# frozen_string_literal: true

module DockerfileRails
  module Scanner
    def scan_rails_app
      ### ruby gems ###

      @gemfile = []
      @git = false

      if File.exist? "Gemfile.lock"
        parser = Bundler::LockfileParser.new(Bundler.read_file("Gemfile.lock"))
        @gemfile += parser.specs.map { |spec, version| spec.name }
        @git ||= ENV["RAILS_ENV"] != "test" && parser.specs.any? do |spec|
          spec.source.instance_of? Bundler::Source::Git
        end
      end

      if File.exist? "Gemfile"
        begin
          gemfile_definition = Bundler::Definition.build("Gemfile", nil, [])
          @gemfile += gemfile_definition.dependencies.map(&:name)

          unless ENV["RAILS_ENV"] == "test"
            @git = !gemfile_definition.spec_git_paths.empty?
          end
        rescue => error
          STDERR.puts error.message
        end
      end

      @anycable = @gemfile.include? "anycable-rails"
      @vips = @gemfile.include? "ruby-vips"
      @bootstrap = @gemfile.include? "bootstrap"
      @puppeteer = @gemfile.include? "puppeteer"
      @bootsnap = @gemfile.include? "bootsnap"

      ### database ###

      database = YAML.load_file("config/database.yml", aliases: true).
        dig("production", "adapter") rescue nil

      if database == "sqlite3"
        @sqlite3 = true
      elsif database == "postgresql"
        @postgresql = true
      elsif (database == "mysql") || (database == "mysql2")
        @mysql = true
      elsif database == "sqlserver"
        @sqlserver = true
      end

      @sqlite3 = true if @gemfile.include? "sqlite3"
      @postgresql = true if @gemfile.include? "pg"
      @mysql = true if @gemfile.include? "mysql2"

      ### node modules ###

      @package_json = []

      if File.exist? "package.json"
        @package_json += JSON.load_file("package.json")["dependencies"].keys rescue []
      end

      @puppeteer ||= @package_json.include? "puppeteer"

      ### cable/redis ###

      @cable = ! Dir["app/channels/*.rb"].empty?

      if @cable
        @redis_cable = true
        if (YAML.load_file("config/cable.yml").dig("production", "adapter") rescue "").include? "any_cable"
          @anycable = true
        end
      end

      if (IO.read("config/environments/production.rb") =~ /redis/i rescue false)
        @redis_cache = true
      end

      @redis = @redis_cable || @redis_cache
    end
  end
end