import { Menu } from 'antd';
import { useLocation, useNavigate } from '@tanstack/react-router';
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import {
  faChartLine,
  faClipboardList,
  faClipboardCheck,
  faFunnelDollar,
  faUsers,
  faAddressCard,
  faBoxesStacked,
  faFileInvoiceDollar,
  faTags,
  faHeadset,
  faGear,
} from '@fortawesome/free-solid-svg-icons';
import type { ItemType } from 'antd/es/menu/interface';
import { authStore } from '../../lib/auth-store';

function getRole(): string {
  const token = authStore.get();
  if (!token) return 'rep';
  try {
    const payload = JSON.parse(atob(token.split('.')[1] ?? ''));
    return (payload.role as string) ?? 'rep';
  } catch {
    return 'rep';
  }
}

const REP_ITEMS: ItemType[] = [
  { key: '/', icon: <FontAwesomeIcon icon={faChartLine} fixedWidth />, label: 'Painel' },
  {
    key: '/funil',
    icon: <FontAwesomeIcon icon={faFunnelDollar} fixedWidth />,
    label: 'Funil de Vendas',
  },
  { key: '/clientes', icon: <FontAwesomeIcon icon={faUsers} fixedWidth />, label: 'Clientes' },
  {
    key: '/catalogo',
    icon: <FontAwesomeIcon icon={faBoxesStacked} fixedWidth />,
    label: 'Catálogo',
  },
  {
    key: '/pedidos',
    icon: <FontAwesomeIcon icon={faClipboardList} fixedWidth />,
    label: 'Pedidos',
  },
  {
    key: '/pedidos-erp',
    icon: <FontAwesomeIcon icon={faClipboardCheck} fixedWidth />,
    label: 'Consulta ERP',
  },
  { key: '/chamados', icon: <FontAwesomeIcon icon={faHeadset} fixedWidth />, label: 'SAC' },
  {
    key: '/relatorios',
    icon: <FontAwesomeIcon icon={faFileInvoiceDollar} fixedWidth />,
    label: 'Relatórios',
  },
];

const SUPERVISOR_ITEMS: ItemType[] = [
  { key: '/', icon: <FontAwesomeIcon icon={faChartLine} fixedWidth />, label: 'Painel' },
  {
    key: '/aprovacoes',
    icon: <FontAwesomeIcon icon={faClipboardCheck} fixedWidth />,
    label: 'Aprovações',
  },
  { key: '/clientes', icon: <FontAwesomeIcon icon={faUsers} fixedWidth />, label: 'Clientes' },
  {
    key: '/pedidos',
    icon: <FontAwesomeIcon icon={faClipboardList} fixedWidth />,
    label: 'Pedidos',
  },
  {
    key: '/catalogo',
    icon: <FontAwesomeIcon icon={faBoxesStacked} fixedWidth />,
    label: 'Catálogo',
  },
  {
    key: '/relatorios',
    icon: <FontAwesomeIcon icon={faFileInvoiceDollar} fixedWidth />,
    label: 'Relatórios',
  },
];

const GERENTE_ITEMS: ItemType[] = [
  { key: '/ger', icon: <FontAwesomeIcon icon={faChartLine} fixedWidth />, label: 'Painel' },
  { key: '/ger/equipe', icon: <FontAwesomeIcon icon={faUsers} fixedWidth />, label: 'Equipe' },
  {
    key: '/clientes',
    icon: <FontAwesomeIcon icon={faAddressCard} fixedWidth />,
    label: 'Clientes',
  },
  {
    key: '/relatorios',
    icon: <FontAwesomeIcon icon={faFileInvoiceDollar} fixedWidth />,
    label: 'Relatórios',
  },
  {
    key: '/ger/politicas',
    icon: <FontAwesomeIcon icon={faTags} fixedWidth />,
    label: 'Políticas Comerciais',
  },
  { key: '/ger/chamados', icon: <FontAwesomeIcon icon={faHeadset} fixedWidth />, label: 'SAC' },
  {
    key: '/ger/config',
    icon: <FontAwesomeIcon icon={faGear} fixedWidth />,
    label: 'Configurações',
  },
];

function getItems(role: string): ItemType[] {
  if (role === 'manager' || role === 'admin') return GERENTE_ITEMS;
  if (role === 'supervisor') return SUPERVISOR_ITEMS;
  return REP_ITEMS;
}

export function Sidebar() {
  const navigate = useNavigate();
  const location = useLocation();
  const role = getRole();
  const items = getItems(role);

  const selectedKey = items.find((item) => {
    const key = (item as { key?: string }).key ?? '';
    return key === '/' ? location.pathname === '/' : location.pathname.startsWith(key);
  })?.key as string | undefined;

  return (
    <aside
      style={{
        width: 'var(--layout-sidebar-width)',
        flexShrink: 0,
        height: 'calc(100vh - var(--layout-topbar-height))',
        background: 'var(--bg-surface)',
        borderRight: '1px solid var(--border-subtle)',
        position: 'sticky',
        top: 'var(--layout-topbar-height)',
        overflowY: 'auto',
        padding: 'var(--space-md) var(--space-xs)',
      }}
    >
      <Menu
        mode="inline"
        selectedKeys={selectedKey ? [selectedKey] : [location.pathname]}
        items={items}
        onClick={({ key }) => navigate({ to: key as string })}
        style={{
          border: 'none',
          background: 'transparent',
        }}
      />
    </aside>
  );
}
