#!/usr/bin/python
# Authors:
#     Endi S. Dewata <edewata@redhat.com>
#
# 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; version 2 of the License.
#
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Copyright (C) 2014 Red Hat, Inc.
# All rights reserved.
#

from __future__ import absolute_import
import os
import sys
import subprocess

import pki.server.upgrade


class ReplaceJettisonWithJackson(pki.server.upgrade.PKIServerUpgradeScriptlet):

    def __init__(self):
        super(ReplaceJettisonWithJackson, self).__init__()
        self.message = 'Replace Jettison with Jackson'

    def upgrade_instance(self, instance):

        # Tomcat common library
        common_lib = os.path.join(instance.base_dir, 'common', 'lib')

        # RESTEasy library
        resteasy_lib = subprocess.check_output(
            '. /usr/share/pki/etc/pki.conf && . /etc/pki/pki.conf && echo $RESTEASY_LIB',
            shell=True)
        resteasy_lib = resteasy_lib.decode(sys.getfilesystemencoding())
        # workaround for pylint error E1103
        resteasy_lib = resteasy_lib.strip()

        # remove old links
        link = os.path.join(common_lib, 'jettison.jar')
        self.remove_link(link)

        link = os.path.join(common_lib, 'resteasy-jettison-provider.jar')
        self.remove_link(link)

        # create new links
        source = os.path.join('/usr/share/java', 'jackson-annotations.jar')
        link = os.path.join(common_lib, 'jackson-annotations.jar')
        self.create_link(instance, source, link)

        source = os.path.join(
            '/usr/share/java/jackson',
            'jackson-core-asl.jar')
        link = os.path.join(common_lib, 'jackson-core-asl.jar')
        self.create_link(instance, source, link)

        source = os.path.join('/usr/share/java', 'jackson-core.jar')
        link = os.path.join(common_lib, 'jackson-core.jar')
        self.create_link(instance, source, link)

        source = os.path.join('/usr/share/java', 'jackson-databind.jar')
        link = os.path.join(common_lib, 'jackson-databind.jar')
        self.create_link(instance, source, link)

        source = os.path.join(
            '/usr/share/java/jackson-jaxrs-providers',
            'jackson-jaxrs-base.jar')
        link = os.path.join(common_lib, 'jackson-jaxrs-base.jar')
        self.create_link(instance, source, link)

        source = os.path.join('/usr/share/java/jackson', 'jackson-jaxrs.jar')
        link = os.path.join(common_lib, 'jackson-jaxrs.jar')
        self.create_link(instance, source, link)

        source = os.path.join(
            '/usr/share/java/jackson-jaxrs-providers',
            'jackson-jaxrs-json-provider.jar')
        link = os.path.join(common_lib, 'jackson-jaxrs-json-provider.jar')
        self.create_link(instance, source, link)

        source = os.path.join(
            '/usr/share/java/jackson',
            'jackson-mapper-asl.jar')
        link = os.path.join(common_lib, 'jackson-mapper-asl.jar')
        self.create_link(instance, source, link)

        source = os.path.join(
            '/usr/share/java',
            'jackson-module-jaxb-annotations.jar')
        link = os.path.join(common_lib, 'jackson-module-jaxb-annotations.jar')
        self.create_link(instance, source, link)

        source = os.path.join('/usr/share/java/jackson', 'jackson-mrbean.jar')
        link = os.path.join(common_lib, 'jackson-mrbean.jar')
        self.create_link(instance, source, link)

        source = os.path.join('/usr/share/java/jackson', 'jackson-smile.jar')
        link = os.path.join(common_lib, 'jackson-smile.jar')
        self.create_link(instance, source, link)

        source = os.path.join('/usr/share/java/jackson', 'jackson-xc.jar')
        link = os.path.join(common_lib, 'jackson-xc.jar')
        self.create_link(instance, source, link)

        source = os.path.join(resteasy_lib, 'resteasy-jackson-provider.jar')
        link = os.path.join(common_lib, 'resteasy-jackson-provider.jar')
        self.create_link(instance, source, link)

    def remove_link(self, link):

        self.backup(link)
        os.remove(link)

    def create_link(self, instance, source, link):

        self.backup(link)
        os.symlink(source, link)
        os.lchown(link, instance.uid, instance.gid)
