defmodule EctoShorts.SchemaHelpers do
  @moduledoc """
  Module that has helpers that are globably useful on ecto schemas
  """

  @spec schema?(Ecto.Schema.t | any) :: boolean
  @doc """
  Determine if item passed in is a Ecto Schema

  ## Example

    iex> SchemaHelpers.schema?(create_schema())
    true
    iex> SchemaHelpers.schema?(%{some_map: 1})
    false
    iex> SchemaHelpers.schema?([create_schema()])
    false
  """
  def schema?(%{__meta__: %{schema: _}}), do: true
  def schema?(_), do: false

  @spec has_schemas?(list(Ecto.Schema.t | any)) :: boolean
  @doc """
  Determine if any items in list are a schema

  ## Example

    iex> SchemaHelpers.has_schemas?([%{some_map: 1}, create_schema()])
    true
    iex> SchemaHelpers.has_schemas?([%{some_map: 1}])
    false
  """
  def has_schemas?(items), do: Enum.any?(items, &schema?/1)

  @spec all_schemas?(list(Ecto.Schema.t | any)) :: boolean
  @doc """
  Determine if all items in list are a schema

  ## Example

    iex> SchemaHelpers.all_schemas([%{some_map: 1}, create_schema()])
    false
    iex> SchemaHelpers.all_schemas([create_schema(), create_schema()])
    true
  """
  def all_schemas?(items), do: Enum.all?(items, &schema?/1)

  @spec created?(Ecto.Schema.t | any) :: boolean
  @doc """
  Determine if item has been created or not

  ## Example

    iex> SchemaHelpers.created?(%{id: 2})
    true
    iex> SchemaHelpers.created?(%{"id" => 2})
    true
    iex> SchemaHelpers.created?(%{item: 3})
    false
  """
  def created?(%{id: _}), do: true
  def created?(%{"id" => _}), do: true
  def created?(_), do: false

  @spec all_created?(list(Ecto.Schema.t | any)) :: boolean
  @doc """
  Determine if all items in list has been created or not

  ## Example

    iex> SchemaHelpers.all_created?([%{id: 2}, %{"id" => 5}])
    true
    iex> SchemaHelpers.all_created?([%{"id" => 2}, %{item: 3}])
    false
  """
  def all_created?(items), do: Enum.all?(items, &created?/1)

  @spec any_created?(list(Ecto.Schema.t | any)) :: boolean
  @doc """
  Determine if any items in list has been created or not

  ## Example

    iex> SchemaHelpers.any_created?([%{id: 2}, %{"id" => 5}])
    true
    iex> SchemaHelpers.any_created?([%{"id" => 2}, %{item: 3}])
    true
    iex> SchemaHelpers.any_created?([%{test: 3}, %{item: 3}])
    false
  """
  def any_created?(items), do: Enum.any?(items, &created?/1)
end