/**
 * @file Tests scripts/launchd-service.js, the macOS LaunchAgent twin of the
 * systemd unit: the plist it writes (KeepAlive, AbandonProcessGroup so lane
 * panes survive a restart, the plugin root as WorkingDirectory), that writing
 * starts nothing, that a restart re-reads the plist (bootout + bootstrap, not
 * kickstart), and that a foreign plist is never touched. `launchctl` is
 * stubbed and the platform faked, so this runs on any OS.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const { describe, it, beforeEach, after } = 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 TMP_HOME = fs.mkdtempSync(path.join(os.tmpdir(), "agenthub-launchd-"));
const prevHome = process.env.HOME;
process.env.HOME = TMP_HOME;
const realPlatform = Object.getOwnPropertyDescriptor(process, "platform");
Object.defineProperty(process, "platform", { value: "darwin" });

const svc = require("../../scripts/launchd-service");

const DOMAIN = `gui/${process.getuid()}`;
const JOB = `${DOMAIN}/io.smartgift.agenthub`;

let calls = [];
let loaded = false;
let running = false;
let failBootstrap = false;
let noGui = false;

beforeEach(() => {
  calls = [];
  loaded = running = failBootstrap = noGui = false;
  fs.rmSync(svc.unitPath("agenthub"), { force: true });
  svc.__setExecImpl((args) => {
    if (args[0] === "print" && args[1] === DOMAIN) return { status: noGui ? 113 : 0 };
    calls.push(args.join(" "));
    if (args[0] === "print") {
      return {
        status: loaded ? 0 : 113,
        stdout: running ? "\tstate = running\n" : "\tstate = not running\n",
      };
    }
    if (args[0] === "bootstrap") return { status: failBootstrap ? 5 : 0 };
    return { status: 0 };
  });
});

after(() => {
  svc.__reset();
  Object.defineProperty(process, "platform", realPlatform);
  if (prevHome === undefined) delete process.env.HOME;
  else process.env.HOME = prevHome;
  fs.rmSync(TMP_HOME, { recursive: true, force: true });
});

const UNIT = {
  name: "agenthub",
  description: "AgentHub dashboard server (Claude Code plugin)",
  workingDir: "/plugin/root/new & improved",
  execStart: "/usr/local/bin/node /plugin/root/new/server/index.js",
  argv: ["/usr/local/bin/node", "/plugin/root/new & improved/server/index.js"],
  env: { NODE_ENV: "production", PATH: "/usr/bin:/bin" },
};

const plist = () => fs.readFileSync(svc.unitPath("agenthub"), "utf8");

describe("launchd-service — writeUserService", () => {
  it("writes a LaunchAgent that restarts forever and spares the lane panes, and starts nothing", () => {
    assert.equal(svc.writeUserService(UNIT), "written");
    const body = plist();
    assert.ok(svc.unitPath("agenthub").startsWith(path.join(TMP_HOME, "Library", "LaunchAgents")));
    assert.match(body, /<key>Label<\/key>\s*<string>io\.smartgift\.agenthub<\/string>/);
    assert.match(body, /<key>KeepAlive<\/key>\s*<true\/>/);
    assert.match(body, /<key>RunAtLoad<\/key>\s*<true\/>/);
    assert.match(body, /<key>AbandonProcessGroup<\/key>\s*<true\/>/);
    // argv stays split, so a path with a space is one argument; XML escaped.
    assert.match(body, /<string>\/plugin\/root\/new &amp; improved\/server\/index\.js<\/string>/);
    assert.match(body, /<key>PATH<\/key>\s*<string>\/usr\/bin:\/bin<\/string>/);
    assert.deepEqual(calls, [`enable ${JOB}`], "writing must not load or start the job");
  });

  it("leaves an identical plist alone", () => {
    svc.writeUserService(UNIT);
    calls = [];
    assert.equal(svc.writeUserService(UNIT), "unchanged");
    assert.deepEqual(calls, []);
  });

  it("never overwrites a plist it did not write", () => {
    fs.mkdirSync(path.dirname(svc.unitPath("agenthub")), { recursive: true });
    fs.writeFileSync(svc.unitPath("agenthub"), "<plist>theirs</plist>");
    assert.equal(svc.writeUserService(UNIT), "foreign");
    assert.equal(plist(), "<plist>theirs</plist>");
    assert.equal(svc.uninstallUserService("agenthub"), "foreign");
    assert.ok(fs.existsSync(svc.unitPath("agenthub")));
  });

  it("is unavailable without a GUI login, and writes nothing", () => {
    noGui = true;
    assert.equal(svc.systemctlAvailable(), false);
    assert.equal(svc.writeUserService(UNIT), "unavailable");
    assert.ok(!fs.existsSync(svc.unitPath("agenthub")));
  });
});

describe("launchd-service — stale and root", () => {
  it("reads the working directory back, escaped path included", () => {
    svc.writeUserService(UNIT);
    assert.equal(svc.unitRoot("agenthub"), UNIT.workingDir);
    assert.equal(svc.unitIsStale("agenthub", UNIT.workingDir), false);
    assert.equal(svc.unitIsStale("agenthub", "/plugin/root/newer"), true);
  });

  it("calls neither a missing nor a foreign plist stale", () => {
    assert.equal(svc.unitIsStale("agenthub", "/x"), false);
    fs.mkdirSync(path.dirname(svc.unitPath("agenthub")), { recursive: true });
    fs.writeFileSync(
      svc.unitPath("agenthub"),
      "<key>WorkingDirectory</key><string>/elsewhere</string>"
    );
    assert.equal(svc.unitIsStale("agenthub", "/x"), false);
    assert.equal(svc.unitRoot("agenthub"), "/elsewhere", "the pruner still must not delete it");
  });
});

describe("launchd-service — restart, install, uninstall", () => {
  it("restarts by bootout + bootstrap, so the new plist is what runs", () => {
    svc.writeUserService(UNIT);
    calls = [];
    assert.equal(svc.restartUserService("agenthub"), "restarted");
    assert.deepEqual(calls, [`bootout ${JOB}`, `bootstrap ${DOMAIN} ${svc.unitPath("agenthub")}`]);
  });

  it("reports a failed bootstrap, so the caller can fall back", () => {
    failBootstrap = true;
    assert.equal(svc.restartUserService("agenthub"), "failed");
  });

  it("install loads a new plist, and only kickstarts one already loaded", () => {
    assert.equal(svc.installUserService(UNIT), "written");
    assert.ok(calls.includes(`bootstrap ${DOMAIN} ${svc.unitPath("agenthub")}`));
    calls = [];
    loaded = true;
    assert.equal(svc.installUserService(UNIT), "unchanged");
    assert.ok(calls.includes(`kickstart ${JOB}`));
    assert.ok(!calls.some((c) => c.startsWith("bootout")), "a running dashboard is not bounced");
  });

  it("uninstall unloads and deletes our plist", () => {
    svc.writeUserService(UNIT);
    calls = [];
    assert.equal(svc.uninstallUserService("agenthub"), "removed");
    assert.deepEqual(calls, [`bootout ${JOB}`]);
    assert.ok(!fs.existsSync(svc.unitPath("agenthub")));
    assert.equal(svc.uninstallUserService("agenthub"), "absent");
  });

  it("is active only when launchd says the job is running", () => {
    assert.equal(svc.unitIsActive("agenthub"), false);
    loaded = true;
    assert.equal(svc.unitIsActive("agenthub"), false);
    running = true;
    assert.equal(svc.unitIsActive("agenthub"), true);
  });
});

describe("service-manager", () => {
  it("hands out the LaunchAgent on macOS", () => {
    delete require.cache[require.resolve("../../scripts/service-manager")];
    assert.equal(require("../../scripts/service-manager").kind, "launchd");
  });
});