# Copyright: (c) 2018, Ansible Project
# GNU General Public License v3.0+
# (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

DOCUMENTATION = '''
---
author: Unknown (!UNKNOWN)
name: edgeos
short_description: Use edgeos cliconf to run command on EdgeOS platform
description:
  - This edgeos plugin provides low level abstraction apis for
    sending and receiving CLI commands from Ubiquiti EdgeOS 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.module_utils.common._collections_compat import Mapping
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.utils import to_list
from ansible.plugins.cliconf import CliconfBase


class Cliconf(CliconfBase):

    def get_device_info(self):
        device_info = {}

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

        match = re.search(r'Version:\s*v?(\S+)', data)
        if match:
            device_info['network_os_version'] = match.group(1)

        match = re.search(r'HW model:\s*(\S+)', data)
        if match:
            device_info['network_os_model'] = match.group(1)

        reply = self.get('show host name')
        device_info['network_os_hostname'] = to_text(reply, errors='surrogate_or_strict').strip()

        return device_info

    def get_config(self, source='running', flags=None, format='text'):
        return self.send_command('show configuration commands|cat')

    def edit_config(self, candidate=None, commit=True, replace=False, comment=None):
        for cmd in chain(['configure'], to_list(candidate)):
            self.send_command(cmd)

    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 commit(self, comment=None):
        if comment:
            command = 'commit comment "{0}"'.format(comment)
        else:
            command = 'commit'
        self.send_command(command)

    def discard_changes(self, *args, **kwargs):
        self.send_command('exit discard')

    def run_commands(self, commands=None, check_rc=True):
        if commands is None:
            raise ValueError("'commands' value is required")

        responses = list()
        for cmd in to_list(commands):
            if not isinstance(cmd, Mapping):
                cmd = {'command': cmd}

            output = cmd.pop('output', None)
            if output:
                raise ValueError("'output' value %s is not supported for run_commands" % output)

            try:
                out = self.send_command(**cmd)
            except AnsibleConnectionFailure as e:
                if check_rc:
                    raise
                out = getattr(e, 'err', e)

            responses.append(out)

        return responses

    def get_device_operations(self):
        return {
            'supports_diff_replace': False,
            'supports_commit': True,
            'supports_rollback': False,
            'supports_defaults': False,
            'supports_onbox_diff': False,
            'supports_commit_comment': True,
            'supports_multiline_delimiter': False,
            'supports_diff_match': False,
            'supports_diff_ignore_lines': False,
            'supports_generate_diff': False,
            'supports_replace': False
        }

    def get_capabilities(self):
        result = super(Cliconf, self).get_capabilities()
        result['rpc'] += ['commit', 'discard_changes', 'run_commands']
        result['device_operations'] = self.get_device_operations()
        return json.dumps(result)