#! /usr/bin/env python3
"""
Sample for python PCSC wrapper module: Detect card insertion/removal

__author__ = "http://www.gemalto.com"

Copyright 2001-2012 gemalto
Author: Jean-Daniel Aussel, mailto:jean-daniel.aussel@gemalto.com
Copyright 2010 Ludovic Rousseau
Author: Ludovic Rousseau, mailto:ludovic.rousseau@free.fr

This file is part of pyscard.

pyscard is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

pyscard 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with pyscard; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
"""

from smartcard.scard import *
import smartcard.util

srTreeATR = \
    [0x3B, 0x77, 0x94, 0x00, 0x00, 0x82, 0x30, 0x00, 0x13, 0x6C, 0x9F, 0x22]
srTreeMask = \
    [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]


def printstate(state):
    reader, eventstate, atr = state
    print(reader + " " + smartcard.util.toHexString(atr, smartcard.util.HEX))
    if eventstate & SCARD_STATE_ATRMATCH:
        print('\tCard found')
    if eventstate & SCARD_STATE_UNAWARE:
        print('\tState unware')
    if eventstate & SCARD_STATE_IGNORE:
        print('\tIgnore reader')
    if eventstate & SCARD_STATE_UNAVAILABLE:
        print('\tReader unavailable')
    if eventstate & SCARD_STATE_EMPTY:
        print('\tReader empty')
    if eventstate & SCARD_STATE_PRESENT:
        print('\tCard present in reader')
    if eventstate & SCARD_STATE_EXCLUSIVE:
        print('\tCard allocated for exclusive use by another application')
    if eventstate & SCARD_STATE_INUSE:
        print('\tCard in used by another application but can be shared')
    if eventstate & SCARD_STATE_MUTE:
        print('\tCard is mute')
    if eventstate & SCARD_STATE_CHANGED:
        print('\tState changed')
    if eventstate & SCARD_STATE_UNKNOWN:
        print('\tState unknowned')


try:
    hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER)
    if hresult != SCARD_S_SUCCESS:
        raise error(
            'Failed to establish context: ' +
            SCardGetErrorMessage(hresult))
    print('Context established!')

    try:
        hresult, readers = SCardListReaders(hcontext, [])
        if hresult != SCARD_S_SUCCESS:
            raise error(
                'Failed to list readers: ' +
                SCardGetErrorMessage(hresult))
        print('PCSC Readers:', readers)

        readerstates = []
        for i in range(len(readers)):
            readerstates += [(readers[i], SCARD_STATE_UNAWARE)]

        print('----- Current reader and card states are: -------')
        hresult, newstates = SCardGetStatusChange(hcontext, 0, readerstates)
        for i in newstates:
            printstate(i)

        print('----- Please insert or remove a card ------------')
        hresult, newstates = SCardGetStatusChange(
                                hcontext,
                                INFINITE,
                                newstates)

        print('----- New reader and card states are: -----------')
        for i in newstates:
            printstate(i)

    finally:
        hresult = SCardReleaseContext(hcontext)
        if hresult != SCARD_S_SUCCESS:
            raise error(
                'Failed to release context: ' +
                SCardGetErrorMessage(hresult))
        print('Released context.')

    import sys
    if 'win32' == sys.platform:
        print('press Enter to continue')
        sys.stdin.read(1)

except error as e:
    print(e)
