#!/usr/bin/env node
// plan-skill-op.mjs — Spor B / B3 CLI: GATED DRY-RUN for skill-lifecycle ops.
//
// Ships merge_skills (S16) + sanitize_skill + retire_skill (S17). Each dry-run
// loads refs/orphans/taxonomy READ-ONLY, plans the op, prints the full diff +
// guardrail, and with --write records a PENDING entry in decisions.json (the
// operator gate's queue). It NEVER writes under skills/ — the destructive apply
// is a separate approved step. Verify after a run: `git status skills/` clean.
//
// Usage:
//   node scripts/kb-eval/plan-skill-op.mjs merge    <absorber> <absorbed> [--json] [--write [--date YYYY-MM-DD]]
//   node scripts/kb-eval/plan-skill-op.mjs sanitize <skill>              [--json] [--write [--date YYYY-MM-DD]]
//   node scripts/kb-eval/plan-skill-op.mjs retire   <skill> [--hard]     [--json] [--write [--date YYYY-MM-DD]]

import { readFileSync, readdirSync, existsSync } from 'node:fs';
import { join, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';
import { splitFrontmatter, extractDescription } from './eval.mjs';
import { loadTaxonomy } from '../kb-update/lib/taxonomy.mjs';
import { runMergePlan, runSanitizePlan, runRetirePlan, runCreatePlan, TEST_DOMAIN_SPEC } from './lib/skill-ops.mjs';

const __dirname = dirname(fileURLToPath(import.meta.url));
const PLUGIN_ROOT = join(__dirname, '..', '..');
const SKILLS_DIR = join(PLUGIN_ROOT, 'skills');
const AGENTS_DIR = join(PLUGIN_ROOT, 'agents');
const LEDGER_DATA_DIR = join(__dirname, '..', 'kb-update', 'data');
const TAX_DATA_DIR = LEDGER_DATA_DIR;
const PROMPTS_FILE = join(__dirname, 'data', 'k1-trigger-prompts.json');

/** Read the SKILL.md descriptions from disk (read-only). */
function loadDescriptions() {
  const out = {};
  for (const e of readdirSync(SKILLS_DIR, { withFileTypes: true })) {
    if (!e.isDirectory()) continue;
    const md = join(SKILLS_DIR, e.name, 'SKILL.md');
    if (!existsSync(md)) continue;
    out[e.name] = extractDescription(splitFrontmatter(readFileSync(md, 'utf8')).frontmatter);
  }
  return out;
}

/** Read the curated K1 trigger-prompt set (boundary-tension source for K10). */
function loadPromptSet() {
  return existsSync(PROMPTS_FILE) ? JSON.parse(readFileSync(PROMPTS_FILE, 'utf8')) : {};
}

function printPlan({ entry, diff, guardrail }) {
  const g = guardrail;
  console.log(`\nmerge_skills — DRY-RUN: ${entry.targets.absorbed}  ->  ${entry.targets.absorber}\n`);
  console.log(`Guardrail (ingen kuratert verdi tapt):`);
  console.log(`  absorber-refs=${g.preCountAbsorber}  absorbed-refs=${g.preCountAbsorbed}  forventet post=${g.expectedPostCount}  faktisk post=${g.postCount}`);
  console.log(`  count-invariant=${g.countInvariant}  set-equality=${g.setEquality}  kollisjoner=${g.collisions.length ? g.collisions.join(', ') : '0'}`);
  console.log(`  => ${g.ok ? 'OK (trygt å merge)' : 'FAILED (ville tapt/klobret innhold — blokkert)'}\n`);
  console.log(`Diff:`);
  console.log(`  fil-flytt: ${diff.fileMoves.length} (alle ${entry.targets.absorbed}/references/* -> ${entry.targets.absorber}/references/*)`);
  if (diff.taxonomyReassignments.length) {
    console.log(`  taksonomi-reassign:`);
    for (const t of diff.taxonomyReassignments) console.log(`    • ${t.category}: ${t.from} -> ${t.to}`);
  }
  console.log(`  retire: ${diff.retire}`);
  console.log(`  description-reconciliation: MANUELL (planner auto-merger aldri semantisk scope)`);
  console.log(`    ${entry.targets.absorber}: ${diff.descriptionReconciliation.absorber?.slice(0, 80) ?? '(mangler)'}…`);
  console.log(`    ${entry.targets.absorbed}: ${diff.descriptionReconciliation.absorbed?.slice(0, 80) ?? '(mangler)'}…\n`);
  console.log(`Status: ${entry.status} (forslag — anvender INGENTING; krever operatør-godkjenning + apply-sesjon).\n`);
}

function printSanitizePlan({ entry, diff, guardrail }) {
  const g = guardrail;
  console.log(`\nsanitize_skill — DRY-RUN: ${entry.targets.skill}\n`);
  console.log(`Guardrail (kun dødt innhold; aldri kuratert):`);
  console.log(`  refs=${g.preCount}  dead(orphan)=${g.deadCount}  fjernes=${g.removalCount}  kuratert-beholdt=${g.curatedCount}  post=${g.postCount}`);
  console.log(`  ulovlige-fjerninger(kuratert)=${g.illegalRemovals.length ? g.illegalRemovals.join(', ') : '0'}  manglende=${g.missingRemovals.length ? g.missingRemovals.join(', ') : '0'}`);
  console.log(`  => ${g.ok ? 'OK (trygt å sanere)' : 'FAILED (ville rørt kuratert/manglende innhold — blokkert)'}\n`);
  console.log(`Diff — fjernes (${diff.removals.length}):`);
  for (const r of diff.removals.slice(0, 20)) console.log(`    • ${r.path}`);
  if (diff.removals.length > 20) console.log(`    … +${diff.removals.length - 20} til`);
  console.log(`  beholdt (kuratert): ${diff.retainedCount}\n`);
  console.log(`Status: ${entry.status} (forslag — anvender INGENTING; krever operatør-godkjenning + apply-sesjon).\n`);
}

function printRetirePlan({ entry, diff, guardrail }) {
  const g = guardrail;
  console.log(`\nretire_skill — DRY-RUN: ${entry.targets.skill}\n`);
  console.log(`Guardrail (obligatorisk arkivering; aldri hard delete):`);
  console.log(`  refs=${g.refCount}  forventet-arkivert=${g.expectedArchiveCount} (refs + SKILL.md)  faktisk-arkivert=${g.archivedCount}`);
  console.log(`  arkiv-mål=${g.archiveDir ?? '(ingen)'}  hard-delete-bedt=${g.hardDeleteRequested}`);
  console.log(`  => ${g.ok ? 'OK (arkivert — trygt å pensjonere)' : 'FAILED (hard delete uten arkiv — blokkert)'}\n`);
  console.log(`Diff:`);
  console.log(`  arkiv-flytt: ${diff.archiveMoves.length} (alle skills/${entry.targets.skill}/* -> ${g.archiveDir}/*)`);
  console.log(`  fjern katalog: ${diff.removeSkillDir}`);
  if (diff.taxonomyOrphaned.length) {
    console.log(`  taksonomi forelder-løs (manuell reassign):`);
    for (const t of diff.taxonomyOrphaned) console.log(`    • ${t.category} (var eid av ${t.wasOwner})`);
  }
  console.log(`\nStatus: ${entry.status} (forslag — anvender INGENTING; krever operatør-godkjenning + apply-sesjon).\n`);
}

function printCreatePlan({ entry, scaffold, guardrail }) {
  const g = guardrail;
  console.log(`\ncreate_skill — DRY-RUN: ${entry.targets.name}\n`);
  console.log(`Guardrail (konstruktiv — født compliant ELLER nektet):`);
  console.log(
    `  navn-ledig=${g.nameAvailable}  K2=${g.k2.pass}  K3=${g.k3.pass}  K5=${g.k5.pass}  ` +
      `K6=${g.k6.pass}  refTall=${g.refConsistency.consistent}  K10=${g.k10.pass}`,
  );
  console.log(`  feilede=${g.failed.length ? g.failed.join(', ') : '0'}`);
  console.log(`  => ${g.ok ? 'OK (scaffold passerer K1–K10 deterministisk — trygt å opprette)' : 'FAILED (sub-bar skill — blokkert)'}\n`);
  console.log(`Scaffold:`);
  console.log(`  ${scaffold.skillMd.path}`);
  console.log(`  ref-filer: ${scaffold.files.length}`);
  for (const f of scaffold.files) console.log(`    • ${f.path}`);
  if (scaffold.taxonomyAdditions.length) {
    console.log(`  taksonomi-tillegg (additivt):`);
    for (const t of scaffold.taxonomyAdditions) console.log(`    • ${t.category} -> ${t.skill}`);
  }
  console.log(`\nStatus: ${entry.status} (forslag — anvender INGENTING; krever operatør-godkjenning + apply-sesjon).\n`);
}

const USAGE =
  'Usage:\n' +
  '  node scripts/kb-eval/plan-skill-op.mjs merge    <absorber> <absorbed> [--json] [--write [--date YYYY-MM-DD]]\n' +
  '  node scripts/kb-eval/plan-skill-op.mjs sanitize <skill>              [--json] [--write [--date YYYY-MM-DD]]\n' +
  '  node scripts/kb-eval/plan-skill-op.mjs retire   <skill> [--hard]     [--json] [--write [--date YYYY-MM-DD]]\n' +
  '  node scripts/kb-eval/plan-skill-op.mjs create   <name>               [--json] [--write [--date YYYY-MM-DD]]';

function main() {
  const args = process.argv.slice(2);
  const op = args[0];
  const positional = args.filter((a) => !a.startsWith('--'));
  const jsonOut = args.includes('--json');
  const doWrite = args.includes('--write');
  const hardDelete = args.includes('--hard');
  const dateIdx = args.indexOf('--date');
  const decided_at = doWrite ? (dateIdx >= 0 ? args[dateIdx + 1] : new Date().toISOString().slice(0, 10)) : null;

  let result;
  let printer;
  let label;

  if (op === 'merge' && positional.length >= 3) {
    const [, absorber, absorbed] = positional;
    result = runMergePlan(absorber, absorbed, {
      skillsDir: SKILLS_DIR,
      dataDir: LEDGER_DATA_DIR,
      write: doWrite,
      decided_at,
      descriptions: loadDescriptions(),
      categorySkill: loadTaxonomy(TAX_DATA_DIR).category_skill,
    });
    printer = printPlan;
    label = 'merge_skills';
  } else if (op === 'sanitize' && positional.length >= 2) {
    result = runSanitizePlan(positional[1], {
      skillsDir: SKILLS_DIR,
      agentsDir: AGENTS_DIR,
      dataDir: LEDGER_DATA_DIR,
      write: doWrite,
      decided_at,
    });
    printer = printSanitizePlan;
    label = 'sanitize_skill';
  } else if (op === 'retire' && positional.length >= 2) {
    result = runRetirePlan(positional[1], {
      skillsDir: SKILLS_DIR,
      dataDir: LEDGER_DATA_DIR,
      write: doWrite,
      decided_at,
      hardDelete,
      categorySkill: loadTaxonomy(TAX_DATA_DIR).category_skill,
    });
    printer = printRetirePlan;
    label = 'retire_skill';
  } else if (op === 'create' && positional.length >= 2) {
    result = runCreatePlan(positional[1], {
      skillsDir: SKILLS_DIR,
      dataDir: LEDGER_DATA_DIR,
      write: doWrite,
      decided_at,
      ...TEST_DOMAIN_SPEC,
      existingDescriptions: loadDescriptions(),
      promptSet: loadPromptSet(),
    });
    printer = printCreatePlan;
    label = 'create_skill';
  } else {
    console.error(USAGE);
    process.exit(2);
  }

  if (jsonOut) {
    process.stdout.write(JSON.stringify(result) + '\n');
    return;
  }
  printer(result);
  if (doWrite) console.log(`(Pending ${label}-entry skrevet til decisions.json — 0 skriving til skills/.)\n`);
}

if (process.argv[1] && fileURLToPath(import.meta.url) === process.argv[1]) {
  main();
}