# Authentication utilities
import os
import hashlib
import re
import logging
from datetime import datetime, timedelta
from bson import ObjectId

from utils.extensions import ext
from utils.config import Config

def hash_password(password: str) -> str:
    salt = os.urandom(32)
    hashed = hashlib.pbkdf2_hmac('sha256', password.encode('utf-8'), salt, 100000)
    password_hash = (salt + hashed).hex()
    return password_hash

def verify_password(stored_password: str, provided_password: str) -> bool:
    if not stored_password or not all(c in '0123456789abcdefABCDEF' for c in stored_password):
        logging.error("Định dạng mật khẩu lưu trữ không hợp lệ")
        return False
    try:
        stored_bytes = bytes.fromhex(stored_password)
        salt = stored_bytes[:32]
        stored_hash = stored_bytes[32:]
        provided_hash = hashlib.pbkdf2_hmac(
            'sha256',
            provided_password.encode('utf-8'),
            salt,
            100000
        )
        return stored_hash == provided_hash
    except ValueError as e:
        logging.error(f"Lỗi trong verify_password: {e}")
        return False

def validate_phone(phone: str) -> bool:
    return bool(re.match(r'^\+84\d{9}$|^0\d{9}$', phone))

def validate_email(email: str) -> bool:
    return bool(re.match(r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$', email))

def reset_query_count(user_id):
    try:
        user = ext.db.users.find_one({'_id': ObjectId(user_id)})
        if not user or user.get('account_type') == 'unlimited':
            return
        last_reset = user.get('last_reset')
        if last_reset and datetime.utcnow() - last_reset > timedelta(days=1):
            ext.db.users.update_one(
                {'_id': ObjectId(user_id)},
                {'$set': {'query_count': 0, 'last_reset': datetime.utcnow()}}
            )
            logging.info(f"Đã reset số lượt truy vấn cho người dùng {user_id}")
    except Exception as e:
        logging.error(f"Error resetting query count: {e}")