#!/usr/bin/env python

# This file is part of Androguard.
#
# Copyright (C) 2012, Anthony Desnos <desnos at t0t0.fr>
# All rights reserved.
#
# Androguard 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 3 of the License, or
# (at your option) any later version.
#
# Androguard 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 Androguard.  If not, see <http://www.gnu.org/licenses/>.

import sys

from optparse import OptionParser

from androguard.core.bytecodes import apk, dvm
from androguard.core.analysis import analysis
from androguard.core import androconf
from androguard.util import read

sys.path.append("./elsim")
from elsim import elsim
from elsim.elsim_dalvik import ProxyDalvik, FILTERS_DALVIK_SIM, ProxyDalvikMethod, FILTERS_DALVIK_BB
from elsim.elsim_dalvik import ProxyDalvikBasicBlock, FILTERS_DALVIK_DIFF_BB
from elsim.elsim_dalvik import DiffDalvikMethod

option_0 = {
    'name': ('-i', '--input'),
    'help': 'file : use these filenames',
    'nargs': 2
}
option_1 = {
    'name': ('-t', '--threshold'),
    'help': 'define the threshold',
    'nargs': 1
}
option_2 = {
    'name': ('-c', '--compressor'),
    'help': 'define the compressor',
    'nargs': 1
}
option_3 = {
    'name': ('-d', '--display'),
    'help': 'display the file in human readable format',
    'action': 'count'
}
#option_4 = { 'name' : ('-e', '--exclude'), 'help' : 'exclude specific blocks (0 : orig, 1 : diff, 2 : new)', 'nargs' : 1 }
option_5 = {
    'name': ('-e', '--exclude'),
    'help': 'exclude specific class name (python regexp)',
    'nargs': 1
}
option_6 = {
    'name': ('-s', '--size'),
    'help': 'exclude specific method below the specific size',
    'nargs': 1
}
option_7 = {
    'name': ('-v', '--version'),
    'help': 'version of the API',
    'action': 'count'
}

options = [option_0, option_1, option_2, option_3, option_5, option_6, option_7]


def main(options, arguments):
    details = False
    if options.display != None:
        details = True

    if options.input != None:
        ret_type = androconf.is_android(options.input[0])
        if ret_type == "APK":
            a = apk.APK(options.input[0])
            d1 = dvm.DalvikVMFormat(a.get_dex())
        elif ret_type == "DEX":
            d1 = dvm.DalvikVMFormat(read(options.input[0]))

        dx1 = analysis.VMAnalysis(d1)

        ret_type = androconf.is_android(options.input[1])
        if ret_type == "APK":
            a = apk.APK(options.input[1])
            d2 = dvm.DalvikVMFormat(a.get_dex())
        elif ret_type == "DEX":
            d2 = dvm.DalvikVMFormat(read(options.input[1]))

        dx2 = analysis.VMAnalysis(d2)

        print d1, dx1, d2, dx2
        sys.stdout.flush()

        threshold = None
        if options.threshold != None:
            threshold = float(options.threshold)

        FS = FILTERS_DALVIK_SIM
        FS[elsim.FILTER_SKIPPED_METH].set_regexp(options.exclude)
        FS[elsim.FILTER_SKIPPED_METH].set_size(options.size)
        el = elsim.Elsim(ProxyDalvik(d1, dx1), ProxyDalvik(d2, dx2), FS,
                         threshold, options.compressor)
        el.show()

        e1 = elsim.split_elements(el, el.get_similar_elements())
        for i in e1:
            j = e1[i]
            elb = elsim.Elsim(ProxyDalvikMethod(i), ProxyDalvikMethod(j),
                              FILTERS_DALVIK_BB, threshold, options.compressor)
            #elb.show()

            eld = elsim.Eldiff(ProxyDalvikBasicBlock(elb),
                               FILTERS_DALVIK_DIFF_BB)
            #eld.show()

            ddm = DiffDalvikMethod(i, j, elb, eld)
            ddm.show()

        print "NEW METHODS"
        enew = el.get_new_elements()
        for i in enew:
            el.show_element(i, False)

        print "DELETED METHODS"
        edel = el.get_deleted_elements()
        for i in edel:
            el.show_element(i)

    elif options.version != None:
        print "Androdiff version %s" % androconf.ANDROGUARD_VERSION


if __name__ == "__main__":
    parser = OptionParser()
    for option in options:
        param = option['name']
        del option['name']
        parser.add_option(*param, **option)

    options, arguments = parser.parse_args()
    sys.argv[:] = arguments
    main(options, arguments)
