from datetime import timedelta
from random import randint

import requests
from django.conf import settings
from django.utils import timezone
from urllib.parse import urlencode

def fetch_withings_tokens(authorization_code, redirect_uri):
    token_url_base = "https://wbsapi.withings.net/v2/oauth2"
    token_url_params = {
        'action': 'requesttoken',
        'client_id': settings.WITHINGS_CONFIG['CLIENT_ID'],
        'client_secret': settings.WITHINGS_CONFIG['CLIENT_SECRET'],
        'grant_type': 'authorization_code',
        'code': authorization_code,
        'redirect_uri': redirect_uri
    }
    token_url = f"{token_url_base}?{urlencode(token_url_params)}"
    response = requests.get(token_url)
    response.raise_for_status()

    return response.json()


def mock_fetch_withings_tokens(authorization_code, redirect_uri):
    response = {
        "status": 0,
        "body": {
            "userid": f"{randint(1, 5000)}",
            "access_token": "a075f8c14fb8df40b08ebc8508533dc332a6910a",
            "refresh_token": "f631236f02b991810feb774765b6ae8e6c6839ca",
            "expires_in": 10800,
            "scope": "user.info,user.metrics",
            "csrf_token": "PACnnxwHTaBQOzF7bQqwFUUotIuvtzSM",
            "token_type": "Bearer"
        }
    }
    return response


def save_tokens_to_session(request, response_data):
    request.session['withings_userid'] = response_data['body']['userid']
    request.session['withings_access_token'] = response_data['body']['access_token']
    request.session['withings_refresh_token'] = response_data['body']['refresh_token']

    now = timezone.now()
    request.session['withings_access_token_expiry'] = (now + timedelta(seconds=response_data['body']['expires_in'])).isoformat()
    request.session['withings_refresh_token_expiry'] = (now + timedelta(days=365)).isoformat()