# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2013 Mirantis Inc.
# All Rights Reserved.
#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import os
import tempfile

from cloudbaseinit.openstack.common import log as logging
from cloudbaseinit.osutils import factory as osutils_factory

LOG = logging.getLogger("cloudbaseinit")


def get_plugin(parent_set):
    return ShellScriptHandler(parent_set)


class ShellScriptHandler:
    def __init__(self, parent_set):
        LOG.info("Shell-script part handler is loaded.")
        self.type = "text/x-shellscript"
        self.name = "Shell-script userdata plugin"

    def process(self, part):
        osutils = osutils_factory.OSUtilsFactory().get_os_utils()

        file_name = part.get_filename()
        target_path = os.path.join(tempfile.gettempdir(), file_name)

        if file_name.endswith(".cmd"):
            args = [target_path]
            shell = True
        elif file_name.endswith(".sh"):
            args = ['bash.exe', target_path]
            shell = False
        elif file_name.endswith(".ps1"):
            args = ['powershell.exe', '-ExecutionPolicy', 'RemoteSigned',
                    '-NonInteractive', target_path]
            shell = False
        else:
            # Unsupported
            LOG.warning('Unsupported shell format')
            return False

        try:
            with open(target_path, 'wb') as f:
                f.write(part.get_payload())
            (out, err, ret_val) = osutils.execute_process(args, shell)

            LOG.info('User_data script ended with return code: %d' % ret_val)
            LOG.debug('User_data stdout:\n%s' % out)
            LOG.debug('User_data stderr:\n%s' % err)
        except Exception, ex:
            LOG.warning('An error occurred during user_data execution: \'%s\''
                        % ex)
        finally:
            if os.path.exists(target_path):
                os.remove(target_path)

        return False