frontend/src/components/layout/Sidebar.jsx

import { NavLink } from 'react-router-dom';
import { BarChart3, FileText, GitBranch, Home, MessageSquare, Network, ShieldAlert, Workflow } from 'lucide-react';
import { useRepoStore } from '../../store/useRepoStore';
import { repoShortName } from '../../utils/formatters';

const NAV_ITEMS = [
  { path: '/', icon: Home, label: 'Home', always: true },
  { path: '/dashboard', icon: BarChart3, label: 'Dashboard' },
  { path: '/architecture', icon: GitBranch, label: 'Architecture' },
  { path: '/workflow', icon: Workflow, label: 'Workflow' },
  { path: '/assistant', icon: MessageSquare, label: 'Assistant' },
  { path: '/impact', icon: ShieldAlert, label: 'Impact' },
  { path: '/documentation', icon: FileText, label: 'Docs' },
];

export default function Sidebar() {
  const { repoId, ingestionData } = useRepoStore();
  const isActive = Boolean(repoId);

  return (
    <aside className="fixed left-0 top-0 z-40 hidden h-full w-64 flex-col border-r border-white/10 bg-[#0a0f1a]/95 backdrop-blur lg:flex">
      <div className="border-b border-white/10 p-5">
        <div className="flex items-center gap-3">
          <div className="flex h-9 w-9 items-center justify-center rounded-lg bg-cyan-500/15 ring-1 ring-cyan-400/30">
            <Network className="h-5 w-5 text-cyan-300" />
          </div>
          <div>
            <p className="font-display text-sm font-bold leading-tight text-white">CodeAtlas</p>
            <p className="text-[10px] uppercase tracking-[0.2em] text-slate-500">Enterprise</p>
          </div>
        </div>
      </div>

      {isActive && (
        <div className="m-3 rounded-lg border border-emerald-500/20 bg-emerald-500/8 p-3">
          <div className="mb-1 flex items-center gap-2">
            <span className="h-2 w-2 rounded-full bg-emerald-400 pulse-dot" />
            <span className="text-xs font-medium text-emerald-300">Repository Active</span>
          </div>
          <p className="path-text font-mono text-[11px] leading-4 text-slate-400">{repoShortName(ingestionData?.github_url || '')}</p>
        </div>
      )}

      <nav className="flex-1 space-y-1 p-3">
        {NAV_ITEMS.map(({ path, icon: Icon, label, always }) => {
          const disabled = !always && !isActive;
          return (
            <NavLink
              key={path}
              to={disabled ? '#' : path}
              aria-disabled={disabled}
              className={({ isActive: navActive }) =>
                [
                  'flex items-center gap-3 rounded-lg px-3 py-2.5 text-sm transition-colors',
                  disabled ? 'pointer-events-none opacity-35' : 'hover:bg-white/6',
                  navActive && !disabled
                    ? 'border border-cyan-400/20 bg-cyan-500/12 text-cyan-200'
                    : 'text-slate-400 hover:text-slate-100',
                ].join(' ')
              }
            >
              <Icon className="h-4 w-4 flex-shrink-0" />
              <span>{label}</span>
            </NavLink>
          );
        })}
      </nav>

      <div className="border-t border-white/10 p-4">
        <div className="rounded-lg border border-blue-500/15 bg-blue-500/8 px-3 py-2">
          <div className="flex items-center gap-2">
            <span className="flex h-6 w-6 items-center justify-center rounded-md bg-blue-500/20 text-[10px] font-bold text-blue-200">AI</span>
            <div>
              <p className="text-xs font-medium text-blue-200">IBM Bob</p>
              <p className="text-[10px] text-slate-500">Inference Intelligence</p>
            </div>
          </div>
        </div>
      </div>
    </aside>
  );
}