#! /usr/bin/env python3

#   SCardCancel.py : Unitary test for SCardCancel()
#   Copyright (C) 2008-2009  Ludovic Rousseau
#
#   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/>.

"""
Test SCardCancel (from another thread)
"""

import threading
import time

from smartcard.pcsc.PCSCExceptions import (
    BaseSCardException,
    EstablishContextException,
    ListReadersException,
    ReleaseContextException,
)
from smartcard.scard import (
    SCARD_E_CANCELLED,
    SCARD_E_TIMEOUT,
    SCARD_S_SUCCESS,
    SCARD_SCOPE_USER,
    SCARD_STATE_UNAWARE,
    SCardCancel,
    SCardEstablishContext,
    SCardGetErrorMessage,
    SCardGetStatusChange,
    SCardListReaders,
    SCardReleaseContext,
)


def cancel(hcontext):
    """Cancel"""
    time.sleep(1)
    print("cancel")
    hresult = SCardCancel(hcontext)
    if hresult != 0:
        print("Failed to SCardCancel: " + SCardGetErrorMessage(hresult))


def main():
    """main"""
    hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER)
    if hresult != SCARD_S_SUCCESS:
        raise EstablishContextException(hresult)

    hresult, readers = SCardListReaders(hcontext, [])
    if hresult != SCARD_S_SUCCESS:
        raise ListReadersException(hresult)
    print("PC/SC Readers:", readers)

    readerstates = {}
    for reader in readers:
        readerstates[reader] = (reader, SCARD_STATE_UNAWARE)
    hresult, newstates = SCardGetStatusChange(hcontext, 0, list(readerstates.values()))
    if hresult != SCARD_S_SUCCESS:
        raise BaseSCardException(hresult)
    print(newstates)
    for state in newstates:
        readername, eventstate, _atr = state
        readerstates[readername] = (readername, eventstate)

    t = threading.Thread(target=cancel, args=(hcontext,))
    t.start()

    hresult, newstates = SCardGetStatusChange(
        hcontext, 10000, list(readerstates.values())
    )
    print("SCardGetStatusChange()", SCardGetErrorMessage(hresult))
    if hresult not in (SCARD_S_SUCCESS, SCARD_E_TIMEOUT):
        if SCARD_E_CANCELLED == hresult:
            pass
        else:
            raise BaseSCardException(hresult)

    hresult = SCardReleaseContext(hcontext)
    print("SCardReleaseContext()", SCardGetErrorMessage(hresult))
    if hresult != SCARD_S_SUCCESS:
        raise ReleaseContextException(hresult)


if __name__ == "__main__":
    main()
