import Link from "next/link";
import { ChevronLeftIcon, ScrollTextIcon } from "lucide-react";

import {
  collectGuideSections,
  PublicBlockRenderer,
} from "@/components/public/block-renderer";
import { SectionDrawer } from "@/components/public/section-drawer";
import { SiteHeader } from "@/components/public/site-header";
import { LiveRefresh } from "@/components/live-refresh";
import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert";
import { Badge } from "@/components/ui/badge";
import { Separator } from "@/components/ui/separator";
import type { PageSnapshot } from "@/lib/content/types";
import { cn } from "@/lib/utils";

export function GuideShell({ snapshot }: { snapshot: PageSnapshot }) {
  const sections = collectGuideSections(snapshot.blocks);

  return (
    <div className="min-h-svh bg-background">
      {process.env.BUZZ_DEMO_MODE === "true" ? null : (
        <LiveRefresh endpoint={`/api/events/page/${snapshot.page.id}`} />
      )}
      <SiteHeader />
      <div className="sticky top-0 z-30 border-b bg-background/95 supports-backdrop-filter:backdrop-blur">
        <div className="mx-auto w-full max-w-7xl px-4 sm:px-6">
          <div className="flex min-h-14 items-center gap-3 py-2">
            <Link
              href="/"
              className="grid size-10 shrink-0 place-items-center rounded-lg text-muted-foreground hover:bg-muted hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
              aria-label="กลับไปหน้ารวมตัวละคร"
            >
              <ChevronLeftIcon aria-hidden="true" />
            </Link>
            <div className="min-w-0 flex-1">
              <p className="truncate font-heading font-semibold">{snapshot.character.nameTh}</p>
              {snapshot.character.nameEn ? (
                <p className="truncate text-xs text-muted-foreground">{snapshot.character.nameEn}</p>
              ) : null}
            </div>
            {snapshot.character.element ? <Badge>{snapshot.character.element}</Badge> : null}
            {snapshot.character.role ? (
              <Badge variant="outline" className="hidden sm:inline-flex">
                {snapshot.character.role}
              </Badge>
            ) : null}
          </div>
          <nav
            aria-label={`หน้าคู่มือ ${snapshot.character.nameTh}`}
            className="flex min-h-11 gap-1 overflow-x-auto border-t [scrollbar-width:none]"
          >
            {snapshot.pages.map((page) => (
              <Link
                key={page.id}
                href={`/${snapshot.character.slug}/${page.slug}`}
                aria-current={page.id === snapshot.page.id ? "page" : undefined}
                className={cn(
                  "relative flex min-h-11 shrink-0 items-center rounded-md px-3 text-sm text-muted-foreground outline-none hover:text-foreground focus-visible:ring-2 focus-visible:ring-ring",
                  page.id === snapshot.page.id &&
                    "font-medium text-foreground after:absolute after:inset-x-3 after:bottom-0 after:h-0.5 after:bg-primary",
                )}
              >
                {page.title}
              </Link>
            ))}
          </nav>
        </div>
      </div>

      <div className="mx-auto grid w-full max-w-7xl gap-8 px-4 py-6 sm:px-6 lg:grid-cols-[13rem_minmax(0,1fr)] lg:py-10">
        <aside className="hidden lg:block">
          <div className="sticky top-32 space-y-3">
            <p className="flex items-center gap-2 text-sm font-medium">
              <ScrollTextIcon aria-hidden="true" className="size-4 text-primary" />
              สารบัญหน้านี้
            </p>
            <Separator />
            {sections.length > 0 ? (
              <nav aria-label="สารบัญหน้านี้" className="grid gap-1">
                {sections.map((section) => (
                  <a
                    key={section.id}
                    href={`#${section.id}`}
                    className="rounded-md px-2 py-2 text-sm leading-6 text-muted-foreground hover:bg-muted hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
                  >
                    {section.label}
                  </a>
                ))}
              </nav>
            ) : (
              <p className="text-sm leading-6 text-muted-foreground">หน้านี้ยังไม่มีหัวข้อย่อย</p>
            )}
          </div>
        </aside>

        <main className="min-w-0 space-y-6">
          {sections.length > 0 ? <SectionDrawer sections={sections} /> : null}
          {snapshot.page.publicNote ? (
            <Alert>
              <ScrollTextIcon aria-hidden="true" />
              <AlertTitle>หมายเหตุจากผู้เขียน</AlertTitle>
              <AlertDescription>{snapshot.page.publicNote}</AlertDescription>
            </Alert>
          ) : null}
          <PublicBlockRenderer snapshot={snapshot} />
        </main>
      </div>
    </div>
  );
}