app.py

import streamlit as st
from PIL import Image
from transformers import pipeline
from gtts import gTTS
import os
os.system("pip install transformers==4.36.2")

st.set_page_config(page_title="AI Storyteller", page_icon="📖")

# Beautify | UI 美化
page_bg_img = """
<style>
[data-testid="stAppViewContainer"] {
    background-image: url("https://your-background-image-url.com");
    background-size: cover;
}
h1, h3 {
    text-align: center;
    color: white;
}
</style>
"""
st.markdown(page_bg_img, unsafe_allow_html=True)

# 🎯 Load Hugging Face Models | 加載 Hugging Face 模型
image_to_text_model = pipeline("image-to-text", model="Salesforce/blip-image-captioning-base")
story_generator = pipeline("text-generation", model="facebook/opt-350m", device=-1)

# Image to Text (Generate Caption) | 圖片 → 文字（生成描述）
def img2text(image_path):
    text = image_to_text_model(image_path)[0]["generated_text"]
    return text

# Text to Story (Generate a Complete Story) | 文字 → 故事（生成完整故事）
def text2story(text):
    prompt = f"Write a fun and magical children's story based on this idea: {text}.\n\nOnce upon a time..."
    story = story_generator(prompt, max_length=300, do_sample=True, temperature=0.8, top_p=0.9, repetition_penalty=1.2)[0]['generated_text']
    return story

#  Story to Speech (TTS) | 故事 → 語音（TTS）
def text2audio_gtts(story_text, filename="story.mp3"):

    # Avoid filename conflicts | 避免文件冲突
    if os.path.exists(filename):
        os.remove(filename)


    # Limit text length (to prevent gTTS crashes)| 限制 TTS 文本長度（避免 gTTS 崩潰）
    max_chars = 500  # gTTS 可能不支持過長文本
    story_text = story_text[:max_chars]

    # Generate Speech | 生成语音
    tts = gTTS(text=story_text, lang="en")
    tts.save(filename)

    return filename

# Streamlit Web UI
st.header("📖 AI Storyteller: Turn Your Image into a Story with Audio")

uploaded_file = st.file_uploader("Upload an Image...", type=["jpg", "png"])

if uploaded_file:

    # Save image locally | 保存圖片到本地
    image_path = "uploaded_image.jpg"
    with open(image_path, "wb") as f:
        f.write(uploaded_file.getbuffer())

    #  Load and Display Image | 讀取並顯示圖片
    image = Image.open(image_path)
    st.image(image, caption="Uploaded Image", use_container_width=True)

    # Generate Image Caption | 生成圖片描述
    st.text("🔍 Generating image caption...")
    caption = img2text(image_path)  
    st.write("**Image Description:**", caption)

    #  Generate Story | 生成故事
    st.text("📝 Generating story...")
    story = text2story(caption)
    st.write("**Generated Story:**")
    st.write(story)

    # Generate Audio | 生成語音
    st.text("🔊 Generating audio...")
    audio_file = text2audio_gtts(story)

    # Play Audio | 播放音頻
    st.audio(audio_file, format="audio/mp3")

    # Download Audio | 下載按钮
    with open(audio_file, "rb") as file:
        st.download_button("📥 Download Audio", file, file_name="story.mp3")