# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

from __future__ import print_function

import sys

import prettytable
import six

from manilaclient.openstack.common import strutils


def _print(pt, order):
    if sys.version_info >= (3, 0):
        print(pt.get_string(sortby=order))
    else:
        print(strutils.safe_encode(pt.get_string(sortby=order)))


# NOTE(vponomaryov): replace function 'print_list' and 'print_dict'
#                    with functions from cliutils, when bug #1342050 is fixed
def print_list(objs, fields, formatters={}, order_by=None):
    mixed_case_fields = ['serverId']
    pt = prettytable.PrettyTable([f for f in fields], caching=False)
    pt.aligns = ['l' for f in fields]

    for o in objs:
        row = []
        for field in fields:
            if field in formatters:
                row.append(formatters[field](o))
            else:
                if field in mixed_case_fields:
                    field_name = field.replace(' ', '_')
                else:
                    field_name = field.lower().replace(' ', '_')
                data = getattr(o, field_name, '')
                row.append(data)
        pt.add_row(row)

    if order_by is None:
        order_by = fields[0]

    _print(pt, order_by)


def print_dict(d, property="Property"):
    pt = prettytable.PrettyTable([property, 'Value'], caching=False)
    pt.aligns = ['l', 'l']
    [pt.add_row(list(r)) for r in six.iteritems(d)]
    _print(pt, property)


class HookableMixin(object):
    """Mixin so classes can register and run hooks."""
    _hooks_map = {}

    @classmethod
    def add_hook(cls, hook_type, hook_func):
        if hook_type not in cls._hooks_map:
            cls._hooks_map[hook_type] = []

        cls._hooks_map[hook_type].append(hook_func)

    @classmethod
    def run_hooks(cls, hook_type, *args, **kwargs):
        hook_funcs = cls._hooks_map.get(hook_type) or []
        for hook_func in hook_funcs:
            hook_func(*args, **kwargs)


def safe_issubclass(*args):
    """Like issubclass, but will just return False if not a class."""

    try:
        if issubclass(*args):
            return True
    except TypeError:
        pass

    return False