# Copyright (c) 2015 SUSE Linux GmbH.  All rights reserved.
#
# This file is part of kiwi.
#
# kiwi 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.
#
# kiwi 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 kiwi.  If not, see <http://www.gnu.org/licenses/>
#
"""
usage: kiwi system create -h | --help
       kiwi system create --root=<directory> --target-dir=<directory>
       kiwi system create help

commands:
    create
        create a system image from the specified root directory
        the root directory is the result of a system prepare
        command
    create help
        show manual page for create command

options:
    --root=<directory>
        the path to the root directory, usually the result of
        a former system prepare call
    --target-dir=<directory>
        the target directory to store the system image file(s)
"""
import os

# project
from .cli_task import CliTask
from .help import Help
from .builder import ImageBuilder
from .system_setup import SystemSetup
from .privileges import Privileges
from .path import Path
from .logger import log


class SystemCreateTask(CliTask):
    """
        Implements creation of system images
    """
    def process(self):
        self.manual = Help()
        if self.__help():
            return

        Privileges.check_for_root_permissions()

        self.load_xml_description(
            self.command_args['--root']
        )

        log.info('Creating system image')
        if not os.path.exists(self.command_args['--target-dir']):
            Path.create(self.command_args['--target-dir'])

        setup = SystemSetup(
            xml_state=self.xml_state,
            description_dir=self.command_args['--root'],
            root_dir=self.command_args['--root']
        )
        setup.call_image_script()

        image_builder = ImageBuilder(
            self.xml_state,
            self.command_args['--target-dir'],
            self.command_args['--root']
        )
        result = image_builder.create()
        result.print_results()
        result.dump(
            self.command_args['--target-dir'] + '/kiwi.result'
        )

    def __help(self):
        if self.command_args['help']:
            self.manual.show('kiwi::system::create')
        else:
            return False
        return self.manual