class LfsObject < ActiveRecord::Base
  include AfterCommitQueue
  include ObjectStorage::BackgroundMove

  has_many :lfs_objects_projects, dependent: :destroy # rubocop:disable Cop/ActiveRecordDependent
  has_many :projects, through: :lfs_objects_projects

  scope :with_files_stored_locally, -> { where(file_store: [nil, LfsObjectUploader::Store::LOCAL]) }

  validates :oid, presence: true, uniqueness: true

  mount_uploader :file, LfsObjectUploader

  after_save :update_file_store, if: :file_changed?

  def update_file_store
    # The file.object_store is set during `uploader.store!`
    # which happens after object is inserted/updated
    self.update_column(:file_store, file.object_store)
  end

  def project_allowed_access?(project)
    projects.exists?(project.lfs_storage_project.id)
  end

  def local_store?
    [nil, LfsObjectUploader::Store::LOCAL].include?(self.file_store)
  end

  def self.destroy_unreferenced
    joins("LEFT JOIN lfs_objects_projects ON lfs_objects_projects.lfs_object_id = #{table_name}.id")
        .where(lfs_objects_projects: { id: nil })
        .destroy_all
  end

  def self.calculate_oid(path)
    Digest::SHA256.file(path).hexdigest
  end
end