import {
  GitHubIcon,
  NotionIcon,
  PostgresIcon,
  RestIcon,
  SalesforceCloudIcon,
  StripeIcon,
} from '@/components/brand-icons';
import { HeroStepRotator } from '@/components/hero-step-rotator';
import { HeroVideo } from '@/components/hero-video';
import { JsonLd } from '@/components/json-ld';
import { ParticleHero } from '@/components/particle-hero';
import { PulseLink } from '@/components/pulse';
import { ScrollCue } from '@/components/scroll-cue';
import { TIERS } from '@/lib/pricing';
import { FAQ, faqJsonLd } from '@/lib/seo';
import { Activity, ChevronDown, Container, ShieldCheck } from 'lucide-react';
import Link from 'next/link';
import type { ComponentType } from 'react';

interface ExampleEntry {
  title: string;
  desc: string;
  /** Brand logo component rendered inside the coloured chip. */
  Icon: ComponentType<{ size?: number; className?: string }>;
  /** Official brand colour for the chip background. */
  bg: string;
  /** Foreground colour the icon paints in. */
  fg: string;
}

const EXAMPLES: ExampleEntry[] = [
  {
    title: 'PostgreSQL',
    desc: 'Read-only access to your tables with schema introspection.',
    Icon: PostgresIcon,
    bg: '#336791',
    fg: '#ffffff',
  },
  {
    title: 'Salesforce',
    desc: 'Query opportunities, accounts and leads from Claude.',
    Icon: SalesforceCloudIcon,
    bg: '#00a1e0',
    fg: '#ffffff',
  },
  {
    title: 'Notion',
    desc: 'Search pages, read content, append blocks.',
    Icon: NotionIcon,
    bg: '#ffffff',
    fg: '#0a0a0b',
  },
  {
    title: 'GitHub',
    desc: 'List issues, search code, post comments. Scoped to one repo.',
    Icon: GitHubIcon,
    bg: '#181717',
    fg: '#ffffff',
  },
  {
    title: 'Stripe',
    desc: 'Look up charges, customers, refunds (read-only by default).',
    Icon: StripeIcon,
    bg: '#635bff',
    fg: '#ffffff',
  },
  {
    title: 'Custom REST',
    desc: 'Wrap any HTTP API behind one prompt-defined tool surface.',
    Icon: RestIcon,
    bg: '#6366f1',
    fg: '#ffffff',
  },
];

// Honest marketplace preview data: template names + tool counts only. These
// mirror the first-party starter templates; no invented fork counts, no
// "verified" theatre — the frame is labelled as a preview of the card format.
const PREVIEW_TEMPLATES: { name: string; author: string; tools: number }[] = [
  { name: 'notion-search', author: 'core', tools: 2 },
  { name: 'github-issues', author: 'core', tools: 3 },
  { name: 'stripe-readonly', author: 'core', tools: 4 },
  { name: 'postgres-readonly', author: 'core', tools: 3 },
];

const MARKETPLACE_POINTS: { t: string; d: string }[] = [
  {
    t: 'Fork and own',
    d: 'Start from a server someone already shipped. Fork it, paste your own credentials, deploy. No prompt required.',
  },
  {
    t: 'Secrets never travel',
    d: "A template carries the spec and generated code, never the author's API keys. You add your own on fork.",
  },
  {
    t: 'Open from day one',
    d: 'Publish a server you built and anyone can fork it. The marketplace is young — early templates set the standard.',
  },
];

// Proof-by-specificity band: three claims a visitor can verify with one
// click instead of taking our word for it. Substitute for social proof
// until there is social proof.
const PROOF_POINTS: {
  t: string;
  d: string;
  href: string;
  linkLabel: string;
  Icon: ComponentType<{ size?: number; className?: string }>;
}[] = [
  {
    t: 'OAuth 2.1 authorization server',
    d: 'PKCE, Dynamic Client Registration and Resource Indicators (RFC 8707) in front of every server.',
    href: '/docs/oauth',
    linkLabel: 'Read the auth docs',
    Icon: ShieldCheck,
  },
  {
    t: 'Live system status',
    d: 'Uptime and incident history, public. If a build queue slows down, you see it before we tell you.',
    href: '/status',
    linkLabel: 'Check status now',
    Icon: Activity,
  },
  {
    t: 'Per-server container isolation',
    d: 'Every generated server runs in its own Docker container. Secrets AES-256-GCM encrypted at rest.',
    href: '/security',
    linkLabel: 'Security architecture',
    Icon: Container,
  },
];

const PIPELINE_STEPS: { n: string; t: string; d: string }[] = [
  {
    n: '01',
    t: 'Describe your tool',
    d: 'A sentence is enough. List your secrets and which APIs to call.',
  },
  {
    n: '02',
    t: 'We generate, check, deploy',
    d: 'Claude writes the spec. We render TypeScript, run static checks, build a container, deploy to your subdomain.',
  },
  {
    n: '03',
    t: 'Install in your client',
    d: 'Copy the snippet into Claude Desktop, Cursor or ChatGPT. OAuth flow on first use.',
  },
];

/** Mono shell-comment section kicker: `## how_it_works` */
function Kicker({ children }: { children: string }) {
  return <p className="kicker">## {children}</p>;
}

export default function Landing() {
  const teaserTiers = TIERS.filter((t) => t.name === 'Hobby' || t.name === 'Pro');
  return (
    <>
      {/* Hero — left: copy + CTAs, right: cycling terminal tile. The WebGL
          particle field sits behind at z-0 with pointer-events:none so the
          CTAs stay interactive. */}
      <section
        className="relative flex items-center overflow-hidden border-b border-[--color-border]"
        style={{ minHeight: 'calc(100svh - 3rem)' }}
      >
        <ParticleHero />
        <div className="relative z-10 mx-auto grid w-full max-w-6xl gap-10 px-6 py-14 sm:py-20 md:grid-cols-[1.05fr_1fr] md:items-center md:gap-12">
          <div className="min-w-0">
            <h1 className="text-balance text-[36px] font-semibold leading-[1.04] tracking-[-0.03em] sm:text-[44px] md:text-[60px]">
              Describe your tool.
              <br />
              We host the server.
              <br />
              <span className="text-[--color-fg-muted]">AI uses it.</span>
            </h1>
            <p className="mt-5 max-w-md text-[15px] leading-relaxed text-[--color-fg-muted] sm:text-[16px]">
              From prompt to production MCP server in 60 seconds. OAuth 2.1, Streamable HTTP, ready
              for Claude, Cursor and ChatGPT.
            </p>
            <div className="mt-8 flex flex-wrap items-center gap-3">
              <PulseLink
                href="/login"
                className="btn-brand inline-flex h-11 items-center justify-center rounded-md px-5 text-[14px] font-medium"
              >
                Start building free →
              </PulseLink>
              <PulseLink
                href="#flow"
                className="inline-flex h-11 items-center justify-center rounded-md border border-[--color-border] bg-[--color-bg-elevated] px-5 text-[14px] text-[--color-fg-muted] transition-colors hover:text-[--color-fg]"
              >
                See a live build
              </PulseLink>
            </div>
            <div className="mt-8 flex flex-wrap gap-x-6 gap-y-2 text-[12px] text-[--color-fg-subtle]">
              <span className="inline-flex items-center gap-1.5">
                <span className="size-1.5 rounded-full bg-emerald-400" /> OAuth 2.1 + PKCE
              </span>
              <span className="inline-flex items-center gap-1.5">
                <span className="size-1.5 rounded-full bg-emerald-400" /> Streamable HTTP
              </span>
              <span className="inline-flex items-center gap-1.5">
                <span className="size-1.5 rounded-full bg-emerald-400" /> AES-256 secrets
              </span>
              <span className="inline-flex items-center gap-1.5">
                <span className="size-1.5 rounded-full bg-emerald-400" /> Per-server isolation
              </span>
            </div>
          </div>

          <div className="relative min-w-0">
            <HeroStepRotator />
          </div>
        </div>
      </section>
      <ScrollCue targetId="flow" />

      {/* Flow video — full-width edge-to-edge under the hero. Plays when
          scrolled into view (see hero-video.tsx); preload=metadata keeps the
          2.6 MB mp4 off the critical path on mobile. */}
      <section
        id="flow"
        className="relative w-full overflow-hidden border-b border-[--color-border] bg-black"
      >
        <div className="relative aspect-video w-full">
          <HeroVideo />
          <div
            aria-hidden
            className="pointer-events-none absolute inset-0"
            style={{
              background:
                'radial-gradient(ellipse at center, transparent 60%, rgba(10,10,11,0.55) 100%)',
            }}
          />
        </div>
      </section>

      {/* How it works — three pipeline nodes joined by a gradient connector.
          Desktop: horizontal line behind the numbered nodes. Mobile: the grid
          stacks and each card keeps its own node, joined by a left rail. */}
      <section id="how" className="border-b border-[--color-border] py-14 sm:py-20">
        <div className="mx-auto max-w-6xl px-6">
          <div className="mb-10 max-w-2xl">
            <Kicker>how_it_works</Kicker>
            <h2 className="mt-3 text-[28px] font-semibold tracking-tight sm:text-[32px]">
              Three steps. No JSON to write, no Docker to manage.
            </h2>
          </div>

          <div className="relative">
            {/* Gradient connector — desktop only, sits behind the node row. */}
            <div
              aria-hidden
              className="absolute left-0 right-0 top-[22px] hidden h-px md:block"
              style={{ background: 'var(--gradient-brand)', opacity: 0.35 }}
            />
            {/* Mobile left rail joining the stacked nodes. */}
            <div
              aria-hidden
              className="absolute bottom-6 left-[22px] top-[22px] w-px md:hidden"
              style={{ background: 'var(--gradient-brand)', opacity: 0.35 }}
            />
            <div className="grid gap-8 md:grid-cols-3 md:gap-6">
              {PIPELINE_STEPS.map((s) => (
                <div key={s.n} className="relative flex gap-4 md:block">
                  <div
                    className="mono relative z-10 flex size-11 shrink-0 items-center justify-center rounded-full border border-[--color-border-strong] text-[12px] tracking-widest text-[--color-fg]"
                    style={{
                      background: 'var(--color-bg)',
                      boxShadow: 'inset 0 1px 0 rgba(255,255,255,0.05)',
                    }}
                  >
                    {s.n}
                  </div>
                  <div className="min-w-0 md:mt-5">
                    <h3 className="text-[15px] font-semibold tracking-tight">{s.t}</h3>
                    <p className="mt-2 text-[13px] leading-relaxed text-[--color-fg-muted]">
                      {s.d}
                    </p>
                  </div>
                </div>
              ))}
            </div>
          </div>
        </div>
      </section>

      {/* Proof by specificity — three verifiable claims, each one click from
          its evidence. Replaces the old pseudo-logo row: no invented marks,
          just a plain-text compatibility line. */}
      <section className="border-b border-[--color-border] py-16 sm:py-24">
        <div className="mx-auto max-w-6xl px-6">
          <Kicker>verify_it_yourself</Kicker>
          <h2 className="mt-3 max-w-2xl text-[28px] font-semibold leading-[1.1] tracking-tight sm:text-[32px]">
            No testimonials yet — we're new.
            <br />
            <span className="text-[--color-fg-muted]">So check the claims instead.</span>
          </h2>
          <div className="mt-10 grid gap-4 md:grid-cols-3">
            {PROOF_POINTS.map((p) => {
              const Icon = p.Icon;
              return (
                <Link
                  key={p.t}
                  href={p.href}
                  className="panel-raised group flex flex-col p-5 transition-colors hover:border-[--color-border-strong]"
                >
                  <Icon size={20} className="text-[--color-accent]" />
                  <h3 className="mt-4 text-[15px] font-semibold tracking-tight">{p.t}</h3>
                  <p className="mt-2 flex-1 text-[13px] leading-relaxed text-[--color-fg-muted]">
                    {p.d}
                  </p>
                  <span className="mt-4 text-[13px] font-medium text-[--color-accent] transition-colors group-hover:text-[--color-fg]">
                    {p.linkLabel} →
                  </span>
                </Link>
              );
            })}
          </div>
          <p className="mt-10 text-center text-[13px] text-[--color-fg-subtle]">
            Works with Claude Desktop, Cursor, ChatGPT, VS Code Copilot and Continue.dev — anything
            that speaks MCP.
          </p>
        </div>
      </section>

      {/* Use cases — brand-coloured integration grid. */}
      <section className="border-b border-[--color-border] py-20 sm:py-28">
        <div className="mx-auto max-w-6xl px-6">
          <div className="mb-12 grid gap-6 md:grid-cols-[1fr_auto] md:items-end md:gap-12">
            <div>
              <Kicker>use_cases</Kicker>
              <h2 className="mt-3 text-[32px] font-semibold leading-[1.1] tracking-tight sm:text-[40px]">
                Wrap any HTTP API.
                <br />
                <span className="text-[--color-fg-muted]">In minutes.</span>
              </h2>
            </div>
            <p className="max-w-xs text-[14px] leading-relaxed text-[--color-fg-muted]">
              Ship integrations like these from one prompt each.
            </p>
          </div>

          <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3">
            {EXAMPLES.map((e) => {
              const Icon = e.Icon;
              return (
                <div
                  key={e.title}
                  className="panel-raised group flex items-start gap-4 p-5 transition-colors hover:border-[--color-border-strong]"
                >
                  <div
                    aria-hidden
                    className="flex size-12 shrink-0 items-center justify-center rounded-lg"
                    style={{
                      backgroundColor: e.bg,
                      color: e.fg,
                    }}
                  >
                    <Icon size={24} />
                  </div>
                  <div className="min-w-0">
                    <h3 className="text-[15px] font-semibold tracking-tight">{e.title}</h3>
                    <p className="mt-1.5 text-[13px] leading-relaxed text-[--color-fg-muted]">
                      {e.desc}
                    </p>
                  </div>
                </div>
              );
            })}
          </div>
        </div>
      </section>

      {/* Marketplace — split layout: selling points left, honest preview
          frame right. */}
      <section className="border-b border-[--color-border] py-20 sm:py-28">
        <div className="mx-auto grid max-w-6xl gap-14 px-6 md:grid-cols-[5fr_6fr] md:items-center md:gap-16">
          <div>
            <Kicker>marketplace</Kicker>
            <h2 className="mt-3 text-[32px] font-semibold leading-[1.1] tracking-tight sm:text-[40px]">
              Skip the prompt.
              <br />
              <span className="text-[--color-fg-muted]">Fork what works.</span>
            </h2>
            <p className="mt-5 max-w-md text-[14px] leading-relaxed text-[--color-fg-muted]">
              The marketplace is a library of working MCP servers. Fork one, paste your credentials,
              deploy. Or publish yours and let others build on it.
            </p>

            <ul className="mt-8 space-y-5">
              {MARKETPLACE_POINTS.map((p) => (
                <li key={p.t} className="flex items-start gap-3">
                  <span
                    aria-hidden
                    className="mt-[7px] size-1.5 shrink-0 rounded-full bg-[--color-accent]"
                  />
                  <div>
                    <h3 className="text-[14px] font-semibold tracking-tight">{p.t}</h3>
                    <p className="mt-1 text-[13px] leading-relaxed text-[--color-fg-muted]">
                      {p.d}
                    </p>
                  </div>
                </li>
              ))}
            </ul>

            <PulseLink
              href="/templates"
              className="btn-brand mt-8 inline-flex h-11 items-center gap-2 rounded-md px-5 text-[14px] font-medium"
            >
              Browse the marketplace →
            </PulseLink>
          </div>

          <MarketplacePreview />
        </div>
      </section>

      {/* Pricing teaser — Hobby + Pro only; the full matrix lives on
          /pricing. Data is shared via lib/pricing.ts so it can't drift. */}
      <section id="pricing" className="border-b border-[--color-border] py-20 sm:py-28">
        <div className="mx-auto max-w-4xl px-6">
          <div className="mb-12 text-center">
            <Kicker>pricing</Kicker>
            <h2 className="mt-3 text-[32px] font-semibold leading-[1.1] tracking-tight sm:text-[40px]">
              Pay for tool calls.
              <br />
              <span className="text-[--color-fg-muted]">Not for boilerplate.</span>
            </h2>
          </div>

          <div className="grid gap-5 sm:grid-cols-2">
            {teaserTiers.map((t) => {
              const featured = Boolean(t.highlight);
              return (
                <div
                  key={t.name}
                  className={`relative flex flex-col gap-6 rounded-xl border p-6 ${
                    featured
                      ? 'border-[--color-accent] bg-[--color-bg-elevated]'
                      : 'border-[--color-border] bg-[--color-bg-elevated]'
                  }`}
                  style={
                    featured
                      ? {
                          boxShadow:
                            '0 0 0 4px rgba(99, 102, 241, 0.12), 0 24px 50px rgba(0, 0, 0, 0.35)',
                        }
                      : { boxShadow: 'inset 0 1px 0 rgba(255,255,255,0.04)' }
                  }
                >
                  {featured && (
                    <span
                      className="absolute -top-3 left-1/2 -translate-x-1/2 whitespace-nowrap rounded-full border border-[--color-accent] px-3 py-0.5 text-[10px] font-semibold uppercase tracking-[0.18em] text-[--color-accent]"
                      style={{ backgroundColor: 'var(--color-bg)' }}
                    >
                      Recommended
                    </span>
                  )}

                  <div>
                    <div className="text-[11px] font-medium uppercase tracking-[0.18em] text-[--color-fg-muted]">
                      {t.name}
                    </div>
                    <div className="mt-3 flex items-baseline gap-2">
                      <span className="text-[40px] font-semibold leading-none tracking-tight text-[--color-fg]">
                        {t.price}
                      </span>
                      <span className="text-[12px] text-[--color-fg-subtle]">{t.tag}</span>
                    </div>
                    <p className="mt-3 text-[13px] leading-relaxed text-[--color-fg-muted]">
                      {t.description}
                    </p>
                  </div>

                  <ul className="flex flex-1 flex-col gap-2.5 border-t border-[--color-border] pt-5 text-[13px] text-[--color-fg-muted]">
                    {t.features.map((f) => (
                      <li key={f} className="flex items-start gap-2.5">
                        <span
                          aria-hidden
                          className={`mt-[7px] size-1 shrink-0 rounded-full ${
                            featured ? 'bg-[--color-accent]' : 'bg-[--color-fg-subtle]'
                          }`}
                        />
                        <span>{f}</span>
                      </li>
                    ))}
                  </ul>

                  <Link
                    href={t.href}
                    className={`inline-flex h-10 items-center justify-center rounded-md px-4 text-[13px] font-medium transition-colors ${
                      featured
                        ? 'btn-brand'
                        : 'border border-[--color-border] bg-[--color-bg-subtle] text-[--color-fg] hover:border-[--color-border-strong]'
                    }`}
                  >
                    {t.cta}
                  </Link>
                </div>
              );
            })}
          </div>

          <div className="mt-8 text-center">
            <Link
              href="/pricing"
              className="text-[14px] font-medium text-[--color-accent] transition-colors hover:text-[--color-fg]"
            >
              See all plans — Team, Enterprise →
            </Link>
          </div>
        </div>
      </section>

      {/* FAQ — collapsible accordion using native <details>. Crawlers and
          screen readers see the full Q+A in the HTML. */}
      <section className="border-b border-[--color-border] py-14 sm:py-20">
        <JsonLd data={faqJsonLd()} />
        <div className="mx-auto max-w-3xl px-6">
          <Kicker>faq</Kicker>
          <h2 className="mt-3 text-[28px] font-semibold tracking-tight">
            Questions, answered straight.
          </h2>
          <div className="mt-8 border-t border-[--color-border]">
            {FAQ.map((f) => (
              <details
                key={f.q}
                className="group border-b border-[--color-border] [&_summary::-webkit-details-marker]:hidden"
              >
                <summary className="flex cursor-pointer list-none items-center justify-between gap-4 py-4 text-[14.5px] font-semibold tracking-tight text-[--color-fg] transition-colors hover:text-[--color-accent]">
                  <span>{f.q}</span>
                  <ChevronDown
                    size={16}
                    className="shrink-0 text-[--color-fg-subtle] transition-transform duration-200 group-open:rotate-180 group-open:text-[--color-accent]"
                  />
                </summary>
                <p className="pb-5 pr-8 text-[13.5px] leading-relaxed text-[--color-fg-muted]">
                  {f.a}
                </p>
              </details>
            ))}
          </div>
        </div>
      </section>

      {/* Final CTA — the page must not end on FAQ. Gradient top border keeps
          the brand mark scarce but present at the exit point. */}
      <section className="relative py-20 sm:py-28">
        <div
          aria-hidden
          className="absolute inset-x-0 top-0 h-px"
          style={{ background: 'var(--gradient-brand)', opacity: 0.6 }}
        />
        <div className="mx-auto max-w-3xl px-6 text-center">
          <h2 className="text-balance text-[32px] font-semibold leading-[1.1] tracking-tight sm:text-[44px]">
            Your first server is <span className="text-brand-gradient">one prompt away</span>.
          </h2>
          <p className="mx-auto mt-4 max-w-md text-[14.5px] leading-relaxed text-[--color-fg-muted]">
            Free tier, full source export, no lock-in. If it doesn't work for you, take the
            TypeScript and leave.
          </p>
          <div className="mt-8 flex flex-wrap items-center justify-center gap-3">
            <PulseLink
              href="/login"
              className="btn-brand inline-flex h-11 items-center justify-center rounded-md px-6 text-[14px] font-medium"
            >
              Start building free →
            </PulseLink>
            <PulseLink
              href="/docs"
              className="inline-flex h-11 items-center justify-center rounded-md border border-[--color-border] bg-[--color-bg-elevated] px-6 text-[14px] text-[--color-fg-muted] transition-colors hover:text-[--color-fg]"
            >
              Read the docs
            </PulseLink>
          </div>
        </div>
      </section>
    </>
  );
}

/**
 * Honest marketplace preview.
 *
 * Static, server-rendered browser frame showing what a template card looks
 * like. Card data mirrors the first-party starter templates — names, author
 * and tool counts only. No fork counts, no "verified" badges: the frame is
 * explicitly labelled a preview, not live marketplace traffic.
 */
function MarketplacePreview() {
  return (
    <div
      className="overflow-hidden rounded-xl border border-[--color-border-strong] bg-[--color-bg-elevated]"
      style={{
        boxShadow: 'inset 0 1px 0 rgba(255,255,255,0.04), 0 24px 60px rgba(0, 0, 0, 0.45)',
      }}
    >
      {/* Browser chrome */}
      <div className="flex items-center gap-3 border-b border-[--color-border] bg-[--color-bg-subtle] px-4 py-3">
        <div className="flex gap-1.5">
          <span className="size-2.5 rounded-full bg-zinc-700" />
          <span className="size-2.5 rounded-full bg-zinc-700" />
          <span className="size-2.5 rounded-full bg-zinc-700" />
        </div>
        <div className="mono flex-1 truncate rounded-md border border-[--color-border] bg-[--color-bg] px-3 py-1 text-[11px] text-[--color-fg-subtle]">
          buildmymcpserver.com/templates
        </div>
      </div>

      {/* Toolbar inside the page chrome */}
      <div className="flex items-center justify-between gap-4 border-b border-[--color-border] px-5 py-3">
        <span className="text-[13px] font-semibold tracking-tight text-[--color-fg]">
          Templates
        </span>
        <span className="mono text-[10px] uppercase tracking-wider text-[--color-fg-subtle]">
          preview
        </span>
      </div>

      {/* Template cards grid */}
      <div className="grid gap-3 p-4 sm:grid-cols-2">
        {PREVIEW_TEMPLATES.map((t) => (
          <div
            key={t.name}
            className="rounded-md border border-[--color-border] bg-[--color-bg-subtle] p-4 transition-colors hover:border-[--color-accent]/40"
          >
            <div className="min-w-0">
              <div className="mono truncate text-[13px] font-semibold tracking-tight text-[--color-fg]">
                {t.name}
              </div>
              <div className="mt-1 flex items-center gap-1.5">
                <span className="mono text-[10px] uppercase tracking-wider text-[--color-fg-subtle]">
                  {t.author}
                </span>
                <span className="inline-flex items-center rounded-full border border-[--color-border-strong] px-1.5 py-px text-[9.5px] font-medium uppercase tracking-wider text-[--color-fg-subtle]">
                  template
                </span>
              </div>
            </div>

            <div className="mt-4 text-[11px] text-[--color-fg-subtle]">
              <span className="mono">{t.tools} tools</span>
            </div>
          </div>
        ))}
      </div>
    </div>
  );
}