// Tests for the guaranteed authoritative-validator step (#2163, Copilot).
//
// Two things are covered, and neither is reachable from an ordinary run on a
// machine that has a working, pinned CLI:
//
//   1. Which validator gets run. A local CLI is used only when it matches the
//      pin EXACTLY — accepting anything newer would mean a maintainer validates
//      against a different schema than CI, so the same `local:gate` could
//      disagree across machines, which is the failure a pin exists to prevent.
//   2. The orchestration around it. A regression in the probe, the spawn-error
//      branch, or the propagation of a rejected validator would otherwise leave
//      `test:scripts` green while this gate stopped gating.

import { test } from "node:test";
import assert from "node:assert/strict";
import { validatorCommand, runValidator } from "./verify-skills-cli.mjs";
import { PINNED_CLI_VERSION } from "./lib/skill-manifest.mjs";

const pinned = PINNED_CLI_VERSION.split(".").map(Number);
const npxArgs = [
  "-y",
  `@anthropic-ai/claude-code@${PINNED_CLI_VERSION}`,
  "plugin",
  "validate",
  ".claude/skills",
];

test("uses a local CLI only when it matches the pin exactly", () => {
  const cmd = validatorCommand({ version: pinned });
  assert.equal(cmd.command, "claude");
  assert.deepEqual(cmd.args, ["plugin", "validate", ".claude/skills"]);
  assert.match(cmd.via, /matches the pin/);
});

test("falls back to the pinned package for any other local version", () => {
  // Newer as well as older: a newer CLI is a DIFFERENT schema from CI's, which
  // is exactly the cross-machine disagreement the pin exists to prevent.
  for (const version of [
    [pinned[0], pinned[1], pinned[2] + 1],
    [pinned[0], pinned[1], pinned[2] - 1],
    [pinned[0] + 1, 0, 0],
    [2, 1, 232],
  ]) {
    const cmd = validatorCommand({ version });
    assert.equal(cmd.command, "npx", `expected npx for ${version.join(".")}`);
    assert.deepEqual(cmd.args, npxArgs);
    assert.match(cmd.via, /not the pinned/);
  }
});

test("falls back to the pinned package when no CLI is present", () => {
  const cmd = validatorCommand({ version: null });
  assert.equal(cmd.command, "npx");
  assert.deepEqual(cmd.args, npxArgs);
  assert.match(cmd.via, /no local CLI/);
});

/** Collects what `runValidator` was asked to spawn. */
function harness({ probe, spawnResult }) {
  const spawned = [];
  const logs = [];
  const errors = [];
  const code = runValidator({
    probe: () => probe,
    spawn: (command, args, opts) => {
      spawned.push({ command, args, opts });
      return spawnResult;
    },
    log: (m) => logs.push(m),
    error: (m) => errors.push(m),
  });
  return { code, spawned, logs, errors };
}

const okProbe = { status: 0, stdout: `${PINNED_CLI_VERSION} (Claude Code)\n` };

test("runs the local CLI and succeeds when the validator accepts", () => {
  const r = harness({ probe: okProbe, spawnResult: { status: 0 } });
  assert.equal(r.code, 0);
  assert.equal(r.spawned[0].command, "claude");
  assert.equal(r.errors.length, 0);
  assert.match(r.logs.join(), /validating \.claude\/skills via local claude/);
});

test("treats an unusable probe as no CLI at all", () => {
  // A `claude` that fails `--version` cannot be trusted to have the subcommand.
  for (const probe of [
    { error: new Error("ENOENT") },
    { status: 1, stdout: "" },
    { status: 0, stdout: "not a version" },
  ]) {
    const r = harness({ probe, spawnResult: { status: 0 } });
    assert.equal(r.code, 0);
    assert.equal(r.spawned[0].command, "npx");
  }
});

test("fails when the validator rejects the skills", () => {
  const r = harness({ probe: okProbe, spawnResult: { status: 1 } });
  assert.equal(r.code, 1);
  assert.match(r.errors.join(), /rejected the skills/);
});

test("fails when the validator cannot be spawned at all", () => {
  const r = harness({
    probe: okProbe,
    spawnResult: { error: new Error("spawn npx ENOENT") },
  });
  assert.equal(r.code, 1);
  assert.match(r.errors.join(), /could not run `claude`: spawn npx ENOENT/);
});