feat: better args parsing

diceplayer/player.py

@@ -19,13 +19,16 @@ class Player:
         self._state_handler = StateHandler(config.simulation_dir)
 
     def play(self, **flags: Unpack[PlayerFlags]):
-        if not flags["continuation"]:
+        continuation = flags.get("continuation", False)
+        force = flags.get("force", False)
+
+        state: StateModel = self._state_handler.get(self.config, force=force)
+        if not continuation and state is not None:
             logger.info(
                 "Continuation flag is not set. Starting a new simulation and deleting any existing state."
             )
             self._state_handler.delete()
-
-        state = self._state_handler.get(self.config, force=flags["force"])
+            state = self._state_handler.get(self.config, force=force)
 
         if state is None:
             state = StateModel.from_config(self.config)
@@ -37,7 +40,7 @@ class Player:
                 f"Starting cycle {state.current_cycle + 1} of {self.config.max_cyc}."
             )
 
-            step_directory = self.config.simulation_dir / f"{state.current_cycle::02d}"
+            step_directory = self.config.simulation_dir / f"{state.current_cycle:02d}"
             if not step_directory.exists():
                 step_directory.mkdir(parents=True)