import gradio as gr
import torch
import gc
from diffusers import StableDiffusionXLPipeline, EulerDiscreteScheduler
from transformers import CLIPTokenizer, CLIPTextModel, CLIPTextModelWithProjection
import logging

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

class AIImageGeneratorNSFW:
    def __init__(self):
        self.pipeline = None
        self.device = "cuda" if torch.cuda.is_available() else "cpu"
        # ¡Aquí va la línea!
        self.model_id = "segmind/Segmind-DE-XL"  
        self.is_model_loaded = False
        logger.info(f"Inicializando en dispositivo: {self.device}")

    def load_model(self):
        if self.is_model_loaded:
            return True
        try:
            logger.info("Cargando modelo NSFW...")
            torch_dtype = torch.float16 if self.device == "cuda" else torch.float32
            
            tokenizer_1 = CLIPTokenizer.from_pretrained(self.model_id, subfolder="tokenizer", use_fast=False)
            tokenizer_2 = CLIPTokenizer.from_pretrained(self.model_id, subfolder="tokenizer_2", use_fast=False)
            
            text_encoder_1 = CLIPTextModel.from_pretrained(self.model_id, subfolder="text_encoder", torch_dtype=torch_dtype, low_cpu_mem_usage=True)
            text_encoder_2 = CLIPTextModelWithProjection.from_pretrained(self.model_id, subfolder="text_encoder_2", torch_dtype=torch_dtype, low_cpu_mem_usage=True)
            
            self.pipeline = StableDiffusionXLPipeline.from_pretrained(
                self.model_id,
                tokenizer=[tokenizer_1, tokenizer_2],
                text_encoder=[text_encoder_1, text_encoder_2],
                torch_dtype=torch_dtype,
                scheduler=EulerDiscreteScheduler.from_pretrained(self.model_id, subfolder="scheduler"),
                safety_checker=None,
                use_safetensors=True,
                variant="fp16" if self.device == "cuda" else None
            )
            self.pipeline.to(self.device)
            self.is_model_loaded = True
            logger.info("Modelo NSFW cargado correctamente.")
            return True
        except Exception as e:
            logger.error(f"Error cargando modelo NSFW: {e}")
            return False

    def generate_image(self, prompt, width=1024, height=576, steps=35, guidance_scale=12.0):
        if not self.is_model_loaded and not self.load_model():
            return None
        try:
            with torch.inference_mode():
                generator = torch.Generator(self.device).manual_seed(torch.randint(0, 2**32, (1,)).item())
                result = self.pipeline(
                    prompt=prompt,
                    width=(width // 8) * 8,
                    height=(height // 8) * 8,
                    num_inference_steps=steps,
                    guidance_scale=guidance_scale,
                    generator=generator,
                    output_type="pil"
                )
                gc.collect()
                return result.images[0]
        except Exception as e:
            logger.error(f"Error generando imagen NSFW: {e}")
            gc.collect()
            return None

# Instancia global
generator_nsfw = None

def initialize_generator_nsfw():
    global generator_nsfw
    if generator_nsfw is None:
        generator_nsfw = AIImageGeneratorNSFW()
    return generator_nsfw

def generate_image_nsfw(prompt, width, height, steps, guidance_scale):
    gen = initialize_generator_nsfw()
    if not prompt.strip():
        return None
    return gen.generate_image(
        prompt=prompt,
        width=int(width),
        height=int(height),
        steps=int(steps),
        guidance_scale=float(guidance_scale)
    )

def create_nsfw_interface():
    with gr.Blocks(title="Generador de Imágenes NSFW con IA - Stable Diffusion") as iface:
        gr.Markdown("# 🎨 Generador NSFW basado en Stable Diffusion\n_Uso responsable y solo para adultos_")

        prompt = gr.Textbox(label="Prompt para la imagen NSFW", placeholder="Describe el contenido explícito...", lines=3)
        width = gr.Slider(512, 1536, value=1024, step=8, label="Ancho (pixeles)")
        height = gr.Slider(512, 1536, value=576, step=8, label="Alto (pixeles)")
        steps = gr.Slider(10, 50, value=35, step=1, label="Pasos de inferencia")
        guidance_scale = gr.Slider(1.0, 20.0, value=12.0, step=0.1, label="Escala de guía")

        btn_generate = gr.Button("Generar Imagen NSFW")
        img_output = gr.Image(label="Imagen generada")

        btn_generate.click(
            fn=generate_image_nsfw,
            inputs=[prompt, width, height, steps, guidance_scale],
            outputs=img_output
        )
    return iface

if __name__ == "__main__":
    nsfw_app = create_nsfw_interface()
    nsfw_app.launch()