import { useCallback, useEffect, useMemo, useState } from 'react';
import { Link, useNavigate } from 'react-router-dom';
import PageHeader from '@dukang/shared-ui/PageHeader';
import {
  AccountStatus,
  PARTNER_STAFF_ROLE_LABELS,
  PartnerStaffRole,
  type PartnerStaffItem,
} from '@dukang/shared-types';
import { deletePartnerStaff, listPartnerStaff, updatePartnerStaff } from '../lib/staff';

export default function StaffListPage() {
  const navigate = useNavigate();
  const [staff, setStaff] = useState<PartnerStaffItem[]>([]);
  const [q, setQ] = useState('');
  const [error, setError] = useState('');
  const [busyId, setBusyId] = useState<string | null>(null);

  const loadStaff = useCallback(() => {
    return listPartnerStaff().then(setStaff).catch((e) => {
      setError(e instanceof Error ? e.message : '加载失败');
    });
  }, []);

  useEffect(() => {
    void loadStaff();
  }, [loadStaff]);

  const filtered = useMemo(() => staff.filter((item) => {
    if (!q.trim()) return true;
    const keyword = q.trim();
    return item.name.includes(keyword) || item.phone.includes(keyword);
  }), [staff, q]);

  async function toggleStatus(item: PartnerStaffItem) {
    const next = item.status === AccountStatus.ACTIVE ? AccountStatus.DISABLED : AccountStatus.ACTIVE;
    setBusyId(item.id);
    setError('');
    try {
      await updatePartnerStaff(item.id, { status: next });
      await loadStaff();
    } catch (e) {
      setError(e instanceof Error ? e.message : '操作失败');
    } finally {
      setBusyId(null);
    }
  }

  async function removeStaff(item: PartnerStaffItem) {
    const ok = window.confirm(`确认删除子账号「${item.name}」？`);
    if (!ok) return;
    setBusyId(item.id);
    setError('');
    try {
      await deletePartnerStaff(item.id);
      await loadStaff();
    } catch (e) {
      setError(e instanceof Error ? e.message : '删除失败');
    } finally {
      setBusyId(null);
    }
  }

  async function editStaff(item: PartnerStaffItem) {
    const name = window.prompt('修改姓名', item.name);
    if (name == null || !name.trim()) return;
    const roleOptions = Object.values(PartnerStaffRole);
    const roleLabels = roleOptions.map((r) => PARTNER_STAFF_ROLE_LABELS[r]).join(' / ');
    const roleInput = window.prompt(`分配角色（${roleLabels}）`, item.staffRole);
    if (roleInput == null) return;
    const staffRole = roleOptions.find((r) => r === roleInput || PARTNER_STAFF_ROLE_LABELS[r] === roleInput);
    if (!staffRole) {
      setError('无效的角色');
      return;
    }
    setBusyId(item.id);
    setError('');
    try {
      await updatePartnerStaff(item.id, { name: name.trim(), staffRole });
      await loadStaff();
    } catch (e) {
      setError(e instanceof Error ? e.message : '保存失败');
    } finally {
      setBusyId(null);
    }
  }

  return (
    <div className="page-no-tab partner-staff-page">
      <PageHeader title="子账号管理" onBack={() => navigate('/center')} />

      <div style={{ padding: '0 20px 16px' }}>
        <div className="partner-search">
          <span className="material-symbols-outlined">search</span>
          <input placeholder="搜索姓名或手机号" value={q} onChange={(e) => setQ(e.target.value)} />
        </div>
      </div>

      {error && <p className="partner-form-error" role="alert" style={{ margin: '0 20px 12px' }}>{error}</p>}

      <div style={{ padding: '0 20px 100px' }}>
        {filtered.length === 0 && (
          <div className="empty">
            <p>暂无子账号</p>
            <p className="label-md text-muted">点击下方按钮添加首个子账号</p>
          </div>
        )}

        {filtered.map((item) => {
          const active = item.status === AccountStatus.ACTIVE;
          const busy = busyId === item.id;
          return (
            <div key={item.id} className="partner-staff-card">
              <div className="partner-staff-avatar">{item.name.slice(0, 1)}</div>
              <div className="partner-staff-info">
                <div style={{ display: 'flex', alignItems: 'center', gap: 8, flexWrap: 'wrap' }}>
                  <span className="headline-md">{item.name}</span>
                  <span className="partner-role-badge partner-role-badge--subtle">
                    {PARTNER_STAFF_ROLE_LABELS[item.staffRole]}
                  </span>
                </div>
                <p className="label-md text-muted">{item.phone}</p>
              </div>
              <div className="partner-staff-actions">
                <button
                  type="button"
                  className={`partner-toggle${active ? ' partner-toggle--on' : ''}`}
                  disabled={busy}
                  aria-label={active ? '禁用' : '启用'}
                  onClick={() => void toggleStatus(item)}
                >
                  <span className="partner-toggle-thumb" />
                </button>
                <div style={{ display: 'flex', gap: 12 }}>
                  <button type="button" className="partner-icon-btn" disabled={busy} onClick={() => void editStaff(item)}>
                    <span className="material-symbols-outlined">edit</span>
                  </button>
                  <button type="button" className="partner-icon-btn partner-icon-btn--danger" disabled={busy} onClick={() => void removeStaff(item)}>
                    <span className="material-symbols-outlined">delete</span>
                  </button>
                </div>
              </div>
            </div>
          );
        })}
      </div>

      <div className="partner-sticky-footer">
        <Link to="/center/staff/new" className="partner-btn-primary" style={{ display: 'flex', textDecoration: 'none' }}>
          <span className="material-symbols-outlined">person_add</span>
          添加子账号
        </Link>
      </div>
    </div>
  );
}