# Copyright 2024 Clivern. All rights reserved.
# Use of this source code is governed by the MIT
# license that can be found in the LICENSE file.

defmodule Saturn.Validator do
  @moduledoc """
  Saturn Validator
  """

  @uuid_expr ~r/^[\da-f]{8}-[\da-f]{4}-[\da-f]{4}-[\da-f]{4}-[\da-f]{12}$/i

  @doc """
  Validate if value is nullable
  """
  def is_null?(""), do: true

  def is_null?(nil), do: true

  def is_null?(value) do
    String.trim(to_string(value)) == ""
  rescue
    _ ->
      false
  end

  @doc """
  Validate if value is empty
  """
  def is_empty?(""), do: true

  def is_empty?(value) do
    String.trim(to_string(value)) == ""
  rescue
    _ ->
      false
  end

  @doc """
  Validate if value equal an argument
  """
  def equal(value, arg) when is_struct(arg, Date) do
    Date.compare(value, arg) == :eq
  rescue
    _ ->
      false
  end

  def equal(value, arg) when is_struct(arg, DateTime) do
    DateTime.compare(value, arg) == :eq
  rescue
    _ ->
      false
  end

  def equal(value, arg) when is_struct(arg, NaiveDateTime) do
    NaiveDateTime.compare(value, arg) == :eq
  rescue
    _ ->
      false
  end

  def equal(value, arg) do
    value == arg
  end

  def ends_with?(value, str) do
    String.ends_with?(to_string(value), to_string(str))
  rescue
    _ ->
      false
  end

  def is_uuid?(value) do
    Regex.match?(@uuid_expr, value)
  rescue
    _ ->
      false
  end

  def between(value, min, max) do
    value >= min and value <= max
  end

  def gt(value, arg) do
    value > arg
  end

  def lt(value, arg) do
    value < arg
  end

  def gte(value, arg) do
    value >= arg
  end

  def lte(value, arg) do
    value <= arg
  end
end