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

# Copyright 2012 Dag Wieers <dag@wieers.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 = '''
---
author: Dag Wieers
module: hpilo_boot
short_description: Boot system using specific media through HP iLO interface
description:
  - "This module boots a system through its HP iLO interface. The boot media
    can be one of: cdrom, floppy, hdd, network or usb."
  - This module requires the hpilo python module.
version_added: "0.8"
options:
  host:
    description:
      - The HP iLO hostname/address that is linked to the physical system.
    required: true
  login:
    description:
      - The login name to authenticate to the HP iLO interface.
    default: Administrator
  password:
    description:
      - The password to authenticate to the HP iLO interface.
    default: admin
  match:
    description:
      - An optional string to match against the iLO server name.
      - This is a safety measure to prevent accidentally using the wrong
        HP iLO interface with dire consequences.
  media:
    description:
      - The boot media to boot the system from
    default: network
    choices: [ "cdrom", "floppy", "hdd", "network", "normal", "usb" ]
  image:
    description:
      - "The URL of a cdrom, floppy or usb boot media image.
        C(protocol://username:password@hostname:port/filename)"
      - protocol is either C(http) or C(https)
      - "username:password is optional"
      - port is optional
  state:
    description:
      - The state of the boot media.
      - "no_boot: Do not boot from the device"
      - "boot_once: Boot from the device once and then notthereafter"
      - "boot_always: Boot from the device each time the serveris rebooted"
      - "connect: Connect the virtual media device and set to boot_always"
      - "disconnect: Disconnects the virtual media device and set to no_boot"
    default: boot_once
    choices: [ "boot_always", "boot_once", "connect", "disconnect", "no_boot" ]
  force:
    description:
      - Whether to force a reboot (even when the system is already booted)
    default: no
    choices: [ "yes", "no" ]
examples:
  - description: Task to boot a system using an ISO from an HP iLO interface only if the system is an HP server
    code: |
      local_action: hpilo_boot host=$ilo_address login=$ilo_login password=$ilo_password match=$inventory_hostname_short media=cdrom image=$iso_url
      only_if: "'$cmdb_hwmodel'.startswith('HP ')
notes:
  - To use a USB key image you need to specify floppy as boot media.
  - This module ought to be run from a system that can access the HP iLO
    interface directly, either by using C(local_action) or
    using C(delegate_to).
'''

import sys
import warnings
try:
    import hpilo
except ImportError:
    print "failed=True msg='hpilo python module unavailable'"
    sys.exit(1)

# Surpress warnings from hpilo
warnings.simplefilter('ignore')

def main():

    module = AnsibleModule(
        argument_spec = dict(
            host = dict(required=True),
            login = dict(default='Administrator'),
            password = dict(default='admin'),
            match = dict(default=None),
            media = dict(default=None, choices=['cdrom', 'floppy', 'hdd', 'network', 'normal', 'usb']),
            image = dict(default=None),
            state = dict(default='boot_once', choices=['boot_always', 'boot_once', 'connect', 'disconnect', 'no_boot']),
            force = dict(default='no', choices=BOOLEANS),
        )
    )

    host = module.params.get('host')
    login = module.params.get('login')
    password = module.params.get('password')
    match = module.params.get('match')
    media = module.params.get('media')
    image = module.params.get('image')
    state = module.params.get('state')
    force = module.boolean(module.params.get('force'))

    ilo = hpilo.Ilo(host, login=login, password=password)

    # If match=string is provided, only reboot server if iLO name matches 'string'
    if match != None:
        try:
            server_name = ilo.get_server_name()
        except Exception, e:
            module.fail_json(rc=1, msg='Failed to connect to %s: %s' % (host, e.message))

        if not server_name.lower().startswith(match.lower()):
            module.fail_json(rc=1, msg='The iLO server name \'%s\' does not match \'%s\'' % (server_name, match))

    if media:

        # Workaround for: Error communicating with iLO: Problem manipulating EV
        try:
            ilo.set_one_time_boot(media)
        except hpilo.IloError:
            time.sleep(60)
            ilo.set_one_time_boot(media)

        # TODO: Verify if image URL exists/works
        if image:
            ilo.insert_virtual_media(media, image)

        if media == 'cdrom':
            ilo.set_vm_status('cdrom', state, True)
            status = ilo.get_vm_status()
        elif media == 'floppy':
            ilo.set_vf_status(state, True)
            status = ilo.get_vf_status()
        elif media == 'usb':
            ilo.set_vf_status(state, True)
            status = ilo.get_vf_status()

    # Only perform a boot when state is boot_once or boot_always, or in case we want to force a reboot
    if state in ('boot_once', 'boot_always') or force:

        power_status = ilo.get_host_power_status()

        if not force and power_status == 'ON':
            module.fail_json(rc=1, msg='The server \'%s\' is already powered on !' % server_name)

        if power_status == 'ON':
            ilo.warm_boot_server()
        else:
            ilo.cold_boot_server()

    module.exit_json(changed=True, **status)

# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>
main()