"use client";

import { type KeyboardEvent, useRef, useState } from "react";
import {
  CV_DOWNLOAD_NAME,
  CV_URL,
  NAVIGATION_ITEMS,
} from "@/lib/site-navigation";
import MagneticButton from "./cinematic/MagneticButton";
import { Logo } from "./Logo";

const MENU_ID = "site-navigation-menu";

export function Header() {
  const [mobileMenuOpen, setMobileMenuOpen] = useState(false);
  const menuButtonRef = useRef<HTMLButtonElement>(null);

  const closeMobileMenu = () => setMobileMenuOpen(false);

  const handleMenuKeyDown = (event: KeyboardEvent<HTMLElement>) => {
    if (event.key !== "Escape") return;

    event.preventDefault();
    closeMobileMenu();
    menuButtonRef.current?.focus();
  };

  return (
    <header className="ds-section-dark fixed inset-x-0 top-0 z-[9000] h-[52px] w-full border-b border-[rgba(255,255,255,0.06)] bg-[var(--ink)]/95 px-sp-8 backdrop-blur-xl lg:px-sp-16">
      <div className="ds-section-shell flex h-full items-center justify-between">
        <a href="/#home" className="flex items-center gap-3 no-underline">
          <Logo variant="mark" size="sm" theme="dark" className="shrink-0" />
          <span className="font-display text-sm font-extrabold tracking-tight text-white">
            evandro<span className="text-[var(--slash)]">.dev.br</span>
          </span>
        </a>

        <nav
          aria-label="Navegação principal"
          className="site-header-nav items-center"
        >
          <ul className="flex list-none items-center gap-sp-2">
            {NAVIGATION_ITEMS.map((item) => (
              <li key={item.href}>
                <MagneticButton
                  as="a"
                  href={item.href}
                  className="ds-link rounded-sm px-sp-3 py-sp-2 text-white/85 transition-colors hover:bg-white/10 hover:text-white"
                  strength={0.15}
                >
                  {item.label}
                </MagneticButton>
              </li>
            ))}
          </ul>
        </nav>

        <div className="flex items-center gap-sp-4">
          <MagneticButton
            as="a"
            href={CV_URL}
            download={CV_DOWNLOAD_NAME}
            className="site-header-cv ds-link ds-link-accent rounded-sm font-semibold transition-shadow hover:shadow-[0_0_0_1px_rgba(232,255,0,.8),0_8px_24px_rgba(232,255,0,.35)]"
            strength={0.2}
          >
            Download CV
          </MagneticButton>
          <button
            ref={menuButtonRef}
            type="button"
            className="site-header-menu-toggle flex h-11 w-11 flex-col items-center justify-center gap-sp-2 border-none bg-transparent focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-[var(--slash)] focus-visible:ring-offset-2 focus-visible:ring-offset-[var(--ink)]"
            onClick={() => setMobileMenuOpen(!mobileMenuOpen)}
            aria-controls={mobileMenuOpen ? MENU_ID : undefined}
            aria-label={mobileMenuOpen ? "Fechar menu" : "Abrir menu"}
            aria-expanded={mobileMenuOpen}
            onKeyDown={handleMenuKeyDown}
          >
            <span
              className={`h-0.5 w-5 bg-white transition-transform duration-300 ${mobileMenuOpen ? "translate-y-[6px] rotate-45" : ""}`}
            />
            <span
              className={`h-0.5 w-5 bg-white transition-opacity duration-300 ${mobileMenuOpen ? "opacity-0" : ""}`}
            />
            <span
              className={`h-0.5 w-5 bg-white transition-transform duration-300 ${mobileMenuOpen ? "-translate-y-[6px] -rotate-45" : ""}`}
            />
          </button>
        </div>
      </div>

      {mobileMenuOpen ? (
        <div className="site-header-mobile-panel absolute inset-x-0 top-[52px] border-b border-[rgba(255,255,255,0.06)] bg-[var(--ink)]/98 px-sp-6 backdrop-blur-xl lg:px-sp-16">
          <div className="ds-section-shell flex flex-col py-sp-6">
            <nav
              id={MENU_ID}
              aria-hidden={!mobileMenuOpen}
              aria-label="Navegação mobile"
              onKeyDown={handleMenuKeyDown}
            >
              <ul className="flex list-none flex-col gap-sp-2">
                {NAVIGATION_ITEMS.map((item) => (
                  <li key={item.href}>
                    <MagneticButton
                      as="a"
                      href={item.href}
                      className="ds-link block rounded-sm py-sp-3 text-white/85 transition-[padding,color] hover:pl-sp-2 hover:text-white"
                      onClick={closeMobileMenu}
                      strength={0.15}
                    >
                      {item.label}
                    </MagneticButton>
                  </li>
                ))}
                <li>
                  <MagneticButton
                    as="a"
                    href={CV_URL}
                    download={CV_DOWNLOAD_NAME}
                    className="ds-link ds-link-accent mt-sp-2 inline-flex rounded-sm font-semibold"
                    onClick={() => {
                      closeMobileMenu();
                      menuButtonRef.current?.focus();
                    }}
                    strength={0.15}
                  >
                    Download CV
                  </MagneticButton>
                </li>
              </ul>
            </nav>
          </div>
        </div>
      ) : null}
    </header>
  );
}