#!/usr/bin/env python

# 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 json
import os
import requests
import argparse

RACKHD_URL = 'http://localhost:8080'


class RackhdInventory(object):
    def __init__(self, nodeids):
        self._inventory = {}
        for nodeid in nodeids:
            self._load_inventory_data(nodeid)
        inventory = {}
        for (nodeid, info) in self._inventory.items():
            inventory[nodeid] = (self._format_output(nodeid, info))
        print(json.dumps(inventory))

    def _load_inventory_data(self, nodeid):
        info = {}
        info['ohai'] = RACKHD_URL + '/api/common/nodes/{0}/catalogs/ohai'.format(nodeid)
        info['lookup'] = RACKHD_URL + '/api/common/lookups/?q={0}'.format(nodeid)

        results = {}
        for (key, url) in info.items():
            r = requests.get(url, verify=False)
            results[key] = r.text
        self._inventory[nodeid] = results

    def _format_output(self, nodeid, info):
        try:
            node_info = json.loads(info['lookup'])
            ipaddress = ''
            if len(node_info) > 0:
                ipaddress = node_info[0]['ipAddress']
            output = {'hosts': [ipaddress], 'vars': {}}
            for (key, result) in info.items():
                output['vars'][key] = json.loads(result)
            output['vars']['ansible_ssh_user'] = 'monorail'
        except KeyError:
            pass
        return output


def parse_args():
    parser = argparse.ArgumentParser()
    parser.add_argument('--host')
    parser.add_argument('--list', action='store_true')
    return parser.parse_args()


try:
    # check if rackhd url(ie:10.1.1.45:8080) is specified in the environment
    RACKHD_URL = 'http://' + str(os.environ['RACKHD_URL'])
except Exception:
    # use default values
    pass

# Use the nodeid specified in the environment to limit the data returned
# or return data for all available nodes
nodeids = []

if (parse_args().host):
    try:
        nodeids += parse_args().host.split(',')
        RackhdInventory(nodeids)
    except Exception:
        pass
if (parse_args().list):
    try:
        url = RACKHD_URL + '/api/common/nodes'
        r = requests.get(url, verify=False)
        data = json.loads(r.text)
        for entry in data:
            if entry['type'] == 'compute':
                nodeids.append(entry['id'])
        RackhdInventory(nodeids)
    except Exception:
        pass