// Shared machinery for the pm2 install profiles (ecosystem.light.config.cjs,
// ecosystem.mac.light.config.cjs).
//
// A profile is a SUBSET of ecosystem.config.cjs, declared as names plus reasons. It never restates how
// a process is launched — `script` and `args` are read from the host file at load — because a
// hand-copied process list is exactly what failed here: the macOS list was written on 2026-07-28 and
// within days was starting a sidecar that had been split in two and pointing at a pty entry point that
// had moved. Neither failure said anything; the processes simply did not come up.
//
// So the rule is: ecosystem.config.cjs is the only place a launch command is written down, and a
// profile only decides which of them to run.
//
// Two consistency checks, both of which turn a silent breakage into a loud one at load:
//   1. a name the profile INCLUDES that the host no longer defines — the app was renamed or removed
//   2. an app the host defines that the profile neither includes nor excludes — a new sidecar, which
//      must be classified deliberately rather than defaulting to absent because nobody noticed
//
// The second is the one that matters over time. Without it, every sidecar added to the host silently
// stays out of every profile, and the profiles quietly stop meaning what their comments claim.

/**
 * @param {object} spec
 * @param {string} spec.file     this profile's filename, for error messages
 * @param {string[]} spec.include app names to run, in start order
 * @param {Record<string,string>} spec.excluded  app name → why it is not in this profile
 */
// The directory holding the platform's package.json, found by walking up from this file. Independent of
// where in the tree this config is kept, and of where pm2 was invoked from.
function repoRoot() {
  const { existsSync, readFileSync } = require('node:fs');
  const { dirname, join } = require('node:path');
  let dir = __dirname;
  for (;;) {
    const manifest = join(dir, 'package.json');
    if (existsSync(manifest)) {
      try {
        if (JSON.parse(readFileSync(manifest, 'utf8')).name === 'officer') return dir;
      } catch {
        // Unparseable is not ours; keep walking.
      }
    }
    const up = dirname(dir);
    if (up === dir) throw new Error("ecosystem.profile.cjs: could not find the platform's package.json above " + __dirname);
    dir = up;
  }
}

function defineProfile({ file, include, excluded }) {
  const full = require('./ecosystem.config.cjs');
  const byName = new Map(full.apps.map((app) => [app.name, app]));

  const missing = include.filter((name) => !byName.has(name));
  if (missing.length) {
    throw new Error(
      `${file}: ${missing.join(', ')} not found in ecosystem.config.cjs — the app was renamed or ` +
        `removed. Update this profile's include list.`,
    );
  }

  const unclassified = full.apps
    .map((app) => app.name)
    .filter((name) => !include.includes(name) && !(name in excluded));
  if (unclassified.length) {
    throw new Error(
      `${file}: ${unclassified.join(', ')} is in ecosystem.config.cjs but neither included nor ` +
        `excluded here. Add it to the include list, or to the excluded map with a reason.`,
    );
  }

  // `cwd` is pinned because Bun auto-loads .env from the working directory (and the pty sidecar does
  // `import 'dotenv/config'`). Without it, starting pm2 from anywhere but the repo root silently falls
  // back to the default PORT with no POSTGRES_URL.
  //
  // It also decides where the install is. src/servers/data-path.ts derives OFFICER_ROOT as the PARENT of
  // the working directory, and data/, capabilities/ and dockers/ hang off that — so a wrong cwd does not
  // fail, it relocates the whole install. `assertInstallLayout` is the boot check that catches it.
  //
  // This was `__dirname`, with a comment asserting "__dirname is the repo root — this file sits beside
  // ecosystem.config.cjs". That stopped being true the moment these files were moved into
  // ecosystem-files/, and nothing said so. Found by walking up to the package.json instead, which is
  // true wherever this file ends up living.
  return { apps: include.map((name) => ({ ...byName.get(name), cwd: repoRoot() })) };
}

module.exports = { defineProfile };