module Public
  class TournamentsController < WebBaseController
    before_action :require_login!
    before_action :set_club, only: %i[index new create]
    before_action :set_tournament, except: %i[index new create]
    before_action :require_owner!
    before_action :require_writable!, only: %i[update generate_group_matches propose_knockout]

    def index
      @tournaments = @club.tournaments.order(starts_on: :desc)
      @can_create = Tournaments::Entitlements.new(@club).premium_full?
    end

    def new
      assert_full!
      return if performed?

      @tournament = @club.tournaments.build(
        sport_key: Sports::Catalog.normalize_key(@club.sport),
        starts_on: Date.current,
        ends_on: Date.current + 1,
        format_kind: "mixed",
        courts: ["Campo 1", "Campo 2"],
        knockout_size: 4
      )
    end

    def create
      @tournament = Tournaments::Create.call(club: @club, attrs: tournament_params)
      redirect_to public_tournament_path(@tournament), notice: t("flash.tournaments.created")
    rescue Tournaments::EntitlementError => e
      redirect_to public_club_billing_path(@club), alert: e.message
    rescue ActiveRecord::RecordInvalid => e
      @tournament = e.record
      flash.now[:alert] = e.record.errors.full_messages.join(", ")
      render :new, status: :unprocessable_entity
    end

    def show
      if params[:tab] == "delega"
        redirect_to public_tournament_path(@tournament, tab: "dirette")
        return
      end

      load_hub!
    end

    def update
      attrs = tournament_params
      file = attrs.delete(:logo_file)
      @tournament.assign_attributes(attrs)
      @tournament.logo_file.attach(file) if file.present?
      @tournament.save!
      redirect_to public_tournament_path(@tournament, tab: hub_tab || params[:tab]), notice: t("flash.tournaments.updated")
    rescue ActiveRecord::RecordInvalid => e
      load_hub!
      flash.now[:alert] = e.record.errors.full_messages.join(", ")
      render :show, status: :unprocessable_entity
    end

    def publish
      assert_full!
      return if performed?

      @tournament.update!(status: "published")
      redirect_to public_tournament_path(@tournament), notice: t("flash.tournaments.published")
    end

    def unpublish
      assert_full!
      return if performed?

      @tournament.update!(status: "draft")
      redirect_to public_tournament_path(@tournament), notice: t("flash.tournaments.unpublished")
    end

    def archive
      assert_full!
      return if performed?

      @tournament.update!(status: "archived")
      redirect_to public_tournament_path(@tournament), notice: t("flash.tournaments.archived")
    end

    def destroy
      Tournaments::Destroy.call(tournament: @tournament)
      redirect_to public_club_tournaments_path(@club), notice: t("flash.tournaments.deleted")
    rescue Tournaments::Destroy::LiveBroadcastError => e
      redirect_to public_tournament_path(@tournament), alert: e.message
    end

    def generate_group_matches
      created = Tournaments::GenerateGroupMatches.call(tournament: @tournament)
      redirect_to public_tournament_path(@tournament, tab: "calendario"),
                  notice: t("flash.tournaments.group_matches_created", count: created.size)
    rescue Tournaments::EntitlementError, ActiveRecord::RecordInvalid => e
      redirect_to public_tournament_path(@tournament, tab: "calendario"), alert: e.message
    end

    def propose_knockout
      updated = Tournaments::ProposeKnockout.call(@tournament)
      redirect_to public_tournament_path(@tournament, tab: "tabellone"),
                  notice: t("flash.tournaments.knockout_proposed", count: updated.size)
    rescue Tournaments::EntitlementError, ActiveRecord::RecordInvalid => e
      redirect_to public_tournament_path(@tournament, tab: "tabellone"), alert: e.message
    end

    private

    def set_club
      @club = Club.find(params[:club_id] || params[:id])
    end

    def set_tournament
      @tournament = Tournament.find(params[:id])
      @club = @tournament.club
    end

    def require_owner!
      require_club_owner!(@club)
    end

    def assert_full!
      Tournaments::Entitlements.new(@club).assert_writable!
    rescue Tournaments::EntitlementError => e
      redirect_to public_club_billing_path(@club), alert: e.message
    end

    def require_writable!
      assert_full!
      return if performed?
      return if @tournament.writable?

      redirect_to public_tournament_path(@tournament), alert: t("flash.tournaments.archived_locked")
    end

    def load_hub!
      @tab = hub_tab || "squadre"
      @participants = @tournament.participants.with_attached_logo_file.includes(:group, :source_team).order(:position, :name)
      @groups = @tournament.groups.order(:position)
      @rounds = @tournament.rounds.order(:position)
      @matches = @tournament.matches.includes(
        { home_participant: { logo_file_attachment: :blob } },
        { away_participant: { logo_file_attachment: :blob } },
        :tournament_group, :tournament_round, :stream_sessions,
        { broadcast_assignments: :user }
      ).order(:scheduled_at)
      @invitations = @tournament.broadcast_invitations.order(created_at: :desc)
      @pending_invites_by_match_id = pending_invites_by_match_id
      @standings_by_group = @groups.index_with { |group| Tournaments::Standings.call(group) }
      @overlap_warnings = overlap_warnings
      @writable = @tournament.writable? && Tournaments::Entitlements.new(@club).premium_full?
    end

    def hub_tab
      raw = params[:tab].to_s
      raw = "dirette" if raw == "delega"
      raw.presence_in(%w[squadre struttura calendario dirette tabellone])
    end

    def pending_invites_by_match_id
      pending = @tournament.broadcast_invitations.pending.to_a
      map = Hash.new { |h, k| h[k] = [] }
      @matches.each do |match|
        pending.each do |invitation|
          map[match.id] << invitation if invitation.covers_match?(match)
        end
      end
      map
    end

    def overlap_warnings
      limit = @tournament.concurrent_limit
      return [] unless limit

      @matches.group_by { |m| m.scheduled_at&.strftime("%Y-%m-%d %H:%M") }.filter_map do |slot, list|
        next if slot.blank? || list.size <= limit

        t("tournaments.hub.overlap_warning", slot: slot, count: list.size, limit: limit)
      end
    end

    def tournament_params
      params.require(:tournament).permit(
        :name, :sport_key, :venue, :starts_on, :ends_on, :format_kind,
        :description, :knockout_size, :courts, :logo_file
      )
    end
  end
end