# frozen_string_literal: true

# Copyright (c) 2024 Yegor Bugayenko
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the 'Software'), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

require 'judges'
require 'time'

# Injects a fact if it's absent in the factbase.
def if_absent(fb)
  attrs = {}
  f = Judges::Accumulator.new(attrs)
  yield f
  q = attrs.map do |k, v|
    vv = v.to_s
    if v.is_a?(String)
      vv = "'#{vv.gsub('"', '\\\\"').gsub("'", "\\\\'")}'"
    elsif v.is_a?(Time)
      vv = v.utc.iso8601
    end
    "(eq #{k} #{vv})"
  end.join(' ')
  q = "(and #{q})"
  return unless fb.query(q).each.to_a.empty?
  n = fb.insert
  attrs.each { |k, v| n.send("#{k}=", v) }
  n
end

# Predents to be a fact, just accumulating all attribute sets.
# Author:: Yegor Bugayenko (yegor256@gmail.com)
# Copyright:: Copyright (c) 2024 Yegor Bugayenko
# License:: MIT
class Judges::Accumulator
  def initialize(map)
    @map = map
  end

  def method_missing(*args)
    k = args[0]
    if k.end_with?('=')
      @map[k[0..-2].to_sym] = args[1]
    else
      @map[k.to_sym]
    end
  end

  # rubocop:disable Style/OptionalBooleanParameter
  def respond_to?(_method, _include_private = false)
    # rubocop:enable Style/OptionalBooleanParameter
    true
  end

  def respond_to_missing?(_method, _include_private = false)
    true
  end
end