module Tournaments
  class SwapSides
    class LiveBroadcastError < StandardError; end

    def self.call(match:)
      new(match).call
    end

    def initialize(match)
      @match = match
    end

    def call
      tournament = @match.tournament
      raise ArgumentError, "not a tournament match" unless tournament

      Tournaments::Entitlements.new(tournament.club).assert_writable!
      unless tournament.writable?
        raise Tournaments::EntitlementError.new(
          I18n.t("flash.tournaments.archived_locked"),
          code: "archived"
        )
      end
      raise LiveBroadcastError, I18n.t("flash.matches.close_live_before_delete") unless @match.deletable?

      home_id = @match.home_participant_id
      away_id = @match.away_participant_id
      home_score = @match.home_score
      away_score = @match.away_score
      home_source_kind = @match.home_source_kind
      away_source_kind = @match.away_source_kind
      home_source_match_id = @match.home_source_match_id
      away_source_match_id = @match.away_source_match_id
      home_source_group_id = @match.home_source_group_id
      away_source_group_id = @match.away_source_group_id
      home_source_rank = @match.home_source_rank
      away_source_rank = @match.away_source_rank

      @match.update!(
        home_participant_id: away_id,
        away_participant_id: home_id,
        home_score: away_score,
        away_score: home_score,
        home_source_kind: away_source_kind,
        away_source_kind: home_source_kind,
        home_source_match_id: away_source_match_id,
        away_source_match_id: home_source_match_id,
        home_source_group_id: away_source_group_id,
        away_source_group_id: home_source_group_id,
        home_source_rank: away_source_rank,
        away_source_rank: home_source_rank,
        result_status: swapped_result_status
      )
      @match
    end

    private

    def swapped_result_status
      case @match.result_status
      when "walkover_home" then "walkover_away"
      when "walkover_away" then "walkover_home"
      else @match.result_status
      end
    end
  end
end