require "./version.cr"
require "json"

module ID3 extend self
	# A decision tree class which consists of a recursive set of decision tree nodes.
	class Tree
		# Initializes the decision tree.
		#
		# **Arguments**:
		#
		# `training`
		# - A `JSON::Any` object of the training set
		#
		# `d`
		# - The index of dependent variable in the attribute list
		def initialize(@training : JSON::Any, d = -1)
			dependent = @training["attributes"][d]

			attributes = @training["attributes"].as_a
			attributes.delete_at(d)

			data = @training["data"]

			puts dependent
			puts attributes
		end
	end

	def retr_json(path)
		File.open(path) do |file|
			JSON.parse(file)
		end
	end
end