defmodule Mv.Constants do
  @moduledoc """
  Module for defining constants and atoms.
  """

  @member_fields [
    :first_name,
    :last_name,
    :email,
    :join_date,
    :exit_date,
    :notes,
    :city,
    :street,
    :house_number,
    :postal_code,
    :membership_fee_start_date
  ]

  @custom_field_prefix "custom_field_"

  @email_validator_checks [:html_input, :pow]

  def member_fields, do: @member_fields

  @doc """
  Returns the prefix used for custom field keys in field visibility maps.

  ## Examples

      iex> Mv.Constants.custom_field_prefix()
      "custom_field_"
  """
  def custom_field_prefix, do: @custom_field_prefix

  @doc """
  Returns the email validator checks used for EctoCommons.EmailValidator.

  We use both `:html_input` and `:pow` checks:
  - `:html_input` - Pragmatic validation matching browser `<input type="email">` behavior
  - `:pow` - Stricter validation following email spec, supports internationalization (Unicode)

  Using both ensures:
  - Compatibility with common email providers (html_input)
  - Compliance with email standards (pow)
  - Support for international email addresses (pow)

  ## Examples

      iex> Mv.Constants.email_validator_checks()
      [:html_input, :pow]
  """
  def email_validator_checks, do: @email_validator_checks
end