// Shared helpers used by every translations editor (CMS messages, Nitro JSON5
// configs, JSON badge files). Editors operate on a flat `key -> string` map
// for ease of search/filter/render; the on-disk format is the nested object
// produced by `unflattenObject`.

export function flattenObject(obj: Record<string, unknown>, prefix = ''): Record<string, string> {
  const result: Record<string, string> = {}
  for (const [key, value] of Object.entries(obj)) {
    const fullKey = prefix ? `${prefix}.${key}` : key
    if (typeof value === 'object' && value !== null && !Array.isArray(value)) {
      Object.assign(result, flattenObject(value as Record<string, unknown>, fullKey))
    } else {
      result[fullKey] = String(value ?? '')
    }
  }
  return result
}

export function unflattenObject(flat: Record<string, string>): Record<string, unknown> {
  const result: Record<string, unknown> = {}
  for (const [key, value] of Object.entries(flat)) {
    const parts = key.split('.')
    let current: Record<string, unknown> = result
    for (let i = 0; i < parts.length - 1; i++) {
      if (!current[parts[i]] || typeof current[parts[i]] !== 'object') {
        current[parts[i]] = {}
      }
      current = current[parts[i]] as Record<string, unknown>
    }
    current[parts[parts.length - 1]] = value
  }
  return result
}