Update config.py with tests

src/config.py

@@ -1,7 +1,45 @@
-import os
+from __future__ import annotations
 
-from dotenv import load_dotenv
+import os
+from pathlib import Path
+from typing import TYPE_CHECKING, ClassVar
+
+from dotenv import dotenv_values, load_dotenv, set_key, unset_key
+
+if TYPE_CHECKING:
+    from collections import OrderedDict
+
+config_path = Path(__file__).parent.resolve()
+DOT_ENV_PATH = Path(config_path, ".env")
+DOT_ENV_PATH.touch(mode=0o600, exist_ok=True)
 
 load_dotenv()
 
+VERSION = "1.5"
 NOTION_TOKEN = os.getenv("NOTION_TOKEN")
+
+
+class Config:
+    env_dict: ClassVar[OrderedDict[str, str]] = {}
+    dot_env_path = DOT_ENV_PATH
+
+    @staticmethod
+    def init(dotenv_path: str = DOT_ENV_PATH) -> None:
+        Config.dot_env_path = dotenv_path
+        Config.env_dict = dotenv_values(dotenv_path=dotenv_path)
+
+    @staticmethod
+    def get_env(key: str) -> str | None:
+        if key in Config.env_dict:
+            return Config.env_dict[key]
+        return None
+
+    @staticmethod
+    def update_env(key: str, value: str) -> None:
+        set_key(Config.dot_env_path, key, value)
+        Config.env_dict = dotenv_values(dotenv_path=Config.dot_env_path)
+
+    @staticmethod
+    def remove_env(key: str) -> None:
+        unset_key(Config.dot_env_path, key)
+        Config.env_dict = dotenv_values(dotenv_path=Config.dot_env_path)