defmodule <%= schema_module %> do
  use Ecto.Schema
  import Ecto.Changeset

  schema "<%= table %>" do
    field :email, :string
    field :password, :string, virtual: true, redact: true
    field :hashed_password, :string, redact: true
    field :confirmed_at, :naive_datetime

    timestamps(type: :utc_datetime)
  end

  def registration_changeset(user, attrs) do
    user
    |> cast(attrs, [:email, :password])
    |> validate_email()
    |> validate_password()
  end

  def password_changeset(user, attrs) do
    user
    |> cast(attrs, [:password])
    |> validate_password()
  end

  defp validate_email(changeset) do
    changeset
    |> validate_required([:email])
    |> validate_format(:email, ~r/^[^\s]+@[^\s]+$/)
    |> unique_constraint(:email)
  end

  defp validate_password(changeset) do
    changeset
    |> validate_required([:password])
    |> validate_length(:password, min: 12, max: 72)
    |> maybe_hash_password()
  end

  defp maybe_hash_password(changeset) do
    password = get_change(changeset, :password)

    if password do
      changeset
      |> put_change(:hashed_password, Dialup.Auth.Hash.hash_password(password))
      |> delete_change(:password)
    else
      changeset
    end
  end
end