# emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: t -*-
# vi: set ft=python sts=4 ts=4 sw=4 noet :

# This file is part of Fail2Ban.
#
# Fail2Ban is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# Fail2Ban is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Fail2Ban; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

__author__ = "Yaroslav Halchenko"
__copyright__ = "Copyright (c) 2013 Yaroslav Halchenko"
__license__ = "GPL"

import logging
import os, sys, unittest
import tempfile
import shutil

from glob import glob

from utils import mbasename, TraceBack, FormatterWithTraceBack
from common.helpers import formatExceptionInfo

class HelpersTest(unittest.TestCase):

	def testFormatExceptionInfoBasic(self):
		try:
			raise ValueError("Very bad exception")
		except:
			name, args = formatExceptionInfo()
			self.assertEqual(name, "ValueError")
			self.assertEqual(args, "Very bad exception")

	def testFormatExceptionConvertArgs(self):
		try:
			raise ValueError("Very bad", None)
		except:
			name, args = formatExceptionInfo()
			self.assertEqual(name, "ValueError")
			# might be fragile due to ' vs "
			self.assertEqual(args, "('Very bad', None)")

# based on
# http://stackoverflow.com/questions/2186525/use-a-glob-to-find-files-recursively-in-python
def recursive_glob(treeroot, pattern):
	import fnmatch, os
	results = []
	for base, dirs, files in os.walk(treeroot):
		goodfiles = fnmatch.filter(dirs + files, pattern)
		results.extend(os.path.join(base, f) for f in goodfiles)
	return results

class SetupTest(unittest.TestCase):

	def setUp(self):
		setup = os.path.join(os.path.dirname(__file__), '..', 'setup.py')
		self.setup = os.path.exists(setup) and setup or None
		if not self.setup and sys.version_info >= (2,7): # running not out of the source
			raise unittest.SkipTest(
				"Seems to be running not out of source distribution"
				" -- cannot locate setup.py")

	def testSetupInstallRoot(self):
		if not self.setup: return			  # if verbose skip didn't work out
		tmp = tempfile.mkdtemp()
		os.system("%s %s install --root=%s >/dev/null"
				  % (sys.executable, self.setup, tmp))

		def addpath(l):
			return [os.path.join(tmp, x) for x in l]

		def strippath(l):
			return [x[len(tmp)+1:] for x in l]

		got = strippath(sorted(glob('%s/*' % tmp)))
		need = ['etc', 'usr', 'var']

		# if anything is missing
		if set(need).difference(got):
			#  below code was actually to print out not missing but
			#  rather files in 'excess'.  Left in place in case we
			#  decide to revert to such more strict test
			files = {}
			for missing in set(got).difference(need):
				missing_full = os.path.join(tmp, missing)
				files[missing] = os.path.exists(missing_full) \
					and strippath(recursive_glob(missing_full, '*')) or None

			self.assertEqual(
				got, need,
				msg="Got: %s Needed: %s under %s. Files under new paths: %s"
				% (got, need, tmp, files))

		# Assure presence of some files we expect to see in the installation
		for f in ('etc/fail2ban/fail2ban.conf',
				  'etc/fail2ban/jail.conf'):
			self.assertTrue(os.path.exists(os.path.join(tmp, f)),
							msg="Can't find %s" % f)

		# clean up
		shutil.rmtree(tmp)

class TestsUtilsTest(unittest.TestCase):

	def testmbasename(self):
		self.assertEqual(mbasename("sample.py"), 'sample')
		self.assertEqual(mbasename("/long/path/sample.py"), 'sample')
		# this one would include only the directory for the __init__ and base files
		self.assertEqual(mbasename("/long/path/__init__.py"), 'path.__init__')
		self.assertEqual(mbasename("/long/path/base.py"), 'path.base')
		self.assertEqual(mbasename("/long/path/base"), 'path.base')

	def testTraceBack(self):
		# pretty much just a smoke test since tests runners swallow all the detail

		for compress in True, False:
			tb = TraceBack(compress=compress)

			def func_raise():
				raise ValueError()

			def deep_function(i):
				if i: deep_function(i-1)
				else: func_raise()

			try:
				print deep_function(3)
			except ValueError:
				s = tb()

			# if we run it through 'coverage' (e.g. on travis) then we
			# would get a traceback
			if 'coverage' in s:
				self.assertTrue('>' in s, msg="no '>' in %r" % s)
			else:
				self.assertFalse('>' in s, msg="'>' present in %r" % s)  # There is only "fail2ban-testcases" in this case, no true traceback
			self.assertTrue(':' in s, msg="no ':' in %r" % s)


	def testFormatterWithTraceBack(self):
		from StringIO import StringIO
		strout = StringIO()
		Formatter = FormatterWithTraceBack

		# and both types of traceback at once
		fmt = ' %(tb)s | %(tbc)s : %(message)s'
		logSys = logging.getLogger("fail2ban_tests")
		out = logging.StreamHandler(strout)
		out.setFormatter(Formatter(fmt))
		logSys.addHandler(out)
		logSys.error("XXX")

		s = strout.getvalue()
		self.assertTrue(s.rstrip().endswith(': XXX'))
		pindex = s.index('|')

		# in this case compressed and not should be the same (?)
		self.assertTrue(pindex > 10)	  # we should have some traceback
		self.assertEqual(s[:pindex], s[pindex+1:pindex*2 + 1])