import hashlib
import uuid
from datetime import datetime, timedelta, timezone

import jwt
from passlib.context import CryptContext

from app.config import settings

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")


def hash_password(password: str) -> str:
    return pwd_context.hash(password)


def verify_password(plain: str, hashed: str) -> bool:
    return pwd_context.verify(plain, hashed)


def create_access_token(user_id: str, role: str, status: str) -> str:
    expire = datetime.now(timezone.utc) + timedelta(
        minutes=settings.access_token_expire_minutes
    )
    payload = {
        "sub": user_id,
        "role": role,
        "status": status,
        "exp": expire,
        "type": "access",
    }
    return jwt.encode(payload, settings.secret_key, algorithm=settings.algorithm)


def create_refresh_token() -> tuple[str, str, datetime]:
    """Returns (raw_token, hashed_token, expires_at)."""
    raw = str(uuid.uuid4())
    hashed = hashlib.sha256(raw.encode()).hexdigest()
    expires_at = datetime.now(timezone.utc) + timedelta(
        days=settings.refresh_token_expire_days
    )
    return raw, hashed, expires_at


def decode_access_token(token: str) -> dict:
    """Raises jwt.InvalidTokenError on failure."""
    payload = jwt.decode(token, settings.secret_key, algorithms=[settings.algorithm])
    if payload.get("type") != "access":
        raise jwt.InvalidTokenError("Not an access token")
    return payload


def hash_token(raw: str) -> str:
    return hashlib.sha256(raw.encode()).hexdigest()