app.py

import streamlit as st
import open_clip
import torch
import requests
from PIL import Image
from io import BytesIO
import time
import json
import numpy as np
from ultralytics import YOLO
import cv2
import chromadb

# Load CLIP model and tokenizer
@st.cache_resource
def load_clip_model():
    model, preprocess_train, preprocess_val = open_clip.create_model_and_transforms('hf-hub:Marqo/marqo-fashionSigLIP')
    tokenizer = open_clip.get_tokenizer('hf-hub:Marqo/marqo-fashionSigLIP')
    device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
    model.to(device)
    return model, preprocess_val, tokenizer, device

clip_model, preprocess_val, tokenizer, device = load_clip_model()

# Load YOLOv8 model
@st.cache_resource
def load_yolo_model():
    return YOLO("./best.pt")

yolo_model = load_yolo_model()

# Load ChromaDB
@st.cache_resource
def load_chromadb():
    client = chromadb.PersistentClient(path="./chromadb_new")
    collection = client.get_collection(name="clothes_items_musinsa_sumin")
    return collection

collection = load_chromadb()

# Helper functions
def load_image_from_url(url, max_retries=3):
    for attempt in range(max_retries):
        try:
            response = requests.get(url, timeout=10)
            response.raise_for_status()
            img = Image.open(BytesIO(response.content)).convert('RGB')
            return img
        except (requests.RequestException, Image.UnidentifiedImageError) as e:
            if attempt < max_retries - 1:
                time.sleep(1)
            else:
                return None

# get_image_embedding 함수 수정
def get_image_embedding(image):
    image_tensor = preprocess_val(image).unsqueeze(0).to(device)
    with torch.no_grad():
        image_features = clip_model.encode_image(image_tensor)
        image_features /= image_features.norm(dim=-1, keepdim=True)
    return image_features.cpu().numpy().squeeze().tolist()  # numpy 배열을 파이썬 리스트로 변환

def get_text_embedding(text):
    text_tokens = tokenizer([text]).to(device)
    with torch.no_grad():
        text_features = clip_model.encode_text(text_tokens)
        text_features /= text_features.norm(dim=-1, keepdim=True)
    return text_features.cpu().numpy()
    
def get_average_embedding(main_image_url, additional_image_urls):
    embeddings = []
    
    # 메인 이미지 임베딩
    main_image = load_image_from_url(main_image_url)
    if main_image:
        embeddings.append(get_image_embedding(main_image))
    
    # 추가 이미지 임베딩
    for url in additional_image_urls:
        img = load_image_from_url(url)
        if img:
            embeddings.append(get_image_embedding(img))
    
    if embeddings:
        avg_embedding = np.mean(embeddings, axis=0)
        return avg_embedding if isinstance(avg_embedding, np.ndarray) else avg_embedding
    else:
        return None

def update_collection_embeddings():
    all_ids = collection.get(include=['metadatas'])['ids']
    all_metadata = collection.get(include=['metadatas'])['metadatas']
    
    batch_size = 100  # 한 번에 처리할 아이템 수
    for i in range(0, len(all_ids), batch_size):
        batch_ids = all_ids[i:i+batch_size]
        batch_metadata = all_metadata[i:i+batch_size]
        
        batch_embeddings = []
        valid_ids = []
        
        for id, metadata in zip(batch_ids, batch_metadata):
            main_image_url = metadata['image_url']
            additional_image_urls = metadata.get('additional_images', [])
            
            try:
                avg_embedding = get_average_embedding(main_image_url, additional_image_urls)
                if avg_embedding is not None:
                    batch_embeddings.append(avg_embedding)
                    valid_ids.append(id)
                else:
                    st.warning(f"Failed to generate embedding for item {id}")
            except Exception as e:
                st.error(f"Error processing item {id}: {str(e)}")
        
        if valid_ids:
            try:
                collection.update(
                    ids=valid_ids,
                    embeddings=batch_embeddings
                )
                st.success(f"Updated embeddings for {len(valid_ids)} items")
            except Exception as e:
                st.error(f"Error updating embeddings: {str(e)}")
                st.error(f"First embedding type: {type(batch_embeddings[0])}")
                st.error(f"First embedding length: {len(batch_embeddings[0])}")
                st.error(f"First embedding: {batch_embeddings[0][:10]}...")  # 처음 10개 요소만 출력
        
        # 진행 상황 표시
        st.progress((i + batch_size) / len(all_ids))

        
def find_similar_images(query_embedding, collection, top_k=5):
    results = collection.query(
        query_embeddings=[query_embedding.squeeze().tolist()],
        n_results=top_k,
        include=["metadatas", "distances"]
    )
    
    similar_items = []
    for metadata, distance in zip(results['metadatas'][0], results['distances'][0]):
        similar_items.append({
            'info': metadata,
            'similarity': 1 - distance  # 거리를 유사도로 변환
        })
    
    return similar_items

def update_collection_embeddings():
    all_ids = collection.get(include=['metadatas'])['ids']
    all_metadata = collection.get(include=['metadatas'])['metadatas']
    
    for id, metadata in zip(all_ids, all_metadata):
        main_image_url = metadata['image_url']
        additional_image_urls = metadata.get('additional_images', [])
        
        avg_embedding = get_average_embedding(main_image_url, additional_image_urls)
        
        if avg_embedding is not None:
            collection.update(
                ids=[id],
                embeddings=[avg_embedding.tolist()]
            )

def detect_clothing(image):
    results = yolo_model(image)
    detections = results[0].boxes.data.cpu().numpy()
    categories = []
    for detection in detections:
        x1, y1, x2, y2, conf, cls = detection
        category = yolo_model.names[int(cls)]
        if category in ['sunglass','hat','jacket','shirt','pants','shorts','skirt','dress','bag','shoe']:
            categories.append({
                'category': category,
                'bbox': [int(x1), int(y1), int(x2), int(y2)],
                'confidence': conf
            })
    return categories

def crop_image(image, bbox):
    return image.crop((bbox[0], bbox[1], bbox[2], bbox[3]))

# 세션 상태 초기화
if 'step' not in st.session_state:
    st.session_state.step = 'input'
if 'query_image_url' not in st.session_state:
    st.session_state.query_image_url = ''
if 'detections' not in st.session_state:
    st.session_state.detections = []
if 'selected_category' not in st.session_state:
    st.session_state.selected_category = None

# Streamlit app
st.title("Advanced Fashion Search App")

# 컬렉션 임베딩 업데이트 (첫 실행 시 한 번만)
if 'embeddings_updated' not in st.session_state:
    with st.spinner("Updating collection embeddings... This may take a while."):
        update_collection_embeddings()
    st.session_state.embeddings_updated = True

# 단계별 처리
if st.session_state.step == 'input':
    st.session_state.query_image_url = st.text_input("Enter image URL:", st.session_state.query_image_url)
    if st.button("Detect Clothing"):
        if st.session_state.query_image_url:
            query_image = load_image_from_url(st.session_state.query_image_url)
            if query_image is not None:
                st.session_state.query_image = query_image
                st.session_state.detections = detect_clothing(query_image)
                if st.session_state.detections:
                    st.session_state.step = 'select_category'
                else:
                    st.warning("No clothing items detected in the image.")
            else:
                st.error("Failed to load the image. Please try another URL.")
        else:
            st.warning("Please enter an image URL.")

elif st.session_state.step == 'select_category':
    st.image(st.session_state.query_image, caption="Query Image", use_column_width=True)
    st.subheader("Detected Clothing Items:")
    
    for detection in st.session_state.detections:
        col1, col2 = st.columns([1, 3])
        with col1:
            st.write(f"{detection['category']} (Confidence: {detection['confidence']:.2f})")
        with col2:
            cropped_image = crop_image(st.session_state.query_image, detection['bbox'])
            st.image(cropped_image, caption=detection['category'], use_column_width=True)
    
    options = [f"{d['category']} (Confidence: {d['confidence']:.2f})" for d in st.session_state.detections]
    selected_option = st.selectbox("Select a category to search:", options)
    
    if st.button("Search Similar Items"):
        st.session_state.selected_category = selected_option
        st.session_state.step = 'show_results'

elif st.session_state.step == 'show_results':
    st.image(st.session_state.query_image, caption="Query Image", use_column_width=True)
    selected_detection = next(d for d in st.session_state.detections 
                              if f"{d['category']} (Confidence: {d['confidence']:.2f})" == st.session_state.selected_category)
    cropped_image = crop_image(st.session_state.query_image, selected_detection['bbox'])
    st.image(cropped_image, caption="Cropped Image", use_column_width=True)
    query_embedding = get_image_embedding(cropped_image)
    similar_images = find_similar_images(query_embedding, collection)
    
    st.subheader("Similar Items:")
    for img in similar_images:
        col1, col2 = st.columns(2)
        with col1:
            st.image(img['info']['image_url'], use_column_width=True)
        with col2:
            st.write(f"Name: {img['info']['name']}")
            st.write(f"Brand: {img['info']['brand']}")
            category = img['info'].get('category')
            if category:  
                st.write(f"Category: {category}")
            st.write(f"Price: {img['info']['price']}")
            st.write(f"Discount: {img['info']['discount']}%")
            st.write(f"Similarity: {img['similarity']:.2f}")
            
            # 추가 이미지 표시
            additional_images = img['info'].get('additional_images', [])
            if additional_images:
                st.write("Additional Images:")
                for add_img_url in additional_images[:3]:  # 최대 3개까지만 표시
                    st.image(add_img_url, width=100)
    
    if st.button("Start New Search"):
        st.session_state.step = 'input'
        st.session_state.query_image_url = ''
        st.session_state.detections = []
        st.session_state.selected_category = None

# Text search
st.sidebar.title("Text Search")
query_text = st.sidebar.text_input("Enter search text:")
if st.sidebar.button("Search by Text"):
    if query_text:
        text_embedding = get_text_embedding(query_text)
        similar_images = find_similar_images(text_embedding, collection)
        st.sidebar.subheader("Similar Items:")
        for img in similar_images:
            st.sidebar.image(img['info']['image_url'], use_column_width=True)
            st.sidebar.write(f"Name: {img['info']['name']}")
            st.sidebar.write(f"Brand: {img['info']['brand']}")
            category = img['info'].get('category')
            if category:
                st.sidebar.write(f"Category: {category}")
            st.sidebar.write(f"Price: {img['info']['price']}")
            st.sidebar.write(f"Discount: {img['info']['discount']}%")
            st.sidebar.write(f"Similarity: {img['similarity']:.2f}")
    else:
        st.sidebar.warning("Please enter a search text.")