#
# (c) 2016 Red Hat Inc.
#
# 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/>.
#
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

import sys
import copy

from ansible import constants as C
from ansible.module_utils._text import to_text
from ansible.module_utils.connection import Connection
from ansible.module_utils.network.eos.eos import eos_provider_spec
from ansible.plugins.action.network import ActionModule as ActionNetworkModule
from ansible.module_utils.network.common.utils import load_provider
from ansible.utils.display import Display

display = Display()


class ActionModule(ActionNetworkModule):

    def run(self, tmp=None, task_vars=None):
        del tmp  # tmp no longer has any effect

        self._config_module = True if self._task.action == 'eos_config' else False
        socket_path = None

        if self._play_context.connection in ('network_cli', 'httpapi'):
            provider = self._task.args.get('provider', {})
            if any(provider.values()):
                display.warning('provider is unnecessary when using %s and will be ignored' % self._play_context.connection)
                del self._task.args['provider']
            if self._task.args.get('transport'):
                display.warning('transport is unnecessary when using %s and will be ignored' % self._play_context.connection)
                del self._task.args['transport']
        elif self._play_context.connection == 'local':
            provider = load_provider(eos_provider_spec, self._task.args)
            transport = provider['transport'] or 'cli'

            display.vvvv('connection transport is %s' % transport, self._play_context.remote_addr)

            if transport == 'cli':
                pc = copy.deepcopy(self._play_context)
                pc.connection = 'network_cli'
                pc.network_os = 'eos'
                pc.remote_addr = provider['host'] or self._play_context.remote_addr
                pc.port = int(provider['port'] or self._play_context.port or 22)
                pc.remote_user = provider['username'] or self._play_context.connection_user
                pc.password = provider['password'] or self._play_context.password
                pc.private_key_file = provider['ssh_keyfile'] or self._play_context.private_key_file
                pc.become = provider['authorize'] or False
                if pc.become:
                    pc.become_method = 'enable'
                pc.become_pass = provider['auth_pass']

                display.vvv('using connection plugin %s (was local)' % pc.connection, pc.remote_addr)
                connection = self._shared_loader_obj.connection_loader.get('persistent', pc, sys.stdin)

                command_timeout = int(provider['timeout']) if provider['timeout'] else connection.get_option('persistent_command_timeout')
                connection.set_options(direct={'persistent_command_timeout': command_timeout})

                socket_path = connection.run()
                display.vvvv('socket_path: %s' % socket_path, pc.remote_addr)
                if not socket_path:
                    return {'failed': True,
                            'msg': 'unable to open shell. Please see: ' +
                                   'https://docs.ansible.com/ansible/network_debug_troubleshooting.html#unable-to-open-shell'}

                task_vars['ansible_socket'] = socket_path

            else:
                self._task.args['provider'] = ActionModule.eapi_implementation(provider, self._play_context)
        else:
            return {'failed': True, 'msg': 'Connection type %s is not valid for this module' % self._play_context.connection}

        if (self._play_context.connection == 'local' and transport == 'cli') or self._play_context.connection == 'network_cli':
            # make sure we are in the right cli context which should be
            # enable mode and not config module
            if socket_path is None:
                socket_path = self._connection.socket_path

            conn = Connection(socket_path)
            out = conn.get_prompt()
            while '(config' in to_text(out, errors='surrogate_then_replace').strip():
                display.vvvv('wrong context, sending exit to device', self._play_context.remote_addr)
                conn.send_command('abort')
                out = conn.get_prompt()

        result = super(ActionModule, self).run(task_vars=task_vars)
        return result

    @staticmethod
    def eapi_implementation(provider, play_context):
        provider['transport'] = 'eapi'

        if provider.get('host') is None:
            provider['host'] = play_context.remote_addr

        if provider.get('port') is None:
            default_port = 443 if provider['use_ssl'] else 80
            provider['port'] = int(play_context.port or default_port)

        if provider.get('timeout') is None:
            provider['timeout'] = C.PERSISTENT_COMMAND_TIMEOUT

        if provider.get('username') is None:
            provider['username'] = play_context.connection_user

        if provider.get('password') is None:
            provider['password'] = play_context.password

        if provider.get('authorize') is None:
            provider['authorize'] = False

        return provider
