# frozen_string_literal: true

module CloudCannonJekyll
  class Configuration
    def self.processed?(site)
      site.instance_variable_get(:@_cloudcannon_jekyll_processed) == true
    end

    def self.process(site)
      site.instance_variable_set :@_cloudcannon_jekyll_processed, true
    end

    def self.overridden_config(user_config)
      config = Jekyll::Utils.deep_merge_hashes(Jekyll::Configuration::DEFAULTS, user_config)
      config = config.add_default_collections if config.respond_to? :add_default_collections
      config = config.fix_common_issues if config.respond_to? :fix_common_issues
      config = config.add_default_excludes if config.respond_to? :add_default_excludes

      key = Jekyll::VERSION.start_with?("2") ? "gems" : "plugins"

      config[key] = Array(config[key])
      config[key].push("cloudcannon-jekyll") unless config[key].include? "cloudcannon-jekyll"
      config
    end

    def self.set(site)
      return if processed? site

      if site.respond_to? :config=
        site.config = overridden_config(site.config)
      else # Jekyll pre 3.5
        site.instance_variable_set :@config, overridden_config(site.config)
      end

      process(site)
    end
  end
end