import os
from glob import glob, escape
from contextlib import contextmanager

from gplaycli.gplaycli import GPlaycli

class BadPackageNameException(Exception):
    pass

class dotdict(dict):
    """dot.notation access to dictionary attributes"""
    __getattr__ = dict.get
    __setattr__ = dict.__setitem__
    __delattr__ = dict.__delitem__

class APK:
    def __init__(self, apk, conf={}, conf_file=None):
        self.conf = conf
        self.conf_file = conf_file
        if 'play.google.com/store/apps/details?id=' in apk:
            self.package_name = apk.split('play.google.com/store/apps/details?id=')[1]
        else:
            self.package_name = apk

    def download(self):
        cli = GPlaycli(args=dotdict(self.conf), config_file=self.conf_file)
        cli.download_folder = 'out'
        d = cli.download([self.package_name])  # returns the number of downloaded packages
        if len(d) == 0:
            raise BadPackageNameException(f'error downloading {self.package_name}')

        fname = os.path.join('out', self.package_name + '.apk')
        if os.path.isfile(fname):
            self.file_name = fname

    def check_dimension(self):
        if os.path.getsize(self.file_name) > 50 * 1024 * 1023:
            os.system('split -b 49M "{0}" "{1}"'.format(self.file_name, self.file_name))
            os.remove(self.file_name)
        return glob(escape(self.file_name) + '*')

    @contextmanager
    def send(self):
        files = self.check_dimension()  # split if size >= 50MB
        yield files
        for f in files:  # removing old files
            os.remove(f)