"use client";

import Link from "next/link";
import { usePathname } from "next/navigation";
import {
  LayoutDashboard,
  Mic2,
  ListMusic,
  BarChart3,
  CreditCard,
  Users,
  KeyRound,
  Settings,
  Lock,
} from "lucide-react";
import { cn } from "@/lib/utils";
import { Badge } from "@/components/ui/badge";
import type { PlanKey, FeatureKey } from "@/lib/billing/plans";
import { PLANS } from "@/lib/billing/plans";

interface NavItem {
  label: string;
  href: string;
  icon: React.ComponentType<{ className?: string }>;
  requiresFeature?: FeatureKey;
}

const NAV: NavItem[] = [
  { label: "Dashboard", href: "/dashboard", icon: LayoutDashboard },
  { label: "Episodes", href: "/episodes", icon: Mic2 },
  { label: "Series", href: "/series", icon: ListMusic, requiresFeature: "series_generator" },
  { label: "Usage", href: "/usage", icon: BarChart3 },
  { label: "Billing", href: "/billing", icon: CreditCard },
  { label: "Team", href: "/team", icon: Users, requiresFeature: "team_workspace" },
  { label: "API Keys", href: "/api-keys", icon: KeyRound, requiresFeature: "api_access" },
  { label: "Settings", href: "/settings", icon: Settings },
];

export function SidebarNav({ plan, onNavigate }: { plan: PlanKey; onNavigate?: () => void }) {
  const pathname = usePathname();
  const features = PLANS[plan].features;

  return (
    <nav className="flex flex-col gap-1 p-4">
      {NAV.map((item) => {
        const active = pathname === item.href || pathname.startsWith(item.href + "/");
        const locked = item.requiresFeature && !features.includes(item.requiresFeature);
        return (
          <Link
            key={item.href}
            href={item.href}
            onClick={onNavigate}
            className={cn(
              "flex items-center gap-3 rounded-full px-4 py-2.5 text-sm font-medium transition-colors",
              active
                ? "bg-brand/10 font-semibold text-brand"
                : "text-muted-foreground hover:bg-secondary hover:text-foreground"
            )}
          >
            <item.icon className="h-4 w-4" />
            <span className="flex-1">{item.label}</span>
            {locked && <Lock className="h-3.5 w-3.5 opacity-60" />}
          </Link>
        );
      })}
      <div className="mt-3 px-2">
        <Badge variant="brand" className="capitalize">
          {plan} plan
        </Badge>
      </div>
    </nav>
  );
}