{#-
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{%- if license is defined -%}
# Copyright {{ license.year }} {{ license.company }}
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# a copy of the License at
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{%- endif %}

import fnmatch
import os
import yaml
import subprocess

from charmhelpers.core.hookenv import config


def create_hosts(cfg, hosts):
    inventory_path = '/etc/ansible/hosts'

    with open(inventory_path, 'w') as f:
        f.write('[{}]\n'.format(hosts))
        h1 = '{0} ansible_connection=ssh ansible_ssh_user={1} ansible_ssh_pass={2} ' \
             'ansible_ssh_private_key_file=~/.ssh/id_juju_sshproxy ' \
             'ansible_python_interpreter=/usr/bin/python\n'.format(cfg['ssh-hostname'], cfg['ssh-username'],
                                                                    cfg['ssh-password'])
        f.write(h1)


def create_ansible_cfg():
    ansible_config_path = '/etc/ansible/ansible.cfg'

    with open(ansible_config_path, 'w') as f:
        f.write('[defaults]\n')
        f.write('host_key_checking = False\n')
        # logs playbook execution attempts to the specified path
        f.write('log_path = /var/log/ansible.log\n')

        f.write('[ssh_connection]\n')
        f.write('control_path=%(directory)s/%%h-%%r\n')
        f.write('control_path_dir=~/.ansible/cp\n')


# Function to find the playbook path
def find(pattern, path):
    result = ''
    for root, dirs, files in os.walk(path):
        for name in files:
            if fnmatch.fnmatch(name, pattern):
                result = os.path.join(root, name)
    return result


def execute_playbook(playbook_file, vars_dict=None):
    playbook_path = find(playbook_file, '/var/lib/juju/agents/')

    cfg = config()

    with open(playbook_path, 'r') as f:
        playbook_data = yaml.load(f)

    hosts = 'all'
    if 'hosts' in playbook_data[0].keys() and playbook_data[0]['hosts']:
        hosts = playbook_data[0]['hosts']

    create_ansible_cfg()
    create_hosts(cfg, hosts)

    call = 'ansible-playbook %s ' % playbook_path

    if vars_dict and isinstance(vars_dict, dict) and len(vars_dict) > 0:
        call += '--extra-vars '

        string_var = ''
        for v in vars_dict.items():
            string_var += '%s=%s ' % v

        string_var = string_var.strip()
        call += '"%s"' % string_var

    call = call.strip()
    result = subprocess.check_output(call, shell=True)

    return result