#!/usr/bin/python
# -*- coding: utf-8 -*-

# (c) 2017, Ansible by Red Hat, inc
# 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 = """
module: junos_rpc
author: Peter Sprygada (@privateip)
short_description: Runs an arbitrary RPC over NetConf on an Juniper JUNOS device
description:
- Sends a request to the remote device running JUNOS to execute the specified RPC
  using the NetConf transport.  The reply is then returned to the playbook in the
  C(xml) key.  If an alternate output format is requested, the reply is transformed
  to the requested output.
version_added: 1.0.0
extends_documentation_fragment:
- junipernetworks.junos.junos
options:
  rpc:
    description:
    - The C(rpc) argument specifies the RPC call to send to the remote devices to
      be executed.  The RPC Reply message is parsed and the contents are returned
      to the playbook.
    type: str
    required: true
  args:
    description:
    - The C(args) argument provides a set of arguments for the RPC call and are encoded
      in the request message.  This argument accepts a set of key=value arguments.
    type: dict
  attrs:
    description:
    - The C(attrs) arguments defines a list of attributes and their values to set
      for the RPC call. This accepts a dictionary of key-values.
    type: dict
  output:
    description:
    - The C(output) argument specifies the desired output of the return data.  This
      argument accepts one of C(xml), C(text), or C(json).  For C(json), the JUNOS
      device must be running a version of software that supports native JSON output.
    default: xml
    type: str
    choices: ["xml", "json", "text"]
requirements:
- ncclient (>=v0.5.2)
notes:
- This module requires the netconf system service be enabled on the remote device
  being managed.
- Tested against vSRX JUNOS version 15.1X49-D15.4, vqfx-10000 JUNOS Version 15.1X53-D60.4.
- Recommended connection is C(netconf). See L(the Junos OS Platform Options,../network/user_guide/platform_junos.html).
- This module also works with C(local) connections for legacy playbooks.
"""

EXAMPLES = """
- name: collect interface information using rpc
  junipernetworks.junos.junos_rpc:
    rpc: get-interface-information
    args:
      interface-name: em0
      media: true

- name: get system information
  junipernetworks.junos.junos_rpc:
    rpc: get-system-information

- name: load configuration
  junipernetworks.junos.junos_rpc:
    rpc: load-configuration
    attrs:
      action: override
      url: /tmp/config.conf
"""

RETURN = """
xml:
  description: The xml return string from the rpc request.
  returned: always
  type: str
output:
  description: The rpc rely converted to the output format.
  returned: always
  type: str
output_lines:
  description: The text output split into lines for readability.
  returned: always
  type: list
"""
from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.six import iteritems
from ansible_collections.ansible.netcommon.plugins.module_utils.network.common.netconf import (
    exec_rpc,
)

from ansible_collections.junipernetworks.junos.plugins.module_utils.network.junos.junos import (
    tostring,
)


USE_PERSISTENT_CONNECTION = True

try:
    from lxml.etree import Element, SubElement
except ImportError:
    from xml.etree.ElementTree import Element, SubElement


def main():
    """main entry point for Ansible module"""
    argument_spec = dict(
        rpc=dict(required=True),
        args=dict(type="dict"),
        attrs=dict(type="dict"),
        output=dict(default="xml", choices=["xml", "json", "text"]),
    )

    module = AnsibleModule(
        argument_spec=argument_spec,
        supports_check_mode=False,
    )

    warnings = list()
    result = {"changed": False, "warnings": warnings}

    rpc = str(module.params["rpc"]).replace("_", "-")

    if all((module.check_mode, not rpc.startswith("get"))):
        module.fail_json(msg="invalid rpc for running in check_mode")

    args = module.params["args"] or {}
    attrs = module.params["attrs"] or {}

    xattrs = {"format": module.params["output"]}

    for key, value in iteritems(attrs):
        xattrs.update({key: value})

    element = Element(module.params["rpc"], xattrs)

    for key, value in iteritems(args):
        key = str(key).replace("_", "-")
        if isinstance(value, list):
            for item in value:
                child = SubElement(element, key)
                if item is not True:
                    child.text = item
        else:
            child = SubElement(element, key)
            if value is not True:
                child.text = value

    reply = exec_rpc(module, tostring(element), ignore_warning=False)

    result["xml"] = tostring(reply)

    if module.params["output"] == "text":
        data = reply.find(".//output")
        result["output"] = data.text.strip()
        result["output_lines"] = result["output"].split("\n")

    elif module.params["output"] == "json":
        result["output"] = module.from_json(reply.text.strip())

    else:
        result["output"] = tostring(reply).split("\n")

    module.exit_json(**result)


if __name__ == "__main__":
    main()