/**
 * @file Tests for the S3 members' synchronous hook (scripts/member-guard.js)
 * and the AI-session counter it shares with spawnRun (server/lib/ai-procs.js):
 * which Bash commands count as a test run or a container command, and which
 * processes count as one top-level AI session, read from a fake /proc.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const { describe, it } = require("node:test");
const assert = require("node:assert/strict");
const fs = require("node:fs");
const os = require("node:os");
const path = require("node:path");

const { isHeavy, guardTool } = require("../../scripts/member-guard.js");
const procs = require("../lib/ai-procs.js");

describe("member-guard: a test run or a container command", () => {
  const heavy = [
    "npx vitest run",
    "vitest",
    "npm test",
    "npm t",
    "npm run test:unit",
    "pnpm test",
    "yarn test --watch=false",
    "bun test",
    "cd client && NODE_ENV=test npx vitest related src/a.ts --run",
    "timeout 300 npx jest",
    "./vendor/bin/phpunit --filter Foo",
    "php artisan test",
    "vendor/bin/pest",
    "python -m pytest -q",
    "pytest tests/",
    "go test ./...",
    "cargo test",
    "docker compose up -d",
    "docker-compose up",
    "podman run alpine",
    "node_modules/.bin/playwright test",
    'bash -c "npm run e2e"',
    "make test",
    "npm run build && npm test 2>&1 | tail -20",
  ];
  const fine = [
    "npm run build",
    "npm install -D vitest",
    "git commit -m 'add vitest tests'",
    "rg -n docker src/",
    "cat tests/a.test.js",
    "ls node_modules/.bin/vitest",
    "echo run npm test later",
    "npx tsc -b",
    "npm run lint",
    "php artisan migrate:status",
    "go build ./...",
    "git log --grep test",
    "composer install",
  ];
  for (const c of heavy) it(`refuses: ${c}`, () => assert.equal(isHeavy(c), true));
  for (const c of fine) it(`allows: ${c}`, () => assert.equal(isHeavy(c), false));

  it("answers Claude Code with a PreToolUse deny and its reason, and nothing for the rest", () => {
    const out = [];
    const write = process.stdout.write;
    process.stdout.write = (s) => out.push(String(s));
    try {
      guardTool({ tool_name: "Bash", tool_input: { command: "npm test" } });
      guardTool({ tool_name: "Bash", tool_input: { command: "npm run build" } });
      guardTool({ tool_name: "Read", tool_input: { file_path: "/x" } });
    } finally {
      process.stdout.write = write;
    }
    assert.equal(out.length, 1);
    const o = JSON.parse(out[0]).hookSpecificOutput;
    assert.equal(o.hookEventName, "PreToolUse");
    assert.equal(o.permissionDecision, "deny");
    assert.match(o.permissionDecisionReason, /own machine/);
  });

  it("lets everything through once an admin allows tests", () => {
    const out = [];
    const write = process.stdout.write;
    process.stdout.write = (s) => out.push(String(s));
    try {
      guardTool({ tool_name: "Bash", tool_input: { command: "npx vitest run" } }, true);
    } finally {
      process.stdout.write = write;
    }
    assert.equal(out.length, 0);
  });
});

/** A fake /proc: one dir per pid with stat, cmdline; owner is this process (uid). */
function fakeProc(list) {
  const root = fs.mkdtempSync(path.join(os.tmpdir(), "ah-proc-"));
  for (const p of list) {
    const d = path.join(root, String(p.pid));
    fs.mkdirSync(d);
    // pid (comm) state ppid ... field 22 = starttime (index 19 after the ')')
    const fields = ["S", String(p.ppid), ...Array(17).fill("0"), String(p.start)];
    fs.writeFileSync(path.join(d, "stat"), `${p.pid} (x y) ${fields.join(" ")}`);
    fs.writeFileSync(path.join(d, "cmdline"), p.argv.join("\0") + "\0");
  }
  return root;
}

describe("member-policy: the admin's switch, read by the guard", () => {
  it("blocks tests without a file, and writes a world-readable one", () => {
    const dir = fs.mkdtempSync(path.join(os.tmpdir(), "ah-app-"));
    const prev = process.env.AGENTHUB_APP_ROOT;
    process.env.AGENTHUB_APP_ROOT = dir;
    try {
      const policy = require("../lib/member-policy.js");
      assert.equal(policy.read().allowTests, false);
      fs.writeFileSync(path.join(dir, policy.FILE), "not json");
      assert.equal(policy.read().allowTests, false);
      assert.equal(policy.setAllowTests(true).allowTests, true);
      const f = path.join(dir, policy.FILE);
      assert.equal(fs.statSync(f).mode & 0o777, 0o644);
      assert.equal(policy.read(f).allowTests, true);
      assert.equal(policy.setAllowTests(false).allowTests, false);
    } finally {
      if (prev === undefined) delete process.env.AGENTHUB_APP_ROOT;
      else process.env.AGENTHUB_APP_ROOT = prev;
    }
  });
});

describe("ai-procs: a member's top-level AI sessions", () => {
  const uid = process.getuid();
  const root = fakeProc([
    { pid: 10, ppid: 1, start: 1, argv: ["tmux"] },
    { pid: 11, ppid: 10, start: 5, argv: ["/opt/agenthub/tools/bin/claude", "--resume", "x"] },
    { pid: 12, ppid: 11, start: 6, argv: ["/bin/bash", "-c", "claude -p hi"] },
    { pid: 13, ppid: 12, start: 7, argv: ["claude", "-p", "hi"] }, // nested: not counted
    { pid: 20, ppid: 10, start: 3, argv: ["bash"] }, // a Terminal tab
    { pid: 21, ppid: 20, start: 4, argv: ["node", "/x/@openai/codex/bin/codex.js"] },
    { pid: 22, ppid: 21, start: 4, argv: ["/x/codex", "--yolo"] }, // Codex's native child
    { pid: 30, ppid: 10, start: 9, argv: ["omp", "auth-gateway", "serve"] }, // a server
    { pid: 31, ppid: 10, start: 8, argv: ["vitest"] },
  ]);

  it("counts each session once, oldest first, and no tool server", () => {
    assert.deepEqual(
      procs.sessionsOf(uid, root).map((s) => s.pid),
      [21, 11]
    );
  });
  it("finds the session a hook process runs under", () => {
    assert.equal(procs.sessionOf(13, root), 11);
    assert.equal(procs.sessionOf(31, root), null);
  });
  it("reads the limit from server.conf, 4 without it, 0 = off", () => {
    const conf = path.join(root, "server.conf");
    assert.equal(procs.sessionLimit(conf), 4);
    fs.writeFileSync(conf, "HOST_USER=x\nMAX_AI_SESSIONS=0\n");
    assert.equal(procs.sessionLimit(conf), 0);
  });
});