import test from "node:test";
import assert from "node:assert/strict";
import { spawn } from "node:child_process";
import { mkdtemp, readFile, rm } from "node:fs/promises";
import os from "node:os";
import path from "node:path";

const repoRoot = path.resolve(import.meta.dirname, "..");

function runStress(args) {
  return new Promise((resolve) => {
    const child = spawn(process.execPath, ["scripts/stress-remote-control.mjs", ...args], {
      cwd: repoRoot,
      env: process.env,
      stdio: ["ignore", "pipe", "pipe"],
    });
    let stdout = "";
    let stderr = "";
    child.stdout.setEncoding("utf8");
    child.stderr.setEncoding("utf8");
    child.stdout.on("data", (chunk) => {
      stdout += chunk;
    });
    child.stderr.on("data", (chunk) => {
      stderr += chunk;
    });
    child.on("close", (status) => {
      resolve({ status, stdout, stderr });
    });
  });
}

test("remote control stress script writes a reusable JSON report", async () => {
  const tempDir = await mkdtemp(path.join(os.tmpdir(), "boss-stress-report-test-"));
  const reportPath = path.join(tempDir, "remote-control-stress.json");
  try {
    const result = await runStress([
      "--chain-tasks=4",
      "--runtime-tasks=6",
      "--runtime-concurrency=3",
      "--timeout-ms=20000",
      `--report-json=${reportPath}`,
    ]);

    assert.equal(result.status, 0, result.stderr || result.stdout);
    const report = JSON.parse(await readFile(reportPath, "utf8"));
    assert.equal(report.ok, true);
    assert.equal(report.options.chainTasks, 4);
    assert.equal(report.options.runtimeTasks, 6);
    assert.match(report.startedAt, /^\d{4}-\d{2}-\d{2}T/);
    assert.match(report.finishedAt, /^\d{4}-\d{2}-\d{2}T/);
    assert.ok(report.durationMs >= 0);
    assert.equal(report.summaries.length, 2);
    assert.equal(report.summaries[0].missing, 0);
    assert.equal(report.summaries[1].failed, 0);
  } finally {
    await rm(tempDir, { recursive: true, force: true });
  }
});

test("remote control stress script fails when latency budget is exceeded", async () => {
  const result = await runStress([
    "--chain-tasks=4",
    "--skip-runtime",
    "--timeout-ms=20000",
    "--max-chain-p95-ms=1",
  ]);

  assert.notEqual(result.status, 0);
  const report = JSON.parse(result.stdout);
  assert.equal(report.ok, false);
  assert.equal(report.thresholdFailures.length, 1);
  assert.equal(report.thresholdFailures[0].name, "chain_p95_latency");
});