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

# (c) 2013, Jimmy Tang <jcftang@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/>.
#

import fnmatch

DOCUMENTATION = '''
---
module: ceph_facts
short_description: Runs the I(ceph) monitoring programs on the remote system
description:
     - Runs the I(ceph) program to discover the filesystem status
       returning JSON data that can be useful for inventory purposes.
version_added: "1.1"
options:
     filter:
        description:
            - if supplied, only return facts that match this shell-style (fnmatch) wildcard.
        required: false
        default: '*' 
examples:
   - code: ansible monitor-ceph01.cluster -m ceph_facts
     description: "Get all the possible known information from ceph cluster"
   - code: ansible monitor-ceph01.cluster -m ceph_facts -a 'filter=quorum*'
     description: "Get all the information related to quorum status"
notes:
   - The facts are not very structured right now and requires more work.
requirements: [ "ceph" ]
author: Jimmy Tang
'''

try:                                                                            
    import json                                                                 
except ImportError:                                                             
    import simplejson as json

def run_ceph_facts(module):
    setup_options = {}
    facts = {}

    # check for quorum of cluster, monmap
    cmd = ["/usr/bin/env", "ceph", "quorum_status"]
    rc, out, err = module.run_command(cmd, check_rc=True)
    quorum = True
    try:
        quorum_ds = json.loads(out)
    except:
        quorum = False
    if quorum:
        for (k,v) in quorum_ds.items():
            setup_options["quorum_status_%s" % k] = v

    # check for status of osd's
    cmd = ["/usr/bin/env", "ceph", "osd", "dump", "--format=json"]
    rc, out, err = module.run_command(cmd, check_rc=True)
    osd = True
    try:
        osd_ds = json.loads(out)
    except:
        osd = False
    if osd:
        for (k,v) in osd_ds.items():
            setup_options["osd_status_%s" % k] = v

    # check for status of mds's
    cmd = ["/usr/bin/env", "ceph", "mds", "dump", "--format=json"]
    rc, out, err = module.run_command(cmd, check_rc=True)
    mds = True
    try:
        mds_ds = json.loads(out)
    except:
        mds = False
    if mds:
        for (k,v) in mds_ds.items():
            setup_options["mds_status_%s" % k] = v

#    # check for status of placement groups
#    cmd = ["/usr/bin/env", "ceph", "pg", "dump", "--format=json"]
#    rc, out, err = module.run_command(cmd, check_rc=True)
#    pg = True
#    try:
#        pg_ds = json.loads(out)
#    except:
#        pg = False
#    if pg:
#        for (k,v) in pg_ds.items():
#            setup_options["pg_%s" % k] = v

    # show osd tree
    cmd = ["/usr/bin/env", "ceph", "osd", "tree", "--format=json"]
    rc, out, err = module.run_command(cmd, check_rc=True)
    osd_tree = True
    try:
        osd_tree_ds = json.loads(out)
    except:
        osd_tree = False
    if osd_tree:
        for (k,v) in osd_tree_ds.items():
            setup_options["osd_tree_%s" % k] = v

    # show rados df
    cmd = ["/usr/bin/env", "rados", "df", "--format=json"]
    rc, out, err = module.run_command(cmd, check_rc=True)
    rados_df = True
    try:
        rados_df_ds = json.loads(out)
    except:
        rados_df = False
    if rados_df:
        for (k,v) in rados_df_ds.items():
            setup_options["rados_df_%s" % k] = v

    # business as usual
    for (k, v) in facts.items():                                                
        setup_options["ceph_%s" % k.replace('-', '_')] = v

    ceph_facts_result = { 'ceph_facts': {} }

    for (k,v) in setup_options.items():
        if module.params['filter'] == '*' or fnmatch.fnmatch(k, module.params['filter']):
            ceph_facts_result['ceph_facts'][k] = v

    return ceph_facts_result

def main():
    global module
    module = AnsibleModule(
        argument_spec = dict(
            filter=dict(default="*", required=False),
        )
    )

    data = run_ceph_facts(module)
    module.exit_json(**data)

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

main()