# 运行方式：
# 1. 安装必要的包：pip install streamlit-option-menu streamlit-chatbox>=1.1.6
# 2. 运行本机fastchat服务：python server\llm_api.py 或者 运行对应的sh文件
# 3. 运行API服务器：python server/api.py。如果使用api = ApiRequest(no_remote_api=True)，该步可以跳过。
# 4. 运行WEB UI：streamlit run webui.py --server.port 7860

import streamlit as st
from webui_pages.utils import *
from streamlit_option_menu import option_menu
from webui_pages import *

api = ApiRequest(base_url="http://127.0.0.1:7861", no_remote_api=False)

if __name__ == "__main__":
    st.set_page_config("langchain-chatglm WebUI", initial_sidebar_state="expanded")

    if not chat_box.chat_inited:
        st.toast(
            f"欢迎使用 [`Langchain-Chatglm`](https://github.com/chatchat-space/langchain-chatglm) ! \n\n"
            f"当前使用模型`{LLM_MODEL}`, 您可以开始提问了."
        )

    if "chat_list" not in st.session_state:
        st.session_state["chat_list"] = {"对话1": {"need_rename": True, "chat_no": 1}}
    if "cur_chat_name" not in st.session_state:
        st.session_state["cur_chat_name"] = list(st.session_state["chat_list"].keys())[0]
    if "need_chat_name" not in st.session_state:
        st.session_state["need_chat_name"] = True
    if "chat_count" not in st.session_state:
        st.session_state["chat_count"] = 1

    chat_list = [{"name": k, "chat_no": v.get("chat_no", 0)} for k, v in st.session_state.chat_list.items()]
    chat_list = [x["name"] for x in sorted(chat_list, key=lambda x: x["chat_no"])]
    pages1 = {i: {
        "icon": "chat",
        "func": dialogue_page,
    } for i in chat_list}

    pages2 = {
        "新建对话": {
            "icon": "plus-circle",
            "func": dialogue_page,
        },
        "---": {
            "icon": None,
            "func": None
        },
        "知识库管理": {
            "icon": "hdd-stack",
            "func": knowledge_base_page,
        },
    }
    pages = {**pages1, **pages2}
        
    with st.sidebar:
        options = chat_list + list(pages2)
        icons = ["chat"] * len(chat_list) + [x["icon"] for x in pages2.values()]

        default_index = list(pages).index(st.session_state["cur_chat_name"])
        selected_page = option_menu(
            "langchain-chatglm",
            options=options,
            icons=icons,
            menu_icon="chat-quote",
            default_index=default_index,
        )

    if selected_page == "新建对话":
        cur_chat_name = st.session_state.get("cur_chat_name")
        if (not st.session_state.get("create_chat")
            and not st.session_state.get("renamde_chat")
            and not st.session_state.get("delete_chat")):
            st.session_state.chat_count += 1
            chat_no = st.session_state.chat_count
            new_chat_name = f"对话{chat_no}"
            st.session_state.chat_list[new_chat_name] = {"need_rename": True, "chat_no": chat_no}
            st.session_state["cur_chat_name"] = new_chat_name
            st.experimental_rerun()
        else:
            if st.session_state.get("create_chat"):
                st.session_state.create_chat = False
            if st.session_state.get("renamde_chat"):
                st.session_state.renamde_chat = False
                st.experimental_rerun()
            if st.session_state.get("delete_chat"):
                st.session_state.delete_chat = False
                st.experimental_rerun()
    elif selected_page in st.session_state.chat_list:
        st.session_state["selected_page"] = selected_page

    if selected_page in pages:
        pages[selected_page]["func"](api)