import gradio as gr
from utils.pdf_utils import update_page, load_pdf
from extractors.model_runner import models, run_extract_parallel

def update_dropdowns(model_a_choice, model_b_choice):
    if model_a_choice == model_b_choice:
        options_b = [m for m in models if m != model_a_choice]
        return gr.update(choices=options_b, value=options_b[0] if options_b else None)
    else:
        options_b = [m for m in models if m != model_a_choice]
        return gr.update(choices=options_b, value=model_b_choice)

def sync_models(model_a_choice, model_b_choice):
    updated_dropdown_b = update_dropdowns(model_a_choice, model_b_choice)
    return updated_dropdown_b

def dummy_function_a(model_a_choice):
    return f"Model A selected: {model_a_choice}"

def dummy_function_b(model_b_choice):
    return f"Model B selected: {model_b_choice}"

def update_button(file):
    return gr.update(interactive=bool(file))

def update_vote_button(output):
    is_active = bool(output)
    return [gr.update(interactive=is_active) for _ in range(4)]

def clear_outputs():
    return "", ""

def arena_sxs():
    with gr.Blocks() as arena_block:
        gr.Markdown("# Rules")
        gr.Markdown("- Upload a PDF file to extract with two chosen models (e.g., Llama, Unstructured, ChatGPT, Claude) and vote for the better one!")
        gr.Markdown("- You can upload multiple files until you identify a winner.")

        gr.Markdown("## 1. Upload a file.")
        gr.Markdown("Only PDF files supported.")
        with gr.Row():
            with gr.Column(scale=2):
                pdf = gr.File(type="filepath", label="Upload PDF", file_types=[".pdf"])
                pdf_image = gr.Image(label="PDF Page")
                page_info = gr.Textbox(label="")
                current_page = gr.State(value=0)
                with gr.Row():
                    prev_button = gr.Button("Previous")
                    next_button = gr.Button("Next")

        gr.Markdown("---")
        gr.Markdown("## 2. Choose two models to compare")

        with gr.Blocks():
            with gr.Row():
                model_a = gr.Dropdown(choices=models, value=models[0], label="")
                model_b = gr.Dropdown(choices=[m for m in models if m != models[0]], value=models[1], label="")

            with gr.Row():
                output_a = gr.Markdown(height=400)
                output_b = gr.Markdown(height=400)

        with gr.Row():
            extract_button = gr.Button("Parse", interactive=False)

        # with gr.Row():
        #     vote_model_a_button = gr.Button("👈 A is better", interactive=False)
        #     vote_model_b_button = gr.Button("👉 B is better", interactive=False)
        #     vote_tie_button = gr.Button("🤝 Tie", interactive=False)
        #     vote_bad_button = gr.Button("👎 Both are bad", interactive=False)

        # Handlers
        pdf.change(load_pdf, inputs=[pdf], outputs=[pdf_image, page_info, current_page])
        pdf.change(fn=update_button, inputs=pdf, outputs=extract_button)
        model_a.change(sync_models, inputs=[model_a, model_b], outputs=model_b)
        model_a.change(dummy_function_a, inputs=model_a)
        model_b.change(dummy_function_b, inputs=model_b)
        # output_a.change(fn=update_vote_button, inputs=output_a, outputs=[vote_model_a_button, vote_model_b_button, vote_tie_button, vote_bad_button])
        # output_b.change(fn=update_vote_button, inputs=output_b, outputs=[vote_model_a_button, vote_model_b_button, vote_tie_button, vote_bad_button])

        # # Button Handlers
        prev_button.click(
            fn=lambda file_path, page: update_page(file_path, page, -1),
            inputs=[pdf, current_page],
            outputs=[pdf_image, page_info, current_page],
        )

        next_button.click(
            fn=lambda file_path, page: update_page(file_path, page, 1),
            inputs=[pdf, current_page],
            outputs=[pdf_image, page_info, current_page],
        )

        extract_button.click(
            fn=run_extract_parallel,
            inputs=[model_a, model_b, pdf],
            outputs=[output_a, output_b]
        )

        # extract_button.click(
        #     fn=clear_outputs,
        #     outputs=[output_a, output_b]
        # )

        # vote_model_a_button.click(fn=lambda model_a, model_b: vote_for_model(model_a, Vote.GOOD, model_b, Vote.NEUTRAL), inputs=[model_a, model_b], outputs=[output_a, output_b])
        # vote_model_b_button.click(fn=lambda model_a, model_b: vote_for_model(model_a, Vote.NEUTRAL, model_b, Vote.GOOD), inputs=[model_a, model_b], outputs=[output_a, output_b])
        # vote_tie_button.click(fn=lambda model_a, model_b: vote_for_model(model_a, Vote.NEUTRAL, model_b, Vote.NEUTRAL), inputs=[model_a, model_b], outputs=[output_a, output_b])
        # vote_bad_button.click(fn=lambda model_a, model_b: vote_for_model(model_a, Vote.BAD, model_b, Vote.BAD), inputs=[model_a, model_b], outputs=[output_a, output_b])

    return arena_block