app.py

import gradio as gr
import random
import numpy as np
import os
from huggingface_hub import InferenceClient

# 1. Initialize the Client
# If you are running this IN a Hugging Face Space, it will automatically
# find your token if you add it to 'Settings > Variables and Secrets' as HF_TOKEN
client = InferenceClient("black-forest-labs/FLUX.1-schnell")

MAX_SEED = np.iinfo(np.int32).max

def infer(prompt, seed, randomize_seed, width, height):
    if randomize_seed:
        seed = random.randint(0, MAX_SEED)
    
    # FLUX.1-schnell is optimized for 4 steps. 
    # The Inference Client handles the generator/torch logic server-side.
    try:
        image = client.text_to_image(
            prompt,
            width=width,
            height=height,
            num_inference_steps=4, # Schnell specifically needs only 4 steps
            guidance_scale=0.0,    # Schnell usually ignores guidance or prefers 0.0
            seed=seed
        )
        return image, seed
    except Exception as e:
        raise gr.Error(f"Generation failed: {e}")

# Simple UI
with gr.Blocks(theme=gr.themes.Soft()) as demo:
    gr.Markdown("# 🚀 CodeIgnite FLUX Engine")
    gr.Markdown("Using `FLUX.1-schnell` via Inference API for lightning-fast results.")
    
    with gr.Column():
        with gr.Row():
            prompt = gr.Textbox(
                label="Prompt", 
                placeholder="A futuristic cyberpunk city...", 
                scale=4
            )
            run_button = gr.Button("Generate", variant="primary")
        
        result = gr.Image(label="Result")
        
        with gr.Accordion("Advanced Settings", open=False):
            seed = gr.Slider(label="Seed", minimum=0, maximum=MAX_SEED, step=1, value=0)
            randomize_seed = gr.Checkbox(label="Randomize seed", value=True)
            # FLUX works best at 1024x1024, but 512-1024 is safe for API
            width = gr.Slider(label="Width", minimum=256, maximum=1024, step=32, value=1024)
            height = gr.Slider(label="Height", minimum=256, maximum=1024, step=32, value=1024)

    run_button.click(
        fn=infer,
        inputs=[prompt, seed, randomize_seed, width, height],
        outputs=[result, seed],
        api_name="predict"
    )

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