import os
import gradio as gr
from together import Together
from PIL import Image
import io
import base64

# Initialize the Together AI client
client = Together(api_key=os.environ.get('TOGETHER_API_KEY'))

def encode_image(image_path):
    try:
        with Image.open(image_path) as img:
            buffered = io.BytesIO()
            img.save(buffered, format="PNG")
            return base64.b64encode(buffered.getvalue()).decode('utf-8')
    except Exception as e:
        print(f"Error encoding image: {e}")
        return None

def chat_with_image(message, image, history):
    # Prepare the messages
    messages = [{"role": "system", "content": "You are a helpful assistant that can analyze images and text."}]
    
    for human, assistant in history:
        if human.startswith("Image: "):
            # This is an image message
            image_path = human.split(": ", 1)[1]
            encoded_image = encode_image(image_path)
            if encoded_image:
                messages.append({
                    "role": "user",
                    "content": [
                        {"type": "image_url", "image_url": {"url": f"data:image/png;base64,{encoded_image}"}},
                        {"type": "text", "text": "What's in this image?"}
                    ]
                })
            else:
                messages.append({"role": "user", "content": "I tried to upload an image, but there was an error."})
        else:
            # This is a text-only message
            messages.append({"role": "user", "content": human})
        messages.append({"role": "assistant", "content": assistant})
    
    # Add the current message
    if image:
        encoded_image = encode_image(image)
        if encoded_image:
            messages.append({
                "role": "user",
                "content": [
                    {"type": "image_url", "image_url": {"url": f"data:image/png;base64,{encoded_image}"}},
                    {"type": "text", "text": message or "What's in this image?"}
                ]
            })
        else:
            messages.append({"role": "user", "content": "I tried to upload an image, but there was an error."})
    else:
        messages.append({"role": "user", "content": message})
    
    # Call the Together AI API
    try:
        response = client.chat.completions.create(
            model="meta-llama/Llama-3.2-11B-Vision-Instruct-Turbo",
            messages=messages,
            max_tokens=512,
            temperature=0.7,
            top_p=0.7,
            top_k=50,
            repetition_penalty=1,
            stop=["<|eot_id|>", "<|eom_id|>"],
            stream=True
        )
        
        # Accumulate the response
        full_response = ""
        for chunk in response:
            if chunk.choices[0].delta.content is not None:
                full_response += chunk.choices[0].delta.content
                yield full_response
    except Exception as e:
        yield f"An error occurred: {str(e)}"

# Create the Gradio interface
with gr.Blocks() as demo:
    chatbot = gr.Chatbot()
    msg = gr.Textbox()
    image = gr.Image(type="filepath")
    clear = gr.Button("Clear")

    def user(user_message, image, history):
        if image:
            return "", None, history + [[f"Image: {image}", None]]
        else:
            return "", None, history + [[user_message, None]]

    def bot(history):
        user_message = history[-1][0]
        image = None
        if user_message.startswith("Image: "):
            image = user_message.split(": ", 1)[1]
            user_message = "What's in this image?"
        
        bot_message = chat_with_image(user_message, image, history[:-1])
        history[-1][1] = ""
        for character in bot_message:
            history[-1][1] += character
            yield history

    msg.submit(user, [msg, image, chatbot], [msg, image, chatbot], queue=False).then(
        bot, chatbot, chatbot
    )
    clear.click(lambda: None, None, chatbot, queue=False)

demo.queue()
demo.launch()