/**
 * Spawn-based integration suite: the runner as the provisioner (story 06)
 * will actually run it — a real child process, config via env only, port
 * discovered from stdout, real WS from the outside.
 *
 * The full pipeline test is the story's M0-recast acceptance seam: a
 * `git daemon`-served vite-kitchen, cloned and npm-installed by the
 * spawned runner (real registry traffic — minutes on a cold cache), with
 * the credential-leak grep running over the child process's ENTIRE
 * stdout+stderr and the resulting clone's `.git/config`.
 */
import { existsSync } from "node:fs";
import { readFile } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";
import { afterEach, describe, expect, it } from "vitest";
import {
  serveFixtureRepo,
  type ServedFixtureRepo,
} from "@repo/core-testing/git";
import { spawnRunner, type SpawnedRunner } from "./spawn-runner";
import {
  connectProtocolClient,
  expectNamedError,
  handshake,
  sendAndAwaitReady,
  type ProtocolClient,
} from "./protocol-client";

const TOKEN = "spawned-runner-token";
const PAT = "ghp_spawned-pipeline-pat-51c2";

/** repo-root/fixtures/vite-kitchen, resolved from this file's location. */
const FIXTURE_DIR = path.resolve(
  path.dirname(fileURLToPath(import.meta.url)),
  "../../../fixtures/vite-kitchen",
);

let runner: SpawnedRunner | undefined;
let clients: ProtocolClient[] = [];
let served: ServedFixtureRepo | undefined;

afterEach(async () => {
  for (const client of clients) client.close();
  clients = [];
  await runner?.stop();
  runner = undefined;
  await served?.stop();
  served = undefined;
});

describe("spawned runner process", () => {
  it("boots from env config, announces its port, and completes the handshake over real WS", async () => {
    runner = await spawnRunner({ token: TOKEN });
    expect(runner.port).toBeGreaterThan(0);

    const client = await connectProtocolClient(runner.port, TOKEN);
    clients.push(client);
    const ready = await handshake(client);
    expect(ready).toEqual({ type: "ready" });
  });

  it("rejects a bad workspace token from a real client and closes the socket", async () => {
    runner = await spawnRunner({ token: TOKEN });
    const client = await connectProtocolClient(runner.port, "not-the-token");
    clients.push(client);
    client.send({ type: "hello" });
    await expectNamedError(client, "unauthorized");
    await expect(client.closed).resolves.toBe(1008);
    // The runner never writes the workspace token to its logs.
    expect(runner.output()).not.toContain(TOKEN);
  });

  it("runs the clone → install pipeline on vite-kitchen without leaking the credential", async () => {
    served = await serveFixtureRepo(FIXTURE_DIR);
    runner = await spawnRunner({ token: TOKEN });
    const client = await connectProtocolClient(runner.port, TOKEN);
    clients.push(client);
    await handshake(client);

    await sendAndAwaitReady(
      client,
      { type: "clone", gitUrl: served.cloneUrl, pat: PAT },
      "spawned clone completion",
    );
    // Real npm install of vite-kitchen (react, vite, tailwind, …):
    // minutes-scale on a cold cache — this is the honest cost of the
    // story's acceptance seam.
    await sendAndAwaitReady(
      client,
      { type: "install" },
      "spawned install completion",
      220_000,
    );

    // Staged progress arrived for both stages, elapsed nondecreasing per stage.
    for (const stage of ["cloning", "installing"] as const) {
      const statuses = client
        .received()
        .flatMap((m) => (m.type === "status" && m.stage === stage ? [m] : []));
      expect(statuses.length).toBeGreaterThanOrEqual(2);
      expect(statuses[0]?.elapsedMs).toBe(0);
      const elapsed = statuses.map((s) => s.elapsedMs);
      expect([...elapsed].sort((a, b) => a - b)).toEqual(elapsed);
    }

    // The install really happened: the fixture's dependencies exist.
    const repoDir = path.join(runner.workspaceDir, "repo");
    expect(existsSync(path.join(repoDir, "node_modules", "react"))).toBe(true);
    expect(existsSync(path.join(repoDir, "node_modules", "vite"))).toBe(true);

    // Leak assertions over the REAL process boundary (spec §15): the
    // PAT and the workspace token appear nowhere in the child's whole
    // stdout+stderr (which includes every logged git argv), nor in the
    // clone's .git/config.
    expect(runner.output()).not.toContain(PAT);
    expect(runner.output()).not.toContain(TOKEN);
    const gitConfig = await readFile(
      path.join(repoDir, ".git", "config"),
      "utf8",
    );
    expect(gitConfig).not.toContain(PAT);
    expect(gitConfig).toContain(served.cloneUrl);
  }, 300_000);
});