#!/usr/bin/python
# encoding: utf-8

# (c) 2013, Matthias Vogelgesang <matthias.vogelgesang@gmail.com>
#
# This file is part of Ansible
#
# Ansible 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.
#
# Ansible 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 Ansible.  If not, see <http://www.gnu.org/licenses/>.


DOCUMENTATION = '''
---
module: zypper_repository
author: Matthias Vogelgesang
version_added: "1.4"
short_description: Add and remove Zypper repositories
description:
    - Add or remove Zypper repositories on SUSE and openSUSE
options:
    name:
        required: true
        default: none
        description:
            - A name for the repository.
    repo:
        required: true
        default: none
        description:
            - URI of the repository or .repo file.
    state:
        required: false
        choices: [ "absent", "present" ]
        default: "present"
        description:
            - A source string state.
    description:
        required: false
        default: none
        description:
            - A description of the repository
    disable_gpg_check:
        description:
          - Whether to disable GPG signature checking of
            all packages. Has an effect only if state is
            I(present).
        required: false
        default: "no"
        choices: [ "yes", "no" ]
        aliases: []
notes: []
requirements: [ zypper ]
'''

EXAMPLES = '''
# Add NVIDIA repository for graphics drivers
- zypper_repository: name=nvidia-repo repo='ftp://download.nvidia.com/opensuse/12.2' state=present

# Remove NVIDIA repository
- zypper_repository: name=nvidia-repo repo='ftp://download.nvidia.com/opensuse/12.2' state=absent
'''


def repo_exists(module, repo):
    """Return (rc, stdout, stderr, found) tuple"""
    cmd = ['/usr/bin/zypper', 'lr', '--uri']

    rc, stdout, stderr = module.run_command(cmd, check_rc=False)
    return (rc, stdout, stderr, repo in stdout)


def add_repo(module, repo, alias, description, disable_gpg_check):
    cmd = ['/usr/bin/zypper', 'ar', '--check', '--refresh']

    if description:
        cmd.extend(['--name', description])

    if disable_gpg_check:
        cmd.append('--no-gpgcheck')

    cmd.append(repo)

    if not repo.endswith('.repo'):
        cmd.append(alias)

    rc, stdout, stderr = module.run_command(cmd, check_rc=False)
    changed = rc == 0
    return (rc, stdout, stderr, changed)


def remove_repo(module, repo):
    cmd = ['/usr/bin/zypper', 'rr', repo]

    rc, stdout, stderr = module.run_command(cmd, check_rc=False)
    changed = rc == 0
    return (rc, stdout, stderr, changed)


def fail_if_rc_is_null(module, rc, stdout, stderr):
    if rc != 0:
        module.fail_json(msg=stderr if stderr else stdout)


def main():
    module = AnsibleModule(
        argument_spec=dict(
            name=dict(required=True),
            repo=dict(required=True),
            state=dict(choices=['present', 'absent'], default='present'),
            description=dict(required=False),
            disable_gpg_check = dict(required=False, default='no', type='bool'),
        ),
        supports_check_mode=False,
    )

    repo = module.params['repo']
    state = module.params['state']
    name = module.params['name']
    description = module.params['description']
    disable_gpg_check = module.params['disable_gpg_check']

    def exit_unchanged():
        module.exit_json(changed=False, repo=repo, state=state, name=name)

    rc, stdout, stderr, exists = repo_exists(module, repo)
    fail_if_rc_is_null(module, rc, stdout, stderr)

    if state == 'present':
        if exists:
            exit_unchanged()

        result = add_repo(module, repo, name, description, disable_gpg_check)
    elif state == 'absent':
        if not exists:
            exit_unchanged()

        result = remove_repo(module, repo)

    rc, stdout, stderr, changed = result
    fail_if_rc_is_null(module, rc, stdout, stderr)

    module.exit_json(changed=changed, repo=repo, state=state)

# import module snippets
from ansible.module_utils.basic import *

main()
