// Circle Suite — Voice Profile (level 4).
//
// The Copy Engine writes in the TEAM voice. That is the right default: it is
// compliant, it is consistent, and a brand-new member has no voice of their own
// to write in yet. But a member who has been at this a while sounds like
// themselves, and copy that sounds like the team instead of like them is the
// first thing their own audience notices.
//
// So this is not a second engine. It is a small profile that rides along with
// every Copy Engine and Email Engine generation and biases the output toward
// how this particular person actually talks.
//
// Deliberately kept short. Five specific answers beat a long questionnaire: the
// profile becomes prompt text, and prompt text that rambles just dilutes the
// instructions that matter (the compliance block especially).
'use strict';
const fs = require('fs');
const path = require('path');

let DATA_DIR = null;
function init(opts) {
  DATA_DIR = opts.dataDir;
  try { fs.mkdirSync(dir(), { recursive: true }); } catch (e) {}
}
function dir() { return path.join(DATA_DIR, 'voice'); }
function file(id) { return path.join(dir(), String(Number(id)) + '.json'); }

// field -> {label, hint, max}. Order is the order they appear in the form.
const FIELDS = [
  { key: 'background', label: 'What did you do before this?',
    hint: 'A trade, a job, a business, retired, still working — one line is plenty.', max: 220 },
  { key: 'audience', label: 'Who are you usually talking to?',
    hint: 'Friends and family? Other marketers? People in your church, your gym, your old industry?', max: 220 },
  { key: 'tone', label: 'How would a friend describe the way you talk?',
    hint: 'Blunt. Funny. Careful. Encouraging. Skeptical. Pick a few real words.', max: 160 },
  { key: 'never', label: 'What would you never say?',
    hint: 'Words or promises that would make you cringe coming out of your own mouth.', max: 220 },
  { key: 'sample', label: 'Paste something you actually wrote',
    hint: 'A post, a text, an email — anything a few sentences long, in your own words. This teaches it more than the rest combined.', max: 900 }
];

function blank() {
  const o = {};
  FIELDS.forEach(function (f) { o[f.key] = ''; });
  return o;
}

function load(id) {
  try { return JSON.parse(fs.readFileSync(file(id), 'utf8')); } catch (e) { return null; }
}

function save(id, body) {
  const rec = blank();
  FIELDS.forEach(function (f) {
    rec[f.key] = String((body && body[f.key]) || '').replace(/\s+/g, ' ').trim().slice(0, f.max);
  });
  rec.id = Number(id);
  rec.updatedAt = new Date().toISOString();
  rec.complete = complete(rec);
  try { fs.writeFileSync(file(id), JSON.stringify(rec)); } catch (e) {}
  return rec;
}

function clear(id) {
  try { fs.unlinkSync(file(id)); } catch (e) {}
  return true;
}

// "Complete enough to be worth using" — not every field, because the writing
// sample alone carries most of the signal.
function complete(rec) {
  if (!rec) return false;
  const filled = FIELDS.filter(function (f) { return String(rec[f.key] || '').trim().length > 2; }).length;
  return filled >= 2 && String(rec.sample || rec.tone || '').trim().length > 10;
}

// Render the profile as prompt text. Returns '' when there is nothing useful,
// so callers can concatenate unconditionally.
function promptBlock(id) {
  const rec = load(id);
  if (!complete(rec)) return '';
  const bits = [];
  if (rec.background) bits.push('Their background: ' + rec.background);
  if (rec.audience) bits.push('Who they are writing to: ' + rec.audience);
  if (rec.tone) bits.push('How they come across: ' + rec.tone);
  if (rec.never) bits.push('Things they would never say — avoid these completely: ' + rec.never);
  if (rec.sample) bits.push('A sample of their own writing, for rhythm and word choice (do NOT copy its content, only its voice):\n"""\n' + rec.sample + '\n"""');
  if (!bits.length) return '';
  return 'WRITE AS THIS PERSON. Match their rhythm, vocabulary and level of formality. ' +
    'This overrides the generic team voice above, EXCEPT for the compliance rules, which are absolute and can never be relaxed to sound more like them.\n' +
    bits.join('\n');
}

module.exports = { init, FIELDS, blank, load, save, clear, complete, promptBlock };