# frozen_string_literal: true

# Released under the MIT License.
# Copyright, 2020-2024, by Samuel Williams.

module Bake
	module Type
		# An ordered list of types. The first type to match the input is used.
		#
		#	```ruby
		#	type = Bake::Type::Any(Bake::Type::String, Bake::Type::Integer)
		#	```
		#
		class Any
			# Initialize the instance with an array of types.
			# @parameter types [Array] the array of types.
			def initialize(types)
				@types = types
			end
			
			# Create a copy of the current instance with the other type appended.
			# @parameter other [Type] the type instance to append.
			def | other
				self.class.new([*@types, other])
			end
			
			# Whether any of the listed types is a composite type.
			# @returns [Boolean] true if any of the listed types is `composite?`.
			def composite?
				@types.any?{|type| type.composite?}
			end
			
			# Parse an input string, trying the listed types in order, returning the first one which doesn't raise an exception.
			# @parameter input [String] the input to parse, e.g. `"5"`.
			def parse(input)
				@types.each do |type|
					return type.parse(input)
				rescue
					# Ignore.
				end
			end
			
			# As a class type, accepts any value.
			def self.parse(value)
				value
			end
			
			# Generate a readable string representation of the listed types.
			def to_s
				"any of #{@types.join(', ')}"
			end
		end
		
		# An extension module which allows constructing `Any` types using the `|` operator.
		module Type
			# Create an instance of `Any` with the arguments as types.
			# @parameter other [Type] the alternative type to match.
			def | other
				Any.new([self, other])
			end
		end
		
		# A type constructor.
		#
		#	```ruby
		#	Any(Integer, String)
		#	```
		#
		# See [Any.initialize](#Bake::Type::Any::initialize).
		#
		def self.Any(*types)
			Any.new(types)
		end
	end
end