#!/usr/bin/env node
/**
 * @file Detached worker for the dashboard's "Update all" button. Runs the whole
 * batch and writes each step's outcome to `cc-update-all.json` in the runtime
 * directory as it goes, so the UI can follow along by polling.
 *
 * Order, and why:
 *   1. `claude plugin marketplace update` (no name = every marketplace) — a
 *      plugin update can only see a version its marketplace already knows about.
 *   2. `claude plugin update <id> -y` for every installed plugin EXCEPT the one
 *      the dashboard itself runs from.
 *   3. That one last, followed by `plugin-bootstrap.js --force` from the NEW
 *      cache directory — this stops the dashboard server and starts the
 *      replacement. Anything ordered after it would run while the server is
 *      down, which is exactly why it is last.
 *   4. `/reload-plugins` + `/reload-skills` typed into the live lane panes.
 *      Deliberately after everything: one reload picks up every pending change.
 *
 * Spawned detached precisely because step 3 kills its parent. It must never
 * throw its way out without a terminal journal entry — a silent death would
 * leave the UI polling a batch that says "running" forever.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const fs = require("fs");
const path = require("path");
const { execFileSync, spawnSync } = require("child_process");

const [, , runtimeDirArg, planJson] = process.argv;

const JOURNAL = path.join(runtimeDirArg || ".", "cc-update-all.json");
const LOG_FILE = path.join(runtimeDirArg || ".", "cc-update-all.log");

// Ids reach an argv, so they are re-validated here rather than trusted across
// the process boundary — same reasoning as scripts/plugin-update-helper.js.
const PLUGIN_SPEC_RE = /^[A-Za-z0-9][A-Za-z0-9._-]*(@[A-Za-z0-9][A-Za-z0-9._-]*)?$/;
const SAFE_NAME = /^[A-Za-z0-9][\w.-]*$/;
const SHELL_COMMANDS = new Set(["sh", "bash", "zsh", "fish", "dash", "ksh", "csh", "tcsh"]);

/** @type {{status: string, started_at: string, finished_at?: string, steps: object[]}} */
const state = { status: "running", started_at: new Date().toISOString(), steps: [] };

function log(line) {
  try {
    fs.appendFileSync(LOG_FILE, `[${new Date().toISOString()}] ${line}\n`);
  } catch {
    /* best effort */
  }
}

/** Persist after every transition — the UI polls this file, and the process can
 *  be SIGTERMed at step 3 without warning. */
function flush() {
  try {
    fs.mkdirSync(runtimeDirArg, { recursive: true });
    fs.writeFileSync(JOURNAL, JSON.stringify(state, null, 2));
  } catch {
    /* best effort */
  }
}

function addStep(key, label) {
  const step = { key, label, status: "running", started_at: new Date().toISOString() };
  state.steps.push(step);
  flush();
  return step;
}

function finishStep(step, status, extra = {}) {
  step.status = status;
  step.finished_at = new Date().toISOString();
  Object.assign(step, extra);
  flush();
}

function resolveClaude() {
  const candidates = ["claude", path.join(require("os").homedir(), ".local", "bin", "claude")];
  for (const cmd of candidates) {
    const probe = spawnSync(cmd, ["--version"], { stdio: "ignore", timeout: 20_000 });
    if (!probe.error && probe.status === 0) return cmd;
  }
  return null;
}

function run(cmd, args, timeout) {
  try {
    return runOnce(cmd, args, timeout);
  } catch (err) {
    // An older Claude Code rejects `-y` ("unknown option") and never prompts,
    // so the same command without the flag is the right retry.
    if (!args.includes("-y") || !/unknown option '-y'/.test(String(err.stderr || ""))) throw err;
    return runOnce(
      cmd,
      args.filter((a) => a !== "-y"),
      timeout
    );
  }
}

function runOnce(cmd, args, timeout) {
  log(`$ ${cmd} ${args.join(" ")}`);
  const out = execFileSync(cmd, args, {
    encoding: "utf8",
    timeout,
    maxBuffer: 10_000_000,
    stdio: ["ignore", "pipe", "pipe"],
  });
  if (out) log(out.trim().slice(0, 2000));
  return out;
}

/** Newest cache dir for the self plugin, excluding the one being replaced. */
function findNewRoot(marketplace, plugin, exclude) {
  const base = path.join(
    require("os").homedir(),
    ".claude",
    "plugins",
    "cache",
    marketplace,
    plugin
  );
  let entries;
  try {
    entries = fs.readdirSync(base, { withFileTypes: true }).filter((e) => e.isDirectory());
  } catch {
    return null;
  }
  const candidates = entries
    .map((e) => path.join(base, e.name))
    .filter((p) => p !== exclude)
    .filter((p) => fs.existsSync(path.join(p, "scripts", "plugin-bootstrap.js")))
    .map((p) => ({ p, mtime: fs.statSync(p).mtimeMs }))
    .sort((a, b) => b.mtime - a.mtime);
  return candidates.length ? candidates[0].p : null;
}

/**
 * Type the reload commands into every live `claude` lane pane. Uses tmux
 * directly rather than the server's lib: by this point the server may be a
 * different process than the one that started the batch.
 */
function reloadPanes() {
  const step = addStep("reload", "Reload open Claude Code sessions");
  let names;
  try {
    const out = execFileSync("tmux", ["list-sessions", "-F", "#{session_name}"], {
      encoding: "utf8",
      timeout: 15_000,
      stdio: ["ignore", "pipe", "pipe"],
    });
    names = out
      .split("\n")
      .map((s) => s.trim())
      .filter((s) => s.startsWith("agenthub-lane-"));
  } catch {
    // No tmux server at all means no open sessions — nothing to reload, which
    // is a normal outcome and not a batch failure.
    finishStep(step, "skipped", { note: "no tmux sessions are open" });
    return;
  }

  const reloaded = [];
  for (const name of names) {
    let paneCmd = null;
    try {
      paneCmd = execFileSync(
        "tmux",
        ["display-message", "-p", "-t", name, "#{pane_current_command}"],
        { encoding: "utf8", timeout: 15_000, stdio: ["ignore", "pipe", "pipe"] }
      ).trim();
    } catch {
      continue; // pane vanished between listing and probe
    }
    // A pane at a shell prompt has no REPL to reload; the text would be run as
    // a shell command instead.
    if (SHELL_COMMANDS.has(paneCmd)) continue;
    try {
      let first = true;
      for (const command of ["/reload-plugins", "/reload-skills"]) {
        // Let the first command actually submit before typing the second, or
        // both land on one composer line and Claude Code runs the pair as
        // `/reload-plugins /reload-skills` — see SETTLE_MS in
        // server/lib/cc-reload.js. Blocking is fine here: this worker is
        // detached and serves no requests.
        if (!first) execFileSync("sleep", ["1"], { timeout: 15_000 });
        first = false;
        execFileSync("tmux", ["send-keys", "-t", name, "-l", command], { timeout: 15_000 });
        execFileSync("tmux", ["send-keys", "-t", name, "Enter"], { timeout: 15_000 });
      }
      reloaded.push(name);
    } catch {
      /* pane died mid-send; the rest of the batch stands */
    }
  }
  finishStep(step, "ok", { lanes: reloaded, lanes_total: reloaded.length });
}

function main() {
  let plan;
  try {
    plan = JSON.parse(planJson);
  } catch {
    state.status = "failed";
    state.error = "unreadable plan";
    state.finished_at = new Date().toISOString();
    flush();
    return;
  }

  const claude = resolveClaude();
  if (!claude) {
    const step = addStep("resolve_claude", "Locate the claude CLI");
    finishStep(step, "failed", {
      error: "the `claude` CLI is not on this server's PATH; run the update from a terminal",
    });
    state.status = "failed";
    state.finished_at = new Date().toISOString();
    flush();
    return;
  }

  // 1. Every marketplace, in one call (no name = all).
  const mktStep = addStep("marketplaces", "Update all marketplaces");
  try {
    run(claude, ["plugin", "marketplace", "update"], 300_000);
    finishStep(mktStep, "ok");
  } catch (err) {
    // A marketplace that can't be refreshed (offline, auth) does not stop the
    // batch: the plugins may still have updates from the marketplaces that did.
    finishStep(mktStep, "failed", { error: String(err.stderr || err.message).slice(0, 2000) });
  }

  const self = plan.selfPlugin;
  const selfId = self ? `${self.plugin}@${self.marketplace}` : null;
  const others = (plan.plugins || []).filter((id) => PLUGIN_SPEC_RE.test(id) && id !== selfId);

  // 2. Every other plugin.
  for (const id of others) {
    const step = addStep(`plugin:${id}`, id);
    try {
      run(claude, ["plugin", "update", id, "-y"], 600_000);
      finishStep(step, "ok");
    } catch (err) {
      finishStep(step, "failed", { error: String(err.stderr || err.message).slice(0, 2000) });
    }
  }

  // 3. AgentHub itself, last — its bootstrap stops this server.
  if (self && SAFE_NAME.test(self.marketplace) && SAFE_NAME.test(self.plugin)) {
    const step = addStep(`plugin:${selfId}`, `${selfId} (this dashboard)`);
    try {
      run(claude, ["plugin", "update", selfId, "-y"], 600_000);
    } catch (err) {
      finishStep(step, "failed", { error: String(err.stderr || err.message).slice(0, 2000) });
      reloadPanes();
      state.status = "failed";
      state.finished_at = new Date().toISOString();
      flush();
      return;
    }
    const newRoot = findNewRoot(self.marketplace, self.plugin, plan.selfRoot);
    if (!newRoot) {
      // Nothing newer was published: the running server is correct as-is.
      finishStep(step, "ok", { note: "already on the newest version; server left running" });
    } else {
      // Mark the step done BEFORE the restart: bootstrap SIGTERMs us mid-call,
      // so a journal entry written afterwards may never be written at all.
      finishStep(step, "ok", { note: `restarting the dashboard from ${newRoot}`, restarted: true });
      reloadPanes();
      state.status = "done";
      state.finished_at = new Date().toISOString();
      flush();
      try {
        run(
          process.execPath,
          [path.join(newRoot, "scripts", "plugin-bootstrap.js"), "--force"],
          900_000
        );
      } catch (err) {
        log(`bootstrap failed: ${err.message}`);
        state.status = "failed";
        state.bootstrap_error = String(err.stderr || err.message).slice(0, 2000);
        state.note = "the old server was stopped; run /agenthub-update to recover";
        flush();
      }
      return;
    }
  }

  // 4. Reload, once, after every update.
  if (plan.reload !== false) reloadPanes();

  state.status = state.steps.some((s) => s.status === "failed") ? "partial" : "done";
  state.finished_at = new Date().toISOString();
  flush();
}

try {
  main();
} catch (err) {
  // A worker that dies without a terminal entry leaves the UI polling forever.
  state.status = "failed";
  state.error = err.message || String(err);
  state.finished_at = new Date().toISOString();
  flush();
}