app.py

# Import Streamlit first
import streamlit as st
st.set_page_config(
    page_title="Magic Story Generator",
    layout="centered",
    page_icon="📖"
)

# Other imports
import re
import time
import torch
import tempfile
from PIL import Image
from gtts import gTTS
from transformers import pipeline, AutoModelForCausalLM, AutoTokenizer

# --- Initialize Models First ---
@st.cache_resource(show_spinner=False)
def load_models():
    """Load and return both models at startup"""
    try:
        # 1. Image Captioning Model
        caption_pipe = pipeline(
            "image-to-text",
            model="Salesforce/blip-image-captioning-base",
            device=0 if torch.cuda.is_available() else -1
        )

        # 2. Story Generation Model
        story_tokenizer = AutoTokenizer.from_pretrained(
            "Qwen/Qwen3-0.6B",
            trust_remote_code=True
        )
        
        story_model = AutoModelForCausalLM.from_pretrained(
            "Qwen/Qwen3-0.6B",
            device_map="auto",
            torch_dtype=torch.float16
        )

        story_pipe = pipeline(
            "text-generation",
            model=story_model,
            tokenizer=story_tokenizer,
            max_new_tokens=230,
            temperature=0.9,
            top_k=50,
            top_p=0.9,
            repetition_penalty=1.1,
            eos_token_id=151645
        )

        return caption_pipe, story_pipe

    except Exception as e:
        st.error(f"🚨 Model loading failed: {str(e)}")
        st.stop()

# Initialize models immediately when app starts
caption_pipe, story_pipe = load_models()

# --- Rest of Application ---
st.title("📖✨ Turn Images into Children's Stories")

def clean_story_text(raw_text):
    """Improved cleaning function"""
    clean = re.sub(r'<\|.*?\|>', '', raw_text)  # Remove special tokens
    clean = re.sub(r'Okay, I need.*?(?=\n|$)', '', clean, flags=re.DOTALL)  # Remove thinking chains
    return clean.strip()

uploaded_image = st.file_uploader(
    "Upload a children's book style image:",
    type=["jpg", "jpeg", "png"]
)

if uploaded_image:
    image = Image.open(uploaded_image).convert("RGB")
    # Updated parameter here ↓
    st.image(image, use_container_width=True)  # Changed use_column_width to use_container_width

    with st.spinner("🔍 Analyzing image..."):
        try:
            caption_result = caption_pipe(image)
            image_caption = caption_result[0].get("generated_text", "")
            st.success(f"**Image Understanding:** {image_caption}")
        except Exception as e:
            st.error(f"❌ Image analysis failed: {str(e)}")
            st.stop()

    # Story generation prompt
    story_prompt = f"""Write a children's story about: {image_caption}
Rules:
- Use simple words (Grade 2 level)
- Exclude thinking processes
- 3 paragraphs maximum
Story:"""

    try:
        with st.spinner("📝 Crafting magical story..."):
            story_result = story_pipe(
                story_prompt,
                do_sample=True,
                top_p=0.9,
                repetition_penalty=1.2
            )
            
            raw_story = story_result[0]['generated_text']
            final_story = clean_story_text(raw_story.split("Story:")[-1])

            st.subheader("✨ Your Magical Story")
            st.write(final_story)

            # Audio conversion
            with st.spinner("🔊 Creating audio version..."):
                audio = gTTS(text=final_story, lang="en", slow=False)
                with tempfile.NamedTemporaryFile(delete=False, suffix=".mp3") as tmp_file:
                    audio.save(tmp_file.name)
                    st.audio(tmp_file.name, format="audio/mp3")

    except Exception as e:
        st.error(f"❌ Story generation failed: {str(e)}")

# Footer
st.markdown("---")
st.markdown("📚 Made with ♥ by The Story Wizard • [Report Issues](https://example.com)")