import os
import streamlit as st
from PIL import Image as PILImage
from PIL import Image as pilImage
import base64
import io
import chromadb
from initate import process_pdf
from utils.llm_ag import intiate_convo
from utils.doi import process_image_and_get_description

path = "mm_vdb2"
client = chromadb.PersistentClient(path=path)
import streamlit as st
from PIL import Image as PILImage

def add_background_image(image_path):
    with open(image_path, "rb") as image_file:
        base64_image = base64.b64encode(image_file.read()).decode()
    css = f"""
    <style>
    .stApp {{
        background-image: url("data:image/png;base64,{base64_image}");
        background-size: cover;
        background-repeat: no-repeat;
        background-attachment: fixed;
    }}
    </style>
    """
    st.markdown(css, unsafe_allow_html=True)

# Call the function with your image path


def display_images(image_collection, query_text, max_distance=None, debug=False):
    """
    Display images in a Streamlit app based on a query.

    Args:
        image_collection: The image collection object for querying.
        query_text (str): The text query for images.
        max_distance (float, optional): Maximum allowable distance for filtering.
        debug (bool, optional): Whether to print debug information.
    """
    results = image_collection.query(
        query_texts=[query_text],
        n_results=10,
        include=['uris', 'distances']
    )

    uris = results['uris'][0]
    distances = results['distances'][0]

    # Combine uris and distances, then sort by URI in ascending order
    sorted_results = sorted(zip(uris, distances), key=lambda x: x[0])

    # Filter and display images
    for uri, distance in sorted_results:
        if max_distance is None or distance <= max_distance:
            if debug:
                st.write(f"URI: {uri} - Distance: {distance}")
            try:
                img = PILImage.open(uri)
                st.image(img, width=300)
            except Exception as e:
                st.error(f"Error loading image {uri}: {e}")
        else:
            if debug:
                st.write(f"URI: {uri} - Distance: {distance} (Filtered out)")

            

def display_videos_streamlit(video_collection, query_text, max_distance=None, max_results=5, debug=False):
    """
    Display videos in a Streamlit app based on a query.

    Args:
        video_collection: The video collection object for querying.
        query_text (str): The text query for videos.
        max_distance (float, optional): Maximum allowable distance for filtering.
        max_results (int, optional): Maximum number of results to display.
        debug (bool, optional): Whether to print debug information.
    """
    # Deduplication set
    displayed_videos = set()

    # Query the video collection with the specified text
    results = video_collection.query(
        query_texts=[query_text],
        n_results=max_results,  # Adjust the number of results if needed
        include=['uris', 'distances', 'metadatas']
    )

    # Extract URIs, distances, and metadatas from the result
    uris = results['uris'][0]
    distances = results['distances'][0]
    metadatas = results['metadatas'][0]

    # Display the videos that meet the distance criteria
    for uri, distance, metadata in zip(uris, distances, metadatas):
        video_uri = metadata['video_uri']

        # Check if a max_distance filter is applied and the distance is within the allowed range
        if (max_distance is None or distance <= max_distance) and video_uri not in displayed_videos:
            if debug:
                st.write(f"URI: {uri} - Video URI: {video_uri} - Distance: {distance}")
            st.video(video_uri)  # Display video in Streamlit
            displayed_videos.add(video_uri)  # Add to the set to prevent duplication
        else:
            if debug:
                st.write(f"URI: {uri} - Video URI: {video_uri} - Distance: {distance} (Filtered out)")
                
                
def image_uris(image_collection,query_text, max_distance=None, max_results=5):
    results = image_collection.query(
        query_texts=[query_text],
        n_results=max_results,
        include=['uris', 'distances']
    )

    filtered_uris = []
    for uri, distance in zip(results['uris'][0], results['distances'][0]):
        if max_distance is None or distance <= max_distance:
            filtered_uris.append(uri)

    return filtered_uris

def text_uris(text_collection,query_text, max_distance=None, max_results=5):
    results = text_collection.query(
        query_texts=[query_text],
        n_results=max_results,
        include=['documents', 'distances']
    )

    filtered_texts = []
    for doc, distance in zip(results['documents'][0], results['distances'][0]):
        if max_distance is None or distance <= max_distance:
            filtered_texts.append(doc)

    return filtered_texts

def frame_uris(video_collection,query_text, max_distance=None, max_results=5):
    results = video_collection.query(
        query_texts=[query_text],
        n_results=max_results,
        include=['uris', 'distances']
    )

    filtered_uris = []
    seen_folders = set()

    for uri, distance in zip(results['uris'][0], results['distances'][0]):
        if max_distance is None or distance <= max_distance:
            folder = os.path.dirname(uri)
            if folder not in seen_folders:
                filtered_uris.append(uri)
                seen_folders.add(folder)

        if len(filtered_uris) == max_results:
            break

    return filtered_uris

def image_uris2(image_collection2,query_text, max_distance=None, max_results=5):
    results = image_collection2.query(
        query_texts=[query_text],
        n_results=max_results,
        include=['uris', 'distances']
    )

    filtered_uris = []
    for uri, distance in zip(results['uris'][0], results['distances'][0]):
        if max_distance is None or distance <= max_distance:
            filtered_uris.append(uri)

    return filtered_uris


def format_prompt_inputs(image_collection, text_collection, video_collection, user_query):
    frame_candidates = frame_uris(video_collection, user_query, max_distance=1.55)
    image_candidates = image_uris(image_collection, user_query, max_distance=1.5)
    texts = text_uris(text_collection, user_query, max_distance=1.3)

    inputs = {"query": user_query, "texts": texts}
    frame = frame_candidates[0] if frame_candidates else ""
    inputs["frame"] = frame

    if image_candidates:
        image = image_candidates[0]
        with PILImage.open(image) as img:
            img = img.resize((img.width // 6, img.height // 6))
            img = img.convert("L")
            with io.BytesIO() as output:
                img.save(output, format="JPEG", quality=60)
                compressed_image_data = output.getvalue()

        inputs["image_data_1"] = base64.b64encode(compressed_image_data).decode('utf-8')
    else:
        inputs["image_data_1"] = ""

    return inputs

import time  # To simulate delays during processing

def page_1():
    add_background_image("bg.png")
    #st.set_page_config(layout='wide', page_title="Virtual Tutor")
    st.markdown("""
        <svg width="600" height="100">
            <text x="50%" y="50%" font-family="San serif" font-size="42px" fill="Black" text-anchor="middle" stroke="white"
             stroke-width="0.3" stroke-linejoin="round">ADMIN - UPLOAD
            </text>
        </svg>
    """, unsafe_allow_html=True)
    
    uploaded_file = st.file_uploader("Upload a PDF file", type=["pdf"])
    if uploaded_file:
        pdf_path = f"/tmp/{uploaded_file.name}"
        with open(pdf_path, "wb") as f:
            f.write(uploaded_file.getbuffer())

        # Display a spinner while processing
        with st.spinner("Processing PDF... Please wait."):
            try:
                # Simulate processing stages with a delay (this is just an example)
                time.sleep(1)  # Simulate a step in the processing

                # Step 1: Process images, texts, and videos
                st.text("Extracting content from PDF...")
                image_collection, text_collection, video_collection = process_pdf(pdf_path)
                st.session_state.image_collection = image_collection
                st.session_state.text_collection = text_collection
                st.session_state.video_collection = video_collection

                # Simulate a delay for finalizing (if needed)
                time.sleep(1)  # Simulate final step

                st.success("PDF processed successfully! Collections saved to session state.")
            except Exception as e:
                st.error(f"Error processing PDF: {e}")

def page_2():
    add_background_image("bg2.jpg")
    st.markdown("""
        <svg width="600" height="100">
            <text x="50%" y="50%" font-family="San serif" font-size="42px" fill="Black" text-anchor="middle" stroke="white"
             stroke-width="0.3" stroke-linejoin="round">Poss Assistant
            </text>
        </svg>
    """, unsafe_allow_html=True)

    if "image_collection" in st.session_state and "text_collection" in st.session_state and "video_collection" in st.session_state:
        image_collection = st.session_state.image_collection
        text_collection = st.session_state.text_collection
        video_collection = st.session_state.video_collection
        st.success("Collections loaded successfully.")

        query = st.text_input("Enter your query", value="Example Query")
        if query:
            inputs = format_prompt_inputs(image_collection, text_collection, video_collection, query)
            texts = inputs["texts"]
            image_data_1 = inputs["image_data_1"]

            if image_data_1:
                image_data_1 = process_image_and_get_description(image_data_1)

            response = intiate_convo(query, image_data_1, texts)
            # Display the response in Markdown format
            st.markdown("### Assistant's Response")
            st.markdown(f"```markdown\n{response}\n```")

            st.markdown("### Images")
            display_images(image_collection, query, max_distance=1.55, debug=True)

            st.markdown("### Videos")
            frame = inputs["frame"]
            if frame:
                directory_name = frame.split('/')[1] 
                video_path = f"videos_flattened/{directory_name}.mp4"
                if os.path.exists(video_path):
                    st.video(video_path)
                else:
                    st.write("No related videos found.")
    else:
        st.error("Collections not found in session state. Please process the PDF on Page 1.")

# --- Navigation ---

PAGES = {
    "Upload and Process PDF": page_1,
    "Query and Use Processed Collections": page_2
}

# Select page
selected_page = st.sidebar.selectbox("Choose a page", options=list(PAGES.keys()))

# Render selected page
PAGES[selected_page]()