import { NavLink } from 'react-router-dom';
import {
  ArrowRightLeft,
  Boxes,
  ChevronsLeft,
  ChevronsRight,
  Hand,
  LayoutDashboard,
  Layers,
  type LucideIcon,
  MapPinned,
  Package,
  Server,
  Users as UsersIcon,
  Webhook,
} from 'lucide-react';
import { cn, Button, Tooltip, TooltipContent, TooltipTrigger } from '@vector/ui';
import { useAuth } from '../../contexts/AuthContext.js';

interface NavItem {
  to: string;
  label: string;
  icon: LucideIcon;
  adminOnly?: boolean;
}

const NAV_ITEMS: NavItem[] = [
  { to: '/', label: 'Dashboard', icon: LayoutDashboard },
  { to: '/parts', label: 'Parts', icon: Package },
  { to: '/part-models', label: 'Part models', icon: Layers },
  { to: '/locations', label: 'Locations', icon: MapPinned },
  { to: '/manufacturers', label: 'Manufacturers', icon: Boxes },
  { to: '/repairs', label: 'Repairs', icon: ArrowRightLeft },
  { to: '/custody', label: 'My Custody', icon: Hand },
  { to: '/hosts', label: 'Hosts', icon: Server },
  { to: '/admin/users', label: 'Users', icon: UsersIcon, adminOnly: true },
  { to: '/admin/webhooks', label: 'Webhooks', icon: Webhook, adminOnly: true },
];

export interface SidebarProps {
  collapsed: boolean;
  onToggle: () => void;
}

export function Sidebar({ collapsed, onToggle }: SidebarProps) {
  const { user } = useAuth();
  const items = NAV_ITEMS.filter((i) => !i.adminOnly || user?.role === 'ADMIN');

  return (
    <aside
      className={cn(
        'fixed inset-y-0 left-0 z-40 flex flex-col border-r border-border bg-card transition-[width] duration-200',
        collapsed ? 'w-14' : 'w-64',
      )}
    >
      <div className="flex h-13 items-center gap-2 border-b border-border px-3">
        <div className="flex h-8 w-8 shrink-0 items-center justify-center rounded-md bg-brand text-brand-foreground font-semibold">
          V
        </div>
        {!collapsed && <span className="truncate text-sm font-semibold">Vector</span>}
      </div>

      <nav className="flex-1 space-y-0.5 p-2">
        {items.map((item) => (
          <NavItemLink key={item.to} item={item} collapsed={collapsed} />
        ))}
      </nav>

      <div className="border-t border-border p-2">
        <Button
          variant="ghost"
          size="icon"
          className={cn('w-full', !collapsed && 'justify-start gap-2 px-2')}
          onClick={onToggle}
          aria-label={collapsed ? 'Expand sidebar' : 'Collapse sidebar'}
        >
          {collapsed ? <ChevronsRight className="h-4 w-4" /> : <ChevronsLeft className="h-4 w-4" />}
          {!collapsed && <span className="text-xs text-muted-foreground">Collapse</span>}
        </Button>
      </div>
    </aside>
  );
}

function NavItemLink({ item, collapsed }: { item: NavItem; collapsed: boolean }) {
  const content = (
    <NavLink
      to={item.to}
      end={item.to === '/'}
      className={({ isActive }) =>
        cn(
          'flex items-center gap-3 rounded-md px-2.5 py-2 text-sm transition-colors',
          isActive
            ? 'bg-accent text-accent-foreground'
            : 'text-muted-foreground hover:bg-accent/60 hover:text-foreground',
          collapsed && 'justify-center px-0',
        )
      }
    >
      <item.icon className="h-4 w-4 shrink-0" />
      {!collapsed && <span className="truncate">{item.label}</span>}
    </NavLink>
  );
  if (!collapsed) return content;
  return (
    <Tooltip>
      <TooltipTrigger asChild>{content}</TooltipTrigger>
      <TooltipContent side="right">{item.label}</TooltipContent>
    </Tooltip>
  );
}