#
# (c) 2017 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

DOCUMENTATION = '''
---
cliconf: ce
short_description: Use ce cliconf to run command on HUAWEI CloudEngine platform
description:
  - This ce plugin provides low level abstraction apis for
    sending and receiving CLI commands from HUAWEI CloudEngine network devices.
'''

import re
import json

from itertools import chain

from ansible.errors import AnsibleConnectionFailure
from ansible.module_utils._text import to_text
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.utils import to_list
from ansible.plugins.cliconf import CliconfBase, enable_mode


class Cliconf(CliconfBase):

    def get_device_info(self):
        device_info = {}

        device_info['network_os'] = 'ce'
        reply = self.get('display version')
        data = to_text(reply, errors='surrogate_or_strict').strip()

        match = re.search(r'^Huawei.+\n.+\Version\s+(\S+)', data)
        if match:
            device_info['network_os_version'] = match.group(1).strip(',')

        match = re.search(r'^Huawei(.+)\n.+\(\S+\s+\S+\)', data, re.M)
        if match:
            device_info['network_os_model'] = match.group(1)

        match = re.search(r'HUAWEI\s+(\S+)\s+uptime', data, re.M)
        if match:
            device_info['network_os_hostname'] = match.group(1)

        return device_info

    @enable_mode
    def get_config(self, source='running', format='text', flags=None):
        if source not in ('running'):
            return self.invalid_params("fetching configuration from %s is not supported" % source)

        if not flags:
            flags = []

        cmd = 'display current-configuration'

        return self.send_command(cmd)

    @enable_mode
    def edit_config(self, command):
        results = []
        for cmd in chain(['configure terminal'], to_list(command), ['end']):
            if isinstance(cmd, dict):
                command = cmd['command']
                prompt = cmd['prompt']
                answer = cmd['answer']
                newline = cmd.get('newline', True)
            else:
                command = cmd
                prompt = None
                answer = None
                newline = True

            results.append(self.send_command(command, prompt, answer, False, newline))
        return results[1:-1]

    def get(self, command, prompt=None, answer=None, sendonly=False, newline=True, check_all=False):
        return self.send_command(command=command, prompt=prompt, answer=answer, sendonly=sendonly, newline=newline, check_all=check_all)

    def get_capabilities(self):
        result = super(Cliconf, self).get_capabilities()
        return json.dumps(result)

    def set_cli_prompt_context(self):
        """
        Make sure we are in the operational cli mode
        :return: None
        """
        if self._connection.connected:
            out = self._connection.get_prompt()

            if out is None:
                raise AnsibleConnectionFailure(message=u'cli prompt is not identified from the last received'
                                                       u' response window: %s' % self._connection._last_recv_window)

            prompt = to_text(out, errors='surrogate_then_replace').strip()
            while prompt.endswith(']'):
                self._connection.queue_message('vvvv', 'wrong context, sending return to device')
                if prompt.startswith('[*'):
                    self._connection.exec_command('clear configuration candidate')
                self._connection.exec_command('return')
                out = self._connection.get_prompt()
                prompt = to_text(out, errors='surrogate_then_replace').strip()
