"use client";

import { useState, useEffect } from "react";
import Link from "next/link";
import { usePathname } from "next/navigation";
import { motion, AnimatePresence } from "framer-motion";
import { LayoutDashboard, LogOut, Menu, X, Zap } from "lucide-react";
import { Button } from "@/components/ui/button";
import { cn } from "@/lib/utils";
import { Logo } from "@/components/shared/logo";
import { getCurrentUser, logout } from "@/lib/auth-store";
import type { UserResponse } from "@/lib/api";

const navLinks = [
  { href: "/pricing", label: "Pricing" },
  { href: "/about", label: "About" },
  { href: "/contact", label: "Contact" },
];

export function Navbar() {
  const [scrolled, setScrolled] = useState(false);
  const [mobileOpen, setMobileOpen] = useState(false);
  const [user, setUser] = useState<UserResponse | null>(null);
  const pathname = usePathname();

  useEffect(() => {
    const handleScroll = () => setScrolled(window.scrollY > 20);
    window.addEventListener("scroll", handleScroll);
    return () => window.removeEventListener("scroll", handleScroll);
  }, []);

  useEffect(() => {
    let mounted = true;
    getCurrentUser().then((currentUser) => {
      if (mounted) setUser(currentUser);
    });
    return () => {
      mounted = false;
    };
  }, []);

  const handleLogout = () => {
    setMobileOpen(false);
    logout();
  };

  return (
    <header
      className={cn(
        "fixed top-0 left-0 right-0 z-50 transition-all duration-300",
        scrolled
          ? "bg-black/80 backdrop-blur-xl border-b border-white/8 shadow-lg shadow-black/20"
          : "bg-transparent"
      )}
    >
      <nav className="container mx-auto px-4 h-16 flex items-center justify-between max-w-7xl">
        {/* Logo */}
        <Link href="/">
          <Logo iconSize={30} textSize="text-base" />
        </Link>

        {/* Desktop Nav */}
        <div className="hidden md:flex items-center gap-8">
          {navLinks.map((link) => (
            <Link
              key={link.href}
              href={link.href}
              className={cn(
                "text-sm font-medium transition-colors hover:text-white",
                pathname === link.href ? "text-white" : "text-zinc-400"
              )}
            >
              {link.label}
            </Link>
          ))}
        </div>

        {/* Desktop CTA */}
        <div className="hidden md:flex items-center gap-3">
          {user ? (
            <>
              <Link href="/dashboard">
                <Button variant="ghost" size="sm" className="text-zinc-300 hover:text-white">
                  <LayoutDashboard className="w-3.5 h-3.5 mr-1.5" />
                  Dashboard
                </Button>
              </Link>
              <Button
                type="button"
                size="sm"
                onClick={handleLogout}
                className="bg-white/5 border border-white/10 text-zinc-200 hover:bg-white/10"
              >
                <LogOut className="w-3.5 h-3.5 mr-1.5" />
                Logout
              </Button>
            </>
          ) : (
            <>
              <Link href="/login">
                <Button variant="ghost" size="sm" className="text-zinc-300 hover:text-white">
                  Sign In
                </Button>
              </Link>
              <Link href="/signup">
                <Button
                  size="sm"
                  className="bg-gradient-to-r from-violet-600 to-violet-500 hover:from-violet-500 hover:to-violet-400 text-white border-0 shadow-lg shadow-violet-900/30"
                >
                  <Zap className="w-3.5 h-3.5 mr-1.5" />
                  Get Started Free
                </Button>
              </Link>
            </>
          )}
        </div>

        {/* Mobile Menu Toggle */}
        <button
          className="md:hidden text-zinc-400 hover:text-white transition-colors"
          onClick={() => setMobileOpen(!mobileOpen)}
          aria-label="Toggle menu"
        >
          {mobileOpen ? <X className="w-5 h-5" /> : <Menu className="w-5 h-5" />}
        </button>
      </nav>

      {/* Mobile Menu */}
      <AnimatePresence>
        {mobileOpen && (
          <motion.div
            initial={{ opacity: 0, height: 0 }}
            animate={{ opacity: 1, height: "auto" }}
            exit={{ opacity: 0, height: 0 }}
            className="md:hidden bg-black/95 backdrop-blur-xl border-b border-white/8"
          >
            <div className="container mx-auto px-4 py-4 flex flex-col gap-4">
              {navLinks.map((link) => (
                <Link
                  key={link.href}
                  href={link.href}
                  onClick={() => setMobileOpen(false)}
                  className="text-zinc-300 hover:text-white font-medium py-2"
                >
                  {link.label}
                </Link>
              ))}
              <div className="flex flex-col gap-2 pt-2 border-t border-white/8">
                {user ? (
                  <>
                    <Link href="/dashboard" onClick={() => setMobileOpen(false)}>
                      <Button variant="ghost" className="w-full justify-start text-zinc-300">
                        <LayoutDashboard className="w-4 h-4 mr-2" />
                        Dashboard
                      </Button>
                    </Link>
                    <Button
                      type="button"
                      onClick={handleLogout}
                      className="w-full justify-start bg-white/5 border border-white/10 text-zinc-200 hover:bg-white/10"
                    >
                      <LogOut className="w-4 h-4 mr-2" />
                      Logout
                    </Button>
                  </>
                ) : (
                  <>
                    <Link href="/login" onClick={() => setMobileOpen(false)}>
                      <Button variant="ghost" className="w-full justify-start text-zinc-300">
                        Sign In
                      </Button>
                    </Link>
                    <Link href="/signup" onClick={() => setMobileOpen(false)}>
                      <Button className="w-full bg-gradient-to-r from-violet-600 to-violet-500 text-white border-0">
                        Get Started Free
                      </Button>
                    </Link>
                  </>
                )}
              </div>
            </div>
          </motion.div>
        )}
      </AnimatePresence>
    </header>
  );
}