#!/usr/bin/env -S bun --no-env-file --config=/dev/null
/**
 * gstack-owner-brief — the one-page owner brief at the autoplan gate (plan E3).
 *
 *   gstack-owner-brief render --out <dir> [--page N] [--summary <file>] [--write] [--json]
 *   gstack-owner-brief render --captain --out <dir> [--captain-name <name>] [--allow-incomplete] [--write] [--json]
 *   gstack-owner-brief close  --out <dir> --plan <file> [--date YYYY-MM-DD] [--json]
 *
 * `render` prints the plain-language summary (--summary <file>, else <dir>/summary.md
 * when present, else counted from the artifacts), the URGENT block and the numbered
 * decisions (gate list, seven per page, stable ids; auto items show the default
 * taken if unanswered, approval items stay pending) and points at review-record.md
 * for the full review; --write also saves brief.md in the run directory.
 * `render --captain` prints the plan ask in the shape Capy Captains relay (lib/captain-brief.ts): header with
 * the "do it" reply, Before → after, Why it matters, What caused this work, Big decisions, What we need from
 * you (the lettered ask lines of docs/captain.md § The ask format, headed by --captain-name), and one
 * trailing line for the relaying agent; a plan missing a section exits 1
 * (CAPTAIN_BRIEF_INCOMPLETE) unless --allow-incomplete. --write saves captain-brief.md.
 * `close` rewrites every `draft direction stands until the owner decides` line in
 * the plan to the decided option and date; pending lines stay and are reported
 * (DRAFT_DIRECTION_UNRESOLVED, exit 1). Logic: lib/owner-brief.ts.
 */
import * as fs from 'node:fs';
import * as path from 'node:path';
import { EXIT, exitTableHelp } from '../lib/headless-artifacts';
import { renderCaptainBrief } from '../lib/captain-brief';
import { BRIEF_FILE, closeDraftDirectionsFile, loadBriefInputs, renderBrief } from '../lib/owner-brief';
import { resultLine } from '../lib/result-codes';

const HELP = `gstack-owner-brief — one page for the owner: summary, URGENT block, numbered decisions (docs/unattended.md#owner-brief)

  render --out <dir> [--page N] [--summary <file>] [--write] [--json]
  render --captain --out <dir> [--captain-name <name>] [--allow-incomplete] [--write] [--json]   the plan ask for a Capy Captain (capy/skill/gstack/captain.md); --captain-name heads the lettered ask
  close  --out <dir> --plan <file> [--date YYYY-MM-DD] [--json]

${exitTableHelp()}`;

function flag(args: string[], name: string): string | undefined {
  const i = args.indexOf(name);
  return i >= 0 ? args[i + 1] : undefined;
}

function main(argv: string[]): number {
  const [cmd, ...rest] = argv;
  if (!cmd || cmd === '--help' || cmd === '-h') { process.stdout.write(HELP + '\n'); return cmd ? EXIT.ok : EXIT.usage; }
  const out = flag(rest, '--out');
  if (!out) { process.stderr.write(`gstack-owner-brief: ${cmd} needs --out <dir>\n${HELP}\n`); return EXIT.usage; }
  const loaded = loadBriefInputs(path.resolve(out));
  if ('error' in loaded) { process.stderr.write(resultLine(`gstack-owner-brief ${cmd}`, loaded.error.code, loaded.error.message) + '\n'); return loaded.error.code === 'BRIEF_INPUT_MISSING' ? EXIT.refused : EXIT.fail; }
  const json = rest.includes('--json');

  if (cmd === 'render' && rest.includes('--captain')) {
    const brief = renderCaptainBrief(loaded.inputs, { outDir: path.resolve(out), captainName: flag(rest, '--captain-name') });
    if (rest.includes('--write')) fs.writeFileSync(path.join(path.resolve(out), 'captain-brief.md'), brief.text);
    if (json) process.stdout.write(JSON.stringify({ run: loaded.inputs.gate.run, gate_rev: loaded.inputs.gate.gate_rev, rec_hash: brief.recHash, pending: brief.pending, missing: brief.missing, brief: brief.text }) + '\n');
    else process.stdout.write(brief.text);
    if (!brief.missing.length || !brief.pending) return EXIT.ok;
    process.stderr.write(resultLine('gstack-owner-brief render --captain', 'CAPTAIN_BRIEF_INCOMPLETE', `missing: ${brief.missing.join(', ')}`) + '\n');
    return rest.includes('--allow-incomplete') ? EXIT.ok : EXIT.fail;
  }
  if (cmd === 'render') {
    const pageText = flag(rest, '--page');
    if (pageText !== undefined && !/^[0-9]+$/.test(pageText)) { process.stderr.write('gstack-owner-brief: --page needs a number\n'); return EXIT.usage; }
    const summaryFile = flag(rest, '--summary') ?? (fs.existsSync(path.join(path.resolve(out), 'summary.md')) ? path.join(path.resolve(out), 'summary.md') : undefined);
    const summary = summaryFile ? fs.readFileSync(summaryFile, 'utf8') : undefined;
    const brief = renderBrief(loaded.inputs, { page: pageText ? Number(pageText) : 1, summary, outDir: path.resolve(out) });
    if (rest.includes('--write')) fs.writeFileSync(path.join(path.resolve(out), BRIEF_FILE), brief);
    if (json) process.stdout.write(JSON.stringify({ run: loaded.inputs.gate.run, gate_rev: loaded.inputs.gate.gate_rev, items: loaded.inputs.gate.items.length, brief }) + '\n');
    else process.stdout.write(brief);
    return EXIT.ok;
  }
  if (cmd === 'close') {
    const plan = flag(rest, '--plan');
    if (!plan || !fs.existsSync(plan)) { process.stderr.write(`gstack-owner-brief: close needs --plan <existing file>\n`); return EXIT.usage; }
    const date = flag(rest, '--date');
    if (date !== undefined && !/^\d{4}-\d{2}-\d{2}$/.test(date)) { process.stderr.write('gstack-owner-brief: --date needs YYYY-MM-DD\n'); return EXIT.usage; }
    const result = closeDraftDirectionsFile(plan, loaded.inputs, date);
    if (json) process.stdout.write(JSON.stringify({ plan, rewrites: result.rewrites, unresolved: result.unresolved.length }) + '\n');
    else {
      for (const r of result.rewrites) process.stdout.write(`DRAFT_DIRECTION: line ${r.line} ${r.id ?? '(no id)'} ${r.status}\n`);
      process.stdout.write(`DRAFT_DIRECTIONS: rewritten=${result.rewrites.length - result.unresolved.length} unresolved=${result.unresolved.length} plan=${plan}\n`);
    }
    for (const r of result.unresolved) process.stderr.write(resultLine('gstack-owner-brief close', 'DRAFT_DIRECTION_UNRESOLVED', `line ${r.line}: ${r.status === 'unknown_id' ? 'no decision id on the line and no plan approval item' : `${r.id} pending`}`) + '\n');
    return result.unresolved.length ? EXIT.fail : EXIT.ok;
  }
  process.stderr.write(`gstack-owner-brief: unknown command ${cmd}\n${HELP}\n`);
  return EXIT.usage;
}

process.exitCode = main(process.argv.slice(2));