import gradio as gr
import numpy as np
import clip
import torch
from PIL import Image
import base64
from io import BytesIO
from decimal import Decimal

# Load the CLIP model
model, preprocess = clip.load("ViT-L/14@336px")
device = "cuda" if torch.cuda.is_available() else "cpu"
model.to(device).eval()

# Define a function to find similarity
def find_similarity(base64_image, text_input):
    # Decode the base64 image to bytes
    image_bytes = base64.b64decode(base64_image)

    # Convert the bytes to a PIL image
    image = Image.open(BytesIO(image_bytes))

    # Preprocess the image
    image = preprocess(image).unsqueeze(0).to(device)

    # Prepare input text
    text_tokens = clip.tokenize([text_input]).to(device)

    # Encode image and text features


    with torch.no_grad():
        image_features = model.encode_image(image)
        text_features = model.encode_text(text_tokens)

    # Normalize features and calculate similarity
    image_features /= image_features.norm(dim=-1, keepdim=True)
    text_features /= text_features.norm(dim=-1, keepdim=True)
    similarity = (text_features @ image_features.T).squeeze(0).cpu().numpy()

    return similarity

# Create a Gradio interface
iface = gr.Interface(
    fn=find_similarity,
    inputs=[
        gr.Textbox(label="Base64 Image", lines=8),
        gr.Textbox(label="Text Input")
    ],
    outputs="number",
    live=True,
    title="CLIP Model Image-Text Cosine Similarity",
    description="Upload a base64 image and enter text to find their cosine similarity.",
)

iface.launch()