# Toplevel Pubnub module.
# frozen_string_literal: true

module Pubnub
  # Holds RemoveMemberships functionality
  class RemoveMemberships < SingleEvent
    include Concurrent::Async
    include Pubnub::Validator::RemoveMemberships

    def initialize(options, app)
      @event = current_operation
      @telemetry_name = :l_obj
      @uuid = options[:uuid].nil? ? app.env[:uuid] : options[:uuid]
      @limit = [options[:limit], 100].min unless options[:limit].nil?
      @sort = options[:sort].join(",") if options[:sort] && !options[:sort].empty?
      @filter = options[:filter] if options[:filter] && !options[:filter].empty?
      @start = options[:start] if options[:start] && !options[:start].empty?
      @end = options[:end] if options[:start] && !options[:end].empty?

      if options[:include]
        include = options[:include]
        @include_count = [0, '0', false].include?(include[:count]) ? "0" : "1" unless include[:count].nil?
        @include_custom = "custom" if !include[:custom].nil? && ![0, '0', false].include?(include[:custom])
        @include_channel_metadata = "channel" if !include[:channel_metadata].nil? && ![0, '0', false].include?(include[:channel_metadata])
        @include_channel_custom = "channel.custom" if !include[:channel_custom].nil? && ![0, '0', false].include?(include[:channel_custom])

        @include = [@include_custom, @include_channel_metadata, @include_channel_custom].reject { |flag| flag.to_s.empty? }
      end

      @channels = options[:channels] if options[:channels] && !options[:channels].empty?

      # Collections by default return number of available entries.
      @include_count = "1" if @include_count.nil?

      super
    end

    def fire
      Pubnub.logger.debug('Pubnub::RemoveMemberships') { "Fired event #{self.class}" }

      memberships = @channels.map do |membership|
        { channel: { id: membership } }
      end

      body = Formatter.format_message({ delete: memberships }, @cipher_key, false)
      response = send_request(body)

      envelopes = fire_callbacks(handle(response, uri))
      finalize_event(envelopes)
      envelopes
    end

    private

    def current_operation
      Pubnub::Constants::OPERATION_REMOVE_MEMBERSHIPS
    end

    def parameters(signature = false)
      parameters = super(signature)
      parameters[:limit] = @limit unless @limit.nil?
      parameters[:sort] = @sort unless @sort.nil?
      parameters[:filter] = @filter unless @filter.nil?
      parameters[:start] = @start unless @start.nil?
      parameters[:end] = @end if @end && !@start
      parameters[:count] = @include_count unless @include_count.nil?
      parameters[:include] = @include.sort.join(",") if @include && !@include.empty?

      parameters
    end

    def path
      '/' + [
        'v2',
        'objects',
        @subscribe_key,
        'uuids',
        Formatter.encode(@uuid),
        'channels'
      ].join('/')
    end

    def valid_envelope(parsed_response, req_res_objects)
      memberships = parsed_response['data'].map { |uuid_membership|
        membership = Hash.new
        uuid_membership.each{ |k,v| membership[k.to_sym] = v }

        unless membership[:channel].nil?
          channel_metadata = Hash.new
          membership[:channel].each{ |k,v| channel_metadata[k.to_sym] = v }
          channel_metadata[:updated] = Date._parse(channel_metadata[:updated]) unless channel_metadata[:updated].nil?
          membership[:channel] = channel_metadata
        end
        membership[:updated] = Date._parse(membership[:updated]) unless membership[:updated].nil?

        membership
      }

      Pubnub::Envelope.new(
        event: @event,
        event_options: @given_options,
        timetoken: nil,

        result: {
          code: req_res_objects[:response].code,
          operation: current_operation,
          client_request: req_res_objects[:request],
          server_response: req_res_objects[:response],
          data: {
            memberships: memberships,
            totalCount: parsed_response['totalCount'],
            next: parsed_response['next'],
            prev: parsed_response['prev']
          }
        },

        status: {
          code: req_res_objects[:response].code,
          operation: current_operation,
          client_request: req_res_objects[:request],
          server_response: req_res_objects[:response],
          data: nil,
          category: Pubnub::Constants::STATUS_ACK,
          error: false,
          auto_retried: false,

          current_timetoken: nil,
          last_timetoken: nil,
          subscribed_channels: nil,
          subscribed_channel_groups: nil,

          config: get_config
        }
      )
    end
  end
end