# frozen_string_literal: true

require_relative '../../config/boot'
require_relative '../../config/environment'
require_relative 'cli_helper'

module Mastodon
  class StatusesCLI < Thor
    include ActionView::Helpers::NumberHelper

    def self.exit_on_failure?
      true
    end

    option :days, type: :numeric, default: 90
    desc 'remove', 'Remove statuses'
    def remove
      say('Creating temporary database indices...')

      ActiveRecord::Base.connection.add_index(:accounts, :id, name: :index_accounts_local, where: 'domain is null', algorithm: :concurrently) unless ActiveRecord::Base.connection.index_name_exists?(:accounts, :index_accounts_local)
      ActiveRecord::Base.connection.add_index(:status_pins, :status_id, name: :index_status_pins_status_id, algorithm: :concurrently) unless ActiveRecord::Base.connection.index_name_exists?(:status_pins, :index_status_pins_status_id)
      ActiveRecord::Base.connection.add_index(:media_attachments, :remote_url, name: :index_media_attachments_remote_url, where: 'remote_url is not null', algorithm: :concurrently) unless ActiveRecord::Base.connection.index_name_exists?(:media_attachments, :index_media_attachments_remote_url)

      max_id   = Mastodon::Snowflake.id_at(options[:days].days.ago)
      start_at = Time.now.to_f

      say('Beginning removal... This might take a while...')

      Status.remote
            .where('id < ?', max_id)
            .where(reblog_of_id: nil)                                                                                                                                                                                              # Skip reblogs
            .where(in_reply_to_id: nil)                                                                                                                                                                                            # Skip replies
            .where('id NOT IN (SELECT status_pins.status_id FROM status_pins WHERE statuses.id = status_id)')                                                                                                                      # Skip statuses that are pinned on profiles
            .where('id NOT IN (SELECT mentions.status_id FROM mentions WHERE statuses.id = mentions.status_id AND mentions.account_id IN (SELECT accounts.id FROM accounts WHERE domain IS NULL))')                                # Skip statuses that mention local accounts
            .where('id NOT IN (SELECT statuses1.in_reply_to_id FROM statuses AS statuses1 WHERE statuses.id = statuses1.in_reply_to_id)')                                                                                          # Skip statuses favourited by local accounts
            .where('id NOT IN (SELECT statuses1.reblog_of_id FROM statuses AS statuses1 WHERE statuses.id = statuses1.reblog_of_id AND statuses1.account_id IN (SELECT accounts.id FROM accounts WHERE accounts.domain IS NULL))') # Skip statuses reblogged by local accounts
            .where('account_id NOT IN (SELECT follows.target_account_id FROM follows WHERE statuses.account_id = follows.target_account_id)')                                                                                      # Skip accounts followed by local accounts
            .in_batches
            .delete_all

      say('Beginning removal of now-orphaned media attachments to free up disk space...')

      Scheduler::MediaCleanupScheduler.new.perform

      say("Done after #{Time.now.to_f - start_at}s", :green)
    ensure
      say('Removing temporary database indices to restore write performance...')

      ActiveRecord::Base.connection.remove_index(:accounts, name: :index_accounts_local) if ActiveRecord::Base.connection.index_name_exists?(:accounts, :index_accounts_local)
      ActiveRecord::Base.connection.remove_index(:status_pins, name: :index_status_pins_status_id) if ActiveRecord::Base.connection.index_name_exists?(:status_pins, :index_status_pins_status_id)
      ActiveRecord::Base.connection.remove_index(:media_attachments, name: :index_media_attachments_remote_url) if ActiveRecord::Base.connection.index_name_exists?(:media_attachments, :index_media_attachments_remote_url)
    end
  end
end