# This code is part of Ansible, but is an independent component.
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# Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
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import os

from ansible.module_utils.six import iteritems


def openstack_argument_spec():
    # DEPRECATED: This argument spec is only used for the deprecated old
    # OpenStack modules. It turns out that modern OpenStack auth is WAY
    # more complex than this.
    # Consume standard OpenStack environment variables.
    # This is mainly only useful for ad-hoc command line operation as
    # in playbooks one would assume variables would be used appropriately
    OS_AUTH_URL = os.environ.get('OS_AUTH_URL', 'http://127.0.0.1:35357/v2.0/')
    OS_PASSWORD = os.environ.get('OS_PASSWORD', None)
    OS_REGION_NAME = os.environ.get('OS_REGION_NAME', None)
    OS_USERNAME = os.environ.get('OS_USERNAME', 'admin')
    OS_TENANT_NAME = os.environ.get('OS_TENANT_NAME', OS_USERNAME)

    spec = dict(
        login_username=dict(default=OS_USERNAME),
        auth_url=dict(default=OS_AUTH_URL),
        region_name=dict(default=OS_REGION_NAME),
        availability_zone=dict(),
    )
    if OS_PASSWORD:
        spec['login_password'] = dict(default=OS_PASSWORD)
    else:
        spec['login_password'] = dict(required=True)
    if OS_TENANT_NAME:
        spec['login_tenant_name'] = dict(default=OS_TENANT_NAME)
    else:
        spec['login_tenant_name'] = dict(required=True)
    return spec


def openstack_find_nova_addresses(addresses, ext_tag, key_name=None):

    ret = []
    for (k, v) in iteritems(addresses):
        if key_name and k == key_name:
            ret.extend([addrs['addr'] for addrs in v])
        else:
            for interface_spec in v:
                if 'OS-EXT-IPS:type' in interface_spec and interface_spec['OS-EXT-IPS:type'] == ext_tag:
                    ret.append(interface_spec['addr'])
    return ret


def openstack_full_argument_spec(**kwargs):
    spec = dict(
        cloud=dict(default=None, type='raw'),
        auth_type=dict(default=None),
        auth=dict(default=None, type='dict', no_log=True),
        region_name=dict(default=None),
        availability_zone=dict(default=None),
        verify=dict(default=None, type='bool', aliases=['validate_certs']),
        cacert=dict(default=None),
        cert=dict(default=None),
        key=dict(default=None, no_log=True),
        wait=dict(default=True, type='bool'),
        timeout=dict(default=180, type='int'),
        api_timeout=dict(default=None, type='int'),
        interface=dict(
            default='public', choices=['public', 'internal', 'admin'],
            aliases=['endpoint_type']),
    )
    spec.update(kwargs)
    return spec


def openstack_module_kwargs(**kwargs):
    ret = {}
    for key in ('mutually_exclusive', 'required_together', 'required_one_of'):
        if key in kwargs:
            if key in ret:
                ret[key].extend(kwargs[key])
            else:
                ret[key] = kwargs[key]

    return ret


def openstack_cloud_from_module(module, min_version='0.12.0'):
    from distutils.version import StrictVersion
    try:
        # Due to the name shadowing we should import other way
        import importlib
        sdk = importlib.import_module('openstack')
    except ImportError:
        module.fail_json(msg='openstacksdk is required for this module')

    if min_version:
        if StrictVersion(sdk.version.__version__) < StrictVersion(min_version):
            module.fail_json(
                msg="To utilize this module, the installed version of"
                    "the openstacksdk library MUST be >={min_version}".format(
                        min_version=min_version))

    cloud_config = module.params.pop('cloud', None)
    try:
        if isinstance(cloud_config, dict):
            fail_message = (
                "A cloud config dict was provided to the cloud parameter"
                " but also a value was provided for {param}. If a cloud"
                " config dict is provided, {param} should be"
                " excluded.")
            for param in (
                    'auth', 'region_name', 'verify',
                    'cacert', 'key', 'api_timeout', 'auth_type'):
                if module.params[param] is not None:
                    module.fail_json(msg=fail_message.format(param=param))
            # For 'interface' parameter, fail if we receive a non-default value
            if module.params['interface'] != 'public':
                module.fail_json(msg=fail_message.format(param='interface'))
            return sdk, sdk.connect(**cloud_config)
        else:
            return sdk, sdk.connect(
                cloud=cloud_config,
                auth_type=module.params['auth_type'],
                auth=module.params['auth'],
                region_name=module.params['region_name'],
                verify=module.params['verify'],
                cacert=module.params['cacert'],
                key=module.params['key'],
                api_timeout=module.params['api_timeout'],
                interface=module.params['interface'],
            )
    except sdk.exceptions.SDKException as e:
        # Probably a cloud configuration/login error
        module.fail_json(msg=str(e))
