# -*- coding: utf-8 -*-

try:
	import univention.ucslint.base as uub
except ImportError:
	import ucslint.base as uub
import os
import re

class UniventionPackageCheck(uub.UniventionPackageCheckDebian):
	def __init__(self):
		super(UniventionPackageCheck, self).__init__()
		self.name = '9017-Use-internal-libraries'

	def getMsgIds(self):
		return { '9017-1': [ uub.RESULT_WARN, 'cannot open file' ],
				 '9017-2': [ uub.RESULT_WARN, 'found well-known LDAP object but no custom_groupname' ],
				 }

	def postinit(self, path):
		""" checks to be run before real check or to create precalculated data for several runs. Only called once! """
		pass

	def check(self, path):
		""" the real check """
		super(UniventionPackageCheck, self).check(path)

		for fn in uub.FilteredDirWalkGenerator(path):
			# skip all files larger than 30kiB
			try:
				extension = fn.rsplit('.',1)[-1]
				# skip images, python binaries
				if extension in ('svg', 'png', 'jpg', 'gif', 'pyc'):
					continue
				# check only small files but all js/py/sh files
				if os.stat(fn).st_size > 50*1024 and extension not in ('js', 'py', 'sh', ):
					continue
				content = open(fn, 'r').read()
			except (IOError, OSError):
				self.addmsg( '9017-1', 'failed to open and read file', fn )
				continue

			for txt in ['Domain Users', 'Domain Admins', 'Administrator', 'Windows Hosts']:
				regex = '(?!custom_groupname)[^\n]+%s' % (txt,)
				for (line, pos) in self._regexSearchString(content, regex, re.I | re.M):
					self.addmsg('9017-2', 'line contains "%s" without custom_groupname() call' % txt, fn, line, pos)

	def _regexSearchString(self, content, regex, regex_flags=0):
		pattern = re.compile(regex, regex_flags)
		result = []
		pos = 0
		while True:
			match = pattern.search(content, pos)
			if not match:
				break
			else:
				line = content.count('\n', 0, match.start()) + 1
				linepos = match.start() - content.rfind('\n', 0, match.start())
				pos = match.end() - 1
				result.append( (line, linepos) )
		return result

	def _searchString(self, content, txt):
		result = []
		pos = 0
		while True:
			fpos = content.lower().find( txt.lower(), pos )
			if fpos < 0:
				break
			else:
				line = content.count('\n', 0, fpos) + 1
				linepos = fpos - content.rfind('\n', 0, fpos)
				pos = fpos + len(txt) - 1
				result.append( (line, linepos) )
		return result