# frozen_string_literal: true

require "dry/monads"

module Gemsmith
  module Gems
    # Picks a gem specification.
    class Picker
      include Dry::Monads[:result]

      def self.call(name, ...) = new(...).call name

      def initialize finder: Finder.new, kernel: Kernel
        warn "[DEPRECATION]: Picker is deprecated, use Spek gem instead."

        @finder = finder
        @kernel = kernel
      end

      def call name
        specifications = finder.call name

        case specifications.size
          when 1 then Success specifications.first
          when 2.. then Success choose(specifications)
          else Failure "Unknown gem or gem is not installed: #{name}."
        end
      end

      def choose specifications
        specifications.each.with_index 1 do |specification, index|
          kernel.puts "#{index}. #{specification.named_version}"
        end

        kernel.puts "\nPlease enter gem selection:"
        ARGV.clear
        specifications[kernel.gets.chomp.to_i - 1]
      end

      private

      attr_reader :finder, :kernel
    end
  end
end