# frozen_string_literal: true

require 'plumb/steppable'

module Plumb
  class MatchClass
    include Steppable

    attr_reader :matcher

    def initialize(matcher = Undefined, error: nil)
      raise TypeError 'matcher must respond to #===' unless matcher.respond_to?(:===)

      @matcher = matcher
      @error = error.nil? ? build_error(matcher) : (error % matcher)
    end

    def inspect
      %(#{name}[#{@matcher.inspect}])
    end

    def call(result)
      @matcher === result.value ? result : result.invalid(errors: @error)
    end

    private def build_error(matcher)
      case matcher
      when Class # A class primitive, ex. String, Integer, etc.
        "Must be a #{matcher}"
      when ::String, ::Symbol, ::Numeric, ::TrueClass, ::FalseClass, ::NilClass, ::Array, ::Hash
        "Must be equal to #{matcher}"
      when ::Range
        "Must be within #{matcher}"
      else
        "Must match #{matcher.inspect}"
      end
    end
  end
end