import { For, createSignal, onCleanup, onMount, type JSX } from "solid-js";
import { IslandPill, STATUS, CALM, CRITICAL, ModuleCard } from "./IslandMock";
import { ApprovalCardMock, SessionRowMock, DieLine, CLAUDE, CODEX } from "./ModuleMocks";

/**
 * Feature collage: five cells sold as the app's actual UI. The hero cell
 * shows the real collapsed pill (campfire slot, camera housing, live data)
 * dressed in the island's black surface; supporting cells reuse the same
 * module chrome, status palette, and metric language.
 */

export function CollageCell(props: {
  class?: string;
  kicker: string;
  title: string;
  body: string;
  children?: JSX.Element;
}) {
  return (
    <div
      class={`border-overlay1 bg-surface1 relative flex flex-col overflow-hidden rounded-2xl border p-6 ${props.class ?? ""}`}
    >
      <p class="text-subtext1 mb-3 text-[11px] font-semibold tracking-[0.14em] uppercase">
        {props.kicker}
      </p>
      <h3 class="text-text mb-2 text-lg font-bold tracking-tight">
        {props.title}
      </h3>
      <p class="text-subtext0 text-sm leading-relaxed">{props.body}</p>
      <div class="mt-5 flex-1">{props.children}</div>
    </div>
  );
}

/**
 * Stage for app-UI mocks: the island's black ink ground. The real island
 * is always dark (preferredColorScheme .dark), so the mocks read correctly
 * in both site themes.
 */
export function InkStage(props: { children: JSX.Element; class?: string }) {
  return (
    <div
      class={`flex justify-center rounded-xl py-5 ${props.class ?? ""}`}
      style={{ background: "#0d0d0f" }}
    >
      {props.children}
    </div>
  );
}

/** Fans panel mock: RPM gauge rows in the app's card chrome. */
function FansPanelMock() {
  const fans = [
    { rpm: 1270, frac: 0.26 },
    { rpm: 1219, frac: 0.25 }
  ];
  return (
    <ModuleCard>
      <div class="space-y-2.5">
        <For each={fans}>
          {(f) => (
            <div class="flex items-center gap-3">
              <div
                class="h-1 flex-1 overflow-hidden rounded-full"
                style={{ background: "rgba(255,255,255,0.08)" }}
              >
                <div
                  class="h-full rounded-full"
                  style={{
                    width: `${f.frac * 100}%`,
                    background: CALM
                  }}
                />
              </div>
              <span
                class="font-mono text-white"
                style={{ "font-size": "13px", "font-weight": 500 }}
              >
                {f.rpm}
              </span>
              <span class="text-[9px] font-semibold text-white/50">RPM</span>
            </div>
          )}
        </For>
        <div class="h-px" style={{ background: "rgba(255,255,255,0.06)" }} />
        <div class="flex gap-2">
          <span class="rounded-md border border-white/15 px-2 py-0.5 text-[11px] text-white/70">
            Auto
          </span>
          <span
            class="rounded-md px-2 py-0.5 text-[11px] font-bold"
            style={{ color: CRITICAL }}
          >
            MAX
          </span>
        </div>
      </div>
    </ModuleCard>
  );
}

function RemoteMock() {
  return (
    <div class="space-y-1.5">
      <SessionRowMock
        title="api · main"
        prompt="fix the flaky test"
        state="Running pytest -x…"
        status="running"
        agent={CLAUDE}
        host="build-box"
        age="4m"
      />
      <SessionRowMock
        title="trainer · fp16"
        prompt="benchmark fp16"
        state="Done · replied 1m ago"
        status="ready"
        agent={CODEX}
        host="gpu-rig"
        age="12m"
      />
    </div>
  );
}

/* Deterministic usage wander for the traces. */
const wander = (n: number, k: number) =>
  0.42 + 0.22 * Math.sin(n * 0.45 + k * 1.7) + 0.12 * Math.sin(n * 1.3 + k);

/**
 * The Temperatures module: one line per die — label, its 60 s usage trace,
 * its temperature. The GPU climbs past the 70 ° warn line and tints amber.
 */
function GaugesMock() {
  const [n, setN] = createSignal(0);
  onMount(() => {
    const interval = setInterval(() => setN((v) => v + 1), 700);
    onCleanup(() => clearInterval(interval));
  });
  const trace = (k: number) =>
    Array.from({ length: 30 }, (_, i) => Math.max(0.04, Math.min(0.97, wander(n() + i, k))));
  const gpuCelsius = () => 62 + 12 * (0.5 + 0.5 * Math.sin(n() * 0.18));
  return (
    <ModuleCard>
      <div class="space-y-2">
        <DieLine label="CPU" usage={trace(0)} celsius={58 + 4 * Math.sin(n() * 0.3)} />
        <DieLine label="GPU" usage={trace(2)} celsius={gpuCelsius()} />
      </div>
    </ModuleCard>
  );
}

export default function FeatureCollage() {
  return (
    <section
      class="bg-base relative z-20 px-4 pt-40 pb-16 md:px-8"
      id="feature-collage"
    >
      <div class="mx-auto max-w-5xl">
        <p class="text-subtext1 mb-2 text-center text-xs font-semibold tracking-[0.18em] uppercase">
          Why the Nook
        </p>
        <h2 class="text-text mb-12 text-center text-3xl font-bold">
          Keep track of your agents while you work
        </h2>

        <div class="grid grid-cols-1 gap-5 md:grid-cols-3">
          {/* Hero: real collapsed pill on the island surface */}
          <div class="border-overlay1 bg-surface1 relative col-span-1 flex flex-col items-center overflow-hidden rounded-2xl border p-6 md:col-span-2">
            <div class="mb-5 self-start">
              <p class="text-subtext1 mb-3 text-[11px] font-semibold tracking-[0.14em] uppercase">
                The island
              </p>
              <h3 class="text-text mb-2 text-2xl font-bold tracking-tight">
                Agent status at the top of your screen
              </h3>
              <p class="text-subtext0 max-w-sm text-sm leading-relaxed">
                The island sits around your Mac's notch, with agent activity on
                the left and your choice of information on the right. Blue means
                running, green means ready, and amber means an agent needs you.
              </p>
            </div>
            <div class="my-10 flex w-full justify-center">
              <IslandPill
                campfire="running"
                right={
                  <div class="flex flex-col items-center gap-1 px-1">
                    <div class="flex gap-1.5">
                      <span
                        class="inline-block h-2.5 w-2.5 rounded-[3px]"
                        style={{ background: STATUS.running }}
                      />
                      <span
                        class="inline-block h-2.5 w-2.5 rounded-[3px]"
                        style={{ background: STATUS.ready }}
                      />
                    </div>
                    <div class="flex gap-1.5">
                      <span
                        class="inline-block h-2.5 w-2.5 rounded-[3px]"
                        style={{ background: STATUS.attention }}
                      />
                      <span
                        class="inline-block h-2.5 w-2.5 rounded-[3px]"
                        style={{ background: STATUS.idle }}
                      />
                    </div>
                  </div>
                }
              />
            </div>
            <p class="text-subtext0 -mb-1 text-center text-xs">
              Open the island to see your sessions
            </p>
          </div>

          {/* Approvals */}
          <CollageCell
            kicker="Approvals"
            title="Review permission requests"
            body="Review permission requests above your sessions and choose Allow, Allow for session, or Deny. The iPhone and Apple Watch beta lets you respond away from your Mac."
          >
            <InkStage>
              <div class="w-full max-w-sm px-3">
                <ApprovalCardMock
                  agent={CLAUDE}
                  title="the-nook · bridge"
                  tool="Edit"
                  input="server/routes.ts"
                />
              </div>
            </InkStage>
          </CollageCell>

          {/* Fans */}
          <CollageCell
            kicker="Cooling"
            title="Fan speeds and cooling modes"
            body="Monitor each fan's speed and choose a cooling mode. Keep automatic control or start a MAX session before a demanding task."
          >
            <InkStage class="w-full">
              <div class="w-full max-w-[260px] text-left">
                <FansPanelMock />
              </div>
            </InkStage>
          </CollageCell>

          {/* Gauges */}
          <CollageCell
            kicker="Your Mac"
            title="CPU and GPU monitoring"
            body="See CPU and GPU temperatures beside their last 60 seconds of usage. Temperature readings turn amber at 70°C and red at 85°C."
          >
            <InkStage class="w-full">
              <div class="w-full max-w-[300px] text-left">
                <GaugesMock />
              </div>
            </InkStage>
          </CollageCell>

          <CollageCell
            kicker="Remote"
            title="Agents on other machines"
            body="One-click setup for Tailscale and authorized known hosts. Remote sessions appear in the island with the host name beside the agent."
          >
            <InkStage class="w-full">
              <div class="w-full min-w-0 px-3" role="img" aria-label="Remote agent sessions on build-box and gpu-rig">
                <RemoteMock />
              </div>
            </InkStage>
          </CollageCell>
        </div>

        <p class="text-subtext1 mt-6 text-center text-xs">
          Also includes a volume mixer, screen capture, timers, weather, and more.{" "}
          <a
            href="#island-extras"
            class="underline decoration-dotted hover:opacity-80"
          >
            Browse the other modules
          </a>
        </p>
      </div>
    </section>
  );
}