# frozen_string_literal: true

class Api::V1::BookmarksController < Api::BaseController
  before_action -> { doorkeeper_authorize! :read, :'read:bookmarks' }
  before_action :require_user!
  after_action :insert_pagination_headers

  def index
    @statuses = load_statuses

    if compact?
      render json: CompactStatusesPresenter.new(statuses: @statuses), serializer: REST::CompactStatusesSerializer
    else
      account_ids = @statuses.filter(&:quote?).map { |status| status.quote.account_id }.uniq

      render json: @statuses, each_serializer: REST::StatusSerializer, relationships: StatusRelationshipsPresenter.new(@statuses, current_user&.account_id), account_relationships: AccountRelationshipsPresenter.new(account_ids, current_user&.account_id)
    end
  end

  private

  def load_statuses
    cached_bookmarks
  end

  def cached_bookmarks
    cache_collection(results.map(&:status), Status)
  end

  def results
    @_results ||= filtered_account_bookmarks.to_a_paginated_by_id(
      limit_param(DEFAULT_STATUSES_LIMIT),
      params_slice(:max_id, :since_id, :min_id)
    )
  end

  def filtered_account_bookmarks
    account_bookmarks.joins(:status).eager_load(:status).tap do |scope|
      scope.merge!(media_only_scope)    if media_only?
      scope.merge!(without_media_scope) if without_media?
    end
  end

  def account_bookmarks
    current_account.bookmarks
  end

  def media_only?
    truthy_param?(:only_media)
  end

  def without_media?
    truthy_param?(:without_media)
  end

  def compact?
    truthy_param?(:compact)
  end

  def media_only_scope
    Status.joins(:media_attachments)
  end

  def without_media_scope
    Status.left_joins(:media_attachments).where(media_attachments: {status_id: nil})
  end

  def insert_pagination_headers
    set_pagination_headers(next_path, prev_path)
  end

  def next_path
    api_v1_bookmarks_url pagination_params(max_id: pagination_max_id) if records_continue?
  end

  def prev_path
    api_v1_bookmarks_url pagination_params(min_id: pagination_since_id) unless results.empty?
  end

  def pagination_max_id
    results.last.id
  end

  def pagination_since_id
    results.first.id
  end

  def records_continue?
    results.size == limit_param(DEFAULT_STATUSES_LIMIT)
  end

  def pagination_params(core_params)
    params_slice(:limit, :compact, :only_media, :without_media).merge(core_params)
  end
end
