app.py

import streamlit as st
from text2sql import ChatBot
from transformers import (
    AutoTokenizer,
    AutoModelForSequenceClassification,
    logging as hf_logging
)
from langdetect import detect
from utils.translate_utils import translate_zh_to_en
from utils.db_utils import add_a_record
from langdetect.lang_detect_exception import LangDetectException
import os

# -------- Streamlit Web Application --------
text2sql_bot = ChatBot()
baidu_api_token = None  # Your Baidu API token (if needed for translation)

# Define some database schemas for demonstration purposes
db_schemas = {
    "singer": """
    CREATE TABLE "singer" (
        "Singer_ID" int,
        "Name" text,
        "Birth_Year" real,
        "Net_Worth_Millions" real,
        "Citizenship" text,
        PRIMARY KEY ("Singer_ID")
    );

    CREATE TABLE "song" (
        "Song_ID" int,
        "Title" text,
        "Singer_ID" int,
        "Sales" real,
        "Highest_Position" real,
        PRIMARY KEY ("Song_ID"),
        FOREIGN KEY ("Singer_ID") REFERENCES "singer"("Singer_ID")
    );
    """,
    # More schemas can be added here
}

# Streamlit interface
st.title("Text-to-SQL Chatbot")
st.sidebar.header("Select a Database")
selected_db = st.sidebar.selectbox("Choose a database:", list(db_schemas.keys()))
st.sidebar.text_area("Database Schema", db_schemas[selected_db], height=600)

# Get user input for the question
question = st.text_input("Enter your question:")
db_id = selected_db

if question:
    # Store the question in the database (or perform any additional processing)
    add_a_record(question, db_id)

    try:
        # If translation is required, handle it here
        if baidu_api_token and detect(question) != "en":
            question = translate_zh_to_en(question, baidu_api_token)
    except LangDetectException as e:
        st.warning(f"Language detection error: {e}")

    # Get the model's response (in this case, SQL query or logits)
    response = text2sql_bot.get_response(question, db_id)
    st.write(f"**Database:** {db_id}")
    st.write(f"**Results:** {response}")