# Copyright (C) 2009, 2010  Roman Zimbelmann <romanz@lavabit.com>
#
# This program 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 3 of the License, or
# (at your option) any later version.
#
# This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

import sys
from os.path import realpath, join, dirname

from ranger import fsobject
from ranger.fsobject.file import File
from ranger.fsobject.directory import Directory
from ranger.shared.settings import SettingsAware

SettingsAware._setup()

TESTDIR = realpath(join(dirname(__file__), 'testdir'))
TESTFILE = join(TESTDIR, 'testfile5234148')
NONEXISTANT_DIR = join(TESTDIR, 'nonexistant')

import unittest
class Test1(unittest.TestCase):
	def test_initial_condition(self):
		# Check for the expected initial condition
		dir = Directory(TESTDIR)

		self.assertEqual(dir.path, TESTDIR)
		self.assertFalse(dir.content_loaded)
		self.assertEqual(dir.filenames, None)
		self.assertEqual(dir.files, None)
		if not sys.flags.optimize:  # asserts are ignored with python -O
			self.assertRaises(AssertionError, len, dir)

	def test_after_content_loaded(self):
		import os
		# Check whether the directory has the correct list of filenames.
		dir = Directory(TESTDIR)
		dir.load_content()

		self.assertTrue(dir.exists)
		self.assertEqual(type(dir.filenames), list)

		# Get the filenames you expect it to have and sort both before
		# comparing. I don't expect any order after only loading the filenames.
		assumed_filenames = os.listdir(TESTDIR)
		assumed_filenames = list(map(lambda str: os.path.join(TESTDIR, str),
			assumed_filenames))
		assumed_filenames.sort()
		dir.filenames.sort()

		self.assertTrue(len(dir) > 0)
		self.assertEqual(dir.filenames, assumed_filenames)

		# build a file object for each file in the list assumed_filenames
		# and find exactly one equivalent in dir.files
		for name in assumed_filenames:
			f = File(name)
			f.load()
			for dirfile in dir.files:
				if (f.path == dirfile.path and f.stat == dirfile.stat):
					break
			else:
				self.fail("couldn't find file {0}".format(name))

	def test_nonexistant_dir(self):
		dir = Directory(NONEXISTANT_DIR)
		dir.load_content()
		
		self.assertTrue(dir.content_loaded)
		self.assertFalse(dir.exists)
		self.assertFalse(dir.accessible)
		self.assertEqual(dir.filenames, None)
		if not sys.flags.optimize:  # asserts are ignored with python -O
			self.assertRaises(AssertionError, len, dir)

	def test_load_if_outdated(self):
		import os
		import time
		# modify the directory. If the time between the last modification
		# was within the filesystems resolution of mtime, we should have a reload

		def modify_dir():
			open(TESTFILE, 'w').close()
			os.unlink(TESTFILE)

		def mtime():
			return os.stat(TESTDIR).st_mtime

		dir = Directory(TESTDIR)
		dir.load()

		# If the modification happens to be in the same second as the
		# last modification, it will result in mtime having the same
		# integer value. So we wait until the resolution is exceeded
		# and mtime differs.
		old_mtime = mtime()
		for i in range(50):
			modify_dir()
			if old_mtime != mtime(): break
			time.sleep(0.1)
		else:
			# fail after 5 seconds of trying
			self.fail(
					"Cannot perform test: mtime of TESTDIR is not being updated.")

		self.assertTrue(dir.load_if_outdated())

if __name__ == '__main__':
	unittest.main()