require 'rspec/core/formatters/base_text_formatter'

### SpeckyFormatter: A basic RSpec 2.x text formatter, to be used

### with the 'Specky' vim plugin (or from the command line, if you

### dig it over the default 'documentation' format!)

###

### rspec -r /path/to/this/specky_formatter.rb -f SpeckyFormatter specs

###

class SpeckyFormatter < RSpec::Core::Formatters::BaseTextFormatter

	def initialize( *args )

		super

		@indent_level  = 0

		@failure_index = 0

		@failures      = []

		@txt           = ''

		@summary       = ''

	end

	########################################################################

	### R S P E C  H O O K S

	########################################################################

	### Example group hook -- increase indentation, emit description

	###

	def example_group_started( example_group )

		self.out '+', '-' * (example_group.description.length + 2), '+'

		self.out '| ', example_group.description, ' |'

		self.out '+', '-' * (example_group.description.length + 2), '+'

		@indent_level += 1

	end

	### Example group hook -- decrease indentation

	###

	def example_group_finished( example_group )

		@indent_level -= 1

	end

	### Called on example success

	###

	def example_passed( example )

		msg = self.format_example( example )

		msg << ')'

		self.out msg

	end

	### Called on a pending example

	###

	def example_pending( example )

		msg = self.format_example( example )

		pending_msg = example.metadata[ :execution_result ][ :pending_message ]

		msg << ", PENDING%s)" % [ ": #{pending_msg}" || '' ]

		self.out msg

	end

	### Called on example failure

	###

	def example_failed( example )

		@failure_index += 1

		msg = self.format_example( example )

		msg << ", FAILED - #%d)" % [ @failure_index ]

		self.out msg

		@failures << example

	end

	### Called after all examples are run.  Emit details for each failed example,

	### for Vim to fold.

	###

	def dump_failures

		self.out "\n" unless @failures.empty?

		@failures.each_with_index do |example, index|

			desc      = example.metadata[ :full_description ]

			exception = example.execution_result[ :exception ]

			file = line = nil

			self.out "FAILURE - #%d)" % [ index + 1 ]

				self.out "%s FIXED" % [ desc ]

				self.out "Expected pending '%s' to fail.  No error was raised." % [

					example.metadata[ :execution_result ][ :pending_message ]

				]

			else

				self.out desc

				self.out "Failure/Error: %s" %  [ read_failed_line( exception, example).strip ]

				exception.message.split("\n").each {|l| self.out l}

				# logic taken from the base class

				example.example_group.ancestors.push(example.example_group).each do |group|

					if group.metadata[:shared_group_name]

						self.out "Shared Example Group: \"#{group.metadata[:shared_group_name]}\" called from " +

							"#{backtrace_line(group.metadata[:example_group][:location])}"

						break

					end

				end

			end

		end

	end

	### Emit the source of the exception, with context lines.

	###

	def exception_source( file, line )

		context = ''

		low, high = line - 3, line + 3

		File.open( file ).each_with_index do |cline, i|

			cline.chomp!.rstrip!

			next unless i >= low && i <= high

			context << "  %s%4d: %s\n" % [ ( i == line ? '>>' : ' |' ), i, cline ]

		end

		return context

	rescue

		'Unable to parse exception context lines.'

	end

	### Emit summary data for all examples.

	###

	def dump_summary( duration, example_count, failure_count, pending_count )

		succeeded = example_count - failure_count - pending_count

		@summary << "+%s+\n" % [ '-' * 49 ]

		@summary << "|%s-- Summary --%s|\n" % [ ' ' * 18, ' ' * 18 ]

		@summary << "+----------+-----------+--------+---------+-------+\n"

		@summary << "| Duration | Succeeded | Failed | Pending | Total |\n"

		@summary << "+----------+-----------+--------+---------+-------+\n"

		@summary << "| %7ss | %9s | %6s | %7s | %5s |\n" % [

			"%0.3f" % duration, succeeded, failure_count,

			pending_count, example_count

		]

		@summary << "+----------+-----------+--------+---------+-------+\n\n"

	end

	### End of run.  Dump it all out!

	###

	def close

		output.puts @summary

		output.puts @txt

	end

	#########

	protected

	#########

	### Send a string to the output IO object, after indentation.

	###

	def out( *msg )

		msg = msg.join

		@txt << "%s%s\n" % [ '  ' * @indent_level, msg ]

	end

	### Format the basic example information, along with the run duration.

	###

	def format_example( example )

		metadata    = example.metadata

		duration    = metadata[ :execution_result ][ :run_time ]

		description = metadata[ :description ]

		return "| %s (%0.3fs" % [ description, duration ]

	end

end # SpeckyFormatter