// Shared by GNOME preferences and the daemon; no platform-specific imports.
export function normalizeSettings(source, fields, { strict = false } = {}) {
  const config = source && typeof source === 'object' && !Array.isArray(source) ? source : {};
  const result = {};
  for (const field of fields) {
    let value = config[field.key];
    if (value == null) {
      for (const alias of field.aliases || []) if (config[alias] != null) { value = config[alias]; break; }
    }
    if (value == null) value = field.default;
    if (field.type === 'boolean' && typeof value === 'string') {
      const flag = value.trim().toLowerCase();
      if (['false', '0', 'off', 'no'].includes(flag)) value = false;
      else if (['true', '1', 'on', 'yes'].includes(flag)) value = true;
    }
    if (field.type === 'number' && typeof value === 'string' && value.trim()) value = Number(value);
    if (field.type === 'list' && typeof value === 'string') value = value.split(',').map(v => v.trim()).filter(Boolean);
    if (field.key === 'asrLanguage' && typeof value === 'string') value = value.toLowerCase().split(/[-_]/)[0];
    if (['string', 'file'].includes(field.type) && typeof value === 'string') value = value.trim();
    const valid = field.type === 'boolean' ? typeof value === 'boolean'
      : field.type === 'number' ? Number.isFinite(value) && value >= field.min && value <= field.max && (field.step < 1 || Number.isInteger(value))
      : field.type === 'choice' ? field.options.some(option => option.value === value)
      : field.type === 'list' ? Array.isArray(value) && value.every(item => typeof item === 'string')
      : typeof value === 'string' && value.length <= 4096;
    if (!valid && strict) throw new Error(`Invalid value for ${field.title}`);
    result[field.key] = valid ? value : field.default;
  }
  if (result.vadMinSpeechMs > result.vadMaxSpeechSeconds * 1000) throw new Error('Minimum speech must be shorter than the maximum recording');
  return result;
}

export function mergeSettings(source, changes, fields) {
  const merged = { ...source, ...changes };
  // Remove obsolete aliases only for settings actually changed by this window.
  for (const field of fields) if (Object.hasOwn(changes, field.key)) {
    for (const alias of field.aliases || []) delete merged[alias];
  }
  return merged;
}

export function settingVisible(field, values) {
  return !field.when || Object.entries(field.when).every(([key, choices]) => choices.includes(values[key]));
}