defmodule MvWeb.Helpers.DateFormatter do
  @moduledoc """
  Centralized date formatting helper for the application.
  Formats dates in European format (dd.mm.yyyy).
  """

  use Gettext, backend: MvWeb.Gettext

  @doc """
  Formats a Date struct to European format (dd.mm.yyyy).

  ## Examples

      iex> MvWeb.Helpers.DateFormatter.format_date(~D[2024-03-15])
      "15.03.2024"

      iex> MvWeb.Helpers.DateFormatter.format_date(nil)
      ""
  """
  def format_date(%Date{} = date) do
    Calendar.strftime(date, "%d.%m.%Y")
  end

  def format_date(nil), do: ""

  def format_date(_), do: "Invalid date"

  @doc """
  Formats a DateTime struct to European format (dd.mm.yyyy HH:MM).

  ## Examples

      iex> MvWeb.Helpers.DateFormatter.format_datetime(~U[2024-03-15 10:30:00Z])
      "15.03.2024 10:30"

      iex> MvWeb.Helpers.DateFormatter.format_datetime(nil)
      ""
  """
  def format_datetime(%DateTime{} = dt) do
    Calendar.strftime(dt, "%d.%m.%Y %H:%M")
  end

  def format_datetime(nil), do: ""

  def format_datetime(_), do: "Invalid datetime"
end