#!/usr/bin/python


import os
import shutil
import subprocess
import tempfile

import pystache


renderer = pystache.Renderer()
template = os.path.join(os.path.dirname(__file__),
                        '..',
                        'config.json.template')

context = {
    'LOCAL_IP': os.environ.get('LOCAL_IP', '192.0.2.1'),
    'PUBLIC_INTERFACE_IP': os.environ.get('PUBLIC_INTERFACE_IP', '192.0.2.1/24'),
    'LOCAL_INTERFACE': os.environ.get('LOCAL_INTERFACE', 'eth1'),
    'MASQUERADE_NETWORK': os.environ.get('MASQUERADE_NETWORK', '192.0.2.0/24'),
    'DHCP_START': os.environ.get('DHCP_START', '192.0.2.5'),
    'DHCP_END': os.environ.get('DHCP_END', '192.0.2.24'),
    'NETWORK_CIDR': os.environ.get('NETWORK_CIDR', '192.0.2.0/24'),
    'NETWORK_GATEWAY': os.environ.get('NETWORK_GATEWAY', '192.0.2.1'),
    'DISCOVERY_INTERFACE': os.environ.get('DISCOVERY_INTERFACE', 'br-ctlplane'),
    'DISCOVERY_IPRANGE': os.environ.get('DISCOVERY_IPRANGE', '192.0.2.100,192.0.2.120'),
    'DISCOVERY_RUNBENCH': os.environ.get('DISCOVERY_RUNBENCH', '0'),
    'UNDERCLOUD_TUSKAR_PASSWORD': os.environ.get('UNDERCLOUD_TUSKAR_PASSWORD', 'unset'),
    'UNDERCLOUD_IRONIC_PASSWORD': os.environ.get('UNDERCLOUD_IRONIC_PASSWORD', 'unset'),
}

with open(template) as f:
    config_json = renderer.render(f.read(), context)

cfn_path = '/var/lib/heat-cfntools/cfn-init-data'
if not os.path.exists(os.path.dirname(cfn_path)):
    os.makedirs(os.path.dirname(cfn_path))
with open(cfn_path, 'w') as f:
    f.write(config_json)

# Make the json pretty again
tmpfile = tempfile.mkstemp()[1]
outfile = open(tmpfile, 'w')
subprocess.check_call(['jq', '.', cfn_path], stdout=outfile)
outfile.close()
shutil.move(tmpfile, cfn_path)
os.chmod(cfn_path, 0644)