fix: fixed typing issues

aidial_adapter_vertexai/chat/claude/conversation_factory.py

@@ -22,8 +22,7 @@
 )
 
 ClaudePart = (
-    str
-    | TextBlockParam
+    TextBlockParam
     | ImageBlockParam
     | ToolUseBlockParam
     | ToolResultBlockParam
@@ -68,8 +67,11 @@ def create_text_part(self, text: str) -> ClaudePart:
     def create_function_call_part(
         self, name: str, args: str, *, tool_call_id: str | None = None
     ) -> ClaudePart:
+        if tool_call_id is None:
+            raise InvalidRequestError("tool_call_id field must be present")
+
         return ToolUseBlockParam(
-            id=tool_call_id or "123",  # fixme
+            id=tool_call_id,
             input=json.loads(args),
             name=name,
             type="tool_use",
@@ -78,8 +80,11 @@ def create_function_call_part(
     def create_function_result_part(
         self, name: str, args: str, *, tool_call_id: str | None = None
     ) -> ClaudePart:
+        if tool_call_id is None:
+            raise InvalidRequestError("tool_call_id field must be present")
+
         return ToolResultBlockParam(
-            tool_use_id=tool_call_id or "123",  # fixme
+            tool_use_id=tool_call_id,
             type="tool_result",
             content=[{"type": "text", "text": args}],
         )
@@ -89,9 +94,9 @@ def create_content(
     ) -> MessageParam:
         match role:
             case Role.USER | Role.FUNCTION | Role.TOOL:
-                return MessageParam(content=parts, role="user")  # type: ignore
+                return MessageParam(content=parts, role="user")
             case Role.ASSISTANT:
-                return MessageParam(content=parts, role="assistant")  # type: ignore
+                return MessageParam(content=parts, role="assistant")
             case Role.SYSTEM:
                 raise InvalidRequestError(
                     "System message is only allowed as the first message"
@@ -105,6 +110,24 @@ def create_conversation(
         contents: List[MessageParam],
     ) -> ClaudeConversation:
         return ClaudeConversation.create(
-            system_instruction,  # type: ignore # FIXME
+            _sanitize_system_instruction(system_instruction),
             contents,
         )
+
+
+def _sanitize_system_instruction(
+    parts: List[ClaudePart] | None,
+) -> List[TextBlockParam] | None:
+    if parts is None:
+        return None
+
+    ret: List[TextBlockParam] = []
+    for part in parts:
+        if isinstance(part, dict) and part["type"] == "text":
+            ret.append(part)
+        else:
+            raise InvalidRequestError(
+                "Only text parts are allowed in the system message"
+            )
+
+    return ret