require "tapestry/errors"

module Tapestry
  module Situation
    private

    def url_is_empty
      puts "PROBLEM: url_is attribute empty.\n" \
      "The url_is attribute is empty on the definition " \
      "'#{retrieve_class(caller)}'.\n\n"
      raise Tapestry::Errors::NoUrlForDefinition
    end

    def no_url_provided
      puts "PROBLEM: no url provided.\n" \
      "You called a '#{retrieve_method(caller)}' action but the " \
      "definition '#{self.class}' does not have a url_is attribute.\n" \
      "Either provide the url_is attribute or pass the url as an " \
      "argument to the visit call.\n\n"
      raise Tapestry::Errors::NoUrlForDefinition
    end

    def url_match_is_empty
      puts "PROBLEM: url_matches attribute empty.\n" \
      "The url_matches attribute is empty on the definition " \
      "'#{retrieve_class(caller)}'.\n\n"
      raise Tapestry::Errors::NoUrlMatchForDefinition
    end

    def no_url_match_is_possible
      puts "PROBLEM: No url_is or url_matches attribute.\n" \
      "You called a '#{retrieve_method(caller)}' action but the " \
      "definition '#{self.class}' has no url_is attribute nor a " \
      "url_matches attribute.\n\n"
      raise Tapestry::Errors::NoUrlMatchPossible
    end

    def title_is_empty
      puts "PROBLEM: title_is attribute empty.\n" \
      "The title_is attribute is empty on the definition " \
      "'#{retrieve_class(caller)}'.\n\n"
      raise Tapestry::Errors::NoTitleForDefinition
    end

    def no_title_is_provided
      puts "PROBLEM: No title provided.\n" \
      "You called a '#{retrieve_method(caller)}' action but the " \
      "definition '#{self.class}' does not have a title_is attribute.\n\n"
      raise Tapestry::Errors::NoTitleForDefinition
    end

    def not_ready_validation(message)
      puts "PROBLEM: A ready validation error was encountered.\n" \
      "A ready validation failed to validate. The ready check was " \
      "on the '#{self.class}' definition. " \
      "The reason provided was:\n" \
      "#{message}.\n\n"
      raise Tapestry::Errors::PageNotValidatedError, message
    end

    def no_ready_check_possible
      puts "PROBLEM: A when ready call has no action.\n" \
      "You called a when_ready on a definition but did not provide " \
      "any action for it. Add a block with logic that should be " \
      "executed if the ready check passes.\n\n"
      raise Tapestry::Errors::NoBlockForWhenReady
    end

    def retrieve_class(caller)
      caller[1][/`.*'/][8..-3]
    end

    def retrieve_method(caller)
      caller[0][/`.*'/][1..-2]
    end
  end
end