require 'delegate'
require 'rainbow'
require 'forwardable'

module PGit
  class Command
    class Show
      extend Forwardable
      def_delegators :@app, :commands, :args, :global_opts, :opts

      def initialize(app)
        @app = app
      end

      def execute!
        error_message = "No commands are listed for this project. Run `pgit cmd add --help` for more info."
        raise PGit::Error::User, error_message if commands.empty?

        if search.empty?
          show_all_of_current_project
        else
          show_one
        end
      end

      def search
        args.first || []
      end

      private

      def show_all_of_current_project
        puts "Listing custom commands of the current project..."
        puts
        commands.each { |c| puts c.to_s }
        puts
      end

      def command
        commands.find { |c| c.name == search }
      end

      def show_one
        raise PGit::Error::User, "Command '#{search}' not found for this project" unless command

        puts "Listing custom command '#{Rainbow(command.name).bright}' of the current project..."
        puts
        puts command.to_s
        puts
      end
    end
  end
end