/**
 * The mesh assigns confluence — a tools-only, outbound-only external-SaaS integration
 * (novox/hq ADR 0039), the shape gitlab proved — and its runtime comes up and serves the module's
 * full tool surface, with NO valid Confluence credentials.
 *
 * confluence is the thinnest converted shape: no service container, no listener, no provisioner —
 * only a broker-bound runtime that serves the module's Confluence tools under a scoped account
 * (ADR 0047). The sharp point (the Servarr lesson) is that the runtime MUST register and serve every
 * tool even though the lab has no real Confluence and confluence's own token is a mesh-minted
 * own-secret pointing at nothing. confluence's client is built lazily and never throws at
 * registration, so:
 *   - the mesh-runtime-confluence container comes up and STAYS up (no crash on a missing token);
 *   - it logs `[mesh-tools] serving 3 tool(s)` — the install proof;
 *   - it binds its serve queues on the broker (e.g. serve.confluence.confluence_search), so the tools
 *     are actually reachable, not merely loaded;
 *   - it got its own scoped broker account (anchor-confluence).
 * A tool would only fail if it were actually invoked without real creds — which this bed does not do,
 * because the point is exactly that serving does not require them.
 *
 *   MESH_LAB_HOST_BINARY=.../mesh-host   MESH_LAB_BUNDLE=.../examples/substrate-first-node.lock
 *   scripts/build-module-runtime.sh confluence builds mesh-runtime-confluence:development into the
 *   local daemon; scenarios/tools-confluence.yml stocks it. There is no service image.
 */

import { test, before, after } from "node:test";
import assert from "node:assert/strict";
import { existsSync, readFileSync } from "node:fs";
import { loadScenario } from "../../src/declaration/parse.ts";
import { raise } from "../../src/lifecycle/raise.ts";
import { destroy, exec } from "../../src/lifecycle/operate.ts";
import { hostBinaryPath, HOST_PATH } from "../../src/lifecycle/place.ts";
import { labIsUsable, destroyAll } from "./harness.ts";

const capability = await labIsUsable();
const binary = hostBinaryPath();
const bundle = process.env["MESH_LAB_BUNDLE"] ?? "";

const skip = !capability.usable
  ? `lab not usable: ${capability.why}`
  : !binary || !existsSync(binary)
    ? "MESH_LAB_HOST_BINARY is not set to a built mesh-host"
    : !bundle || !existsSync(bundle)
      ? "MESH_LAB_BUNDLE is not set to a substrate bundle (mesh-host examples/)"
      : false;

const SCENARIO = "tools-confluence";
const MACHINE = "anchor";

let instanceId = "";
/** What the scenario's registry serves, by digest. */
let stocked: string[] = [];

function quote(s: string): string {
  return `'${s.replaceAll("'", `'\\''`)}'`;
}

async function on(command: string, timeoutMs?: number): Promise<{ out: string; ok: boolean }> {
  const { stdout } = await exec(instanceId, MACHINE, [
    "sh", "-c", `exec 2>&1\n${command}\necho "__exit=$?"`,
  ], timeoutMs);
  const marker = stdout.lastIndexOf("__exit=");
  if (marker < 0) return { out: stdout, ok: false };
  return { out: stdout.slice(0, marker), ok: stdout.slice(marker + 7).trim() === "0" };
}

async function must(command: string, timeoutMs?: number): Promise<string> {
  const { out, ok } = await on(command, timeoutMs);
  if (!ok) throw new Error(`${MACHINE}: ${command}\n${out}`);
  return out;
}

/** The control plane, a container on the node. */
async function mesh(command: string, timeoutMs?: number): Promise<string> {
  return must(`docker exec mesh-control /mesh-control ${command}`, timeoutMs);
}

/** The pinned reference for one of the scenario's images, by repository. */
function pinned(repository: string): string {
  const found = stocked.find((r) => r.slice(r.indexOf("/") + 1, r.indexOf("@")) === repository);
  assert.ok(found, `the scenario stocks no ${repository}; it serves ${stocked.join(", ")}`);
  return found;
}

/** The substrate bundle, its image references pointed at this scenario's own registry. */
function bundleFor(images: string[]): string {
  let text = readFileSync(bundle, "utf8");
  for (const ref of images) {
    const repository = ref.slice(ref.indexOf("/") + 1, ref.indexOf("@"));
    const escaped = repository.replaceAll("/", "\\/").replaceAll(".", "\\.");
    text = text.replaceAll(new RegExp(`[A-Za-z0-9_.:-]+\\/${escaped}@sha256:[0-9a-f]+`, "g"), ref);
  }
  return text;
}

function tokenFrom(said: string): string {
  const found = said.split("\n").map((l) => l.trim()).find((l) => l.length > 100 && !l.includes(" "));
  assert.ok(found, `no token in:\n${said}`);
  return found;
}

async function settled(withinMs = 600_000): Promise<void> {
  const until = Date.now() + withinMs;
  let last = "";
  while (Date.now() < until) {
    const asked = await on(`docker exec mesh-control /mesh-control status --json`);
    if (asked.ok) {
      try {
        const state = JSON.parse(asked.out) as {
          wrong: { node: string; outcome: string }[];
          waiting: { node: string }[];
          reported: { node: string; outcome: string; current: boolean }[];
        };
        const bad = state.wrong.find((w) => w.node === MACHINE);
        if (bad) throw new Error(`${MACHINE} did not apply what it was sent: ${bad.outcome}\n${asked.out}`);
        const word = state.reported.find((r) => r.node === MACHINE);
        if (!state.waiting.some((w) => w.node === MACHINE) && word?.outcome === "applied" && word.current) return;
        last = asked.out;
      } catch (err) {
        if (err instanceof Error && err.message.includes("did not apply")) throw err;
        last = asked.out;
      }
    }
    await new Promise((r) => setTimeout(r, 5000));
  }
  throw new Error(`${MACHINE} never caught up within ${Math.round(withinMs / 1000)}s. Last:\n${last}`);
}

before(async () => {
  if (skip) return;

  const raised = await raise(loadScenario(`scenarios/${SCENARIO}.yml`), {
    onProgress: (m) => console.log(`raise: ${m}`),
  });
  instanceId = raised.instanceId;
  stocked = raised.images;

  // Raise the substrate — store, broker, control — from the bundle.
  await must(`cat > /tmp/substrate.lock <<'MESHBUNDLE'\n${bundleFor(raised.images)}\nMESHBUNDLE`);
  await must(`${HOST_PATH} apply /tmp/substrate.lock`, 600_000);
  const up = await must(`docker ps --format '{{.Names}}'`);
  for (const c of ["mesh-store", "mesh-broker", "mesh-control"]) {
    assert.match(up, new RegExp(c), `the substrate did not raise ${c}:\n${up}`);
  }

  // The node joins its own mesh, so it is a node the mesh can assign to, and start the host so it
  // applies what it is pushed.
  await mesh(`node add ${MACHINE}`);
  const token = tokenFrom(await mesh(`token issue --node ${MACHINE}`));
  await must(`${HOST_PATH} enrol --token ${quote(token)}`);
  await must(`nohup ${HOST_PATH} run > /var/log/mesh-host.log 2>&1 & sleep 3`);
}, { timeout: 1_800_000 });

after(async () => {
  if (instanceId) await destroy(instanceId);
  await destroyAll(`${SCENARIO}-`);
}, { timeout: 600_000 });

test("the mesh assigns confluence: its tools-only runtime comes up and serves the full tool surface with no valid token", {
  skip, timeout: 1_500_000,
}, async () => {
  // confluence is tools-only and outbound-only: no service, no listener, no provisioner — just a
  // broker-bound runtime serving the module's tools. Its own token is a mesh-minted own-secret; the
  // lab has no real Confluence, so the token points at nothing — and that is the case under test: the
  // runtime must serve every tool regardless. The runtime container name and shape mirror the
  // committed manifest, with the image pinned to what this scenario serves by digest.
  const manifest = JSON.stringify({
    module: "confluence",
    version: "1",
    "own-secrets": {
      token: "/var/lib/confluence/token",
      broker: "/var/lib/mesh/confluence/broker",
    },
    resources: [
      { id: "mesh-state", type: "directory", path: "/var/lib/mesh/confluence", mode: "0700" },
      { id: "state", type: "directory", path: "/var/lib/confluence", mode: "0700" },
      { id: "config", type: "file", path: "/var/lib/confluence/config.json", merge: "json", content: "{}", mode: "0600" },
      {
        id: "runtime", type: "container", name: "mesh-runtime-confluence",
        image: pinned("mesh-runtime-confluence"), network: "host",
        volumes: [
          "/var/lib/confluence/config.json:/run/config/config.json:ro",
          "/var/lib/confluence/token:/run/secrets/token:ro",
          "/var/lib/mesh/confluence/broker:/run/secrets/broker:ro",
        ],
        env: {
          MESH_CONFLUENCE_TOKEN_FILE: "/run/secrets/token",
          MESH_CONFLUENCE_CONFIG_FILE: "/run/config/config.json",
          MESH_BROKER_FILE: "/run/secrets/broker",
        },
      },
    ],
  });

  await must(`printf %s ${quote(manifest)} > /tmp/confluence.json && docker cp /tmp/confluence.json mesh-control:/confluence.json`);
  await mesh("module add /confluence.json");
  // confluence serves tools, so it is issued a scoped broker account (it emits/consumes nothing else).
  const issued = await mesh(`module issue confluence --node ${MACHINE}`);
  assert.match(issued, /scoped to what it emits and consumes/, issued);
  await mesh(`assign ${MACHINE} confluence`);

  // ONE push, ONE convergence.
  await mesh(`push ${MACHINE}`);
  await settled();

  // --- the runtime is up and STABLE — it did not crash on a missing/invalid token -----------------
  const running = await must(`docker ps --format '{{.Names}}'`);
  assert.match(running, /(^|\n)mesh-runtime-confluence(\n|$)/,
    `mesh-runtime-confluence is not running after the push:\n${running}\n---host log---\n${(await on(`tail -40 /var/log/mesh-host.log`)).out}`);
  await new Promise((r) => setTimeout(r, 5000));
  const state = (await must(`docker inspect -f '{{.State.Running}} {{.RestartCount}}' mesh-runtime-confluence`)).trim();
  assert.equal(state, "true 0",
    `the confluence runtime is not up and stable — it should serve tools even with no valid token:\n${state}\n` +
      `${(await on(`docker logs mesh-runtime-confluence 2>&1 | tail -30`)).out}`);

  // --- the install proof: the runtime logs it is serving the full tool surface --------------------
  let log = "";
  const untilLogged = Date.now() + 60_000;
  while (Date.now() < untilLogged) {
    log = (await on(`docker logs mesh-runtime-confluence 2>&1`)).out;
    if (/\[mesh-tools\] serving \d+ tool\(s\)/.test(log)) break;
    await new Promise((r) => setTimeout(r, 3000));
  }
  const served = log.match(/\[mesh-tools\] serving (\d+) tool\(s\)/);
  assert.ok(served, `the confluence runtime never logged it is serving tools:\n${log}`);
  assert.equal(Number(served[1]), 3,
    `the confluence runtime served ${served?.[1]} tools, expected the full surface of 3:\n${log}`);

  // --- the tools are actually reachable: the runtime bound its serve queues on the broker ---------
  let served2 = "";
  const untilServing = Date.now() + 90_000;
  while (Date.now() < untilServing) {
    served2 = await must(`docker exec mesh-broker lavinmqctl list_queues name 2>&1 || true`);
    if (/serve\.confluence\.confluence_search/.test(served2)) break;
    await new Promise((r) => setTimeout(r, 3000));
  }
  assert.match(served2, /serve\.confluence\.confluence_search/,
    `confluence's runtime never bound its serve queue:\n${(await on(`docker logs mesh-runtime-confluence 2>&1 | tail -20`)).out}\n---\n${served2}`);

  // --- confluence got its own scoped broker account -----------------------------------------------
  const users = await must(`docker exec mesh-broker lavinmqctl list_users 2>&1`);
  assert.match(users, /anchor-confluence/, `the scoped account anchor-confluence is not on the broker:\n${users}`);
});