Fix sim output

src/primaite/simulator/__init__.py

@@ -1,14 +1,26 @@
+"""Warning: SIM_OUTPUT is a mutable global variable for the simulation output directory."""
 from datetime import datetime
+from pathlib import Path
 
 from primaite import _PRIMAITE_ROOT
 
-SIM_OUTPUT = None
-"A path at the repo root dir to use temporarily for sim output testing while in dev."
-# TODO: Remove once we integrate the simulation into PrimAITE and it uses the primaite session path
+__all__ = ["SIM_OUTPUT"]
 
-if not SIM_OUTPUT:
-    session_timestamp = datetime.now()
-    date_dir = session_timestamp.strftime("%Y-%m-%d")
-    sim_path = session_timestamp.strftime("%Y-%m-%d_%H-%M-%S")
-    SIM_OUTPUT = _PRIMAITE_ROOT.parent.parent / "simulation_output" / date_dir / sim_path
-    SIM_OUTPUT.mkdir(exist_ok=True, parents=True)
+
+class __SimOutput:
+    def __init__(self):
+        self._path: Path = (
+            _PRIMAITE_ROOT.parent.parent / "simulation_output" / datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
+        )
+
+    @property
+    def path(self) -> Path:
+        return self._path
+
+    @path.setter
+    def path(self, new_path: Path) -> None:
+        self._path = new_path
+        self._path.mkdir(exist_ok=True, parents=True)
+
+
+SIM_OUTPUT = __SimOutput()