from __future__ import (absolute_import, division, print_function)
from binascii import Incomplete
from email.policy import default
__metaclass__ = type

DOCUMENTATION = r'''
---
name: topdesk_am
short_description: Topdesk Asset Management Inventory
author: Martijn Remmen <mremmen@kembit.nl>

description:
    - Constructs an inventory from TOPdesk Asset Management.

options:
    url:
        type: str
        required: true
        description:
        - The TOPDesk url
    username:
        type: str
        required: true
        description:
        - A TOPDesk username for authenticating with the TOPDesk API
    application_key:
        type: str
        required: true
        description:
        - A TOPDesk application key associated with the given username.
        - "For instructions on creating a key: https://developers.topdesk.com/tutorial.html"
    fields:
        type: list
        required: true
        description:
        - A list of fields from Asset Management that you want to be included
        - with the hosts.
    names:
        type: list
        required: true
        description:
        - A list containing the unique names from all assets you want to include
        - in the inventory
    ansible_host:
        type: str
        required: true
        description:
        - The fieldname of the value to be used as ansible_host.
        - This should be the field with a reachable hostname or IP address
    groupby:
        type: list
        description:
        - "Group hosts based on field(s)"

'''

EXAMPLES = '''

'''

from ansible.plugins.inventory import BaseInventoryPlugin
from ansible.utils.display import Display

import requests

display = Display()


class InventoryModule(BaseInventoryPlugin):

    NAME = 'kembit.topdesk.topdesk_am'


    def __init__(self):
        super(BaseInventoryPlugin, self).__init__()


    def verify_file(self, path):
        # return super().verify_file(path)
        return True


    def parse(self, inventory, loader, path, cache=True):
        super(InventoryModule, self).parse(inventory, loader, path)

        self._read_config_data(path)

        url = self.get_option('url')
        username = self.get_option('username')
        application_key = self.get_option('application_key')
        fields = self.get_option('fields')
        device_names = self.get_option('names')
        ansible_host_field = self.get_option('ansible_host')
        groupby = self.get_option('groupby')

        td = Topdesk(url, username, application_key)

        columns, devices = devices_lookup(td, device_names, fields)
        column_lookup_table = create_id_lookup_table(td, columns)
        replace_ids(devices, column_lookup_table)

        # validgroupfields = [group for group in groupby if group in fields]

        # groupvalues = dict(default=list)
        # for device in devices:
        #     for groupfield in validgroupfields:
        #         groupvalues[groupfield]
        #         device[groupfield]


        #     self.inventory.add_group(column_lookup_table[group].values())


        for device in devices:
            name = device['name']
            self.inventory.add_host(name)
            self.inventory.set_variable(name, 'ansible_host', device[ansible_host_field])
            for field, value in device.items():
                if field != 'name' and field in fields:
                    self.inventory.set_variable(name, field, value)

        display.display(f"Added {len(devices)} hosts")



class Topdesk:

    def __init__(self, url: str, username: str, application_key: str) -> None:
        self.url = url
        self.api_url = url + '/tas/api'
        self._session = requests.Session()
        self._session.auth = (username, application_key)
        self._headers = {'accept': 'application/json'}


    def get(self, endpoint: str, **kwargs) -> requests.Request:
        return self._session.get(self.api_url + endpoint, **kwargs)

    

def get_asset(td: Topdesk, parameters: dict):
    return td.get('/assetmgmt/assets', params=parameters)


def create_parameters(
    fields: list[str],
    name: str,
    includefunctionalities: bool = False,
    includesettings: bool = False,
    includetemplates: bool = False
    ):
    return {
        'fields': ','.join(fields),
        '$filter': f'name eq {name}',
        'includeFunctionalities': str(includefunctionalities),
        'includeSettings': str(includesettings),
        'includeTemplates': str(includetemplates)
    }



def create_id_lookup_table(td: Topdesk, columns: dict) -> dict:
    table = {}

    for columnname, columndata in columns.items():
        column_properties = columndata.get('properties')

        if not column_properties:
            continue
        
        column_url = column_properties.get('url')
        if column_url:
            data = td.get("/assetmgmt/" + column_url).json()['dataSet']
            table.update({columnname: {value['id']: value['text'] for value in data}})
    
    return table



def devices_lookup(td: Topdesk, device_names: list[str], fields: list[str]):

    columns = {}
    devices = []

    for device in device_names:
        params = create_parameters(fields, device)
        data = get_asset(td, params).json()

        columns.update({column['fieldName']: column for column in data['columns']})
        devices.extend(data['dataSet'])

    return columns, devices

def replace_ids(devices, column_lookup_table):
    for device in devices:
        for fieldname, fieldvalue in device.items():
            if fieldname in column_lookup_table.keys():
                if fieldvalue: # soms is het None
                    device[fieldname] = column_lookup_table[fieldname][fieldvalue]



def main():
    pass



if __name__ == '__main__':
    main()