# frozen_string_literal: true

require 'forwardable'

require_relative './config/builder'
require_relative './config/constants'
require_relative './config/data'
require_relative './config/option_validator'

# Generate blog post/article fixture data, with embedded marker tag pairs.
module ArticleFixtureGen
  # Maintain configuration information for app.
  class Config
    # Error raised when validating one or more attributes fails.
    class ValidationError < RuntimeError
    end # class ArticleFixtureGen::Config::ValidationError

    extend Forwardable

    def initialize(options_hash)
      data = Builder.call(options_hash)
      validate(data) # will raise if not valid
      @values = Data.new data
      self
    end

    def self.defaults
      new Constants::DEFAULTS
    end

    def_delegators :@values, :article_count, :config, :config_given,
                   :generate_config, :generate_config_given,
                   :para_count_max, :para_count_min, :pmtp_count, :pmtp_text,
                   :sent_count_max, :sent_count_min, :smtp_count, :smtp_text,
                   :to_hash

    private

    def validate(data)
      errors = OptionValidator.call options: data
      return self if errors.empty?
      raise ValidationError, errors.first
    end
  end # class ArticleFixtureGen::Config
end