from __future__ import annotations

from enum import Enum
from typing import Optional

from jose.constants import ALGORITHMS
from passlib.context import CryptContext
from peewee import Database, SqliteDatabase
from pydantic import BaseModel, Field

DB = SqliteDatabase("tmp/vpn.db")
PRODUCTION_MODE = False

# to get a string like this run:
# openssl rand -hex 32
SECRET_KEY = "2f7875b0d2be8a76eba8077ab4d9f8b1c749e02647e9ac9e0f909c3acbfc9856"
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 30

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


class DBType(Enum):
    sqlite = "sqlite"
    mysql = "mysql"


class DBConfig(BaseModel):
    db_type: DBType = DBType.sqlite

    @property
    async def database(self) -> Database:
        if self.db_type == DBType.sqlite:
            return SqliteDatabase("tmp/vpn.db")


class JWTConfig(BaseModel):
    secret: Optional[str] = None
    hash_algorithm: str = ALGORITHMS.HS256
    expiry_minutes: int = 30


class CryptoConfig(BaseModel):
    schemes: list[str] = ["bcrypt"]

    @property
    async def cryptContext(self) -> CryptContext:
        return CryptContext(schemes=self.schemes, deprecated="auto")


class BaseConfig(BaseModel):
    db: DBConfig = Field(default_factory=DBConfig)
    jwt: JWTConfig = Field(default_factory=JWTConfig)
    crypto: CryptoConfig = Field(default_factory=CryptoConfig)