class Comment < ApplicationRecord
  include SearchableModel

  auto_strip_attributes :message, nullify: false
  validates :message,
            presence: true,
            length: { maximum: Constants::TEXT_MAX_LENGTH }
  validates :user, presence: true

  belongs_to :user, inverse_of: :comments
  belongs_to :last_modified_by, foreign_key: 'last_modified_by_id', class_name: 'User', optional: true

  def self.search(
    user,
    include_archived,
    query = nil,
    page = 1,
    _current_team = nil,
    options = {}
  )
    project_ids = Project.search(user, include_archived, nil, Constants::SEARCH_NO_LIMIT)
                         .pluck(:id)
    my_module_ids = MyModule.search(user, include_archived, nil, Constants::SEARCH_NO_LIMIT)
                            .pluck(:id)
    step_ids = Step.search(user, include_archived, nil, Constants::SEARCH_NO_LIMIT)
                   .pluck(:id)
    result_ids = Result.search(user, include_archived, nil, Constants::SEARCH_NO_LIMIT)
                       .pluck(:id)

    new_query = Comment.distinct
                       .joins(:user)
                       .where(
                         '(comments.associated_id IN (?) AND comments.type = ?) OR ' \
                         '(comments.associated_id IN (?) AND comments.type = ?) OR ' \
                         '(comments.associated_id IN (?) AND comments.type = ?) OR ' \
                         '(comments.associated_id IN (?) AND comments.type = ?)',
                         project_ids, 'ProjectComment',
                         my_module_ids, 'TaskComment',
                         step_ids, 'StepComment',
                         result_ids, 'ResultComment'
                       )
                       .where_attributes_like(['message', 'users.full_name'], query, options)

    # Show all results if needed
    if page == Constants::SEARCH_NO_LIMIT
      new_query
    else
      new_query.limit(Constants::SEARCH_LIMIT).offset((page - 1) * Constants::SEARCH_LIMIT)
    end
  end

  def self.mark_as_seen_by(user, commentable)
    # rubocop:disable Rails/SkipsModelValidations
    all.where('? = ANY (unseen_by)', user.id).update_all("unseen_by = array_remove(unseen_by, #{user.id.to_i}::bigint)")

    # Because we want the number of unseen comments to affect the cache of project
    # and experiment lists, we need to set the updated_at of Project or Experiment.
    commentable.touch if commentable.class.in? [Project, Experiment]

    # rubocop:enable Rails/SkipsModelValidations
  end
end