defmodule ExDoubleEntry do
  @db_table_prefix Application.fetch_env!(:ex_double_entry, :db_table_prefix)
  @repo Application.fetch_env!(:ex_double_entry, :repo)

  def db_table_prefix, do: @db_table_prefix

  def repo, do: @repo

  @doc """
  ## Examples

  iex> ExDoubleEntry.make_account!(:savings).__struct__
  ExDoubleEntry.Account
  """
  defdelegate make_account!(identifier, opts \\ []), to: ExDoubleEntry.Account, as: :make!

  @doc """
  ## Examples

  iex> ExDoubleEntry.lookup_account!(:savings, currency: :USD)
  nil
  """
  defdelegate lookup_account!(identifier, opts \\ []), to: ExDoubleEntry.Account, as: :lookup!

  @doc """
  ## Examples

  iex> [ExDoubleEntry.make_account!(:savings)] |> ExDoubleEntry.lock_accounts(fn -> true end)
  {:ok, true}
  """
  defdelegate lock_accounts(accounts, fun), to: ExDoubleEntry.AccountBalance, as: :lock_multi!

  @doc """
  ## Examples

  iex> %ExDoubleEntry.Transfer{
  iex>   money: Money.new(42, :USD),
  iex>   from: %ExDoubleEntry.Account{identifier: :checking, currency: :USD, balance: Money.new(42, :USD), positive_only?: false},
  iex>   to: %ExDoubleEntry.Account{identifier: :savings, currency: :USD, balance: Money.new(0, :USD)},
  iex>   code: :deposit
  iex> }
  iex> |> ExDoubleEntry.transfer!()
  iex> |> Tuple.to_list()
  iex> |> List.first()
  :ok
  """
  defdelegate transfer!(transfer), to: ExDoubleEntry.Transfer, as: :perform!

  def transfer(transfer) do
    ExDoubleEntry.Transfer.perform!(transfer, ensure_accounts: false)
  end
end