/**
 * Recursively copies missing keys from en.json into es.json (does not overwrite
 * existing Spanish strings). Fixes ngx-translate showing raw keys like WORKSPACE.SHELL.*.
 *
 * After running this, optionally run `node tools/i18n/apply-shell-es-ui.mjs` to
 * replace merged English workspace shell strings with Spanish for KiraTV / es UI.
 */
import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const root = path.resolve(__dirname, '..', '..');
const enPath = path.join(root, 'apps/web/src/assets/i18n/en.json');
const esPath = path.join(root, 'apps/web/src/assets/i18n/es.json');

function fillMissing(enVal, esVal) {
    if (enVal === null || typeof enVal !== 'object' || Array.isArray(enVal)) {
        return esVal !== undefined ? esVal : enVal;
    }
    const out =
        esVal !== null && typeof esVal === 'object' && !Array.isArray(esVal)
            ? { ...esVal }
            : {};
    for (const [k, v] of Object.entries(enVal)) {
        if (out[k] === undefined) {
            out[k] = Array.isArray(v) ? [...v] : v;
        } else if (
            v !== null &&
            typeof v === 'object' &&
            !Array.isArray(v) &&
            typeof out[k] === 'object' &&
            !Array.isArray(out[k])
        ) {
            out[k] = fillMissing(v, out[k]);
        }
    }
    return out;
}

const en = JSON.parse(fs.readFileSync(enPath, 'utf8'));
const es = JSON.parse(fs.readFileSync(esPath, 'utf8'));
const merged = fillMissing(en, es);
fs.writeFileSync(esPath, JSON.stringify(merged, null, 4) + '\n');
console.log('Merged missing i18n keys from en.json into es.json');