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from flask import Flask, request, jsonify, send_file, render_template_string
import requests
import io
import os
import random
from PIL import Image
from deep_translator import GoogleTranslator

app = Flask(__name__)

API_URL = "https://api-inference.huggingface.co/models/black-forest-labs/FLUX.1-dev"
API_TOKEN = os.getenv("HF_READ_TOKEN")
headers = {"Authorization": f"Bearer {API_TOKEN}"}
timeout = 100

# Function to query the API and return the generated image
def query(prompt, negative_prompt="", steps=35, cfg_scale=7, sampler="DPM++ 2M Karras", seed=-1, strength=0.7, width=1024, height=1024):
    if not prompt:
        return None, "Prompt is required"

    key = random.randint(0, 999)
    
    # Translate the prompt from Russian to English if necessary
    prompt = GoogleTranslator(source='ru', target='en').translate(prompt)
    print(f'Generation {key} translation: {prompt}')

    # Add some extra flair to the prompt
    prompt = f"{prompt} | ultra detail, ultra elaboration, ultra quality, perfect."
    print(f'Generation {key}: {prompt}')
    
    payload = {
        "inputs": prompt,
        "is_negative": False,
        "steps": steps,
        "cfg_scale": cfg_scale,
        "seed": seed if seed != -1 else random.randint(1, 1000000000),
        "strength": strength,
        "parameters": {
            "width": width,
            "height": height
        }
    }

    # Send the request to the API
    try:
        response = requests.post(API_URL, headers=headers, json=payload, timeout=timeout)
        if response.status_code != 200:
            return None, f"Error: Failed to get image. Status code: {response.status_code}, Details: {response.text}"
        
        image_bytes = response.content
        image = Image.open(io.BytesIO(image_bytes))
        return image, None
    except Exception as e:
        return None, f"Error when trying to open the image: {e}"

# HTML template for the index page
index_html = """
<!DOCTYPE html>
<html lang="ja">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>FLUX.1-Dev Image Generator</title>
</head>
<body>
    <h1>FLUX.1-Dev Image Generator</h1>
    <form action="/generate" method="get">
        <label for="prompt">Prompt:</label>
        <input type="text" id="prompt" name="prompt" placeholder="Enter your prompt" required><br><br>
        
        <label for="negative_prompt">Negative Prompt:</label>
        <input type="text" id="negative_prompt" name="negative_prompt" value="(deformed, distorted, disfigured), poorly drawn, bad anatomy, wrong anatomy, extra limb, missing limb, floating limbs, (mutated hands and fingers), disconnected limbs, mutation, mutated, ugly, disgusting, blurry, amputation, misspellings, typos"><br><br>

        <label for="width">Width:</label>
        <input type="number" id="width" name="width" value="1024"><br><br>

        <label for="height">Height:</label>
        <input type="number" id="height" name="height" value="1024"><br><br>

        <label for="steps">Sampling Steps:</label>
        <input type="number" id="steps" name="steps" value="35"><br><br>

        <label for="cfgs">CFG Scale:</label>
        <input type="number" id="cfgs" name="cfgs" value="7"><br><br>

        <label for="sampler">Sampling Method:</label>
        <select id="sampler" name="sampler">
            <option value="DPM++ 2M Karras">DPM++ 2M Karras</option>
            <option value="DPM++ SDE Karras">DPM++ SDE Karras</option>
            <option value="Euler">Euler</option>
            <option value="Euler a">Euler a</option>
            <option value="Heun">Heun</option>
            <option value="DDIM">DDIM</option>
        </select><br><br>

        <label for="strength">Strength:</label>
        <input type="number" id="strength" name="strength" value="0.7" step="0.01" min="0" max="1"><br><br>

        <label for="seed">Seed:</label>
        <input type="number" id="seed" name="seed" value="-1" step="1"><br><br>

        <button type="submit">Generate Image</button>
    </form>
</body>
</html>
"""

@app.route('/')
def index():
    return render_template_string(index_html)

@app.route('/generate', methods=['GET'])
def generate_image():
    # Retrieve query parameters
    prompt = request.args.get("prompt", "")
    negative_prompt = request.args.get("negative_prompt", "")
    steps = int(request.args.get("steps", 35))
    cfg_scale = float(request.args.get("cfgs", 7))
    sampler = request.args.get("sampler", "DPM++ 2M Karras")
    seed = int(request.args.get("seed", -1))
    strength = float(request.args.get("strength", 0.7))
    width = int(request.args.get("width", 1024))
    height = int(request.args.get("height", 1024))

    # Call the query function to generate the image
    image, error = query(prompt, negative_prompt, steps, cfg_scale, sampler, seed, strength, width, height)

    if error:
        return jsonify({"error": error}), 500

    # Save the image to a buffer
    img_io = io.BytesIO()
    image.save(img_io, 'PNG')
    img_io.seek(0)

    # Return the image
    return send_file(img_io, mimetype='image/png')

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=7860)