"""Gradio Chat Interface for Data Analyzer Agent with Image Support."""
import os
import base64
import io
import tempfile
from PIL import Image

import gradio as gr
from openai import OpenAI
from e2b_code_interpreter import Sandbox

from src import coding_agent, execute_code_schema, tools

# Load environment variables
OPENAI_API_KEY = os.getenv("OPENAI_API_KEY")
E2B_API_KEY = os.getenv("E2B_API_KEY")

# Initialize OpenAI client
client = OpenAI() if OPENAI_API_KEY else None

# Global sandbox reference
sbx = None

# System prompt
SYSTEM_PROMPT = """You are a data analysis agent. Generate Python code to analyze data, perform statistical analysis, and create visualizations using matplotlib, pandas, numpy, and seaborn. Always use these libraries for professional data analysis."""


def respond(message, history):
    """Handle chat with image support."""
    global sbx

    # Check API keys
    if not client or not E2B_API_KEY:
        yield "Error: Environment variables not set. Please set OPENAI_API_KEY and E2B_API_KEY.", []
        return

    try:
        # Create sandbox on first use
        if sbx is None:
            sbx = Sandbox.create(timeout=3600)

        # Call coding_agent
        messages, metadata = coding_agent(
            client=client,
            query=message,
            system=SYSTEM_PROMPT,
            tools=tools,
            tools_schemas=[execute_code_schema],
            sbx=sbx,
            messages=None,
            max_steps=5
        )

        # Extract response text
        response_text = ""
        for msg in reversed(messages):
            if isinstance(msg, dict) and msg.get("type") == "message":
                content = msg.get("content", [])
                if isinstance(content, list):
                    text_parts = [item.get("text", "") for item in content
                                 if isinstance(item, dict) and item.get("type") == "output_text"]
                    response_text = "".join(text_parts)
                else:
                    response_text = str(content)
                break

        if not response_text:
            response_text = "Analysis complete."

        # Extract images from metadata
        image_files = []
        if metadata.get("images"):
            temp_dir = tempfile.gettempdir()
            for i, png_data in enumerate(metadata["images"]):
                # Decode base64 PNG to PIL Image
                img_bytes = base64.b64decode(png_data)
                img = Image.open(io.BytesIO(img_bytes))

                # Save to system temp directory
                temp_path = os.path.join(temp_dir, f"plot_{i}.png")
                img.save(temp_path)
                image_files.append(temp_path)

        yield response_text, image_files

    except Exception as e:
        import traceback
        error_msg = f"Error: {str(e)}\n\nTraceback:\n{traceback.format_exc()}"
        yield error_msg, []


# Create Gradio interface with Blocks for image support
with gr.Blocks(title="Data Analyzer Agent") as demo:
    gr.Markdown("# Data Analyzer Agent")
    gr.Markdown("Ask me to analyze data and create visualizations!")

    with gr.Row():
        with gr.Column(scale=2):
            chatbot = gr.Chatbot(label="Chat", height=400, type="tuples")
            msg = gr.Textbox(
                label="Message",
                placeholder="Ask me to analyze data...",
                lines=2
            )
            with gr.Row():
                submit = gr.Button("Submit", variant="primary")
                clear = gr.Button("Clear")

        with gr.Column(scale=1):
            gallery = gr.Gallery(label="Visualizations", columns=1, height=400)

    # Examples
    gr.Examples(
        examples=[
            "Calculate the mean of [1,2,3,4,5]",
            "Generate 50 random numbers from a normal distribution and plot a histogram",
            "Create a scatter plot of 20 random x,y points"
        ],
        inputs=msg
    )

    def user_submit(user_message, history):
        """Handle user message submission."""
        return "", history + [[user_message, None]]

    def bot_respond(history):
        """Get bot response with images."""
        user_message = history[-1][0]
        bot_response, images = None, []

        for response_text, image_files in respond(user_message, history[:-1]):
            bot_response = response_text
            images = image_files
            # Yield intermediate updates for streaming
            history[-1][1] = bot_response
            yield history, images

        # Final yield with complete response
        history[-1][1] = bot_response
        yield history, images

    # Queue must be enabled before setting up event handlers with .then()
    demo.queue(default_concurrency_limit=10)

    msg.submit(user_submit, [msg, chatbot], [msg, chatbot], queue=False).then(
        bot_respond, chatbot, [chatbot, gallery]
    )
    submit.click(user_submit, [msg, chatbot], [msg, chatbot], queue=False).then(
        bot_respond, chatbot, [chatbot, gallery]
    )
    clear.click(lambda: ([], []), None, [chatbot, gallery], queue=False)


if __name__ == "__main__":
    demo.launch(show_error=True)