app.py

import gradio as gr
import json

from src.predictor import MTGPickPredictor
from src.utils import top_k_accuracy
from src.mtga import card_name_to_image_url
from src.mtga import mtga_id_to_image_url

# TODO: find a cleaner way to define helper function required for the model
top_3_accuracy = lambda o, t: top_k_accuracy(o, t, k=3)

def main():
    examples = {
        "DSK": { 
            "pack": [92163, 92375, 92091, 92173, 92257, 92112, 92212], 
            "pool": [92218, 92127, 92148, 92152, 92242, 92113, 92140]
            },
        "FDN": {
            'pack': [93741, 93974, 93966, 93870, 93781, 93796, 93875, 93744, 93938, 93733, 93801, 93732, 93943, 93832], 
            'pool': []
            }
    }

    predictor = MTGPickPredictor()

    def predict_fn(set_code, input):
        state = json.loads(input.replace("'", "\""))
        predictions = predictor.predict(set_code, state)
        
        # For gallery
        gallery_output = [
            (card_name_to_image_url(card_name), f"{card_name} ({probability*100:.0f}%)")
            for _, card_name, probability in predictions
        ]
        
        # For probabilities list
        prob_output = [
            (mtga_card_id, float(probability))
            for mtga_card_id, _, probability in predictions
        ]
        
        return gallery_output, prob_output

    def update_example(set_choice):
        return json.dumps(examples.get(set_choice, {}), indent=2)
    
    def preview_cards(set_choice, text_input):
        try:
            input_json = json.loads(text_input.replace("'", "\""))
            
            pack_cards = [
                (mtga_id_to_image_url(card), f"{card}")
                for card in input_json.get('pack', [])
            ]
            
            pool_cards = [
                (mtga_id_to_image_url(card), f"{card}")
                for card in input_json.get('pool', [])
            ]
            
            return pack_cards, pool_cards
        
        except json.JSONDecodeError:
            print("Error parsing JSON")
            return [], []
    
    with gr.Blocks() as demo:
        gr.Markdown("# MTG Draft Pick Predictor")
        gr.Markdown("🔮 Predict the next best card for your draft deck.")

        with gr.Row():
            set_dropdown = gr.Dropdown(
                choices=[('(FDN) Foundations','FDN'), ('(DSK) Duskmourn', 'DSK')],
                label='Set'
            )
            text_input = gr.Text(
                value=json.dumps(examples.get('FDN', {}), indent=2),  # Default example
                label="Pack/Pool:"
            )
        
        with gr.Row():
            pack_gallery = gr.Gallery(
                label="Pack",
                columns=3,
                object_fit='scale-down'
            )
            pool_gallery = gr.Gallery(
                label="Pool",
                columns=3,
                object_fit='scale-down'
            )

        button = gr.Button("Preview inputs").click(
            fn=preview_cards,
            inputs=[set_dropdown, text_input],
            outputs=[pack_gallery, pool_gallery]
        )

        with gr.Row():
            preidctions_gallery = gr.Gallery(
                label="Predictions",
                #height=300,
                columns=3,
                object_fit='scale-down',
                allow_preview=False
            )

            predictions_probs = gr.JSON(label="Card IDs and Probabilities")

        # Update text input when dropdown changes
        set_dropdown.change(
            fn=update_example,
            inputs=[set_dropdown],
            outputs=[text_input]
        )

        # Predict button
        gr.Button("Predict").click(
            fn=predict_fn,
            inputs=[set_dropdown, text_input],
            outputs=[preidctions_gallery, predictions_probs]
        )

    demo.launch()

if __name__ == "__main__":
    main()