src/streamlit_app.py

import streamlit as st
from PIL import Image
import os
import wikipedia
import csv
from datetime import datetime

# ====== Setup ======
USERS = {}
UPLOAD_FOLDER = "/tmp/uploads"
MEDIA_FOLDER = os.path.join(UPLOAD_FOLDER, "feedback_media")
FEEDBACK_FILE = os.path.join(UPLOAD_FOLDER, "feedback.csv")

os.makedirs(UPLOAD_FOLDER, exist_ok=True)
os.makedirs(MEDIA_FOLDER, exist_ok=True)

STATES = {
    "Telangana": ["Hyderabad", "Warangal", "Nizamabad", "Karimnagar", "Khammam"],
    "Maharashtra": ["Mumbai", "Pune", "Nagpur", "Nashik", "Aurangabad"],
    "Tamil Nadu": ["Chennai", "Coimbatore", "Madurai", "Tiruchirappalli", "Salem"],
    "Karnataka": ["Bangalore", "Mysore", "Mangalore", "Hubli", "Belgaum"],
    "Uttar Pradesh": ["Lucknow", "Varanasi", "Agra", "Kanpur", "Allahabad"],
    "West Bengal": ["Kolkata", "Darjeeling", "Durgapur", "Siliguri", "Asansol"],
    "Rajasthan": ["Jaipur", "Udaipur", "Jodhpur", "Bikaner", "Ajmer"],
    "Gujarat": ["Ahmedabad", "Surat", "Vadodara", "Rajkot", "Bhavnagar"],
    "Andhra Pradesh": ["Visakhapatnam", "Vijayawada", "Guntur", "Tirupati", "Kurnool"],
}

for key, default in {
    "logged_in": False,
    "email": "",
    "otp_sent_to": None,
    "otp_verified": False,
    "login_email": None,
    "place_image": None,
}.items():
    if key not in st.session_state:
        st.session_state[key] = default

# ====== Helper Functions ======

def send_otp(email):
    st.session_state.otp_sent_to = email
    st.session_state.otp_verified = False
    return "1234"

def verify_otp(entered_otp):
    if st.session_state.otp_sent_to and entered_otp == "1234":
        st.session_state.logged_in = True
        st.session_state.email = st.session_state.otp_sent_to
        st.session_state.otp_verified = True
        st.session_state.login_email = None
        return True
    return False

def logout():
    for key in ["logged_in", "email", "otp_sent_to", "otp_verified", "login_email", "place_image"]:
        st.session_state[key] = False if isinstance(st.session_state.get(key), bool) else None

def fetch_wikipedia_summary(title, lang="en"):
    try:
        wikipedia.set_lang(lang)
        return wikipedia.summary(title, sentences=4)
    except wikipedia.exceptions.DisambiguationError as e:
        return f"Multiple results found for '{title}': {e.options}"
    except wikipedia.exceptions.PageError:
        return f"No Wikipedia page found for '{title}' in selected language."
    except Exception as e:
        return f"Error fetching summary: {str(e)}"

def save_temp_file(uploaded_file, filetype):
    if uploaded_file:
        filename = f"{filetype}_{datetime.now().strftime('%Y%m%d%H%M%S')}_{uploaded_file.name}"
        filepath = os.path.join(MEDIA_FOLDER, filename)
        with open(filepath, "wb") as f:
            f.write(uploaded_file.read())
        return filepath
    return ""

def save_feedback(email, place, state, district, text, img_path="", audio_path="", video_path=""):
    if not os.path.exists(FEEDBACK_FILE):
        with open(FEEDBACK_FILE, 'w', newline='', encoding='utf-8') as f:
            writer = csv.writer(f)
            writer.writerow([
                "user_email", "place_name", "state", "district", "feedback_text",
                "image_file", "audio_file", "video_file", "timestamp"
            ])

    with open(FEEDBACK_FILE, 'a', newline='', encoding='utf-8') as f:
        writer = csv.writer(f)
        writer.writerow([
            email, place, state, district, text,
            img_path, audio_path, video_path, datetime.now().isoformat()
        ])

# ====== Pages ======

def signup_page():
    st.header("🚀 Signup")
    name = st.text_input("Name")
    email = st.text_input("Email (Gmail)")
    contact = st.text_input("Contact Number")
    if st.button("Sign Up"):
        if email in USERS:
            st.error("User already exists, please login.")
        elif not email or not name:
            st.error("Please enter name and email.")
        else:
            USERS[email] = {"name": name, "email": email, "contact": contact}
            send_otp(email)
            st.success(f"User {name} registered! OTP sent to {email} (simulated). Please verify OTP on Login page.")
            st.session_state.login_email = email

def login_page():
    st.header("🔐 Login")
    email = st.text_input("Email", key="login_email_input")
    if st.button("Send OTP"):
        if email in USERS:
            send_otp(email)
            st.success(f"OTP sent to {email} (simulated). Please enter OTP below.")
            st.session_state.login_email = email
        else:
            st.error("Email not found. Please sign up first.")
    if st.session_state.login_email == email:
        otp = st.text_input("Enter OTP (use 1234 for demo)", type="password")
        if st.button("Verify OTP"):
            if verify_otp(otp):
                st.success("OTP verified! Logged in successfully.")
            else:
                st.error("Incorrect OTP or no OTP sent.")

def main_app():
    st.sidebar.success(f"Logged in as {st.session_state.email}")
    if st.sidebar.button("Logout"):
        logout()
        st.experimental_rerun()

    st.sidebar.markdown("---")
    st.sidebar.subheader("📝 Give Feedback")
    feedback_text = st.sidebar.text_area("Your thoughts about this place", height=100)
    feedback_image = st.sidebar.file_uploader("Upload an image", type=["jpg", "jpeg", "png"])
    feedback_audio = st.sidebar.file_uploader("Upload audio", type=["mp3", "wav", "m4a"])
    feedback_video = st.sidebar.file_uploader("Upload video", type=["mp4", "mov", "avi"])

    if feedback_image:
        st.sidebar.image(feedback_image, caption="Your uploaded image", use_container_width=True)
    if feedback_audio:
        st.sidebar.audio(feedback_audio, format=feedback_audio.type)
    if feedback_video:
        st.sidebar.video(feedback_video)

    st.title("📚 Gyana Vedika - Cultural Explorer")

    state = st.selectbox("Select State", list(STATES.keys()))
    district = st.selectbox("Select District", STATES[state])
    st.subheader(f"Explore {district}, {state}")

    uploaded_image = st.file_uploader("Upload a cultural/historical place image", type=["png", "jpg", "jpeg"])
    if uploaded_image:
        st.session_state["place_image"] = uploaded_image

    place_to_search = None

    if st.session_state["place_image"]:
        st.image(st.session_state["place_image"], caption="Uploaded Image", use_container_width=True)
        filename = st.session_state["place_image"].name.lower()
        keywords_map = {
            "charminar": "Charminar", "golconda": "Golconda Fort", "qutubshahi": "Qutb Shahi Tombs",
            "birla": "Birla Mandir", "salarjung": "Salar Jung Museum", "warangal": "Warangal Fort",
            "ramappa": "Ramappa Temple", "bhadrakali": "Bhadra Kali Temple", "kakatiya": "Kakatiya Kala Thoranam",
            "pakhal": "Pakhal Lake", "medak": "Medak Cathedral", "nagarjuna": "Nagarjuna Sagar Dam",
            "taj": "Taj Mahal", "gateway": "Gateway of India", "qutub": "Qutub Minar", "mysore": "Mysore Palace",
            "hampi": "Hampi", "konark": "Konark Sun Temple", "varanasi": "Varanasi", "madurai": "Meenakshi Temple",
            "ajanta": "Ajanta Caves", "ellora": "Ellora Caves",
        }
        for kw, place in keywords_map.items():
            if kw in filename:
                place_to_search = place
                st.success(f"Recognized Place: {place_to_search}")
                break
        if not place_to_search:
            st.warning("Could not recognize place. Try renaming the image file with landmark name.")

    manual_place = st.text_input("Or manually enter place name to search info")
    if manual_place.strip():
        place_to_search = manual_place.strip()

    if place_to_search:
        language = st.selectbox("Select Wikipedia summary language", ["English", "Hindi", "Telugu", "Tamil", "Marathi", "Bengali"])
        lang_codes = {"English": "en", "Hindi": "hi", "Telugu": "te", "Tamil": "ta", "Marathi": "mr", "Bengali": "bn"}
        lang_code = lang_codes.get(language, "en")
        if st.button(f"Get info about {place_to_search}"):
            with st.spinner(f"Fetching Wikipedia summary for {place_to_search}..."):
                summary = fetch_wikipedia_summary(place_to_search, lang=lang_code)
                st.markdown(f"### Summary of {place_to_search}")
                st.write(summary)

    if st.sidebar.button("Submit Feedback"):
        if feedback_text.strip():
            img_path = save_temp_file(feedback_image, "img")
            audio_path = save_temp_file(feedback_audio, "audio")
            video_path = save_temp_file(feedback_video, "video")

            save_feedback(
                email=st.session_state.email,
                place=place_to_search or "Unknown",
                state=state,
                district=district,
                text=feedback_text.strip(),
                img_path=img_path,
                audio_path=audio_path,
                video_path=video_path
            )
            st.sidebar.success("Thank you! Feedback submitted.")
        else:
            st.sidebar.warning("Please enter your feedback text.")

# ====== UI Styling ======
st.set_page_config(page_title="Gyana Vedika", layout="wide")
st.markdown("""
<style>
.stButton>button {
    background-color: #008080; color: white; font-weight: bold; border-radius: 10px;
}
.stTextInput>div>input, .stSelectbox>div>div>select, .stTextArea>div>textarea {
    border: 2px solid #008080 !important; border-radius: 8px !important;
}
h1, h2, h3, h4, h5, h6 {
    color: #004d4d;
}
</style>
""", unsafe_allow_html=True)

# ====== Main Routing ======
if not st.session_state.logged_in:
    page = st.sidebar.radio("Choose Option", ["Signup", "Login"])
    if page == "Signup":
        signup_page()
    elif page == "Login":
        login_page()
else:
    main_app()