#!/usr/bin/env node

// write-org-profile.mjs
// Purpose: atomically write the OKR org profile to the reinstall-surviving
// home path (~/.claude/okr/org/profil.md). On ANY write failure
// (EACCES/EROFS/ENOSPC/pathguard-block) it circuit-breaks to the
// project-local, gitignored .claude/okr.local.md so internal org state never
// reaches a public mirror. Never exits non-zero -- the calling command must
// not be blocked. Reads the full profile content from stdin (fd 0).
// Zero npm dependencies (node: builtins only). ASCII-clean identifiers.
//
// Mirrors the canonical home path defined in
// hooks/scripts/inject-okr-context.mjs:14 (the most-specific-wins read side).

import { readFileSync, writeFileSync, mkdirSync, renameSync, existsSync } from 'node:fs';
import { join, dirname } from 'node:path';
import { homedir } from 'node:os';

// Read the entire profile content from stdin. Under execFileSync (both Claude
// Code's command call and the tests) the child's stdin is a closed pipe, so
// EOF arrives immediately -- no hang.
let content = '';
try {
  content = readFileSync(0, 'utf8');
} catch {
  content = '';
}

const homeTarget = join(homedir(), '.claude', 'okr', 'org', 'profil.md');

// Atomic write: temp file in the SAME directory, then renameSync over the
// target. rename is atomic on the same filesystem -- a crash mid-write can
// never leave a half-written profil.md.
function writeAtomic(target, data) {
  const dir = dirname(target);
  mkdirSync(dir, { recursive: true });
  const tmp = join(dir, `profil.md.${process.pid}.tmp`);
  writeFileSync(tmp, data);
  renameSync(tmp, target);
}

// M4 (B2): the fallback target (.claude/okr.local.md) may already carry the
// FULL project config (cycle id, fase, onboarding, Linear). The circuit-breaker
// must never overwrite it -- merge instead: the incoming profile's frontmatter
// lines go FIRST inside ONE block (the flat parser is first-match, so the new
// profile wins per key), the existing frontmatter lines and body follow intact.
function mergeIntoExisting(target, incoming) {
  const prior = readFileSync(target, 'utf8');
  const incomingInner = (incoming.match(/^---\r?\n([\s\S]*?)\r?\n---/) || [])[1] ?? incoming.trim();
  const m = prior.match(/^---\r?\n([\s\S]*?)\r?\n---\r?\n?([\s\S]*)$/);
  if (!m) {
    // Existing file without frontmatter: preserve it verbatim as body.
    return `---\n${incomingInner}\n---\n${prior}`;
  }
  return `---\n${incomingInner}\n${m[1]}\n---\n${m[2]}`;
}

try {
  writeAtomic(homeTarget, content);
  process.stdout.write(homeTarget);
  process.exit(0);
} catch (err) {
  // Circuit-breaker: the home write failed. Fall back to the project-local,
  // gitignored config so org state stays off any public mirror. The cycle /
  // historikk tree remains cwd-bound regardless; only the profile migrates.
  const fallback = join(process.cwd(), '.claude', 'okr.local.md');
  try {
    writeAtomic(fallback, existsSync(fallback) ? mergeIntoExisting(fallback, content) : content);
    process.stderr.write(
      `notice: kunne ikke skrive hjem-profil (${err.code || err.message}); ` +
      `falt tilbake til prosjektlokal ${fallback}\n`,
    );
    process.stdout.write(fallback);
  } catch (err2) {
    process.stderr.write(
      `notice: kunne ikke skrive verken hjem-profil eller prosjektlokal fallback ` +
      `(${err2.code || err2.message})\n`,
    );
  }
  process.exit(0);
}