import contextlib
import datetime
import json
import time
import uuid

from pagermaid import Config, logs
from pagermaid.enums import Client, Message
from pagermaid.services import client as request
from pagermaid.hook import Hook


class DatetimeSerializer(json.JSONEncoder):
    def default(self, obj):
        if isinstance(obj, datetime.datetime):
            fmt = '%Y-%m-%dT%H:%M:%S'
            return obj.strftime(fmt)

        return json.JSONEncoder.default(self, obj)


class Mixpanel:
    def __init__(self, token: str):
        self._token = token
        self._serializer = DatetimeSerializer
        self._request = request
        self.api_host = "api.mixpanel.com"

    @staticmethod
    def _now():
        return time.time()

    @staticmethod
    def _make_insert_id():
        return uuid.uuid4().hex

    @staticmethod
    def json_dumps(data, cls=None):
        # Separators are specified to eliminate whitespace.
        return json.dumps(data, separators=(',', ':'), cls=cls)

    async def api_call(self, endpoint, json_message):
        _endpoints = {
            'events': f'https://{self.api_host}/track',
            'people': f'https://{self.api_host}/engage',
        }
        request_url = _endpoints.get(endpoint)
        if request_url is None:
            return
        params = {
            'data': json_message,
            'verbose': 1,
            'ip': 0,
        }
        start = self._now()
        with contextlib.suppress(Exception):
            await self._request.post(
                request_url,
                data=params,
                timeout=10.0
            )
        logs.debug(f"Mixpanel request took {self._now() - start} seconds")

    async def people_set(self, distinct_id: str, properties: dict):
        message = {
            '$distinct_id': distinct_id,
            '$set': properties,
        }
        record = {'$token': self._token, '$time': self._now()} | message
        return await self.api_call('people', self.json_dumps(record, cls=self._serializer))

    async def track(self, distinct_id: str, event_name: str, properties: dict):
        all_properties = {
            'token': self._token,
            'distinct_id': distinct_id,
            'time': self._now(),
            '$insert_id': self._make_insert_id(),
            'mp_lib': 'python',
            '$lib_version': '4.10.0',
        }
        if properties:
            all_properties |= properties
        event = {
            'event': event_name,
            'properties': all_properties,
        }
        return await self.api_call('events', self.json_dumps(event, cls=self._serializer))


mp = Mixpanel(Config.MIXPANEL_API)


@Hook.on_startup()
async def mixpanel_init_id(bot: Client):
    if not bot.me:
        bot.me = await bot.get_me()
    data = {'$first_name': bot.me.first_name}
    if bot.me.username:
        data["username"] = bot.me.username
    bot.loop.create_task(mp.people_set(str(bot.me.id), data))


@Hook.command_postprocessor()
async def mixpanel_report(bot: Client, message: Message, command):
    if not Config.ALLOW_ANALYTIC:
        return
    if not bot.me:
        bot.me = await bot.get_me()
    sender_id = message.from_user.id if message.from_user else ""
    sender_id = message.sender_chat.id if message.sender_chat else sender_id
    if sender_id < 0 and message.outgoing:
        sender_id = bot.me.id
    bot.loop.create_task(mp.track(str(sender_id), f'Function {command}', {'command': command, "bot_id": bot.me.id}))