# frozen_string_literal: true

class Api::V1::Circles::StatusesController < Api::BaseController
  before_action -> { doorkeeper_authorize! :read, :'read:lists' }, only: [:show]

  before_action :require_user!
  before_action :set_circle

  after_action :insert_pagination_headers, only: :show

  def show
    @statuses = load_statuses
    render json: @statuses, each_serializer: REST::StatusSerializer
  end

  private

  def set_circle
    @circle = current_account.circles.find(params[:circle_id])
  end

  def load_statuses
    if unlimited?
      @circle.statuses.includes(:status_stat).all
    else
      @circle.statuses.includes(:status_stat).paginate_by_max_id(limit_param(DEFAULT_STATUSES_LIMIT), params[:max_id], params[:since_id])
    end
  end

  def insert_pagination_headers
    set_pagination_headers(next_path, prev_path)
  end

  def next_path
    return if unlimited?

    api_v1_circle_statuses_url pagination_params(max_id: pagination_max_id) if records_continue?
  end

  def prev_path
    return if unlimited?

    api_v1_circle_statuses_url pagination_params(since_id: pagination_since_id) unless @statuses.empty?
  end

  def pagination_max_id
    @statuses.last.id
  end

  def pagination_since_id
    @statuses.first.id
  end

  def records_continue?
    @statuses.size == limit_param(DEFAULT_STATUSES_LIMIT)
  end

  def pagination_params(core_params)
    params.slice(:limit).permit(:limit).merge(core_params)
  end

  def unlimited?
    params[:limit] == '0'
  end
end