---
import { Icon } from "astro-icon/components";
import VersionSelector from "./VersionSelector.astro";
import ThemeToggle from "./ThemeToggle.astro";
import { config } from "../config";

interface Props {
  version: string;
  versions: string[];
  svgContent?: string | null;
}

const { version, versions, svgContent } = Astro.props;

const navItems = [
  { id: "about", label: "About", align: "end" },
  { id: "spec", label: "Read the Spec", primary: true },
  { id: "faq", label: "FAQ", align: "start" },
];

const baseClasses = `inline-flex items-center justify-center gap-2
  px-4 py-2.5 sm:px-6 sm:py-3
  text-sm sm:text-base font-medium rounded-lg
  transition-all cursor-pointer`;

const primaryClasses = `bg-sky-600 text-white
  hover:bg-sky-500 hover:-translate-y-0.5 hover:shadow-md`;

const secondaryClasses = `text-gray-600 dark:text-neutral-400
  hover:bg-gray-100 hover:text-gray-950
  dark:hover:bg-neutral-800 dark:hover:text-neutral-50`;

---

<section
  id="top"
  class="relative min-h-[75vh] flex flex-col items-center justify-center
         px-6 pt-16 pb-24 overflow-hidden"
>
  <!-- Background gradient/texture -->
  <div
    class="absolute inset-0 bg-gradient-to-b
           from-gray-100 to-gray-50
           dark:from-neutral-900 dark:to-neutral-950"
  >
  </div>

  <!-- Subtle grid pattern with fade -->
  <div
    class="absolute inset-0 opacity-[0.06] dark:opacity-[0.12]
           bg-[linear-gradient(theme(colors.gray.950)_1px,transparent_1px),linear-gradient(90deg,theme(colors.gray.950)_1px,transparent_1px)]
           dark:bg-[linear-gradient(theme(colors.neutral.600)_1px,transparent_1px),linear-gradient(90deg,theme(colors.neutral.600)_1px,transparent_1px)]
           bg-[size:60px_60px] bg-center
           [-webkit-mask-image:linear-gradient(to_bottom,black_20%,transparent_80%)]
           [mask-image:linear-gradient(to_bottom,black_20%,transparent_80%)]"
  >
  </div>

  <!-- Top bar with version & theme -->
  <div
    class="absolute top-0 inset-x-0 z-20 flex items-center justify-between
           px-6 py-4 animate-fade-in-down"
  >
    <div class="flex items-center gap-3">
      <VersionSelector currentVersion={version} versions={versions} />
    </div>
    <div class="flex items-center gap-2">
      <ThemeToggle />
      <a
        href={config.repoUrl}
        target="_blank"
        rel="noopener noreferrer"
        class="p-2 rounded-lg transition-colors
               text-gray-500 dark:text-neutral-500
               hover:text-gray-950 dark:hover:text-neutral-50
               hover:bg-white/50 dark:hover:bg-neutral-800/50"
        aria-label="View on GitHub"
      >
        <Icon name="simple-icons:github" class="w-5 h-5" />
      </a>
    </div>
  </div>

  <!-- Main content -->
  <div class="relative z-10 w-full max-w-4xl mx-auto text-center">
    <!-- Title -->
    <h1
      class="animate-fade-in-up mb-4
             text-gray-950 dark:text-neutral-50"
    >
      Git Common-Flow
    </h1>

    <!-- Tagline -->
    <p
      class="animate-fade-in-up delay-100
             text-lg sm:text-xl max-w-2xl mx-auto mb-8
             text-gray-600 dark:text-neutral-400"
    >
      A sensible git workflow for teams who ship
    </p>

    <!-- Version badge -->
    <div class="animate-fade-in-up delay-200 mb-10">
      <span
        class="inline-flex items-center px-3 py-1 font-mono text-xs font-medium
               rounded-full border
               bg-gray-100 border-gray-200 text-gray-500
               dark:bg-neutral-800/50 dark:border-neutral-700 dark:text-neutral-400"
      >
        v{version}
      </span>
    </div>

    <!-- SVG Diagram -->
    {
      svgContent && (
        <div
          class="animate-fade-in-up delay-300
                 relative mx-auto mb-12 py-8 px-6 sm:py-16 sm:px-14
                 bg-white dark:bg-neutral-900
                 rounded-2xl shadow-lg dark:shadow-none
                 border border-gray-200 dark:border-neutral-800"
        >
          <div
            class="w-full max-w-3xl mx-auto [&>svg]:w-full [&>svg]:h-auto
                   dark:invert dark:hue-rotate-180 dark:contrast-90"
            set:html={svgContent}
          />
        </div>
      )
    }

    <!-- Navigation links -->
    <nav
      class="animate-fade-in-up delay-400
             grid grid-cols-[1fr_auto_1fr] items-center gap-2 sm:gap-4"
    >
      {
        navItems.map((item) => (
          <a
            href={`#${item.id}`}
            class:list={[
              baseClasses,
              item.primary ? primaryClasses : secondaryClasses,
              item.align === "end" && "justify-self-end",
              item.align === "start" && "justify-self-start",
            ]}
          >
            {item.label}
          </a>
        ))
      }
    </nav>
  </div>

  <!-- Scroll indicator -->
  <a
    href="#about"
    class="absolute bottom-8 left-1/2 -translate-x-1/2
           animate-fade-in delay-700
           text-gray-500 dark:text-neutral-500
           hover:text-sky-600 transition-colors"
    aria-label="Scroll to content"
  >
    <Icon name="heroicons:arrow-down" class="w-6 h-6 animate-bounce-subtle" />
  </a>
</section>

<script>
  // Remove animation classes after they complete to prevent re-triggering
  // on theme toggle.
  const animationClasses = [
    "animate-fade-in",
    "animate-fade-in-up",
    "animate-fade-in-down",
    "animate-slide-in-left",
  ];

  function cleanupAnimations() {
    const selector = animationClasses.map((c) => `.${c}`).join(", ");
    const animatedElements = document.querySelectorAll(selector);

    animatedElements.forEach((el) => {
      el.addEventListener(
        "animationend",
        () => {
          animationClasses.forEach((cls) => el.classList.remove(cls));
          // Also remove delay classes
          el.className = el.className.replace(/\bdelay-\d+\b/g, "").trim();
        },
        { once: true },
      );
    });
  }

  cleanupAnimations();
  document.addEventListener("astro:after-swap", cleanupAnimations);
</script>