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import streamlit as st
from config import SERVER_CONFIG
import uuid
import json
import os
from services.logging_service import get_logger
from services.mcp_service import connect_to_mcp_servers
# Session state initialization
def init_session():
defaults = {
"params": {},
"current_chat_id": None,
"current_chat_index": 0,
"history_chats": get_history(),
"messages": [],
"client": None,
"agent": None,
"tools": [],
"tool_executions": [],
"servers": SERVER_CONFIG['mcpServers'],
"auto_connect_attempted": False
}
for key, val in defaults.items():
if key not in st.session_state:
st.session_state[key] = val
def auto_connect_to_mcp():
"""Automatically connect to MCP servers on first page load"""
try:
logger = get_logger()
logger.log_system_status("Auto-connecting to MCP servers on first load")
# Check if params are configured before attempting connection
params = st.session_state.get('params', {})
if not params.get('model_id') or not params.get('temperature'):
logger.log_system_status("Skipping auto-connect: LLM parameters not configured yet")
st.session_state["auto_connect_attempted"] = True
return
# Attempt to connect to MCP servers
connect_to_mcp_servers()
# Mark auto-connect as attempted
st.session_state["auto_connect_attempted"] = True
# Log successful connection
if st.session_state.get("agent"):
logger.log_system_status("Successfully auto-connected to MCP servers", {
'servers_count': len(st.session_state.servers),
'tools_count': len(st.session_state.tools)
})
else:
logger.log_system_status("Auto-connect attempted but no agent available")
except Exception as e:
# Log connection error but don't fail the app
logger = get_logger()
logger.log_error(
"Auto_MCP_Connection_Error",
str(e),
{'servers': list(st.session_state.servers.keys())}
)
logger.log_system_status(f"Auto-connect failed: {str(e)}")
# Mark as attempted even if failed
st.session_state["auto_connect_attempted"] = True
def load_example_chats():
"""Load example chat histories from JSON files"""
example_chats = []
# Define example chat files
example_files = [
{
"file": "chat_Bio_QA_mcp_agent_20250908_122027.json",
"display_name": "Bio QA Example: What is DNA?"
},
{
"file": "chat_Review_mcp_agent_20250908_121128.json",
"display_name": "Review Example: AML Risk Stratification"
}
]
# Get the directory of this file
current_dir = os.path.dirname(os.path.abspath(__file__))
chat_history_dir = os.path.join(current_dir, "..", "chat_history")
for example in example_files:
file_path = os.path.join(chat_history_dir, example["file"])
if os.path.exists(file_path):
try:
with open(file_path, 'r', encoding='utf-8') as f:
chat_data = json.load(f)
# Update the chat name for display
chat_data['chat_name'] = example["display_name"]
example_chats.append(chat_data)
except Exception as e:
logger = get_logger()
logger.log_error("LoadExampleChat", str(e), {"file": example["file"]})
return example_chats
def get_history():
if "history_chats" in st.session_state and st.session_state["history_chats"]:
return st.session_state["history_chats"]
else:
# Load example chats first
example_chats = load_example_chats()
# Create a new chat
chat_id = str(uuid.uuid4())
new_chat = {'chat_id': chat_id,
'chat_name': 'New chat',
'messages': []}
# Combine example chats with new chat
all_chats = example_chats + [new_chat]
st.session_state["current_chat_index"] = 0 # Select the new chat (after reversal in sidebar)
st.session_state["current_chat_id"] = chat_id
return all_chats
def get_current_chat(chat_id):
"""Get messages for the current chat."""
for chat in st.session_state["history_chats"]:
if chat['chat_id'] == chat_id:
return chat['messages']
return []
def _append_message_to_session(msg: dict) -> None:
"""
Append *msg* to the current chat’s message list **and**
keep history_chats in-sync.
"""
chat_id = st.session_state["current_chat_id"]
st.session_state["messages"].append(msg)
for chat in st.session_state["history_chats"]:
if chat["chat_id"] == chat_id:
chat["messages"] = st.session_state["messages"] # same list
if chat["chat_name"] == "New chat": # rename once
chat["chat_name"] = " ".join(msg["content"].split()[:5]) or "Empty"
break
def create_chat():
"""Create a new chat session."""
logger = get_logger()
chat_id = str(uuid.uuid4())
new_chat = {'chat_id': chat_id,
'chat_name': 'New chat',
'messages': []}
st.session_state["history_chats"].append(new_chat)
st.session_state["current_chat_index"] = 0
st.session_state["current_chat_id"] = chat_id
# Log chat creation
logger.log_user_action("create_chat", {
'chat_id': chat_id,
'total_chats': len(st.session_state["history_chats"])
})
return new_chat
def delete_chat(chat_id: str):
"""Delete a chat from history."""
if not chat_id: # protection against accidental call
return
logger = get_logger()
# Log chat deletion
chat_to_delete = None
for chat in st.session_state["history_chats"]:
if chat["chat_id"] == chat_id:
chat_to_delete = chat
break
if chat_to_delete:
logger.log_user_action("delete_chat", {
'chat_id': chat_id,
'chat_name': chat_to_delete.get('chat_name'),
'messages_count': len(chat_to_delete.get('messages', []))
})
# 1) Remove from session_state.history_chats
st.session_state["history_chats"] = [
c for c in st.session_state["history_chats"]
if c["chat_id"] != chat_id
]
# 2) Switch current_chat to another one or create new
if st.session_state["current_chat_id"] == chat_id:
if st.session_state["history_chats"]: # if chats still exist
first = st.session_state["history_chats"][0]
st.session_state["current_chat_id"] = first["chat_id"]
st.session_state["current_chat_index"] = 0
st.session_state["messages"] = first["messages"]
else: # if all deleted → new empty
new_chat = create_chat()
st.session_state["messages"] = new_chat["messages"]
return |