import os

from django.core.management.base import copy_helper, CommandError, LabelCommand

from django.utils.importlib import import_module

class Command(LabelCommand):

    help = "Creates a Django app directory structure for the given app name in the current directory."

    args = "[appname]"

    label = 'application name'

    requires_model_validation = False

    # Can't import settings during this command, because they haven't

    # necessarily been created.

    can_import_settings = False

    def handle_label(self, app_name, directory=None, **options):

        if directory is None:

            directory = os.getcwd()

        # Determine the project_name by using the basename of directory,

        # which should be the full path of the project directory (or the

        # current directory if no directory was passed).

        project_name = os.path.basename(directory)

        if app_name == project_name:

            raise CommandError("You cannot create an app with the same name"

                               " (%r) as your project." % app_name)

        # Check that the app_name cannot be imported.

        try:

            import_module(app_name)

        except ImportError:

            pass

        else:

            raise CommandError("%r conflicts with the name of an existing Python module and cannot be used as an app name. Please try another name." % app_name)

        copy_helper(self.style, 'app', app_name, directory, project_name)

class ProjectCommand(Command):

    help = ("Creates a Django app directory structure for the given app name"

            " in this project's directory.")

    def __init__(self, project_directory):

        super(ProjectCommand, self).__init__()

        self.project_directory = project_directory

    def handle_label(self, app_name, **options):

        super(ProjectCommand, self).handle_label(app_name, self.project_directory, **options)