from ctypes import *

from functools import partial

import sys

_libchewing = None

if sys.platform == "win32": # Windows

    import os.path

    # find in current dir first

    dll_path = os.path.join(os.path.dirname(__file__), "chewing.dll")

    if not os.path.exists(dll_path):

        dll_path = "chewing.dll" # search in system path

    _libchewing = CDLL(dll_path)

else: # UNIX-like systems

    _libchewing = CDLL('libchewing.so.3')

_libchewing.chewing_commit_String.restype = c_char_p

_libchewing.chewing_buffer_String.restype = c_char_p

_libchewing.chewing_cand_String.restype = c_char_p

_libchewing.chewing_zuin_String.restype = c_char_p

_libchewing.chewing_aux_String.restype = c_char_p

_libchewing.chewing_get_KBString.restype = c_char_p

def Init(datadir, userdir):

    return _libchewing.chewing_Init(datadir, userdir)

class ChewingContext:

    def __init__(self, **kwargs):

        if not kwargs:

            self.ctx = _libchewing.chewing_new()

        else:

            syspath = kwargs.get("syspath", None)

            userpath = kwargs.get("userpath", None)

            self.ctx = _libchewing.chewing_new2(

                syspath,

                userpath,

                None,

                None)

    def __del__(self):

        _libchewing.chewing_delete(self.ctx)

    def __getattr__(self, name):

        func = 'chewing_' + name

        if hasattr(_libchewing, func):

            wrap = partial(getattr(_libchewing, func), self.ctx)

            setattr(self, name, wrap)

            return wrap

        else:

            raise AttributeError(name)

    def Configure(self, cpp, maxlen, direction, space, kbtype):

        self.set_candPerPage(cpp)

        self.set_maxChiSymbolLen(maxlen)

        self.set_addPhraseDirection(direction)

        self.set_spaceAsSelection(space)

        self.set_KBType(kbtype)