              title="메뉴"
              aria-label="메뉴"
              onClick={(event) => {
                event.stopPropagation();
                const rect = event.currentTarget.getBoundingClientRect();
                setMenuOrganization((prev) => (prev?.id === row.id ? null : { id: row.id, x: rect.right, y: rect.bottom + 6 }));
              }}
            >
              <MoreHorizontal className="size-4" />
            </Button>
          </div>
        )
      }
    ],
    [menuOrganization?.id]
  );

  const filters = useMemo<Array<DataTableFilter<Organization>>>(
    () => [
      {
        key: 'type',
        label: '유형',
        options: organizationTypes.map((type) => ({ label: type.label, value: type.value })),
        getValue: (row) => row.type
      }
    ],
    []
  );

  const closeModal = () => {
    setModalOpen(false);
    setEditing(null);
    setForm(emptyForm);
    setSaving(false);
  };

  const openCreateModal = () => {
    setEditing(null);
    setForm(emptyForm);
    setModalOpen(true);
  };

  const openEditModal = (organization: Organization) => {
    setEditing(organization);
    setForm({
      name: organization.name,
      type: organization.type,
      domain: organization.domain ?? ''
    });
    setModalOpen(true);
  };

  const submit = () => {
    if (!form.name.trim()) return;

    setSaving(true);
    const payload = {
      name: form.name.trim(),
      type: form.type,
      domain: form.domain.trim() || null
    };
    const request = editing
      ? updateOrganization(editing.id, payload)
      : createOrganization(payload);

    request
      .then(({ organization }) => {
        setOrganizations((prev) => editing
          ? prev.map((item) => item.id === organization.id ? organization : item)
          : [organization, ...prev]);
        toast({
          type: 'success',
          title: editing ? '조직 수정 완료' : '조직 등록 완료',
          message: `${organization.name} 조직이 ${editing ? '수정' : '등록'}되었습니다.`
        });
        closeModal();
      })
      .catch((error: Error) => {
        setSaving(false);
        toast({ type: 'error', title: editing ? '조직 수정 실패' : '조직 등록 실패', message: error.message });
      });
  };

  const confirmDelete = () => {
    if (!deleteTarget) return;

    setSaving(true);
    deleteOrganization(deleteTarget.id)
      .then(() => {
        setOrganizations((prev) => prev.filter((organization) => organization.id !== deleteTarget.id));
        toast({ type: 'success', title: '조직 삭제 완료', message: `${deleteTarget.name} 조직이 삭제되었습니다.` });
        setDeleteTarget(null);
      })
      .catch((error: Error) => {
        toast({ type: 'error', title: '조직 삭제 실패', message: error.message });
      })
      .finally(() => setSaving(false));
  };

  return (
    <>
      <PageTitle
        eyebrow="운영"
        title="조직 관리"
        description="가입 사용자에게 연결할 회사, 학교, 기관, 연구소 정보를 관리합니다."
        actions={
          <Button className="h-8 px-3 text-[13px]" onClick={openCreateModal}>
            <Plus className="size-4" />
            추가
          </Button>
        }
      />
      {failed ? (
        <div className="mb-4 rounded-md border border-rose-500/30 bg-rose-500/10 px-4 py-3 text-sm text-rose-200">
          조직 데이터를 불러오지 못했습니다.
        </div>
      ) : null}
      <DataTableCard
        title="목록"
        rows={rows}
        columns={columns}
        filters={filters}
        searchPlaceholder="조직명, 도메인 검색"
        getSearchText={(row) => `${row.name} ${row.type} ${organizationTypeLabel(row.type)} ${row.domain ?? ''}`}
        getRowKey={(row) => row.id}
        pageSize={10}
        minWidth={980}
        loading={loading}
        emptyMessage="표시할 조직 데이터가 없습니다."
      />
      {menuOrganization ? (() => {
        const row = rows.find((item) => item.id === menuOrganization.id);
        if (!row) return null;

        return (
          <div onClick={(event) => event.stopPropagation()} className="fixed z-[70] min-w-32 overflow-hidden rounded-md border border-border bg-card py-1 text-left shadow-xl" style={{ left: menuOrganization.x, top: menuOrganization.y, transform: 'translateX(-100%)' }}>
            <button
              type="button"
              className="block w-full px-3 py-2 text-left text-xs text-foreground hover:bg-muted"
              onClick={() => {
                setMenuOrganization(null);
                openEditModal(row);
              }}
            >
              수정
            </button>
            <button
              type="button"
              className="block w-full px-3 py-2 text-left text-xs text-rose-300 hover:bg-muted hover:text-rose-200"
              onClick={() => {
                setMenuOrganization(null);
                setDeleteTarget(row);
              }}
            >
              삭제
            </button>
          </div>
        );
      })() : null}
      <Modal
        open={modalOpen}
        title={editing ? '조직 수정' : '조직 추가'}
        onClose={closeModal}
        footer={
          <>
            <Button variant="outline" onClick={closeModal} disabled={saving}>취소</Button>
            <Button onClick={submit} disabled={!form.name.trim() || saving}>{saving ? '저장 중' : editing ? '수정' : '등록'}</Button>
          </>
        }
      >
        <div className="space-y-4">
          <label className="block">
            <span className="text-xs font-medium text-muted-foreground">조직명 <b className="text-foreground">*</b></span>
            <input
              className="mt-2 h-9 w-full rounded-md border border-input bg-background px-3 text-sm text-foreground outline-none placeholder:text-muted-foreground focus:ring-2 focus:ring-ring"
              value={form.name}
              onChange={(event) => setForm((prev) => ({ ...prev, name: event.target.value }))}
              placeholder="예: 영남대학교"
            />
          </label>
          <label className="block">
            <span className="text-xs font-medium text-muted-foreground">유형 <b className="text-foreground">*</b></span>
            <select
              className="mt-2 h-9 w-full rounded-md border border-input bg-background px-3 text-sm text-foreground outline-none focus:ring-2 focus:ring-ring"
              value={form.type}
              onChange={(event) => setForm((prev) => ({ ...prev, type: event.target.value }))}
            >
              {organizationTypes.map((type) => (
                <option key={type.value} value={type.value}>{type.label}</option>
              ))}
            </select>
          </label>
          <label className="block">
            <span className="text-xs font-medium text-muted-foreground">도메인</span>
            <input
              className="mt-2 h-9 w-full rounded-md border border-input bg-background px-3 font-mono text-sm text-foreground outline-none placeholder:text-muted-foreground focus:ring-2 focus:ring-ring"
              value={form.domain}
              onChange={(event) => setForm((prev) => ({ ...prev, domain: event.target.value }))}
            />
          </label>
        </div>
      </Modal>
      <Modal
        open={Boolean(deleteTarget)}
        title="조직 삭제"
        onClose={() => {
          if (!saving) setDeleteTarget(null);
        }}
        footer={
          <>
            <Button variant="outline" onClick={() => setDeleteTarget(null)} disabled={saving}>취소</Button>
            <Button onClick={confirmDelete} disabled={saving}>{saving ? '삭제 중' : '삭제'}</Button>
          </>
        }
      >
        <p className="text-sm text-muted-foreground">
          {deleteTarget?.name ?? '-'} 조직을 삭제하시겠습니까? 삭제된 조직은 목록과 선택 항목에서 숨겨집니다.
        </p>
      </Modal>
      <LoadingModal open={loadingVisible} />
    </>
  );
}