/**
 * @file member-claude.js
 * @description Server mode, one Linux user per account (S3): what AgentHub
 * keeps in step inside a MEMBER's own Claude Code config.
 *
 * - `setTheme`: the `theme` in `~/.claude/settings.json`, following the
 *   dark/light mode the member picked in AgentHub. Read through run-as's
 *   guarded reader (the file must be theirs) and written AS the member
 *   (`write-as`, merged, never replacing their other settings). A file that
 *   is not JSON is left alone.
 * - `applyPluginBaseline` (P6 fallback, opt-in): when the admin keeps a
 *   `plugin-baseline.json` beside `server.conf` (`/etc/agenthub/`, root's),
 *   runs `claude plugin marketplace add <source>` for each of its
 *   `marketplaces`, then `claude plugin install <name@marketplace>` for each
 *   of its `plugins`, AS the member (`sudo -u`, the shared `claude`), in the
 *   background. No file, nothing runs. An entry that could be read as an
 *   option is skipped, and `-y` is never passed, so a plugin that installs by
 *   running a marketplace-declared command fails rather than runs unseen.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

const fs = require("node:fs");
const path = require("node:path");
const { promisify } = require("node:util");
const runAs = require("./run-as");
const linux = require("./linux-accounts");

function setTheme(acct, theme) {
  const dir = path.join(acct.home, ".claude");
  const file = path.join(dir, "settings.json");
  let settings = {};
  try {
    settings = JSON.parse(runAs.readFileSafe(file, "utf8", { max: 1 << 20 }));
  } catch (err) {
    if (err.code !== "ENOENT") return false; // theirs to fix, not ours to overwrite
    runAs.mkdirAs(acct, dir);
  }
  if (!settings || typeof settings !== "object" || Array.isArray(settings)) return false;
  if (settings.theme === theme) return true;
  settings.theme = theme;
  runAs.writeFileAs(file, `${JSON.stringify(settings, null, 2)}\n`);
  return true;
}

// owner/repo, a git or https URL, an absolute path — never a leading `-`.
const MARKETPLACE_RE = /^[A-Za-z0-9/][^\s]{0,499}$/;
const PLUGIN_RE = /^[A-Za-z0-9][A-Za-z0-9._-]{0,99}@[A-Za-z0-9][A-Za-z0-9._-]{0,99}$/;

const baselinePath = () => path.join(path.dirname(linux.confPath()), "plugin-baseline.json");

// Test seam: async, a marketplace add is a git clone.
let execImpl = promisify(require("node:child_process").execFile);
function __setExecImpl(fn) {
  execImpl = fn;
}

/**
 * Install the admin's plugin baseline for `username`. Resolves to null when
 * there is nothing to do (outside S3, no baseline file, empty lists), else to
 * `[{item, ok, error?}]`, one per entry, in order. Throws on a baseline file
 * that is not JSON, or ENOTSHARED when `claude` is not in the shared tools.
 */
async function applyPluginBaseline(username) {
  const acct = linux.accountFor(username);
  if (!acct) return null;
  let raw;
  try {
    raw = fs.readFileSync(baselinePath(), "utf8");
  } catch {
    return null; // opt-in: no file, no baseline
  }
  const base = JSON.parse(raw);
  const list = (v) => (Array.isArray(v) ? v.map(String) : []);
  const steps = [
    ...list(base?.marketplaces).map((s) => [
      s,
      MARKETPLACE_RE,
      ["plugin", "marketplace", "add", s],
    ]),
    ...list(base?.plugins).map((p) => [p, PLUGIN_RE, ["plugin", "install", "--scope", "user", p]]),
  ];
  if (!steps.length) return null;
  const claude = require("./shared-tools").sharedPath("claude");
  if (!claude) {
    throw Object.assign(new Error("claude is not in the shared tools yet"), { code: "ENOTSHARED" });
  }
  const env = { HOME: acct.home, DISABLE_AUTOUPDATER: "1" };
  const results = [];
  for (const [item, re, args] of steps) {
    if (!re.test(item)) {
      results.push({ item, ok: false, error: "not a valid entry" });
      continue;
    }
    const [cmd, argv] = runAs.sudoArgv(acct, claude, args, env);
    try {
      await execImpl(cmd, argv, { cwd: acct.home, timeout: 300_000, encoding: "utf8" });
      results.push({ item, ok: true });
    } catch (e) {
      const why = String(e.stderr || e.message || "")
        .trim()
        .split("\n")
        .pop();
      results.push({ item, ok: false, error: why });
    }
  }
  for (const r of results) {
    const line = `[plugin-baseline] ${acct.login}: ${r.item} ${r.ok ? "ok" : `failed: ${r.error}`}`;
    (r.ok ? console.log : console.warn)(line);
  }
  return results;
}

module.exports = { setTheme, applyPluginBaseline, __setExecImpl };