from datetime import datetime, timedelta
from typing import Any, Optional, Union

from jose import jwt
from passlib.context import CryptContext

from app.core.config import settings

# 密码上下文
pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")

# 验证密码
def verify_password(plain_password: str, hashed_password: str) -> bool:
    return pwd_context.verify(plain_password, hashed_password)

# 获取密码哈希
def get_password_hash(password: str) -> str:
    return pwd_context.hash(password)

# 创建访问令牌
def create_access_token(
    subject: Union[str, Any], expires_delta: Optional[timedelta] = None
) -> str:
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(
            minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES
        )
    to_encode = {"exp": expire, "sub": str(subject)}
    encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
    return encoded_jwt

# 创建刷新令牌
def create_refresh_token(
    subject: Union[str, Any], expires_delta: Optional[timedelta] = None
) -> str:
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(
            minutes=settings.REFRESH_TOKEN_EXPIRE_MINUTES
        )
    to_encode = {"exp": expire, "sub": str(subject), "type": "refresh"}
    encoded_jwt = jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
    return encoded_jwt