defmodule Hobbes.BeginError do
  @moduledoc """
  Raised when a transaction fails to get a read version.
  """
  defexception [:message, :error]

  @impl true
  def exception([error: {:error, err}]) do
    %__MODULE__{message: "begin failed with error: #{inspect(err)}", error: err}
  end
end

defmodule Hobbes.CommitError do
  @moduledoc """
  Raised when a transaction fails to commit.
  """
  defexception [:message, :error, :read_version, :commit_version, :batch_index]

  @impl true
  def exception([error: {:error, err}, read_version: read_version, commit_version: commit_version, batch_index: batch_index]) do
    %__MODULE__{message: "commit failed with error: #{inspect(err)}", error: err, read_version: read_version, commit_version: commit_version, batch_index: batch_index}
  end
end

defmodule Hobbes.ReadError do
  @moduledoc """
  Raised when a read fails.
  """
  defexception [:message, :error]

  @impl true
  def exception([error: {:error, err}]) do
    %__MODULE__{message: "read failed with error: #{inspect(err)}", error: err}
  end
end

defmodule Hobbes.NoTransactionError do
  defexception [:message]

  @impl true
  def exception([]) do
    %__MODULE__{message: "reads and writes can only be performed within a transaction"}
  end
end