import io
import os
import streamlit as st
import requests
from PIL import Image
from model import get_caption_model, generate_caption


@st.cache(allow_output_mutation=True)
def get_model():
    return get_caption_model()

caption_model = get_model()


def predict():
    captions = []
    pred_caption = generate_caption('tmp.jpg', caption_model)

    st.markdown('#### Predicted Captions:')
    captions.append(pred_caption)

    for _ in range(4):
        pred_caption = generate_caption('tmp.jpg', caption_model, add_noise=True)
        if pred_caption not in captions:
            captions.append(pred_caption)
    
    for c in captions:
        st.write(c)

st.title('Image Captioner')
img_url = st.text_input(label='Enter Image URL')

if (img_url != "") and (img_url != None):
    img = Image.open(requests.get(img_url, stream=True).raw)
    img = img.convert('RGB')
    st.image(img)
    img.save('tmp.jpg')
    predict()
    os.remove('tmp.jpg')


st.markdown('<center style="opacity: 70%">OR</center>', unsafe_allow_html=True)
img_upload = st.file_uploader(label='Upload Image', type=['jpg', 'png'])

if img_upload != None:
    img = img_upload.read()
    img = Image.open(io.BytesIO(img))
    img = img.convert('RGB')
    img.save('tmp.jpg')
    st.image(img)
    predict()
    os.remove('tmp.jpg')