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backend/app/config.py

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+from pathlib import Path
+import os
+
+from dotenv import load_dotenv
+
+
+BASE_DIR = Path(__file__).resolve().parent.parent
+PROJECT_ROOT = BASE_DIR.parent
+ENV_FILE = PROJECT_ROOT / ".env"
+
+load_dotenv(ENV_FILE)
+
+
+class Settings:
+    def __init__(self) -> None:
+        self.app_name = os.getenv("APP_NAME", "Clinica Veterinaria Formiginese API")
+        self.app_env = os.getenv("APP_ENV", "development")
+        self.app_host = os.getenv("APP_HOST", "127.0.0.1")
+        self.app_port = int(os.getenv("APP_PORT", "8000"))
+        default_sqlite_path = (PROJECT_ROOT / "data" / "clinica.db").resolve()
+        self.database_url = os.getenv("DATABASE_URL", f"sqlite:///{default_sqlite_path.as_posix()}")
+
+    @property
+    def sqlite_file_path(self) -> str | None:
+        sqlite_prefix = "sqlite:///"
+        if self.database_url.startswith(sqlite_prefix):
+            return self.database_url.removeprefix(sqlite_prefix)
+        return None
+
+
+settings = Settings()