from fastapi import HTTPException
from ..db import get_connection
from ..utils.jwt_handler import verify_token
import hashlib

def apply_coupons(base_price: float, coupon_id: int, duration: float) -> float:
    if not coupon_id:
        return base_price
        connection = get_connection()
    if not connection:
            raise HTTPException(status_code=500, detail="Database connection failed!")


    cursor = connection.cursor(dictionary=True)
    cursor.execute("""
        SELECT discount_type, discount_amount 
        FROM coupons 
        WHERE coupon_id = %s
    """, (coupon_id,))
    coupon = cursor.fetchone()

    if coupon['discount_type'] == 'percentage':
        return base_price * (1 - coupon['discount_amount']/100)
    elif coupon['discount_type'] == 'fixed':
        return max(base_price - coupon['discount_amount'], 0)
    elif coupon['discount_type'] == 'time':
        return base_price * (duration - coupon['discount_amount'])/duration
    return base_price