#!/usr/bin/env node
/**
 * Skill Cleanup: Remove 22 low-value skills
 * - 14 delete (irrelevant/niche/overlapping)
 * - 8 merge-remove (redundant groups)
 * Moves skill dirs to skills/_archived/, removes from skills-index.json
 */
'use strict';
const fs = require('fs');
const path = require('path');

const CLAUDE_ROOT = path.resolve(__dirname, '..', '..');
const INDEX = path.join(CLAUDE_ROOT, 'skills-index.json');
const SKILLS_DIR = path.join(CLAUDE_ROOT, 'skills');
const ARCHIVE_DIR = path.join(SKILLS_DIR, '_archived');

const TO_REMOVE = [
  // Cat 1: language/framework mismatch (6)
  'angular-architect', 'flutter-expert', 'golang-pro',
  'rust-engineer', 'swift-expert', 'vue-expert',
  // Cat 1: extremely niche (4)
  'ai-philosophy-expert', 'edge-computing-expert', 'graphql-architect', 'evolution-tracker',
  // Cat 1: overlapping with T1 (4)
  'ultimate-code-expert', 'frontend-design', 'design-consultation', 'design-review',
  // Cat 2: plan variants → planning-with-files covers (3)
  'plan-ceo-review', 'plan-design-review', 'plan-eng-review',
  // Cat 2: design duplicates → frontend-expert T1 covers (3)
  'designer-expert', 'ui-ux-pro-max', 'ux-researcher',
  // Cat 2: setup tools → devops-expert covers (2)
  'setup-browser-cookies', 'setup-deploy',
];

if (!fs.existsSync(INDEX)) { process.stderr.write('[FAIL] skills-index.json not found\n'); process.exit(1); }
const src = fs.readFileSync(INDEX, 'utf8');
let index;
try { index = JSON.parse(src); } catch { process.stderr.write('[FAIL] parse\n'); process.exit(1); }

fs.writeFileSync(INDEX + '.bak-cleanup.' + Date.now(), src);

const removeSet = new Set(TO_REMOVE);
const before = index.skills.length;
index.skills = index.skills.filter(s => !removeSet.has(s.name));
const removed = before - index.skills.length;

// Write updated index
const tmp = INDEX + '.tmp.' + process.pid;
fs.writeFileSync(tmp, JSON.stringify(index, null, 2), 'utf8');
fs.renameSync(tmp, INDEX);
process.stderr.write('[INDEX] Removed ' + removed + '/' + TO_REMOVE.length + ' from skills-index.json (' + before + ' -> ' + index.skills.length + ')\n');

// Move skill directories to _archived
if (!fs.existsSync(ARCHIVE_DIR)) fs.mkdirSync(ARCHIVE_DIR, { recursive: true });
let moved = 0;
for (const name of TO_REMOVE) {
  const src = path.join(SKILLS_DIR, name);
  const dst = path.join(ARCHIVE_DIR, name);
  if (fs.existsSync(src) && !fs.existsSync(dst)) {
    try { fs.renameSync(src, dst); moved++; } catch (e) {
      process.stderr.write('[WARN] Failed to move ' + name + ': ' + e.message + '\n');
    }
  }
}
process.stderr.write('[FILES] Moved ' + moved + ' skill dirs to _archived/\n');

// Summary
const tiers = {};
for (const s of index.skills) tiers[s.tier_class] = (tiers[s.tier_class] || 0) + 1;
process.stderr.write('[DONE] Final: ' + index.skills.length + ' skills (T1=' + (tiers.T1||0) + ' T2=' + (tiers.T2||0) + ' T3=' + (tiers.T3||0) + ')\n');