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

# (c) 2013, bleader
# Written by bleader <bleader@ratonland.org>
# Based on pkgin module written by Shaun Zinck <shaun.zinck at gmail.com>
# that was based on pacman module written by Afterburn <http://github.com/afterburn> 
#  that was based on apt module written by Matthew Williams <matthew@flowroute.com>
#
# This module 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.
#
# This software 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 software.  If not, see <http://www.gnu.org/licenses/>.


DOCUMENTATION = '''
---
module: pkgng
short_description: Package manager for FreeBSD >= 9.0
description:
    - Manage binary packages for FreeBSD using 'pkgng' which
      is available in versions after 9.0.
version_added: "1.2"
options:
    name:
        description:
            - name of package to install/remove
        required: true
    state:
        description:
            - state of the package
        choices: [ 'present', 'absent' ]
        required: false
        default: present
    cached:
        description:
            - use local package base or try to fetch an updated one
        choices: [ 'yes', 'no' ]
        required: false
        default: no
    pkgsite:
        description:
            - for pkgng versions before 1.1.4, specify packagesite to use
              for downloading packages, if not specified, use settings from
              /usr/local/etc/pkg.conf
              for newer pkgng versions, specify a the name of a repository
              configured in /usr/local/etc/pkg/repos
        required: false
author: bleader
notes:
    - When using pkgsite, be careful that already in cache packages won't be downloaded again.
'''

EXAMPLES = '''
# Install package foo
- pkgng: name=foo state=present

# Remove packages foo and bar 
- pkgng: name=foo,bar state=absent
'''


import json
import shlex
import os
import re
import sys

def query_package(module, pkgng_path, name):

    rc, out, err = module.run_command("%s info -g -e %s" % (pkgng_path, name))

    if rc == 0:
        return True

    return False

def pkgng_older_than(module, pkgng_path, compare_version):

    rc, out, err = module.run_command("%s -v" % pkgng_path)
    version = map(lambda x: int(x), re.split(r'[\._]', out))

    i = 0
    new_pkgng = True
    while compare_version[i] == version[i]:
        i += 1
        if i == min(len(compare_version), len(version)):
            break
    else:
        if compare_version[i] > version[i]:
            new_pkgng = False
    return not new_pkgng


def remove_packages(module, pkgng_path, packages):
    
    remove_c = 0
    # Using a for loop incase of error, we can report the package that failed
    for package in packages:
        # Query the package first, to see if we even need to remove
        if not query_package(module, pkgng_path, package):
            continue

        if not module.check_mode:
            rc, out, err = module.run_command("%s delete -y %s" % (pkgng_path, package))

        if not module.check_mode and query_package(module, pkgng_path, package):
            module.fail_json(msg="failed to remove %s: %s" % (package, out))
    
        remove_c += 1

    if remove_c > 0:

        module.exit_json(changed=True, msg="removed %s package(s)" % remove_c)

    module.exit_json(changed=False, msg="package(s) already absent")


def install_packages(module, pkgng_path, packages, cached, pkgsite):

    install_c = 0

    # as of pkg-1.1.4, PACKAGESITE is deprecated in favor of repository definitions
    # in /usr/local/etc/pkg/repos
    old_pkgng = pkgng_older_than(module, pkgng_path, [1, 1, 4])

    if old_pkgng and (pkgsite != ""):
        pkgsite = "PACKAGESITE=%s" % (pkgsite)

    if not module.check_mode and cached == "no":
        if old_pkgng:
            rc, out, err = module.run_command("%s %s update" % (pkgsite, pkgng_path))
        else:
            rc, out, err = module.run_command("%s update" % (pkgng_path))
        if rc != 0:
            module.fail_json(msg="Could not update catalogue")

    for package in packages:
        if query_package(module, pkgng_path, package):
            continue

        if not module.check_mode:
            if old_pkgng:
                rc, out, err = module.run_command("%s %s install -g -U -y %s" % (pkgsite, pkgng_path, package))
            else:
                rc, out, err = module.run_command("%s install -r %s -g -U -y %s" % (pkgng_path, pkgsite, package))

        if not module.check_mode and not query_package(module, pkgng_path, package):
            module.fail_json(msg="failed to install %s: %s" % (package, out), stderr=err)

        install_c += 1
    
    if install_c > 0:
        module.exit_json(changed=True, msg="present %s package(s)" % (install_c))

    module.exit_json(changed=False, msg="package(s) already present")


def main():
    module = AnsibleModule(
            argument_spec       = dict(
                state           = dict(default="present", choices=["present","absent"]),
                name            = dict(aliases=["pkg"], required=True),
                cached          = dict(default=False, type='bool'),
                pkgsite         = dict(default="", required=False)),
            supports_check_mode = True)

    pkgng_path = module.get_bin_path('pkg', True)

    p = module.params

    pkgs = p["name"].split(",")

    if p["state"] == "present":
        install_packages(module, pkgng_path, pkgs, p["cached"], p["pkgsite"])

    elif p["state"] == "absent":
        remove_packages(module, pkgng_path, pkgs)

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