import sys

import io

import regex

import enchant

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

class EofReached (Exception):

    pass

class GadictSpellChecker:

    SEPARATOR_RE = regex.compile(u"^__$")

    EMPTY_RE = regex.compile( u"^$" )

    HEADWORD_ATTR_RE = regex.compile( u"^ " )

    def _add_checker(self, lang):

        try:

            self.dicts.append(enchant.Dict(lang))

        except enchant.errors.DictNotFoundError:

            print("Dictionary '{:s}' is not found...".format(lang))

    def __init__(self, stream, fname):

        self.stream = stream

        self.fname = fname

        self.lineno = 0

        self.dicts = []

        self._add_checker('en_US')

        self._add_checker('en_GB')

        # self._add_checker('en_AU')

        # self._add_checker('en_CA')

    def _readline(self):

        line = self.stream.readline()

        if len(line) == 0:

            raise EofReached

        self.lineno += 1

        return line

    def _check(self):

        while True:

            line = self._readline()

            m = self.SEPARATOR_RE.match(line)

            if not m:

                continue

            line = self._readline()

            m = self.EMPTY_RE.match(line)

            if not m:

                raise Exception("Line {:d}: '{:s}' is not empty line\n".format(self.lineno, line))

            while True:

                line = self._readline()

                m = self.EMPTY_RE.match(line)

                if m:

                    break

                m = self.HEADWORD_ATTR_RE.match(line)

                if m:

                    continue

                line = line.strip()

                for word in regex.split("[ ,]+", line):

                    if any([dic.check(word) for dic in self.dicts]):

                        continue

                    print("""{:s}:{:d}: "{:s}" is misspelled""".format(self.fname, self.lineno, word))

    def check(self):

        try:

            self._check()

        except EofReached:

            pass

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

if len(sys.argv) < 2:

    raise Exception("Please, supply path to file...")

if len(sys.argv) > 2:

    raise Exception("Only one argument is necessary...")

FINAME = sys.argv[1]

with io.open(FINAME, mode='r', buffering=1, encoding="utf-8") as FIN:

    checker = GadictSpellChecker(FIN, FINAME)

    checker.check()