#!/usr/bin/env node
// apply-skill-op.mjs — Spor B / B3 (Sesjon 18) CLI: the DESTRUCTIVE apply-path.
//
// Executes an operator-APPROVED (status:approved) skill-lifecycle entry from
// decisions.json into a real skills/ mutation: sanitize_skill + retire_skill
// (single-skill, S18) and merge_skills (cross-skill, S19). create_skill comes last.
//
// Two gates, in order: (1) the entry must already be status:approved in the
// ledger (the operator's sign-off on a prior `plan-skill-op … --write` dry-run);
// (2) this CLI mutates skills/ ONLY with --apply. Without --apply it is a PREVIEW
// that re-plans from fresh disk, revalidates (drift-safe), and mutates nothing.
//
// sanitize/retire archive every file under archive/ BEFORE removing it. merge
// RELOCATES the absorbed skill's references under the absorber, persists the
// taxonomy ownership repoint, then archives the absorbed SKILL.md + removes its
// dir. Apply flips the ledger entry approved -> applied. Verify: `git status`.
//
// Usage:
//   node scripts/kb-eval/apply-skill-op.mjs list
//   node scripts/kb-eval/apply-skill-op.mjs sanitize <skill> [--apply] [--date YYYY-MM-DD]
//   node scripts/kb-eval/apply-skill-op.mjs retire   <skill> [--apply] [--date YYYY-MM-DD]
//   node scripts/kb-eval/apply-skill-op.mjs merge    <absorber> <absorbed> [--apply] [--date YYYY-MM-DD]

import { readFileSync, readdirSync, existsSync } from 'node:fs';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';
import { splitFrontmatter, extractDescription } from './eval.mjs';
import { loadTaxonomy } from '../kb-update/lib/taxonomy.mjs';
import { loadDecisions, listActions, actionKey } from '../kb-update/lib/decisions-io.mjs';
import {
  applyApprovedAction,
  SANITIZE_OPERATION,
  RETIRE_OPERATION,
  MERGE_OPERATION,
  CREATE_OPERATION,
  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 PROMPTS_FILE = join(__dirname, 'data', 'k1-trigger-prompts.json');

const OP_BY_VERB = {
  sanitize: SANITIZE_OPERATION,
  retire: RETIRE_OPERATION,
  merge: MERGE_OPERATION,
  create: CREATE_OPERATION,
};

/** Read the SKILL.md descriptions from disk (read-only) — create's K10 siblings. */
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')) : {};
}

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

/** List approved actions awaiting apply (operator's apply queue). */
function listApproved() {
  const led = loadDecisions(LEDGER_DATA_DIR);
  const approved = listActions(led, 'approved');
  const applied = listActions(led, 'applied');
  console.log(`\nGodkjente handlinger som venter på apply (${approved.length}):`);
  if (!approved.length) console.log('  (ingen — kjør plan-skill-op … --write og sett status:approved i decisions.json)');
  for (const a of approved) {
    const t = a.targets ?? {};
    const tgt = t.skill ?? t.name ?? `${t.absorbed} -> ${t.absorber}`;
    console.log(`  • ${a.operation_type}: ${tgt}  [guardrail ${a.guardrail?.ok ? 'OK' : 'FAILED'}]`);
  }
  if (applied.length) console.log(`\nAllerede anvendt (${applied.length}): ${applied.map((a) => actionKey(a)).join(', ')}`);
  console.log('');
}

function printResult(res, verb, label, apply) {
  const r = res.revalidate;
  console.log(`\n${verb} — ${apply ? 'APPLY' : 'PREVIEW'}: ${label}\n`);
  console.log(`Revalidering (mot fersk disk):`);
  console.log(`  fersk-guardrail-ok=${r.freshOk}  drift=${r.drift}  => ${r.ok ? 'OK' : 'BLOKKERT'}`);
  if (r.reason) console.log(`  grunn: ${r.reason}`);
  if (!res.applied) {
    if (res.preview && r.ok) {
      const d = res.plan?.diff ?? {};
      if (verb === 'merge') {
        console.log(
          `\n  Ville flyttet ${d.fileMoves?.length ?? 0} ref-fil(er) -> absorber, reassignet ` +
            `${d.taxonomyReassignments?.length ?? 0} kategori(er), arkivert absorbed-SKILL.md. ` +
            `Kjør på nytt med --apply for å eksekvere.`,
        );
      } else if (verb === 'create') {
        const sc = res.plan?.scaffold ?? {};
        console.log(
          `\n  Ville opprettet skills/${label}/ — 1 SKILL.md + ${sc.files?.length ?? 0} ref-fil(er), ` +
            `${sc.taxonomyAdditions?.length ?? 0} taksonomi-tillegg. Kjør på nytt med --apply for å eksekvere.`,
        );
      } else {
        const n = verb === 'sanitize' ? (d.removals?.length ?? 0) : (d.archiveMoves?.length ?? 0);
        console.log(`\n  Ville arkivert+fjernet ${n} fil(er). Kjør på nytt med --apply for å eksekvere.`);
      }
    }
    console.log(`\nStatus: INGEN mutasjon utført.${res.preview && r.ok ? '' : ' (revalidering blokkerte eller ingen --apply.)'}\n`);
    return;
  }
  const rep = res.report;
  console.log(`\nUtført:`);
  if (rep.op === MERGE_OPERATION) {
    console.log(`  flyttet: ${rep.refMoves} ref-fil(er) -> absorber`);
    console.log(`  taksonomi: ${rep.taxonomyReassignments} kategori(er) reassignet + persistert`);
    if (rep.archivedSkillMd) console.log(`  arkivert: ${rep.archivedSkillMd}`);
  } else if (rep.op === CREATE_OPERATION) {
    console.log(`  opprettet: ${rep.filesWritten} fil(er) under ${rep.createdDir} (1 SKILL.md + ${rep.filesWritten - 1} ref-filer)`);
    console.log(`  taksonomi: ${rep.taxonomyAdditions} tillegg (additivt)`);
  } else {
    console.log(`  arkivert: ${rep.moves} fil(er) -> archive/`);
  }
  if (rep.removedDir) console.log(`  fjernet katalog: ${rep.removedDir}`);
  console.log(`  ledger: ${actionKey({ operation_type: rep.op, targets: rep.target })} -> ${rep.ledgerStatus}`);
  console.log(`\nStatus: APPLIED. Verifiser med 'git status' og re-kjør validate/kb-integrity/kb-eval.\n`);
}

function main() {
  const args = process.argv.slice(2);
  const verb = args[0];
  if (verb === 'list') return listApproved();

  const positional = args.filter((a) => !a.startsWith('--'));
  const apply = args.includes('--apply');
  const dateIdx = args.indexOf('--date');
  const decided_at = dateIdx >= 0 ? args[dateIdx + 1] : new Date().toISOString().slice(0, 10);

  const op = OP_BY_VERB[verb];
  if (!op) {
    console.error(USAGE);
    process.exit(2);
  }

  // Resolve targets + ledger key per op arity (merge takes two skills; create
  // is keyed on its new name; sanitize/retire on their one skill).
  let targets, label;
  if (op === MERGE_OPERATION) {
    if (positional.length < 3) {
      console.error(USAGE);
      process.exit(2);
    }
    targets = { absorber: positional[1], absorbed: positional[2] };
    label = `${targets.absorbed} -> ${targets.absorber}`;
  } else if (op === CREATE_OPERATION) {
    if (positional.length < 2) {
      console.error(USAGE);
      process.exit(2);
    }
    targets = { name: positional[1] };
    label = positional[1];
  } else {
    if (positional.length < 2) {
      console.error(USAGE);
      process.exit(2);
    }
    targets = { skill: positional[1] };
    label = positional[1];
  }
  const key = actionKey({ operation_type: op, targets });

  const led = loadDecisions(LEDGER_DATA_DIR);
  const entry = led.actions?.[key];
  if (!entry) {
    console.error(`Fant ingen ledger-handling "${key}". Kjør 'apply-skill-op.mjs list' for å se godkjente.`);
    process.exit(1);
  }
  if (entry.status !== 'approved') {
    console.error(`Handling "${key}" har status "${entry.status}" (må være "approved"). Avbryter.`);
    process.exit(1);
  }

  // retire + merge both consult the taxonomy (owned-category awareness / repoint);
  // create re-supplies its scaffold spec + K10 siblings for drift-safe revalidation.
  const needsTaxonomy = op === RETIRE_OPERATION || op === MERGE_OPERATION;
  const isCreate = op === CREATE_OPERATION;
  const res = applyApprovedAction(entry, {
    pluginRoot: PLUGIN_ROOT,
    skillsDir: SKILLS_DIR,
    agentsDir: AGENTS_DIR,
    dataDir: LEDGER_DATA_DIR,
    taxonomyDataDir: LEDGER_DATA_DIR,
    apply,
    decided_at: apply ? decided_at : null,
    categorySkill: needsTaxonomy ? loadTaxonomy(LEDGER_DATA_DIR).category_skill : undefined,
    createSpec: isCreate ? { description: TEST_DOMAIN_SPEC.description, categories: TEST_DOMAIN_SPEC.categories } : undefined,
    existingDescriptions: isCreate ? loadDescriptions() : undefined,
    promptSet: isCreate ? loadPromptSet() : undefined,
  });
  printResult(res, verb, label, apply);
}

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