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

# Copyright (c) 2021, Cisco Systems
# GNU General Public License v3.0+ (see LICENSE or
# https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
from ansible.plugins.action import ActionBase
try:
    from ansible_collections.ansible.utils.plugins.module_utils.common.argspec_validate import (
        AnsibleArgSpecValidator,
    )
except ImportError:
    ANSIBLE_UTILS_IS_INSTALLED = False
else:
    ANSIBLE_UTILS_IS_INSTALLED = True
from ansible.errors import AnsibleActionFail
from ansible_collections.cisco.meraki.plugins.plugin_utils.meraki import (
    MERAKI,
    meraki_argument_spec,
    meraki_compare_equality,
    get_dict_result,
)
from ansible_collections.cisco.meraki.plugins.plugin_utils.exceptions import (
    InconsistentParameters,
)

# Get common arguments specification
argument_spec = meraki_argument_spec()
# Add arguments specific for this module
argument_spec.update(dict(
    state=dict(type="str", default="present", choices=["present"]),
    dhcpMode=dict(type="str"),
    dhcpRelayServerIps=dict(type="list"),
    dhcpLeaseTime=dict(type="str"),
    dnsNameserversOption=dict(type="str"),
    dnsCustomNameservers=dict(type="list"),
    bootOptionsEnabled=dict(type="bool"),
    bootNextServer=dict(type="str"),
    bootFileName=dict(type="str"),
    dhcpOptions=dict(type="list"),
    reservedIpRanges=dict(type="list"),
    fixedIpAssignments=dict(type="list"),
    serial=dict(type="str"),
    interfaceId=dict(type="str"),
))

required_if = [
    ("state", "present", ["interfaceId", "serial"], True),
]
required_one_of = []
mutually_exclusive = []
required_together = []


class DevicesSwitchRoutingInterfacesDhcp(object):
    def __init__(self, params, meraki):
        self.meraki = meraki
        self.new_object = dict(
            dhcpMode=params.get("dhcpMode"),
            dhcpRelayServerIps=params.get("dhcpRelayServerIps"),
            dhcpLeaseTime=params.get("dhcpLeaseTime"),
            dnsNameserversOption=params.get("dnsNameserversOption"),
            dnsCustomNameservers=params.get("dnsCustomNameservers"),
            bootOptionsEnabled=params.get("bootOptionsEnabled"),
            bootNextServer=params.get("bootNextServer"),
            bootFileName=params.get("bootFileName"),
            dhcpOptions=params.get("dhcpOptions"),
            reservedIpRanges=params.get("reservedIpRanges"),
            fixedIpAssignments=params.get("fixedIpAssignments"),
            serial=params.get("serial"),
            interface_id=params.get("interfaceId"),
        )

    def get_all_params(self, name=None, id=None):
        new_object_params = {}
        if self.new_object.get('serial') is not None or self.new_object.get('serial') is not None:
            new_object_params['serial'] = self.new_object.get('serial')
        if self.new_object.get('interfaceId') is not None or self.new_object.get('interface_id') is not None:
            new_object_params['interfaceId'] = self.new_object.get('interfaceId') or \
                self.new_object.get('interface_id')
        return new_object_params

    def update_all_params(self):
        new_object_params = {}
        if self.new_object.get('dhcpMode') is not None or self.new_object.get('dhcp_mode') is not None:
            new_object_params['dhcpMode'] = self.new_object.get('dhcpMode') or \
                self.new_object.get('dhcp_mode')
        if self.new_object.get('dhcpRelayServerIps') is not None or self.new_object.get('dhcp_relay_server_ips') is not None:
            new_object_params['dhcpRelayServerIps'] = self.new_object.get('dhcpRelayServerIps') or \
                self.new_object.get('dhcp_relay_server_ips')
        if self.new_object.get('dhcpLeaseTime') is not None or self.new_object.get('dhcp_lease_time') is not None:
            new_object_params['dhcpLeaseTime'] = self.new_object.get('dhcpLeaseTime') or \
                self.new_object.get('dhcp_lease_time')
        if self.new_object.get('dnsNameserversOption') is not None or self.new_object.get('dns_nameservers_option') is not None:
            new_object_params['dnsNameserversOption'] = self.new_object.get('dnsNameserversOption') or \
                self.new_object.get('dns_nameservers_option')
        if self.new_object.get('dnsCustomNameservers') is not None or self.new_object.get('dns_custom_nameservers') is not None:
            new_object_params['dnsCustomNameservers'] = self.new_object.get('dnsCustomNameservers') or \
                self.new_object.get('dns_custom_nameservers')
        if self.new_object.get('bootOptionsEnabled') is not None or self.new_object.get('boot_options_enabled') is not None:
            new_object_params['bootOptionsEnabled'] = self.new_object.get('bootOptionsEnabled')
        if self.new_object.get('bootNextServer') is not None or self.new_object.get('boot_next_server') is not None:
            new_object_params['bootNextServer'] = self.new_object.get('bootNextServer') or \
                self.new_object.get('boot_next_server')
        if self.new_object.get('bootFileName') is not None or self.new_object.get('boot_file_name') is not None:
            new_object_params['bootFileName'] = self.new_object.get('bootFileName') or \
                self.new_object.get('boot_file_name')
        if self.new_object.get('dhcpOptions') is not None or self.new_object.get('dhcp_options') is not None:
            new_object_params['dhcpOptions'] = self.new_object.get('dhcpOptions') or \
                self.new_object.get('dhcp_options')
        if self.new_object.get('reservedIpRanges') is not None or self.new_object.get('reserved_ip_ranges') is not None:
            new_object_params['reservedIpRanges'] = self.new_object.get('reservedIpRanges') or \
                self.new_object.get('reserved_ip_ranges')
        if self.new_object.get('fixedIpAssignments') is not None or self.new_object.get('fixed_ip_assignments') is not None:
            new_object_params['fixedIpAssignments'] = self.new_object.get('fixedIpAssignments') or \
                self.new_object.get('fixed_ip_assignments')
        if self.new_object.get('serial') is not None or self.new_object.get('serial') is not None:
            new_object_params['serial'] = self.new_object.get('serial') or \
                self.new_object.get('serial')
        if self.new_object.get('interfaceId') is not None or self.new_object.get('interface_id') is not None:
            new_object_params['interfaceId'] = self.new_object.get('interfaceId') or \
                self.new_object.get('interface_id')
        return new_object_params

    def get_object_by_name(self, name):
        result = None
        # NOTE: Does not have a get by name method, using get all
        try:
            items = self.meraki.exec_meraki(
                family="switch",
                function="getDeviceSwitchRoutingInterfaceDhcp",
                params=self.get_all_params(name=name),
            )
            if isinstance(items, dict):
                if 'response' in items:
                    items = items.get('response')
            result = get_dict_result(items, 'name', name)
            if result is None:
                result = items
        except Exception as e:
            print("Error: ", e)
            result = None
        return result

    def get_object_by_id(self, id):
        result = None
        # NOTE: Does not have a get by id method or it is in another action
        return result

    def exists(self):
        prev_obj = None
        id_exists = False
        name_exists = False
        o_id = self.new_object.get("serial")
        name = self.new_object.get("name")
        if o_id:
            prev_obj = self.get_object_by_name(o_id)
            id_exists = prev_obj is not None and isinstance(prev_obj, dict)
        if not id_exists and name:
            prev_obj = self.get_object_by_name(name)
            name_exists = prev_obj is not None and isinstance(prev_obj, dict)
        if name_exists:
            _id = prev_obj.get("id")
            if id_exists and name_exists and o_id != _id:
                raise InconsistentParameters(
                    "The 'id' and 'name' params don't refer to the same object")
            if _id:
                self.new_object.update(dict(id=_id))
        it_exists = prev_obj is not None and isinstance(prev_obj, dict)
        return (it_exists, prev_obj)

    def requires_update(self, current_obj):
        requested_obj = self.new_object

        obj_params = [
            ("dhcpMode", "dhcpMode"),
            ("dhcpRelayServerIps", "dhcpRelayServerIps"),
            ("dhcpLeaseTime", "dhcpLeaseTime"),
            ("dnsNameserversOption", "dnsNameserversOption"),
            ("dnsCustomNameservers", "dnsCustomNameservers"),
            ("bootOptionsEnabled", "bootOptionsEnabled"),
            ("bootNextServer", "bootNextServer"),
            ("bootFileName", "bootFileName"),
            ("dhcpOptions", "dhcpOptions"),
            ("reservedIpRanges", "reservedIpRanges"),
            ("fixedIpAssignments", "fixedIpAssignments"),
            ("serial", "serial"),
            ("interfaceId", "interfaceId"),
        ]
        # Method 1. Params present in request (Ansible) obj are the same as the current (ISE) params
        # If any does not have eq params, it requires update
        return any(not meraki_compare_equality(current_obj.get(meraki_param),
                                               requested_obj.get(ansible_param))
                   for (meraki_param, ansible_param) in obj_params)

    def update(self):
        id = self.new_object.get("id")
        name = self.new_object.get("name")
        result = None
        result = self.meraki.exec_meraki(
            family="switch",
            function="updateDeviceSwitchRoutingInterfaceDhcp",
            params=self.update_all_params(),
            op_modifies=True,
        )
        return result


class ActionModule(ActionBase):
    def __init__(self, *args, **kwargs):
        if not ANSIBLE_UTILS_IS_INSTALLED:
            raise AnsibleActionFail(
                "ansible.utils is not installed. Execute 'ansible-galaxy collection install ansible.utils'")
        super(ActionModule, self).__init__(*args, **kwargs)
        self._supports_async = False
        self._supports_check_mode = False
        self._result = None

    # Checks the supplied parameters against the argument spec for this module
    def _check_argspec(self):
        aav = AnsibleArgSpecValidator(
            data=self._task.args,
            schema=dict(argument_spec=argument_spec),
            schema_format="argspec",
            schema_conditionals=dict(
                required_if=required_if,
                required_one_of=required_one_of,
                mutually_exclusive=mutually_exclusive,
                required_together=required_together,
            ),
            name=self._task.action,
        )
        valid, errors, self._task.args = aav.validate()
        if not valid:
            raise AnsibleActionFail(errors)

    def run(self, tmp=None, task_vars=None):
        self._task.diff = False
        self._result = super(ActionModule, self).run(tmp, task_vars)
        self._result["changed"] = False
        self._check_argspec()

        meraki = MERAKI(self._task.args)
        obj = DevicesSwitchRoutingInterfacesDhcp(self._task.args, meraki)

        state = self._task.args.get("state")

        response = None
        if state == "present":
            (obj_exists, prev_obj) = obj.exists()
            if obj_exists:
                if obj.requires_update(prev_obj):
                    response = obj.update()
                    meraki.object_updated()
                else:
                    response = prev_obj
                    meraki.object_already_present()
            else:
                meraki.fail_json(
                    "Object does not exists, plugin only has update")

        self._result.update(dict(meraki_response=response))
        self._result.update(meraki.exit_json())
        return self._result
