from fastapi import APIRouter

from database import session
from pyowm import OWM

from app.models.auto import Auto_Delivery, Auto_Temp


router = APIRouter(
    prefix="/main",
    tags=["main"],
    responses={404: {"description": "Not found"}},
)



@router.route("/update", methods=["GET"])
def update_auto_customers():
    
    
    today_temp = session\
        .query(Auto_Temp)\
        .order_by(Auto_Temp.id.desc())\
        .first()
        
    # get all automatic customers
    auto_customers = session\
        .query(Auto_Delivery)\
        .order_by(Auto_Delivery.last_updated.desc())\
        .limit(25)
        
    for f in auto_customers:
        
        # figure out how much temperature effects oil
        if today_temp >= 60:
            use_day = 1
        elif 40 >= today_temp >= 59:
            use_day = 3
        elif 30 >= today_temp >= 39:
            use_day = 5
        elif 0 >= today_temp >= 29:
            use_day = 7
        elif -20 >= today_temp >= -1:
            use_day = 10
        else:
            use_day = 0

        # times temp factory by house factor
        gallon_use_today = f.house_factor * use_day

        # get estimated gallons left
        get_gallons_left = f.estimated_gallons_left_prev_day - gallon_use_today
        
        # get previous day gallons left
        f.estimated_gallons_left_prev_day  = f.estimated_gallons_left  + gallon_use_today

        f.estimated_gallons_left = get_gallons_left

        session.add(f)
        session.commit()
        
    
    return ({"ok": True}), 200


@router.get("/temp")
def update_temp():
    
    temps = []
    
    owm = OWM('21648d8c8d1a4ae495ace0b7810b4d36')
    mgr = owm.weather_manager()

    # Search for current weather in London (Great Britain) and get details
    observation = mgr.weather_at_place('Worcester, US')
    w = observation.weather

    temp_dict_fahrenheit = w.temperature()   # a dict in Kelvin units (default when no temperature units provided)
    temp_dict_fahrenheit['temp_min']
    temp_dict_fahrenheit['temp_max']
    temp_dict_fahrenheit = w.temperature('fahrenheit')
    
    low_temp = temp_dict_fahrenheit['temp_min']
    high_temp = temp_dict_fahrenheit['temp_max']
    temps.append(temp_dict_fahrenheit['temp_max'])
    temps.append(temp_dict_fahrenheit['temp_min'])
    
    get_avg = Average(temps)
    rounded_temp = round(get_avg)
    
    dday = (65 - ((low_temp + high_temp) /2))

    add_new_temp = Auto_Temp(
        temp = temp_dict_fahrenheit['temp'],
        temp_max = temp_dict_fahrenheit['temp_max'],
        temp_min = temp_dict_fahrenheit['temp_min'],
        temp_avg = rounded_temp,
        degree_day = dday
    )
    
    session.add(add_new_temp)
    session.commit()
        
    
    return ({"ok": True}), 200


def Average(lst): 
    return sum(lst) / len(lst)