scottwillson/racing_on_rails

# frozen_string_literal: true

# Road, track, criterium, time trial ...
# Cached. Call +reset+ to clear cache.
class Discipline < ApplicationRecord
  has_many :calculation_category_mappings, dependent: :destroy, class_name: "Calculations::V3::CategoryMapping"
  has_many :discipline_aliases
  has_and_belongs_to_many :bar_categories, class_name: "::Category", join_table: "discipline_bar_categories"
  has_many :races, inverse_of: :discipline, dependent: :restrict_with_error

  @@all_aliases = nil
  @@names = nil

  scope :numbers, -> { where(numbers: true) }

  # Look up Discipline by name or alias. Caches Disciplines in memory
  def self.[](name)
    return nil unless name

    load_aliases if @@all_aliases.nil?
    if name.is_a?(Symbol)
      @@all_aliases[name]
    else
      return nil if name.blank?

      @@all_aliases[name.underscore.tr(" ", "_").to_sym]
    end
  end

  def self.find_all_bar
    Discipline.where(bar: true)
  end

  def self.find_via_alias(name)
    Discipline[name]
  end

  def self.load_aliases
    @@all_aliases = {}
    Discipline.connection.select_all("SELECT discipline_id, alias FROM discipline_aliases").each do |result|
      @@all_aliases[result["alias"].underscore.tr(" ", "_").to_sym] = Discipline.find(result["discipline_id"].to_i)
    end
    Discipline.all.find_each do |discipline|
      @@all_aliases[discipline.name.tr(" ", "_").underscore.to_sym] = discipline
    end
  end

  # Clear out cached @@aliases
  def self.reset
    @@all_aliases = nil
    @@names = nil
  end

  def self.names
    @@names ||= Discipline.all.map(&:name)
  end

  def names
    case name
    when "Road"
      [nil, "", "Circuit", "Criterium", "Road", "Gravel", "Time Trial", "Singlespeed", "Tour"]
    when "Mountain Bike"
      ["Downhill", "Mountain Bike", "Super D", "Short Track"]
    else
      [name]
    end
  end

  def to_param
    @param || @param = name.underscore.tr(" ", "_")
  end

  def <=>(other)
    name <=> other.name
  end

  def to_s
    "<#{self.class} #{id} #{name}>"
  end
end