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import os
import tempfile
import streamlit as st
from streamlit_chat import message
from rag import ChatPDF

title = "Simulateur IA Grandes cultures"
subtitle = "Poser vos questions"
description = "Demonstrateur GC"
LOGO = "images/agir.png"
form_help ="Vous pouvez compléter les informations ci-dessous pour personnaliser votre expérience"
placeholder = (
    "Vous pouvez me posez une question sur vos attentes, appuyer sur Entrée pour valider"
)
placeholder_doc = (
    "Vous pouvez charger un grand livre ou des écritures comptables au format PDF"
)
placeholder_url = "Récupérer les données de ce lien."

# st.title(title)

st.set_page_config(page_title=title)

def display_messages():
    st.subheader(subtitle)
    for i, (msg, is_user) in enumerate(st.session_state["messages"]):
        message(msg, is_user=is_user, key=str(i))
    st.session_state["thinking_spinner"] = st.empty()


def process_input():
    if st.session_state["user_input"] and len(st.session_state["user_input"].strip()) > 0:
        user_text = st.session_state["user_input"].strip()
        with st.session_state["thinking_spinner"], st.spinner(f"Je réfléchis"):
            agent_text = st.session_state["assistant"].ask(user_text)

        st.session_state["messages"].append((user_text, True))
        st.session_state["messages"].append((agent_text, False))


def read_and_save_file():
    st.session_state["assistant"].clear()
    st.session_state["messages"] = []
    st.session_state["user_input"] = ""

    for file in st.session_state["file_uploader"]:
        with tempfile.NamedTemporaryFile(delete=False) as tf:
            tf.write(file.getbuffer())
            file_path = tf.name

        with st.session_state["ingestion_spinner"], st.spinner(f"Chargement {file.name}"):
            st.session_state["assistant"].ingest(file_path)
        os.remove(file_path)


def page():
    if len(st.session_state) == 0:
        st.session_state["messages"] = []
        st.session_state["assistant"] = ChatPDF()

    
    st.logo(LOGO)
    st.sidebar.markdown(form_help)
    info1 = st.sidebar.text_input("Info 1", type="default")
    info1 = st.sidebar.text_input("Info 2", type="default")
    info1 = st.sidebar.text_input("Info 3", type="default")

    st.header(title)

    st.subheader("Charger un ou plusieurs documents")
    st.caption(placeholder_doc)
    st.file_uploader(
        "Charger un document",
        type=["pdf"],
        key="file_uploader",
        on_change=read_and_save_file,
        label_visibility="collapsed",
        accept_multiple_files=True,
    )

    st.session_state["ingestion_spinner"] = st.empty()

    display_messages()
    st.caption(placeholder)
    st.text_input("Message", key="user_input", on_change=process_input)


if __name__ == "__main__":
    page()