# frozen_string_literal: true

module ReactOnRails
  def self.configure
    yield(configuration)
    setup_config_values
  end

  DEFAULT_GENERATED_ASSETS_DIR = File.join(%w[public webpack], Rails.env).freeze

  def self.setup_config_values
    ensure_webpack_generated_files_exists
    configure_generated_assets_dirs_deprecation
    configure_skip_display_none_deprecation
    ensure_generated_assets_dir_present
    ensure_server_bundle_js_file_has_no_path
    check_i18n_directory_exists
    check_i18n_yml_directory_exists
  end

  def self.check_i18n_directory_exists
    return unless @configuration.i18n_dir.present?
    return if Dir.exist?(@configuration.i18n_dir)

    raise "Error configuring /config/react_on_rails.rb: invalid value for `config.i18n_dir`. "\
        "Directory does not exist: #{@configuration.i18n_dir}. Set to value to nil or comment it "\
        "out if not using the React on Rails i18n feature."
  end

  def self.check_i18n_yml_directory_exists
    return unless @configuration.i18n_yml_dir.present?
    return if Dir.exist?(@configuration.i18n_yml_dir)

    raise "Error configuring /config/react_on_rails.rb: invalid value for `config.i18n_yml_dir`. "\
        "Directory does not exist: #{@configuration.i18n_yml_dir}. Set to value to nil or comment it "\
        "out if not using this i18n with React on Rails, or if you want to use all translation files."
  end

  def self.ensure_generated_assets_dir_present
    return unless @configuration.generated_assets_dir.blank?

    @configuration.generated_assets_dir = DEFAULT_GENERATED_ASSETS_DIR
    puts "ReactOnRails: Set generated_assets_dir to default: #{DEFAULT_GENERATED_ASSETS_DIR}"
  end

  def self.configure_generated_assets_dirs_deprecation
    return unless @configuration.generated_assets_dirs.present?

    puts "[DEPRECATION] ReactOnRails: Use config.generated_assets_dir rather than "\
        "generated_assets_dirs"
    if @configuration.generated_assets_dir.blank?
      @configuration.generated_assets_dir = @configuration.generated_assets_dirs
    else
      puts "[DEPRECATION] ReactOnRails. You have both generated_assets_dirs and "\
          "generated_assets_dir defined. Define ONLY generated_assets_dir"
    end
  end

  def self.ensure_webpack_generated_files_exists
    return unless @configuration.webpack_generated_files.empty?

    files = ["webpack-bundle.js"]
    if @configuration.server_bundle_js_file.present?
      files << @configuration.server_bundle_js_file
    end
    @configuration.webpack_generated_files = files
  end

  def self.ensure_server_bundle_js_file_has_no_path
    return unless @configuration.server_bundle_js_file.include?(File::SEPARATOR)

    puts "[DEPRECATION] ReactOnRails: remove path from server_bundle_js_file in configuration. "\
        "All generated files must go in #{@configuration.generated_assets_dir}"
    @configuration.server_bundle_js_file = File.basename(@configuration.server_bundle_js_file)
  end

  def self.configure_skip_display_none_deprecation
    return if @configuration.skip_display_none.nil?
    puts "[DEPRECATION] ReactOnRails: remove skip_display_none from configuration."
  end

  def self.configuration
    @configuration ||= Configuration.new(
      generated_assets_dirs: nil,

      # generated_assets_dirs is deprecated
      generated_assets_dir: "",
      server_bundle_js_file: "",
      prerender: false,
      replay_console: true,
      logging_on_server: true,
      raise_on_prerender_error: false,
      trace: Rails.env.development?,
      development_mode: Rails.env.development?,
      server_renderer_pool_size: 1,
      server_renderer_timeout: 20,
      skip_display_none: nil,

      # skip_display_none is deprecated
      webpack_generated_files: [],
      rendering_extension: nil,
      server_render_method: "",
      symlink_non_digested_assets_regex: nil,
      npm_build_test_command: "",
      i18n_dir: "",
      i18n_yml_dir: "",
      npm_build_production_command: ""
    )
  end

  class Configuration
    attr_accessor :server_bundle_js_file, :prerender, :replay_console,
                  :trace, :development_mode,
                  :logging_on_server, :server_renderer_pool_size,
                  :server_renderer_timeout, :skip_display_none, :raise_on_prerender_error,
                  :generated_assets_dirs, :generated_assets_dir,
                  :webpack_generated_files, :rendering_extension, :npm_build_test_command,
                  :npm_build_production_command,
                  :i18n_dir, :i18n_yml_dir,
                  :server_render_method, :symlink_non_digested_assets_regex

    def initialize(server_bundle_js_file: nil, prerender: nil, replay_console: nil,
                   trace: nil, development_mode: nil,
                   logging_on_server: nil, server_renderer_pool_size: nil,
                   server_renderer_timeout: nil, raise_on_prerender_error: nil,
                   skip_display_none: nil, generated_assets_dirs: nil,
                   generated_assets_dir: nil, webpack_generated_files: nil,
                   rendering_extension: nil, npm_build_test_command: nil,
                   npm_build_production_command: nil,
                   i18n_dir: nil, i18n_yml_dir: nil,
                   server_render_method: nil, symlink_non_digested_assets_regex: nil)
      self.server_bundle_js_file = server_bundle_js_file
      self.generated_assets_dirs = generated_assets_dirs
      self.generated_assets_dir = generated_assets_dir
      self.npm_build_test_command = npm_build_test_command
      self.npm_build_production_command = npm_build_production_command
      self.i18n_dir = i18n_dir
      self.i18n_yml_dir = i18n_yml_dir

      self.prerender = prerender
      self.replay_console = replay_console
      self.logging_on_server = logging_on_server
      self.development_mode = if development_mode.nil?
                                Rails.env.development?
                              else
                                development_mode
                              end
      self.trace = trace.nil? ? Rails.env.development? : trace
      self.raise_on_prerender_error = raise_on_prerender_error
      self.skip_display_none = skip_display_none

      # Server rendering:
      self.server_renderer_pool_size = self.development_mode ? 1 : server_renderer_pool_size
      self.server_renderer_timeout = server_renderer_timeout # seconds

      self.webpack_generated_files = webpack_generated_files
      self.rendering_extension = rendering_extension

      self.server_render_method = server_render_method
      self.symlink_non_digested_assets_regex = symlink_non_digested_assets_regex
    end
  end
end