#!/usr/bin/python
# -*- coding: utf-8 -*-

# (c) 2013, Alexander Winkler <mail () winkler-alexander.de>
# based on svr4pkg by
#  Boyd Adamson <boyd () boydadamson.com> (2012)
#
# 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: pkgutil 
short_description: Manage CSW-Packages on Solaris
description:
    - Manages CSW packages (SVR4 format) on Solaris 10 and 11.
    - These were the native packages on Solaris <= 10 and are available
      as a legacy feature in Solaris 11.
    - Pkgutil is an advanced packaging system, which resolves dependency on installation.
      It is designed for CSW packages.
version_added: "1.3"
author: "Alexander Winkler (@dermute)"
options:
  name:
    description:
      - Package name, e.g. (C(CSWnrpe))
    required: true
  site:
    description:
      - Specifies the repository path to install the package from.
      - Its global definition is done in C(/etc/opt/csw/pkgutil.conf).
  state:
    description:
      - Whether to install (C(present)), or remove (C(absent)) a package.
      - The upgrade (C(latest)) operation will update/install the package to the latest version available.
      - "Note: The module has a limitation that (C(latest)) only works for one package, not lists of them."
    required: true
    choices: ["present", "absent", "latest"]
'''

EXAMPLES = '''
# Install a package
pkgutil: name=CSWcommon state=present

# Install a package from a specific repository
pkgutil: name=CSWnrpe site='ftp://myinternal.repo/opencsw/kiel state=latest'
'''

import os
import pipes

def package_installed(module, name):
    cmd = ['pkginfo']
    cmd.append('-q')
    cmd.append(name)
    rc, out, err = run_command(module, cmd)
    if rc == 0:
        return True
    else:
        return False

def package_latest(module, name, site):
    # Only supports one package
    cmd = [ 'pkgutil', '--single', '-c' ]
    if site is not None:
        cmd += [ '-t', site]
    cmd.append(name)
    rc, out, err = run_command(module, cmd)
    # replace | tail -1 |grep -v SAME
    # use -2, because splitting on \n create a empty line
    # at the end of the list
    return 'SAME' in out.split('\n')[-2]

def run_command(module, cmd, **kwargs):
    progname = cmd[0]
    cmd[0] = module.get_bin_path(progname, True, ['/opt/csw/bin'])
    return module.run_command(cmd, **kwargs)

def package_install(module, state, name, site):
    cmd = [ 'pkgutil', '-iy' ]
    if site is not None:
        cmd += [ '-t', site ]
    if state == 'latest':
        cmd += [ '-f' ] 
    cmd.append(name)
    (rc, out, err) = run_command(module, cmd)
    return (rc, out, err)

def package_upgrade(module, name, site):
    cmd = [ 'pkgutil', '-ufy' ]
    if site is not None:
        cmd += [ '-t', site ]
    cmd.append(name)
    (rc, out, err) = run_command(module, cmd)
    return (rc, out, err)

def package_uninstall(module, name):
    cmd = [ 'pkgutil', '-ry', name]
    (rc, out, err) = run_command(module, cmd)
    return (rc, out, err)

def main():
    module = AnsibleModule(
        argument_spec = dict(
            name = dict(required = True),
            state = dict(required = True, choices=['present', 'absent','latest']),
            site = dict(default = None),
        ),
        supports_check_mode=True
    )
    name = module.params['name']
    state = module.params['state']
    site = module.params['site']
    rc = None
    out = ''
    err = ''
    result = {}
    result['name'] = name
    result['state'] = state

    if state == 'present':
        if not package_installed(module, name):
            if module.check_mode:
                module.exit_json(changed=True)
            (rc, out, err) = package_install(module, state, name, site)
            # Stdout is normally empty but for some packages can be
            # very long and is not often useful
            if len(out) > 75:
                out = out[:75] + '...'

    elif state == 'latest':
        if not package_installed(module, name):
            if module.check_mode:
                module.exit_json(changed=True)
            (rc, out, err) = package_install(module, state, name, site)
        else:
            if not package_latest(module, name, site):
                if module.check_mode:
                    module.exit_json(changed=True) 
                (rc, out, err) = package_upgrade(module, name, site)
                if len(out) > 75:
                    out = out[:75] + '...'

    elif state == 'absent':
        if package_installed(module, name):
            if module.check_mode:
                module.exit_json(changed=True)
            (rc, out, err) = package_uninstall(module, name)
            out = out[:75]

    if rc is None:
        # pkgutil was not executed because the package was already present/absent
        result['changed'] = False
    elif rc == 0:
        result['changed'] = True
    else:
        result['changed'] = False
        result['failed'] = True

    if out:
        result['stdout'] = out
    if err:
        result['stderr'] = err

    module.exit_json(**result)

# import module snippets
from ansible.module_utils.basic import *
main()