module KirguduBase
	module DynamicPages
		class Builder
			def initialize(&block)
				instance_eval(&block) if block_given?
			end


			def build_element(element)
				self.builder_options.each_pair do |key, value|
					element.send("#{key}=", value)
				end
				element.fix_parent_entry(nil)
				self.validate_generated_element(element)
			end


			def builder_options
				@options = {} unless @options
				@options
			end

			def validate_empty_parameter(name, value)
				raise "Parameter \"#{name}\" cannot be empty. If you dont want to assign specific value to this parameter, just delete it from code" unless value
			end

			def valiadte_interger_parameter(name, value)
				raise "Parameter \"#{name}\" accepts only integer values" unless value.is_a?(Integer)
			end

			def valiadte_interger_positive_parameter(name, value)
				raise "Parameter \"#{name}\" accepts only integer values" unless value.is_a?(Integer)
				raise "Parameter \"#{name}\" accepts only positive values (>=0)" unless value.is_a?(Integer) if value < 0
			end


			def validate_string_parameter(name, value)
				raise "Parameter \"#{name}\" must be a \"String\"." unless value && value.is_a?(String)
			end

			def validate_symbol_parameter(name, value)
				raise "Parameter \"#{name}\"must be a :Symbol." unless value && value.is_a?(Symbol)
			end

			def validate_string_or_symbol_parameter(name, value)
				raise "Parameter \"#{name}\" must be a \"String\" or a :Symbol." unless value && (value.is_a?(String) || value.is_a?(Symbol))
			end

			def validate_generated_element(element)
				errors = []
				unless element.valid?

					#raise "ERRORS FOR ELEMENT: #{element.errors.methods.to_json}"
					element.errors.each do |key, element_errors|
						errors << "'#{key}' #{element_errors}"
						#raise "ERROR KEY: #{key}; ERROR MESSAGES: #{element_errors}"
						#element_errors.each do |element_error|
						#	errors << "'#{key}' #{element_error}"
						#end
					end
				end
				if errors.length > 0

					raise "ERRORS<br/>
						   Class: #{element.class}
						   Name: #{element.name if element.respond_to?(:name)} <br/>

						   #{errors.join('<br/>')}".html_safe
				end
			end
		end
	end
end