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

# (c) Bartłomiej Piotrowski <bpiotrowski@alpinelinux.org>
#
# 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: apk
short_description: Package manager for Alpine Linux
description:
    - Manages Alpine Linux packages (*.apk)
author: Bartłomiej Piotrowski

options:
    pkg:
        description:
            - A package name or package specifier with version
        required: true
        default: null

    state:
        description:
            - Indicates the desired package state
        required: false
        default: "no"
        choices: [ "absent", "latest", "present" , "purge" ]

    update:
        description:
            - Update the package database before the operation
        required: false
        default: "no"
        choices: [ "yes", "no" ]

    force:
        description:
            - Do what was asked even if it looks dangerous
        required: false
        default: "no"
        choices: [ "yes", "no" ]

notes: []
examples:
    - code: "apk: pkg=foo"
      description: Install package foo
    - code: "apk: pkg=foo state=purge"
      description: Remove package foo and delete modified configuration files
    - code: "apk: pkg=foo state=latest"
      description: Update package foo to newest available version
'''

import json
import shlex
import os
import sys

def update(module):
    rc = os.system("apk -q update")

    if rc != 0:
        module.fail_json(msg="failed to update package database")

def remove(module, pkgs, opts):
    removed = 0

    for pkg in pkgs:
        rc = os.system("apk -q del %s %s" % (opts, pkg))

        if rc == 0:
            removed += 1
        else:
            module.fail_json(msg="failed to remove %s" % pkg)

    if removed > 0:
        module.exit_json(changed=True, msg="removed %s package(s) (or already absent)" % removed)
    module.exit_json(changed=False, msg="failed to remove specified packages")

def install(module, pkgs, opts):
    installed = 0

    for pkg in pkgs:
        rc = os.system("apk -q add %s %s" % (opts, pkg))

        if rc == 0:
            installed += 1
        else:
            module.fail_json(msg="failed to install %s" % pkg)

    if installed >= 1:
        module.exit_json(changed=True, msg="installed %s package(s) (or already present)" % installed)
    module.exit_json(changed=False, msg="failed to install specified packages")

def main():
    module = AnsibleModule(
            argument_spec   = dict(
                pkg         = dict(aliases=["name"], required=False),
                state       = dict(default="present", choices=["absent","latest","present","purge"]),
                update      = dict(default="no", type="bool"),
                force       = dict(default="no", type="bool")))

    if not os.path.exists("/sbin/apk"):
        module.fail_json(msg="unable to find apk executable")

    p = module.params

    if p["update"]:
        update(module)

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

    opts = ''
    if p["force"]:
        opts += " --force"
    if p["state"] == "latest":
        opts += " --upgrade"
    if p["state"] == "purge":
        opts += " --purge"

    if p["state"] in [ "present", "latest" ]:
        install(module, pkgs, opts)
    else:
        remove(module, pkgs, opts)

#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()