safer env vars config validation, initialization gate for network node add

Author: lukvmil

src/koi_net/config/loader.py

@@ -1,3 +1,4 @@
+import inspect
 from contextlib import contextmanager
 from pathlib import Path
 from typing import Generic, TypeVar
@@ -45,10 +46,10 @@ def mutate(self):
 
     def validate_env_vars(self):
         for field in self.schema.model_fields.values():
-            field_class = field.annotation
-            if issubclass(field_class, EnvConfig):
+            field_type = field.annotation
+            if inspect.isclass(field_type) and issubclass(field_type, EnvConfig):
                 try:
-                    field_class()
+                    field_type()
                 except ValidationError as exc:
                     missing_vars = [
                         err["loc"][0].upper()

src/koi_net/interface/module.py

@@ -34,11 +34,11 @@ def resolve_ref(self, module_ref) -> str:
 
     def load_class(self, module_name: str, reload_module: bool = False):
         if module_name not in self.module_map:
-            print(f"loading module {module_name}")
+            print(f"Loading module '{module_name}'...")
             module = importlib.import_module(module_name + MODULE_CORE)
             self.module_map[module_name] = module
         elif reload_module:
-            print(f"reloading module {module_name}")
+            print(f"Reloading module '{module_name}'...")
             module = importlib.reload(self.module_map[module_name])
             self.module_map[module_name] = module
         else:

src/koi_net/interface/network.py

@@ -35,6 +35,7 @@ def load_nodes(self) -> list[NodeInterface]:
             self.nodes.append(node)
 
             if node.exists():
+                print(f"Loading node '{node.name}'...")
                 node.init()
 
     def resolve_node(self, name: str) -> NodeInterface | None:

src/koi_net/interface/node.py

@@ -81,6 +81,8 @@ def init(self):
                         renderable=text, 
                         title="Cannot initialize node, missing the following enironment variables:",
                         border_style="red"))
+            except Exception as err:
+                print(err)
 
     def state(self):
         return self.node.get_state()

src/koi_net/interface/shell.py

@@ -158,8 +158,9 @@ def node_add(self, module_ref: str, name: str | None = None):
 
         if not node.exists():
             node.create()
-            
-        self.network.add_node(node)
+        
+        if node.initialized:
+            self.network.add_node(node)
 
     @load_node
     def node_rm(self, node: NodeInterface):