class Domain < ActiveRecord::Base
  include Versions # version/domain_version.rb
  has_paper_trail class_name: "DomainVersion", meta: { children: :children_log }

  # TODO: whois requests ip whitelist for full info for own domains and partial info for other domains
  # TODO: most inputs should be trimmed before validatation, probably some global logic?
  paginates_per 10 # just for showoff

  belongs_to :registrar
  belongs_to :owner_contact, class_name: 'Contact'

  has_many :domain_contacts, dependent: :delete_all
  accepts_nested_attributes_for :domain_contacts, allow_destroy: true

  has_many :tech_contacts,
           -> { where(domain_contacts: { contact_type: DomainContact::TECH }) },
           through: :domain_contacts, source: :contact

  has_many :admin_contacts,
           -> { where(domain_contacts: { contact_type: DomainContact::ADMIN }) },
           through: :domain_contacts, source: :contact

  has_many :nameservers, dependent: :delete_all

  accepts_nested_attributes_for :nameservers, allow_destroy: true,
                                              reject_if: proc { |attrs| attrs[:hostname].blank? }

  has_many :domain_statuses, dependent: :delete_all
  accepts_nested_attributes_for :domain_statuses, allow_destroy: true,
                                                  reject_if: proc { |attrs| attrs[:value].blank? }

  has_many :domain_transfers, dependent: :delete_all

  has_many :dnskeys, dependent: :delete_all

  has_many :keyrelays

  accepts_nested_attributes_for :dnskeys, allow_destroy: true

  has_many :legal_documents, as: :documentable
  accepts_nested_attributes_for :legal_documents, reject_if: proc { |attrs| attrs[:body].blank? }

  delegate :code,  to: :owner_contact, prefix: true
  delegate :email, to: :owner_contact, prefix: true
  delegate :ident, to: :owner_contact, prefix: true
  delegate :phone, to: :owner_contact, prefix: true
  delegate :name,  to: :registrar, prefix: true

  before_create :generate_auth_info
  before_create :set_validity_dates
  before_save :touch_always_version
  def touch_always_version
    self.updated_at = Time.now
  end
  before_save :update_whois_body
  after_save :manage_automatic_statuses
  after_save :delay_whois_server_update
  def delay_whois_server_update
    return if whois_body.blank?
    delay.whois_server_update(name, whois_body)
  end

  validates :name_dirty, domain_name: true, uniqueness: true
  validates :period, numericality: { only_integer: true }
  validates :owner_contact, :registrar, presence: true

  validate :validate_period

  validates :nameservers, object_count: {
    min: -> { Setting.ns_min_count },
    max: -> { Setting.ns_max_count }
  }

  validates :dnskeys, object_count: {
    min: -> { Setting.dnskeys_min_count },
    max: -> { Setting.dnskeys_max_count }
  }

  validates :admin_domain_contacts, object_count: {
    association: 'admin_contacts',
    min: -> { Setting.admin_contacts_min_count },
    max: -> { Setting.admin_contacts_max_count }
  }

  validates :tech_domain_contacts, object_count: {
    association: 'tech_contacts',
    min: -> { Setting.tech_contacts_min_count },
    max: -> { Setting.tech_contacts_max_count }
  }

  validates :nameservers, uniqueness_multi: {
    attribute: 'hostname'
  }

  validates :tech_domain_contacts, uniqueness_multi: {
    association: 'domain_contacts',
    attribute: 'contact_code_cache'
  }

  validates :admin_domain_contacts, uniqueness_multi: {
    association: 'domain_contacts',
    attribute: 'contact_code_cache'
  }

  validates :domain_statuses, uniqueness_multi: {
    attribute: 'value'
  }

  validates :dnskeys, uniqueness_multi: {
    attribute: 'public_key'
  }

  validate :validate_nameserver_ips

  attr_accessor :owner_contact_typeahead, :update_me

  def tech_domain_contacts
    domain_contacts.select { |x| x.contact_type == DomainContact::TECH }
  end

  def admin_domain_contacts
    domain_contacts.select { |x| x.contact_type == DomainContact::ADMIN }
  end

  def name=(value)
    value.strip!
    value.downcase!
    self[:name] = SimpleIDN.to_unicode(value)
    self[:name_puny] = SimpleIDN.to_ascii(value)
    self[:name_dirty] = value
  end

  def owner_contact_typeahead
    @owner_contact_typeahead || owner_contact.try(:name) || nil
  end

  def pending_transfer
    domain_transfers.find_by(status: DomainTransfer::PENDING)
  end

  def can_be_deleted?
    (domain_statuses.pluck(:value) & %W(
      #{DomainStatus::SERVER_DELETE_PROHIBITED}
    )).empty?
  end

  ### VALIDATIONS ###

  def validate_nameserver_ips
    nameservers.each do |ns|
      next unless ns.hostname.end_with?(name)
      next if ns.ipv4.present?
      errors.add(:nameservers, :invalid) if errors[:nameservers].blank?
      ns.errors.add(:ipv4, :blank)
    end
  end

  def validate_period
    return unless period.present?
    if period_unit == 'd'
      valid_values = %w(365 366 710 712 1065 1068)
    elsif period_unit == 'm'
      valid_values = %w(12 24 36)
    else
      valid_values = %w(1 2 3)
    end

    errors.add(:period, :out_of_range) unless valid_values.include?(period.to_s)
  end

  # used for highlighting form tabs
  def parent_valid?
    assoc_errors = errors.keys.select { |x| x.match(/\./) }
    (errors.keys - assoc_errors).empty?
  end

  def statuses_tab_valid?
    !errors.keys.any? { |x| x.match(/domain_statuses/) }
  end

  ## SHARED

  def name_in_wire_format
    res = ''
    parts = name.split('.')
    parts.each do |x|
      res += sprintf('%02X', x.length) # length of label in hex
      res += x.each_byte.map { |b| sprintf('%02X', b) }.join # label
    end

    res += '00'

    res
  end

  def to_s
    name
  end

  # rubocop:disable Lint/Loop
  def generate_auth_info
    begin
      self.auth_info = SecureRandom.hex
    end while self.class.exists?(auth_info: auth_info)
  end
  # rubocop:enable Lint/Loop

  def set_validity_dates
    self.registered_at = Time.zone.now
    self.valid_from = Date.today
    self.valid_to = valid_from + self.class.convert_period_to_time(period, period_unit)
  end

  def manage_automatic_statuses
    if domain_statuses.empty? && valid?
      domain_statuses.create(value: DomainStatus::OK)
    elsif domain_statuses.length > 1 || !valid?
      domain_statuses.find_by(value: DomainStatus::OK).try(:destroy)
    end
  end

  def children_log
    log = HashWithIndifferentAccess.new
    log[:admin_contacts] = admin_contacts.map(&:attributes)
    log[:tech_contacts]  = tech_contacts.map(&:attributes)
    log[:nameservers]    = nameservers.map(&:attributes)
    log[:owner_contact]  = [owner_contact.try(:attributes)]
    log
  end

  # rubocop:disable Metrics/MethodLength
  def update_whois_body
    self.whois_body = <<-EOS
    This Whois Server contains information on
    Estonian Top Level Domain ee TLD

    domain:    #{name}
    registrar: #{registrar}
    status:
    registered:
    changed:   #{updated_at.to_s(:db)}
    expire:
    outzone:
    delete:

    contact
    name:
    e-mail:
    registrar:
    created:

    contact:

    nsset:
    nserver:

    registrar:
    org:
    url:
    phone:
    address:
    created:
    changed:
    EOS
  end
  # rubocop:enabled Metrics/MethodLength

  def whois_server_update(name, whois_body)
    wd = Whois::Domain.find_or_initialize_by(name: name)
    wd.whois_body = whois_body
    wd.save
  end

  class << self
    def convert_period_to_time(period, unit)
      return period.to_i.days   if unit == 'd'
      return period.to_i.months if unit == 'm'
      return period.to_i.years  if unit == 'y'
    end
  end
end