# frozen_string_literal: true

module Command
  class CleanupOldImages < Base
    NAME = "cleanup-old-images"
    OPTIONS = [
      app_option(required: true),
      skip_confirm_option
    ].freeze
    DESCRIPTION = "Deletes all images for an app that are older than the specified amount of days"
    LONG_DESCRIPTION = <<~HEREDOC
      - Deletes all images for an app that are older than the specified amount of days
      - Specify the amount of days through `old_image_retention_days` in the `.controlplane/controlplane.yml` file
      - Will ask for explicit user confirmation
      - Does not affect the latest image, regardless of how old it is
    HEREDOC

    def call
      return progress.puts "No old images found" if old_images.empty?

      progress.puts "Old images:"
      old_images.each do |image|
        progress.puts "  #{image[:name]} (#{thor_shell.set_color((image[:date]).to_s, :red)})"
      end

      return unless confirm_delete

      progress.puts
      delete_images
    end

    private

    def old_images # rubocop:disable Metrics/MethodLength
      @old_images ||=
        begin
          result_images = []

          now = DateTime.now
          old_image_retention_days = config[:old_image_retention_days]

          images = cp.image_query["items"].filter { |item| item["name"].start_with?("#{config.app}:")	}

          # Remove latest image, because we don't want to delete the image that is currently deployed
          latest_image_name = latest_image_from(images)
          images = images.filter { |item| item["name"] != latest_image_name }

          images.each do |image|
            created_date = DateTime.parse(image["created"])
            diff_in_days = (now - created_date).to_i
            next unless diff_in_days >= old_image_retention_days

            result_images.push({
                                 name: image["name"],
                                 date: created_date
                               })
          end

          result_images
        end
    end

    def confirm_delete
      return true if config.options[:yes]

      thor_shell.yes?("\nAre you sure you want to delete these #{old_images.length} images (y/n)?")
    end

    def delete_images
      old_images.each do |image|
        cp.image_delete(image[:name])
        progress.puts "#{image[:name]} deleted"
      end
    end
  end
end