---
import MobileMenu from "./MobileMenu.astro";
---

<header
  class="fixed top-0 left-0 right-0 z-40 nav-glass backdrop-blur-lg theme-transition"
  role="banner"
>
  <div class="max-w-7xl mx-auto">
    <nav
      class="py-4 px-6 sm:px-8 flex justify-between items-center font-['Instrument_Sans']"
      role="navigation"
      aria-label="Main navigation"
    >
      <div class="flex items-center">
        <a href="#hero" class="flex items-center gap-2.5 group" aria-label="Home">
          <div
            class="relative w-9 h-9 rounded-xl theme-accent flex items-center justify-center border theme-border overflow-hidden group-hover:border-opacity-80 transition-all duration-300 shadow-sm"
          >
            <span class="text-base font-bold tracking-tight theme-primary theme-transition">JL</span
            >
            <div
              class="absolute inset-0 theme-bg-05 opacity-0 group-hover:opacity-100 transition-opacity duration-500"
            >
            </div>
          </div>
          <span
            class="text-base font-medium tracking-tight theme-primary theme-transition hidden sm:block"
          >
            Jan-Marlon Leibl
          </span>
        </a>
      </div>

      <div class="hidden md:flex items-center">
        <div
          class="flex bg-black/5 backdrop-blur-md overflow-hidden theme-border border divide-x divide-white/5 shadow-sm rounded-xl"
        >
          {
            ["About", "Work", "Contact"].map((item, index) => (
              <a
                href={`#${item.toLowerCase()}`}
                class={`nav-item px-5 py-2 theme-secondary hover:theme-primary theme-transition ${index === 0 ? "rounded-l-xl" : ""} ${index === 2 ? "rounded-r-xl" : ""}`}
                aria-label={`View my ${item.toLowerCase()}`}
              >
                {item}
              </a>
            ))
          }
        </div>

        <div class="flex items-center gap-4 ml-6">
          <a
            href="mailto:jleibl@proton.me"
            class="flex items-center gap-2 px-5 py-2 theme-bg-05 theme-primary border theme-border rounded-xl hover:bg-opacity-100 transition-all duration-300 group shadow-sm"
            aria-label="Contact me via email"
          >
            <svg
              class="w-4 h-4 theme-primary"
              viewBox="0 0 24 24"
              fill="none"
              stroke="currentColor"
              stroke-width="2"
              stroke-linecap="round"
              stroke-linejoin="round"
            >
              <path
                d="M3 8l7.89 5.26a2 2 0 002.22 0L21 8M5 19h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v10a2 2 0 002 2z"
              ></path>
            </svg>
            <span class="text-sm font-medium">Contact</span>
            <div class="w-0 overflow-hidden group-hover:w-4 transition-all duration-300">
              <svg
                class="w-4 h-4 theme-primary"
                viewBox="0 0 24 24"
                fill="none"
                stroke="currentColor"
                stroke-width="2"
                stroke-linecap="round"
                stroke-linejoin="round"
              >
                <path d="M5 12h14M12 5l7 7-7 7"></path>
              </svg>
            </div>
          </a>
        </div>
      </div>

      <div class="flex md:hidden">
        <MobileMenu />
      </div>
    </nav>
  </div>
</header>

<script>
  document.addEventListener("DOMContentLoaded", () => {
    const header = document.querySelector("header");
    if (!header) return;

    header.style.transform = "translateY(0)";
    header.style.opacity = "1";

    let lastScrollY = window.scrollY;
    const scrollThreshold = 100;
    let isHeaderVisible = true;

    const sections = document.querySelectorAll("section[id]");
    const navItems = document.querySelectorAll(".nav-item");

    function setActiveNavItem() {
      const scrollPosition = window.scrollY + 200;

      navItems.forEach((item) => {
        item.classList.remove("nav-item-active");
        item.removeAttribute("aria-current");
      });

      let currentSection: string | null = null;

      sections.forEach((section) => {
        const sectionTop = section.getBoundingClientRect().top + window.scrollY;
        const sectionHeight = section.getBoundingClientRect().height;

        if (scrollPosition >= sectionTop && scrollPosition < sectionTop + sectionHeight) {
          currentSection = section.getAttribute("id");
        }
      });

      if (currentSection) {
        navItems.forEach((item) => {
          const href = item.getAttribute("href")?.substring(1);
          if (href === currentSection) {
            item.classList.add("nav-item-active");
            item.setAttribute("aria-current", "true");
          }
        });
      }
    }

    window.addEventListener("scroll", () => {
      const currentScrollY = window.scrollY;

      if (currentScrollY > 20) {
        header.classList.add("scrolled");
      } else {
        header.classList.remove("scrolled");
      }

      lastScrollY = currentScrollY;

      setActiveNavItem();
    });

    setActiveNavItem();

    navItems.forEach((item) => {
      item.addEventListener("keydown", (e) => {
        if (e instanceof KeyboardEvent && (e.key === "Enter" || e.key === " ")) {
          e.preventDefault();
          item.dispatchEvent(new MouseEvent("click"));
        }
      });
    });
  });
</script>

<style>
  header {
    transform: translateY(-100px);
    opacity: 0;
    transition:
      transform 0.4s ease-out,
      opacity 0.5s ease-out,
      border 0.3s ease;
  }

  header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  }

  .nav-item {
    position: relative;
    overflow: hidden;
    font-weight: 500;
    transition: all 0.2s ease;
  }

  .nav-item::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .black .nav-item::after {
    background-color: rgba(255, 255, 255, 0.8);
  }
  .red .nav-item::after {
    background-color: rgba(248, 113, 113, 0.8);
  }
  .gold .nav-item::after {
    background-color: rgba(251, 191, 36, 0.8);
  }

  .nav-item:hover::after {
    transform: translateX(0);
  }

  .nav-item-active {
    background-color: rgba(255, 255, 255, 0.08);
  }

  .nav-item-active::after {
    transform: translateX(0);
  }
</style>