"""
    urlresolver XBMC Addon
    Copyright (C) 2013 Bstrdsmkr

    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/>.

    Adapted for use in xbmc from:
    https://github.com/einars/js-beautify/blob/master/python/jsbeautifier/unpackers/packer.py
    
    usage:

    if detect(some_string):
        unpacked = unpack(some_string)


Unpacker for Dean Edward's p.a.c.k.e.r
"""

import re
import string

def detect(source):
    """Detects whether `source` is P.A.C.K.E.R. coded."""
    source = source.replace(' ','')
    if re.search('eval(function(p,a,c,k,e,(?:r|d)',source): return True
    else: return False

def unpack(source):
    """Unpacks P.A.C.K.E.R. packed js code."""
    payload, symtab, radix, count = _filterargs(source)

    if count != len(symtab):
        raise UnpackingError('Malformed p.a.c.k.e.r. symtab.')

    try:
        unbase = Unbaser(radix)
    except TypeError:
        raise UnpackingError('Unknown p.a.c.k.e.r. encoding.')

    def lookup(match):
        """Look up symbols in the synthetic symtab."""
        word  = match.group(0)
        return symtab[unbase(word)] or word

    source = re.sub(r'\b\w+\b', lookup, payload)
    return _replacestrings(source)

def _filterargs(source):
    """Juice from a source file the four args needed by decoder."""
    argsregex = (r"}\('(.*)', *(\d+), *(\d+), *'(.*?)'\.split\('\|'\)")
    args = re.search(argsregex, source, re.DOTALL).groups()

    try:
        return args[0], args[3].split('|'), int(args[1]), int(args[2])
    except ValueError:
        raise UnpackingError('Corrupted p.a.c.k.e.r. data.')

def _replacestrings(source):
    """Strip string lookup table (list) and replace values in source."""
    match = re.search(r'var *(_\w+)\=\["(.*?)"\];', source, re.DOTALL)

    if match:
        varname, strings = match.groups()
        startpoint = len(match.group(0))
        lookup = strings.split('","')
        variable = '%s[%%d]' % varname
        for index, value in enumerate(lookup):
            source = source.replace(variable % index, '"%s"' % value)
        return source[startpoint:]
    return source


class Unbaser(object):
    """Functor for a given base. Will efficiently convert
    strings to natural numbers."""
    ALPHABET  = {
        62 : '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',
        95 : (' !"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ'
              '[\]^_`abcdefghijklmnopqrstuvwxyz{|}~')
    }

    def __init__(self, base):
        self.base = base

        # If base can be handled by int() builtin, let it do it for us
        if 2 <= base <= 36:
            self.unbase = lambda string: int(string, base)
        else:
            # Build conversion dictionary cache
            try:
                self.dictionary = dict((cipher, index) for
                    index, cipher in enumerate(self.ALPHABET[base]))
            except KeyError:
                raise TypeError('Unsupported base encoding.')

            self.unbase = self._dictunbaser

    def __call__(self, string):
        return self.unbase(string)

    def _dictunbaser(self, string):
        """Decodes a  value to an integer."""
        ret = 0
        for index, cipher in enumerate(string[::-1]):
            ret += (self.base ** index) * self.dictionary[cipher]
        return ret

class UnpackingError(Exception):
    """Badly packed source or general error. Argument is a
    meaningful description."""
    pass


if __name__ == "__main__":
    test='''eval(function(p,a,c,k,e,d){while(c--)if(k[c])p=p.replace(new RegExp('\\b'+c.toString(a)+'\\b','g'),k[c]);return p}('4(\'30\').2z({2y:\'5://a.8.7/i/z/y/w.2x\',2w:{b:\'2v\',19:\'<p><u><2 d="20" c="#17">2u 19.</2></u><16/><u><2 d="18" c="#15">2t 2s 2r 2q.</2></u></p>\',2p:\'<p><u><2 d="20" c="#17">2o 2n b.</2></u><16/><u><2 d="18" c="#15">2m 2l 2k 2j.</2></u></p>\',},2i:\'2h\',2g:[{14:"11",b:"5://a.8.7/2f/13.12"},{14:"2e",b:"5://a.8.7/2d/13.12"},],2c:"11",2b:[{10:\'2a\',29:\'5://v.8.7/t-m/m.28\'},{10:\'27\'}],26:{\'25-3\':{\'24\':{\'23\':22,\'21\':\'5://a.8.7/i/z/y/\',\'1z\':\'w\',\'1y\':\'1x\'}}},s:\'5://v.8.7/t-m/s/1w.1v\',1u:"1t",1s:"1r",1q:\'1p\',1o:"1n",1m:"1l",1k:\'5\',1j:\'o\',});l e;l k=0;l 6=0;4().1i(9(x){f(6>0)k+=x.r-6;6=x.r;f(q!=0&&k>=q){6=-1;4().1h();4().1g(o);$(\'#1f\').j();$(\'h.g\').j()}});4().1e(9(x){6=-1});4().1d(9(x){n(x)});4().1c(9(){$(\'h.g\').j()});9 n(x){$(\'h.g\').1b();f(e)1a;e=1;}',36,109,'||font||jwplayer|http|p0102895|me|vidto|function|edge3|file|color|size|vvplay|if|video_ad|div||show|tt102895|var|player|doPlay|false||21600|position|skin|test||static|1y7okrqkv4ji||00020|01|type|360p|mp4|video|label|FFFFFF|br|FF0000||deleted|return|hide|onComplete|onPlay|onSeek|play_limit_box|setFullscreen|stop|onTime|dock|provider|391|height|650|width|over|controlbar|5110|duration|uniform|stretching|zip|stormtrooper|213|frequency|prefix||path|true|enabled|preview|timeslidertooltipplugin|plugins|html5|swf|src|flash|modes|hd_default|3bjhohfxpiqwws4phvqtsnolxocychumk274dsnkblz6sfgq6uz6zt77gxia|240p|3bjhohfxpiqwws4phvqtsnolxocychumk274dsnkba36sfgq6uzy3tv2oidq|hd|original|ratio|broken|is|link|Your|such|No|nofile|more|any|availabe|Not|File|OK|previw|jpg|image|setup|flvplayer'.split('|')))'''
    print unpack(test)
