#!/usr/bin/env ruby
# frozen_string_literal: true

# Generate an Elastic migration file, spec and dictionary record with the current timestamp.

require 'yaml'
require_relative 'lib/migration_creator'

module GitLab
  module MigrationTools
    class ElasticMigrationCreator < BaseMigrationCreator
      protected

      def create_options_struct
        Struct.new(
          :name,
          :description,
          :group,
          :introduced_by_url,
          :milestone,
          :obsolete,
          :marked_obsolete_by_url,
          :marked_obsolete_in_milestone
        )
      end

      def collect_input
        options.name = read_name.camelize
        options.description = read_variable('description', 'Description of what the migration does')
        options.group = read_variable('group', 'The group introducing the migration, like: `global search`')
        options.introduced_by_url = read_url('URL of the MR introducing the migration')
        options.milestone = current_milestone
        options.obsolete = false
        options.marked_obsolete_by_url = nil
        options.marked_obsolete_in_milestone = nil
      end

      def write
        super
        write_file(dictionary_file_path, dictionary_contents)
      end

      def display_success_message
        super
        $stdout.puts "\e[32mcreated\e[0m #{dictionary_file_path}"
      end

      def display_additional_info
        $stdout.puts "\n=> Please consult the documentation for Advanced Search Migrations: #{documentation_reference}"
      end

      def file_path
        "ee/elastic/migrate/#{file_name}.rb"
      end

      def spec_file_path
        "ee/spec/elastic/migrate/#{file_name}_spec.rb"
      end

      def dictionary_file_path
        "ee/elastic/docs/#{file_name}.yml"
      end

      def file_contents
        <<~RUBY
          # frozen_string_literal: true

          class #{options.name} < Elastic::Migration
          end
        RUBY
      end

      def spec_contents
        <<~RUBY
          # frozen_string_literal: true

          require 'spec_helper'
          require File.expand_path('#{file_path}')

          # See https://docs.gitlab.com/ee/development/testing_guide/best_practices.html#elasticsearch-specs
          # for more information on how to write search migration specs for GitLab.
          RSpec.describe #{options.name}, feature_category: :#{options.group.parameterize.underscore} do
            let(:version) { #{timestamp} }
          end
        RUBY
      end

      def dictionary_contents
        dictionary_config_hash.to_yaml
      end

      def dictionary_config_hash
        {
          'name' => options.name,
          'version' => timestamp,
          'description' => options.description,
          'group' => "group::#{options.group}",
          'milestone' => options.milestone.to_s,
          'introduced_by_url' => options.introduced_by_url,
          'obsolete' => options.obsolete,
          'marked_obsolete_by_url' => options.marked_obsolete_by_url,
          'marked_obsolete_in_milestone' => options.marked_obsolete_in_milestone
        }
      end

      def documentation_reference
        'https://docs.gitlab.com/ee/development/search/advanced_search_migration_styleguide.html'
      end
    end
  end
end

GitLab::MigrationTools::ElasticMigrationCreator.new.execute if $PROGRAM_NAME == __FILE__