app.py

"""
Trouter-Imagine-1 Image Generator
Apache 2.0 License
A Gradio-based image generation interface using OpenTrouter/Trouter-Imagine-1
"""

import gradio as gr
import requests
import io
from PIL import Image
import base64
import json
import os
from datetime import datetime

# Configuration
API_URL = "https://api-inference.huggingface.co/models/OpenTrouter/Trouter-Imagine-1"
HF_TOKEN = os.getenv("HF_TOKEN")  # Set this in your Hugging Face Space secrets

class ImageGenerator:
    """Main class for handling image generation requests"""
    
    def __init__(self, api_url, token):
        self.api_url = api_url
        self.headers = {"Authorization": f"Bearer {token}"} if token else {}
        self.generation_history = []
        
    def generate_image(self, prompt, negative_prompt="", width=1024, height=1024, 
                      num_inference_steps=30, guidance_scale=7.5, seed=-1):
        """
        Generate an image from a text prompt
        
        Args:
            prompt: Text description of the desired image
            negative_prompt: Things to avoid in the generation
            width: Image width in pixels
            height: Image height in pixels
            num_inference_steps: Number of denoising steps (more = better quality but slower)
            guidance_scale: How closely to follow the prompt (higher = more strict)
            seed: Random seed for reproducibility (-1 for random)
        
        Returns:
            PIL Image object or error message
        """
        try:
            # Prepare the payload
            payload = {
                "inputs": prompt,
                "parameters": {
                    "negative_prompt": negative_prompt,
                    "width": width,
                    "height": height,
                    "num_inference_steps": num_inference_steps,
                    "guidance_scale": guidance_scale,
                }
            }
            
            # Add seed if specified
            if seed != -1:
                payload["parameters"]["seed"] = seed
            
            # Make the API request
            response = requests.post(
                self.api_url,
                headers=self.headers,
                json=payload,
                timeout=120
            )
            
            # Check for errors
            if response.status_code != 200:
                error_msg = f"Error {response.status_code}: {response.text}"
                return None, error_msg
            
            # Convert response to image
            image = Image.open(io.BytesIO(response.content))
            
            # Save to history
            self.generation_history.append({
                "timestamp": datetime.now().isoformat(),
                "prompt": prompt,
                "negative_prompt": negative_prompt,
                "parameters": {
                    "width": width,
                    "height": height,
                    "steps": num_inference_steps,
                    "guidance": guidance_scale,
                    "seed": seed
                }
            })
            
            success_msg = f"✅ Image generated successfully! ({width}x{height}px)"
            return image, success_msg
            
        except requests.exceptions.Timeout:
            return None, "⏱️ Request timed out. Try reducing image size or steps."
        except Exception as e:
            return None, f"❌ Error: {str(e)}"
    
    def get_history_summary(self):
        """Get a summary of generation history"""
        if not self.generation_history:
            return "No generations yet."
        
        summary = f"Total generations: {len(self.generation_history)}\n\n"
        summary += "Recent generations:\n"
        for i, entry in enumerate(self.generation_history[-5:], 1):
            summary += f"\n{i}. {entry['timestamp']}\n"
            summary += f"   Prompt: {entry['prompt'][:50]}...\n"
        
        return summary


# Initialize the generator
generator = ImageGenerator(API_URL, HF_TOKEN)


def generate_wrapper(prompt, negative_prompt, width, height, steps, guidance, seed, progress=gr.Progress()):
    """Wrapper function for Gradio interface with progress tracking"""
    if not prompt.strip():
        return None, "⚠️ Please enter a prompt!"
    
    progress(0, desc="Initializing...")
    progress(0.3, desc="Sending request to model...")
    
    image, message = generator.generate_image(
        prompt=prompt,
        negative_prompt=negative_prompt,
        width=int