feat: chatbot

backend/routers/ai_chat.py

@@ -0,0 +1,60 @@
+"""
+Free-form, read-only chat with GPT-4o about the current cockpit state.
+No function-calling — this endpoint can never trigger an action.
+"""
+from typing import List, Optional
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel
+
+from services.ai_chat_context import CONTEXT_BLOCKS
+
+router = APIRouter(prefix="/api/ai-chat", tags=["ai-chat"])
+
+
+class ChatMessageBody(BaseModel):
+    session_id: str
+    message: str
+    enabled_blocks: Optional[List[str]] = None
+    refresh_context: bool = False
+
+
+class ClearBody(BaseModel):
+    session_id: str
+
+
+@router.get("/blocks")
+def list_context_blocks():
+    """Static list of context block keys the frontend can offer as toggles."""
+    return {"blocks": CONTEXT_BLOCKS}
+
+
+@router.post("/")
+def send_message(body: ChatMessageBody):
+    from services.ai_chat import send_chat_message
+    if not body.message.strip():
+        raise HTTPException(400, "Message vide.")
+    try:
+        return send_chat_message(
+            session_id=body.session_id,
+            message=body.message.strip(),
+            enabled_blocks=body.enabled_blocks,
+            refresh_context=body.refresh_context,
+        )
+    except RuntimeError as exc:
+        raise HTTPException(400, str(exc)) from exc
+
+
+@router.get("/history")
+def get_history(session_id: str):
+    from services.database import get_chat_messages
+    return {"messages": get_chat_messages(session_id)}
+
+
+@router.post("/clear")
+def clear_session(body: ClearBody):
+    from services.database import clear_chat_session
+    from services.ai_chat_context import clear_context_cache
+    clear_chat_session(body.session_id)
+    clear_context_cache(body.session_id)
+    return {"cleared": body.session_id}