import os
import requests
from django.db.models import Avg
from django.utils import timezone
from datetime import timedelta

from rest_framework.pagination import PageNumberPagination
from rest_framework.request import Request
from rest_framework import permissions

from .models import WeatherStats
from project.settings_context import TELEGRAM_BOT_TOKEN, TELEGRAM_CHAT_ID

class IsMikrokontroller(permissions.BasePermission):
    
    def has_permission(self, request: Request, view):
        mikro_key = os.environ['MIKRO_SECRET_KEY']
        request_key = request.headers.get('X-Mikro-Key')
        
        return request_key == mikro_key
    
class SmallPageNumberPagination(PageNumberPagination):
    page_size = 200
    page_size_query_param = 'page_size'
    max_page_size = 500

def format_value(val, unit="%"):
    return f"{val:.1f}{unit}" if val is not None else "—"

def send_telegram_stats():
    now = timezone.now()
    thirty_minutes_ago = now - timedelta(minutes=30)
    now_formatted = now.strftime("%d.%m.%Y %H:%M")

    # Collect data
    averages = WeatherStats.objects.filter(
        created_at__gte=thirty_minutes_ago
    ).aggregate(
        avg_humidity_air = Avg('humidity_air'),
        avg_humidity_ground = Avg('humidity_ground'),
        avg_temperature = Avg('temperature'),
        avg_light = Avg('light')
    )

    message = f"""
<b> Weather average stats for 30 mins ({now_formatted})</b>

<b>Humidity Air:</b> {format_value(averages['avg_humidity_air'])}
<b>Humidity Ground:</b> {format_value(averages['avg_humidity_ground'])}
<b>Humidity Temperature:</b> {format_value(averages['avg_temperature', '°C'])}
<b>Light:</b> {format_value(averages['avg_light'])}
"""

    url = f"https://api.telegram.org/bot{TELEGRAM_BOT_TOKEN}/sendMessage"
    params = {
        "chat_id": TELEGRAM_CHAT_ID,
        "text": message,
        "parse_mode": "HTML"
    }

    requests.get(url, params)