#!/usr/bin/env node
/**
 * Setzt bewusste Cognates/Produktnamen explizit in allen Locales (Wert = en-US oder de).
 */
const fs = require('fs');
const path = require('path');

const ROOT = path.resolve(__dirname, '..');
const LOCALES_DIR = path.join(ROOT, 'frontend', 'src', 'i18n', 'locales');

const LOCALES = [
  'fr', 'es', 'it', 'pl', 'ja', 'zh', 'th', 'tl', 'fil',
  'en-US', 'en-GB', 'en-AU',
];

// Keys, die in Nicht-DE-Locales explizit gesetzt werden (Wert aus en-US-Merge)
const COGNATE_KEYS = [
  'common.filter', 'common.details', 'common.name', 'common.status',
  'common.optional', 'common.in', 'common.ok',
  'navigation.clickTtBrowser',
  'members.rowTooltipSeparator', 'members.ttrQttr', 'members.status',
  'members.clickTtRequestShort',
  'diary.standardDurationShort', 'diary.min',
  'trainingStats.name', 'trainingStats.ttr', 'trainingStats.qttr',
  'tournaments.knockoutLabel', 'tournaments.genderMixed', 'tournaments.optional',
  'tournaments.index', 'tournaments.diff',
  'billing.iban',
  'schedule.code', 'schedule.team', 'schedule.teams', 'schedule.vs',
  'teamManagement.team', 'teamManagement.teams',
  'courtDrawingTool.strokeTypeTopspin', 'courtDrawingTool.strokeTypeFlip',
  'courtDrawingTool.strokeTypeBlock',
  'matchReportApi.vs', 'courtDrawing.ok',
  'pdfGenerator.diff', 'pdfGenerator.lineupQttr',
  'pendingApprovals.email', 'permissions.email',
  'logs.details', 'logs.logDetailsLabels.ip',
  'dialogs.info.ok', 'dialogs.confirm.ok',
  'memberTransferDialog.server', 'memberTransferDialog.endpoint', 'memberTransferDialog.format',
  'myTischtennis.title', 'myTischtennisAccount.title', 'myTischtennisAccount.teams',
  'memberNotes.tags', 'nuscoreAnalyzer.title',
  'predefinedActivities.min',
];

const EXTRA = {
  fr: { 'members.address': 'Adresse' },
  es: { 'members.address': 'Dirección' },
  it: { 'members.address': 'Indirizzo' },
  pl: { 'members.address': 'Adres' },
  ja: { 'members.address': '住所' },
  zh: { 'members.address': '地址' },
  th: { 'members.address': 'ที่อยู่' },
  tl: { 'members.address': 'Address', 'languages.th': 'Thai (ไทย)' },
  fil: { 'members.address': 'Address', 'languages.th': 'Thai (ไทย)' },
};

function flatten(obj, prefix = '', out = {}) {
  for (const [key, value] of Object.entries(obj || {})) {
    const nextKey = prefix ? `${prefix}.${key}` : key;
    if (value && typeof value === 'object' && !Array.isArray(value)) {
      flatten(value, nextKey, out);
    } else if (typeof value === 'string') {
      out[nextKey] = value;
    }
  }
  return out;
}

function deepMerge(base, override) {
  if (!base || typeof base !== 'object' || Array.isArray(base)) return override ?? base;
  const result = { ...base };
  for (const [key, value] of Object.entries(override || {})) {
    if (
      value && typeof value === 'object' && !Array.isArray(value) &&
      result[key] && typeof result[key] === 'object' && !Array.isArray(result[key])
    ) {
      result[key] = deepMerge(result[key], value);
    } else {
      result[key] = value;
    }
  }
  return result;
}

function setByPath(obj, dotPath, value) {
  const parts = dotPath.split('.');
  let cur = obj;
  for (let i = 0; i < parts.length - 1; i++) {
    if (!cur[parts[i]] || typeof cur[parts[i]] !== 'object') cur[parts[i]] = {};
    cur = cur[parts[i]];
  }
  cur[parts[parts.length - 1]] = value;
}

function buildOverrides(deFlat, targetFlat) {
  const out = {};
  for (const [key, value] of Object.entries(targetFlat)) {
    if (value !== deFlat[key]) setByPath(out, key, value);
  }
  return out;
}

const de = JSON.parse(fs.readFileSync(path.join(LOCALES_DIR, 'de.json'), 'utf8'));
const enUs = JSON.parse(fs.readFileSync(path.join(LOCALES_DIR, 'en-US.json'), 'utf8'));
const deFlat = flatten(de);
const enMerged = flatten(deepMerge(JSON.parse(JSON.stringify(de)), enUs));

for (const locale of LOCALES) {
  const localePath = path.join(LOCALES_DIR, `${locale}.json`);
  if (!fs.existsSync(localePath)) continue;
  const localeJson = JSON.parse(fs.readFileSync(localePath, 'utf8'));
  const merged = flatten(deepMerge(JSON.parse(JSON.stringify(de)), localeJson));

  for (const key of COGNATE_KEYS) {
    const val = enMerged[key] ?? deFlat[key];
    if (val !== undefined) merged[key] = val;
  }
  for (const [key, val] of Object.entries(EXTRA[locale] || {})) {
    merged[key] = val;
  }

  const overrides = buildOverrides(deFlat, merged);
  fs.writeFileSync(localePath, `${JSON.stringify(overrides, null, 2)}\n`, 'utf8');
  const stillDe = Object.keys(deFlat).filter((k) => merged[k] === deFlat[k]).length;
  console.log(`${locale}: overrides=${Object.keys(flatten(overrides)).length}, stillDe=${stillDe}`);
}