module Teams
  # Elenco pubblico delle squadre con presenza su Match Live TV (diretta, replay o calendario).
  class PublicDirectory
    Entry = Struct.new(
      :team,
      :live_now,
      :replay_count,
      :upcoming_count,
      :last_activity_at,
      keyword_init: true
    )

    def self.call(q: nil, sport: nil, live: false, replays: false)
      new(q: q, sport: sport, live: live, replays: replays).call
    end

    def initialize(q: nil, sport: nil, live: false, replays: false)
      @q = q.to_s.strip
      @sport = normalize_sport(sport)
      @live = cast_bool(live)
      @replays = cast_bool(replays)
    end

    def call
      teams = base_teams
      return [] if teams.empty?

      entries = build_entries(teams)
      entries = apply_toggle_filters(entries)
      sort_entries(entries)
    end

    private

    def normalize_sport(value)
      key = value.to_s.strip
      return nil if key.blank?
      return nil unless Sports::Catalog.find_optional(key)

      Sports::Catalog.normalize_key(key)
    end

    def cast_bool(value)
      ActiveModel::Type::Boolean.new.cast(value)
    end

    def base_teams
      scope = Team.includes(:club).where(id: active_team_ids)
      scope = scope.where(sport_key: @sport) if @sport
      scope = apply_search(scope) if @q.present?
      scope.to_a
    end

    def active_team_ids
      live = live_team_ids
      replays = replay_team_ids
      upcoming = upcoming_team_ids
      (live + replays + upcoming).uniq
    end

    def live_team_ids
      StreamSession.broadcasting
        .publicly_listed
        .where(platform: "matchlivetv")
        .joins(:match)
        .distinct
        .pluck("matches.team_id")
    end

    def replay_team_ids
      Recording.ready.publicly_listed.joins(stream_session: :match).distinct.pluck("matches.team_id")
    end

    def upcoming_team_ids
      broadcasting_match_ids = StreamSession.broadcasting.select(:match_id)
      Match.scheduled_for_live
        .where.not(id: broadcasting_match_ids)
        .distinct
        .pluck(:team_id)
    end

    def apply_search(scope)
      term = "%#{ActiveRecord::Base.sanitize_sql_like(@q)}%"
      scope.left_joins(:club, :matches).where(
        "teams.name ILIKE :term OR clubs.name ILIKE :term OR matches.location ILIKE :term OR matches.opponent_name ILIKE :term",
        term: term
      ).distinct
    end

    def build_entries(teams)
      team_ids = teams.map(&:id)
      live_set = live_team_ids.to_set
      replay_counts = Recording.ready.publicly_listed
        .joins(stream_session: :match)
        .where(matches: { team_id: team_ids })
        .group("matches.team_id")
        .count
      last_replay_at = Recording.ready.publicly_listed
        .joins(stream_session: :match)
        .where(matches: { team_id: team_ids })
        .group("matches.team_id")
        .maximum(:recorded_at)
      last_live_at = StreamSession.broadcasting
        .publicly_listed
        .joins(:match)
        .where(matches: { team_id: team_ids })
        .group("matches.team_id")
        .maximum(:started_at)
      broadcasting_match_ids = StreamSession.broadcasting.select(:match_id)
      upcoming_counts = Match.scheduled_for_live
        .where(team_id: team_ids)
        .where.not(id: broadcasting_match_ids)
        .group(:team_id)
        .count

      teams.map do |team|
        last_activity = [last_replay_at[team.id], last_live_at[team.id]].compact.max
        Entry.new(
          team: team,
          live_now: live_set.include?(team.id),
          replay_count: replay_counts[team.id].to_i,
          upcoming_count: upcoming_counts[team.id].to_i,
          last_activity_at: last_activity
        )
      end
    end

    def apply_toggle_filters(entries)
      entries = entries.select(&:live_now) if @live
      entries = entries.select { |entry| entry.replay_count.positive? } if @replays
      entries
    end

    def sort_entries(entries)
      entries.sort_by do |entry|
        [
          entry.live_now ? 0 : 1,
          -(entry.last_activity_at&.to_i || 0),
          entry.team.name.downcase
        ]
      end
    end
  end
end