/**
 * A MESH OF ONE, raised by the installer and nothing else.
 *
 * The four-node bed proves genesis too, but it proves it entangled with three machines joining
 * afterwards across a gateway. This bed is genesis alone: one machine, the installer, and the
 * question "is this a working mesh?" asked of the machine.
 *
 * It shares its genesis with the four-node bed (`./genesis.ts`) rather than describing installing
 * a second time — a second description kept in step with the first is the arrangement that put
 * the whole procedure inside a fixture in the first place (novox/hq ADR 0067).
 *
 *   MESH_LAB_INCUS='sudo -n incus'
 *   MESH_LAB_HOST_BINARY=.../mesh-host/mesh-host
 *   MESH_LAB_BOOTSTRAP_BINARY=.../mesh-host/mesh-bootstrap
 *   MESH_LAB_BUNDLE=.../mesh-host/examples/foundation-first-node.lock
 *   MESH_LAB_CATALOG=.../mesh-catalog/modules
 *   MESH_LAB_KEEP=1   to leave it standing afterwards
 */
import { test, before, after } from "node:test";
import assert from "node:assert/strict";
import { existsSync } from "node:fs";
import { loadScenario } from "../../src/declaration/parse.ts";
import { raise } from "../../src/lifecycle/raise.ts";
import { destroy } from "../../src/lifecycle/operate.ts";
import { bootstrapBinaryPath, hostBinaryPath } from "../../src/lifecycle/place.ts";
import { labIsUsable, destroyAll, foundationBundle } from "./harness.ts";
import { genesis, type GenesisResult } from "./genesis.ts";

const SCENARIO = "genesis-single";
const NODE = "anchor";

const capability = await labIsUsable();
const binary = hostBinaryPath();
const installer = bootstrapBinaryPath();
const bundle = process.env["MESH_LAB_BUNDLE"] ?? "";
const catalogDir = process.env["MESH_LAB_CATALOG"] ?? "";
// What the installer is told to build. It carries a builder rather than a finished control plane
// (novox/hq ADR 0073), so genesis needs a repository and a commit — and a commit rather than a
// branch, because what is cloned is the trust anchor for everything this mesh will ever run.
const source = process.env["MESH_LAB_SOURCE"] ?? "";
const sourceRef = process.env["MESH_LAB_SOURCE_REF"] ?? "";
const KEEP = !!process.env["MESH_LAB_KEEP"];
const FIXED_ID = process.env["MESH_LAB_INSTANCE_ID"] ?? (KEEP ? "genesis-single-live" : undefined);

const skip =
  !capability.usable ? capability.why :
  !binary ? "MESH_LAB_HOST_BINARY is not set to a built mesh-host" :
  !installer ? "MESH_LAB_BOOTSTRAP_BINARY is not set to a built mesh-bootstrap (mesh-host `make " +
    "bootstrap IMAGE=mesh-builder:development`)" :
  !source ? "MESH_LAB_SOURCE is not set to the repository the control plane is built from" :
  !sourceRef ? "MESH_LAB_SOURCE_REF is not set to the commit to build" :
  !bundle || !existsSync(bundle) ? "MESH_LAB_BUNDLE is not set to a foundation template" :
  !catalogDir || !existsSync(catalogDir) ? "MESH_LAB_CATALOG is not set to mesh-catalog/modules" :
  false;

let instanceId = "";
let result: GenesisResult;

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

  const raised = await raise(loadScenario(`scenarios/${SCENARIO}.yml`), {
    onProgress: (m) => console.log(`raise: ${m}`),
    ...(FIXED_ID ? { instanceId: FIXED_ID } : {}),
  });
  instanceId = raised.instanceId;
  console.log(`INSTANCE ${instanceId}${KEEP ? " (KEEP — will be left standing)" : ""}`);

  // Caught rather than allowed to propagate, so a failure BEFORE the installer ran is reported in
  // the same shape as one the installer itself named, instead of a bare stack trace.
  try {
    result = await genesis({
      instanceId,
      node: NODE,
      installer: installer as string,
      catalogDir,
      // The template, not a bundle. The store and broker become the references mesh-catalog pins,
      // and the machine pulls them over its uplink like any first node. mesh-controller is left
      // naming a registry that does not exist — the installer overwrites it, and leaving it proves
      // that it does.
      bundleTemplate: foundationBundle(bundle, []),
      source,
      sourceRef,
      // Phase two builds from the same forge; the repositories sit beside the control plane's.
      toolsSource: source.replace(/[^/]+\.git$/, "mesh-tools.git"),
      catalogSource: source.replace(/[^/]+\.git$/, "mesh-catalog.git"),
      log: (m) => console.log(m),
    });
  } catch (err) {
    result = {
      ok: false,
      step: "getting the machine ready to be bootstrapped — the installer never ran",
      why: (err as Error).message,
      report: [],
    };
  }
  console.log(result.report.join("\n"));
}, { timeout: 3_600_000 });

after(async () => {
  if (KEEP) {
    console.log(`\nLEFT STANDING: ${instanceId} — not destroyed (MESH_LAB_KEEP).`);
    return;
  }
  if (instanceId) await destroy(instanceId);
  await destroyAll(`${SCENARIO}-`);
}, { timeout: 900_000 });

test("one machine becomes a working mesh of one, raised by the installer", {
  skip, timeout: 3_600_000,
}, () => {
  assert.ok(result.ok,
    `GENESIS FAILED — ${result.step || "no step named"}.\n\n${result.why}\n\n` +
    result.report.join("\n"));
});