import torch
import numpy as np
import cv2
from PIL import Image
import logging
import gc
import time
from typing import Optional, Dict, Any, Tuple, List
from pathlib import Path
import warnings
warnings.filterwarnings("ignore")

from diffusers import StableDiffusionXLPipeline, DPMSolverMultistepScheduler
import open_clip
from mask_generator import MaskGenerator
from image_blender import ImageBlender
from quality_checker import QualityChecker

logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)

class SceneWeaverCore:
    """
    SceneWeaver with perfect background generation + fixed blending + memory optimization
    """

    # Style presets for diversity generation mode
    STYLE_PRESETS = {
        "professional": {
            "name": "Professional Business",
            "modifier": "professional office environment, clean background, corporate setting, bright even lighting",
            "negative_extra": "casual, messy, cluttered",
            "guidance_scale": 8.0
        },
        "casual": {
            "name": "Casual Lifestyle",
            "modifier": "casual outdoor setting, natural environment, relaxed atmosphere, warm natural lighting",
            "negative_extra": "formal, studio",
            "guidance_scale": 7.5
        },
        "artistic": {
            "name": "Artistic Creative",
            "modifier": "artistic background, creative composition, vibrant colors, interesting lighting",
            "negative_extra": "boring, plain",
            "guidance_scale": 6.5
        },
        "nature": {
            "name": "Natural Scenery",
            "modifier": "beautiful natural scenery, outdoor landscape, scenic view, natural lighting",
            "negative_extra": "urban, indoor",
            "guidance_scale": 7.5
        }
    }

    def __init__(self, device: str = "auto"):
        self.device = self._setup_device(device)

        # Model configurations - KEEP SAME FOR PERFECT GENERATION
        self.base_model_id = "stabilityai/stable-diffusion-xl-base-1.0"
        self.clip_model_name = "ViT-B-32"
        self.clip_pretrained = "openai"

        # Pipeline objects
        self.pipeline = None
        self.clip_model = None
        self.clip_preprocess = None
        self.clip_tokenizer = None
        self.is_initialized = False

        # Generation settings - KEEP SAME
        self.max_image_size = 1024
        self.default_steps = 25
        self.use_fp16 = True

        # Enhanced memory management
        self.generation_count = 0
        self.cleanup_frequency = 1  # More frequent cleanup
        self.max_history = 3  # Limit generation history

        # Initialize helper classes
        self.mask_generator = MaskGenerator(self.max_image_size)
        self.image_blender = ImageBlender()
        self.quality_checker = QualityChecker()

        logger.info(f"OptimizedSceneWeaver initialized on {self.device}")

    def _setup_device(self, device: str) -> str:
        """Setup computation device"""
        if device == "auto":
            if torch.cuda.is_available():
                return "cuda"
            elif hasattr(torch.backends, 'mps') and torch.backends.mps.is_available():
                return "mps"
            else:
                return "cpu"
        return device

    def _ultra_memory_cleanup(self):
        """Ultra aggressive memory cleanup for Colab stability"""
        logger.debug("🧹 Ultra memory cleanup...")

        # Multiple rounds of garbage collection
        for i in range(5):
            gc.collect()

        if torch.cuda.is_available():
            # Clear all cached memory
            torch.cuda.empty_cache()
            torch.cuda.ipc_collect()

            # Force synchronization
            torch.cuda.synchronize()

            # Clear any remaining memory fragments
            try:
                torch.cuda.memory.empty_cache()
            except:
                pass

        logger.debug("✅ Ultra cleanup completed")

    def load_models(self, progress_callback: Optional[callable] = None):
        """Load AI models - KEEP SAME FOR PERFECT GENERATION"""
        if self.is_initialized:
            logger.info("Models already loaded")
            return

        logger.info("📥 Loading AI models...")

        try:
            self._ultra_memory_cleanup()

            if progress_callback:
                progress_callback("Loading OpenCLIP for image understanding...", 20)

            # Load OpenCLIP - KEEP SAME
            self.clip_model, _, self.clip_preprocess = open_clip.create_model_and_transforms(
                self.clip_model_name,
                pretrained=self.clip_pretrained,
                device=self.device
            )
            self.clip_tokenizer = open_clip.get_tokenizer(self.clip_model_name)
            self.clip_model.eval()

            logger.info("✅ OpenCLIP loaded")

            if progress_callback:
                progress_callback("Loading SDXL text-to-image pipeline...", 60)

            # Load standard SDXL text-to-image pipeline - KEEP SAME
            self.pipeline = StableDiffusionXLPipeline.from_pretrained(
                self.base_model_id,
                torch_dtype=torch.float16 if self.use_fp16 else torch.float32,
                use_safetensors=True,
                variant="fp16" if self.use_fp16 else None
            )

            # Use DPM solver for faster generation - KEEP SAME
            self.pipeline.scheduler = DPMSolverMultistepScheduler.from_config(
                self.pipeline.scheduler.config
            )

            # Move to device
            self.pipeline = self.pipeline.to(self.device)

            if progress_callback:
                progress_callback("Applying optimizations...", 90)

            # Memory optimizations - ENHANCED
            try:
                self.pipeline.enable_xformers_memory_efficient_attention()
                logger.info("✅ xformers enabled")
            except Exception:
                try:
                    self.pipeline.enable_attention_slicing()
                    logger.info("✅ Attention slicing enabled")
                except Exception:
                    logger.warning("⚠️ No memory optimizations available")

            # Additional memory optimizations
            if hasattr(self.pipeline, 'enable_vae_tiling'):
                self.pipeline.enable_vae_tiling()

            if hasattr(self.pipeline, 'enable_vae_slicing'):
                self.pipeline.enable_vae_slicing()

            # Set to eval mode
            self.pipeline.unet.eval()
            if hasattr(self.pipeline, 'vae'):
                self.pipeline.vae.eval()

            # Enable sequential CPU offload if very low on memory
            try:
                if torch.cuda.is_available():
                    free_memory = torch.cuda.get_device_properties(0).total_memory - torch.cuda.memory_allocated()
                    if free_memory < 4 * 1024**3:  # Less than 4GB free
                        self.pipeline.enable_sequential_cpu_offload()
                        logger.info("✅ Sequential CPU offload enabled for low memory")
            except:
                pass

            self.is_initialized = True

            if progress_callback:
                progress_callback("Models loaded successfully!", 100)

            # Memory status
            if torch.cuda.is_available():
                memory_used = torch.cuda.memory_allocated() / 1024**3
                memory_total = torch.cuda.get_device_properties(0).total_memory / 1024**3
                logger.info(f"📊 GPU Memory: {memory_used:.1f}GB / {memory_total:.1f}GB")

        except Exception as e:
            logger.error(f"❌ Model loading failed: {e}")
            raise RuntimeError(f"Failed to load models: {str(e)}")

    def analyze_image_with_clip(self, image: Image.Image) -> str:
        """Analyze uploaded image using OpenCLIP - KEEP SAME"""
        if not self.clip_model:
            return "Image analysis not available"

        try:
            image_input = self.clip_preprocess(image).unsqueeze(0).to(self.device)

            categories = [
                "a photo of a person",
                "a photo of an animal",
                "a photo of an object",
                "a photo of a character",
                "a photo of a cartoon",
                "a photo of nature",
                "a photo of a building",
                "a photo of a landscape"
            ]

            text_inputs = self.clip_tokenizer(categories).to(self.device)

            with torch.no_grad():
                image_features = self.clip_model.encode_image(image_input)
                text_features = self.clip_model.encode_text(text_inputs)

                image_features /= image_features.norm(dim=-1, keepdim=True)
                text_features /= text_features.norm(dim=-1, keepdim=True)

                similarity = (100.0 * image_features @ text_features.T).softmax(dim=-1)

                best_match_idx = similarity.argmax().item()
                confidence = similarity[0, best_match_idx].item()

                category = categories[best_match_idx].replace("a photo of ", "")

                return f"Detected: {category} (confidence: {confidence:.1%})"

        except Exception as e:
            logger.error(f"CLIP analysis failed: {e}")
            return "Image analysis failed"

    def enhance_prompt(
        self,
        user_prompt: str,
        foreground_image: Image.Image
    ) -> str:
        """
        Smart prompt enhancement based on image analysis.
        Adds appropriate lighting, atmosphere, and quality descriptors.

        Args:
            user_prompt: Original user-provided prompt
            foreground_image: Foreground image for analysis

        Returns:
            Enhanced prompt string
        """
        logger.info("✨ Enhancing prompt based on image analysis...")

        try:
            # Analyze image characteristics
            img_array = np.array(foreground_image.convert('RGB'))

            # === Analyze color temperature ===
            # Convert to LAB to analyze color temperature
            lab = cv2.cvtColor(img_array, cv2.COLOR_RGB2LAB)
            avg_a = np.mean(lab[:, :, 1])  # a channel: green(-) to red(+)
            avg_b = np.mean(lab[:, :, 2])  # b channel: blue(-) to yellow(+)

            # Determine warm/cool tone
            is_warm = avg_b > 128  # b > 128 means more yellow/warm

            # === Analyze brightness ===
            gray = cv2.cvtColor(img_array, cv2.COLOR_RGB2GRAY)
            avg_brightness = np.mean(gray)
            is_bright = avg_brightness > 127

            # === Get subject type from CLIP ===
            clip_analysis = self.analyze_image_with_clip(foreground_image)
            subject_type = "unknown"

            if "person" in clip_analysis.lower():
                subject_type = "person"
            elif "animal" in clip_analysis.lower():
                subject_type = "animal"
            elif "object" in clip_analysis.lower():
                subject_type = "object"
            elif "character" in clip_analysis.lower() or "cartoon" in clip_analysis.lower():
                subject_type = "character"
            elif "nature" in clip_analysis.lower() or "landscape" in clip_analysis.lower():
                subject_type = "nature"

            # === Build prompt fragments library ===
            lighting_options = {
                "warm_bright": "warm golden hour lighting, soft natural light",
                "warm_dark": "warm ambient lighting, cozy atmosphere",
                "cool_bright": "bright daylight, clear sky lighting",
                "cool_dark": "soft diffused light, gentle shadows"
            }

            atmosphere_options = {
                "person": "professional, elegant composition",
                "animal": "natural, harmonious setting",
                "object": "clean product photography style",
                "character": "artistic, vibrant, imaginative",
                "nature": "scenic, peaceful atmosphere",
                "unknown": "balanced composition"
            }

            quality_modifiers = "high quality, detailed, sharp focus, photorealistic"

            # === Select appropriate fragments ===
            # Lighting based on color temperature and brightness
            if is_warm and is_bright:
                lighting = lighting_options["warm_bright"]
            elif is_warm and not is_bright:
                lighting = lighting_options["warm_dark"]
            elif not is_warm and is_bright:
                lighting = lighting_options["cool_bright"]
            else:
                lighting = lighting_options["cool_dark"]

            # Atmosphere based on subject type
            atmosphere = atmosphere_options.get(subject_type, atmosphere_options["unknown"])

            # === Check for conflicts in user prompt ===
            user_prompt_lower = user_prompt.lower()

            # Avoid adding conflicting descriptions
            if "sunset" in user_prompt_lower or "golden" in user_prompt_lower:
                lighting = ""  # User already specified lighting
            if "dark" in user_prompt_lower or "night" in user_prompt_lower:
                lighting = lighting.replace("bright", "").replace("daylight", "")

            # === Combine enhanced prompt ===
            fragments = [user_prompt]

            if lighting:
                fragments.append(lighting)
            if atmosphere:
                fragments.append(atmosphere)
            fragments.append(quality_modifiers)

            enhanced_prompt = ", ".join(filter(None, fragments))

            logger.info(f"📝 Original prompt: {user_prompt[:50]}...")
            logger.info(f"📝 Enhanced prompt: {enhanced_prompt[:80]}...")

            return enhanced_prompt

        except Exception as e:
            logger.warning(f"⚠️ Prompt enhancement failed: {e}, using original prompt")
            return user_prompt

    def _prepare_image(self, image: Image.Image) -> Image.Image:
        """Prepare image for processing - KEEP SAME"""
        # Convert to RGB
        if image.mode != 'RGB':
            image = image.convert('RGB')

        # Resize if too large
        width, height = image.size
        max_size = self.max_image_size

        if width > max_size or height > max_size:
            ratio = min(max_size/width, max_size/height)
            new_width = int(width * ratio)
            new_height = int(height * ratio)
            image = image.resize((new_width, new_height), Image.LANCZOS)

        # Ensure dimensions are multiple of 8
        width, height = image.size
        new_width = (width // 8) * 8
        new_height = (height // 8) * 8

        if new_width != width or new_height != height:
            image = image.resize((new_width, new_height), Image.LANCZOS)

        return image

    def generate_background(
        self,
        prompt: str,
        width: int,
        height: int,
        negative_prompt: str = "blurry, low quality, distorted",
        num_inference_steps: int = 25,
        guidance_scale: float = 7.5,
        progress_callback: Optional[callable] = None
    ) -> Image.Image:
        """Generate complete background using standard text-to-image - KEEP SAME"""

        if not self.is_initialized:
            raise RuntimeError("Models not loaded. Call load_models() first.")

        logger.info(f"🎨 Generating background: {prompt[:50]}...")

        try:
            with torch.inference_mode():
                if progress_callback:
                    progress_callback("Generating background with SDXL...", 50)

                # Standard text-to-image generation - KEEP SAME
                result = self.pipeline(
                    prompt=prompt,
                    negative_prompt=negative_prompt,
                    width=width,
                    height=height,
                    num_inference_steps=num_inference_steps,
                    guidance_scale=guidance_scale,
                    generator=torch.Generator(device=self.device).manual_seed(42)
                )

                generated_image = result.images[0]

                if progress_callback:
                    progress_callback("Background generated successfully!", 100)

                logger.info("✅ Background generation completed!")
                return generated_image

        except torch.cuda.OutOfMemoryError:
            logger.error("❌ GPU memory exhausted")
            self._ultra_memory_cleanup()
            raise RuntimeError("GPU memory insufficient")

        except Exception as e:
            logger.error(f"❌ Background generation failed: {e}")
            raise RuntimeError(f"Generation failed: {str(e)}")

    def generate_and_combine(
        self,
        original_image: Image.Image,
        prompt: str,
        combination_mode: str = "center",
        focus_mode: str = "person",
        negative_prompt: str = "blurry, low quality, distorted",
        num_inference_steps: int = 25,
        guidance_scale: float = 7.5,
        progress_callback: Optional[callable] = None,
        enable_prompt_enhancement: bool = True
    ) -> Dict[str, Any]:
        """
        Generate background and combine with foreground using advanced blending.

        Args:
            original_image: Foreground image
            prompt: User's background description
            combination_mode: How to position foreground ("center", "left_half", "right_half", "full")
            focus_mode: Focus type ("person" for tight crop, "scene" for wider context)
            negative_prompt: What to avoid in generation
            num_inference_steps: SDXL inference steps
            guidance_scale: Classifier-free guidance scale
            progress_callback: Progress reporting callback
            enable_prompt_enhancement: Whether to use smart prompt enhancement

        Returns:
            Dictionary containing results and metadata
        """

        if not self.is_initialized:
            raise RuntimeError("Models not loaded. Call load_models() first.")

        logger.info(f"🎨 Starting generation and combination with advanced features...")

        try:
            # Enhanced memory management
            if self.generation_count % self.cleanup_frequency == 0:
                self._ultra_memory_cleanup()

            if progress_callback:
                progress_callback("Analyzing uploaded image...", 5)

            # Analyze original image
            image_analysis = self.analyze_image_with_clip(original_image)

            if progress_callback:
                progress_callback("Preparing images...", 10)

            # Prepare original image
            processed_original = self._prepare_image(original_image)
            target_width, target_height = processed_original.size

            if progress_callback:
                progress_callback("Optimizing prompt...", 15)

            # Smart prompt enhancement
            if enable_prompt_enhancement:
                enhanced_prompt = self.enhance_prompt(prompt, processed_original)
            else:
                enhanced_prompt = f"{prompt}, high quality, detailed, photorealistic, beautiful scenery"

            enhanced_negative = f"{negative_prompt}, people, characters, cartoons, logos"

            if progress_callback:
                progress_callback("Generating complete background scene...", 25)

            def bg_progress(msg, pct):
                if progress_callback:
                    progress_callback(f"Background: {msg}", 25 + (pct/100) * 50)

            generated_background = self.generate_background(
                prompt=enhanced_prompt,
                width=target_width,
                height=target_height,
                negative_prompt=enhanced_negative,
                num_inference_steps=num_inference_steps,
                guidance_scale=guidance_scale,
                progress_callback=bg_progress
            )

            if progress_callback:
                progress_callback("Creating intelligent mask for person detection...", 80)

            # Use intelligent mask generation with enhanced logging
            logger.info("🎭 Starting intelligent mask generation...")
            combination_mask = self.mask_generator.create_gradient_based_mask(
                processed_original,
                combination_mode,
                focus_mode
            )

            # Log mask quality for debugging
            try:
                mask_array = np.array(combination_mask)
                logger.info(f"📊 Generated mask stats - Mean: {mask_array.mean():.1f}, Non-zero pixels: {np.count_nonzero(mask_array)}")
            except Exception as mask_debug_error:
                logger.warning(f"⚠️ Mask debug logging failed: {mask_debug_error}")

            if progress_callback:
                progress_callback("Advanced image blending...", 90)

            # Use advanced image blending with logging
            logger.info("🖌️ Starting advanced image blending...")
            combined_image = self.image_blender.simple_blend_images(
                processed_original,
                generated_background,
                combination_mask
            )
            logger.info("✅ Image blending completed successfully")

            if progress_callback:
                progress_callback("Creating debug images...", 95)

            # Generate debug images
            debug_images = self.image_blender.create_debug_images(
                processed_original,
                generated_background,
                combination_mask,
                combined_image
            )

            # Memory cleanup after generation
            self._ultra_memory_cleanup()

            # Update generation count
            self.generation_count += 1

            if progress_callback:
                progress_callback("Generation complete!", 100)

            logger.info("✅ Complete generation and combination with fixed blending successful!")

            return {
                "combined_image": combined_image,
                "generated_scene": generated_background,
                "original_image": processed_original,
                "combination_mask": combination_mask,
                "debug_mask_gray": debug_images["mask_gray"],
                "debug_alpha_heatmap": debug_images["alpha_heatmap"],
                "image_analysis": image_analysis,
                "enhanced_prompt": enhanced_prompt,
                "original_prompt": prompt,
                "success": True,
                "generation_count": self.generation_count
            }

        except Exception as e:
            import traceback
            error_traceback = traceback.format_exc()
            logger.error(f"❌ Generation and combination failed: {str(e)}")
            logger.error(f"📍 Full traceback:\n{error_traceback}")
            print(f"❌ DETAILED ERROR in scene_weaver_core.generate_and_combine:")
            print(f"Error: {str(e)}")
            print(f"Traceback:\n{error_traceback}")
            self._ultra_memory_cleanup()  # Cleanup on error too
            return {
                "success": False,
                "error": f"Failed: {str(e)}"
            }

    def generate_diversity_variants(
        self,
        original_image: Image.Image,
        prompt: str,
        selected_styles: Optional[List[str]] = None,
        combination_mode: str = "center",
        focus_mode: str = "person",
        negative_prompt: str = "blurry, low quality, distorted",
        progress_callback: Optional[callable] = None
    ) -> Dict[str, Any]:
        """
        Generate multiple style variants of the background.
        Uses reduced quality for faster preview generation.

        Args:
            original_image: Foreground image
            prompt: Base background description
            selected_styles: List of style keys to use (None = all styles)
            combination_mode: Foreground positioning mode
            focus_mode: Focus type for mask generation
            negative_prompt: Base negative prompt
            progress_callback: Progress callback function

        Returns:
            Dictionary containing variants and metadata
        """
        if not self.is_initialized:
            raise RuntimeError("Models not loaded. Call load_models() first.")

        logger.info("🎨 Starting diversity generation mode...")

        # Determine which styles to generate
        styles_to_generate = selected_styles or list(self.STYLE_PRESETS.keys())
        num_styles = len(styles_to_generate)

        results = {
            "variants": [],
            "success": True,
            "num_variants": 0
        }

        try:
            # Pre-process image once
            processed_original = self._prepare_image(original_image)
            target_width, target_height = processed_original.size

            # Reduce resolution for faster generation
            preview_size = min(768, max(target_width, target_height))
            scale = preview_size / max(target_width, target_height)
            preview_width = int(target_width * scale) // 8 * 8
            preview_height = int(target_height * scale) // 8 * 8

            # Generate mask once (reusable for all variants)
            if progress_callback:
                progress_callback("Creating foreground mask...", 5)

            combination_mask = self.mask_generator.create_gradient_based_mask(
                processed_original, combination_mode, focus_mode
            )

            # Resize mask for preview resolution
            preview_mask = combination_mask.resize((preview_width, preview_height), Image.LANCZOS)
            preview_original = processed_original.resize((preview_width, preview_height), Image.LANCZOS)

            # Generate each style variant
            for idx, style_key in enumerate(styles_to_generate):
                if style_key not in self.STYLE_PRESETS:
                    logger.warning(f"⚠️ Unknown style: {style_key}, skipping")
                    continue

                style = self.STYLE_PRESETS[style_key]
                style_name = style["name"]

                if progress_callback:
                    base_pct = 10 + (idx / num_styles) * 80
                    progress_callback(f"Generating {style_name} variant...", int(base_pct))

                logger.info(f"🎨 Generating variant: {style_name}")

                try:
                    # Build style-specific prompt
                    styled_prompt = f"{prompt}, {style['modifier']}, high quality, detailed"
                    styled_negative = f"{negative_prompt}, {style['negative_extra']}, people, characters"

                    # Generate background with reduced steps for speed
                    background = self.generate_background(
                        prompt=styled_prompt,
                        width=preview_width,
                        height=preview_height,
                        negative_prompt=styled_negative,
                        num_inference_steps=15,  # Reduced for speed
                        guidance_scale=style["guidance_scale"]
                    )

                    # Blend images
                    combined = self.image_blender.simple_blend_images(
                        preview_original,
                        background,
                        preview_mask,
                        use_multi_scale=False  # Skip for speed
                    )

                    results["variants"].append({
                        "style_key": style_key,
                        "style_name": style_name,
                        "combined_image": combined,
                        "background": background,
                        "prompt_used": styled_prompt
                    })

                    # Memory cleanup between variants
                    self._ultra_memory_cleanup()

                except Exception as variant_error:
                    logger.error(f"❌ Failed to generate {style_name} variant: {variant_error}")
                    continue

            results["num_variants"] = len(results["variants"])

            if progress_callback:
                progress_callback("Diversity generation complete!", 100)

            logger.info(f"✅ Generated {results['num_variants']} style variants")
            return results

        except Exception as e:
            logger.error(f"❌ Diversity generation failed: {e}")
            self._ultra_memory_cleanup()
            return {
                "variants": [],
                "success": False,
                "error": str(e),
                "num_variants": 0
            }

    def regenerate_high_quality(
        self,
        original_image: Image.Image,
        prompt: str,
        style_key: str,
        combination_mode: str = "center",
        focus_mode: str = "person",
        negative_prompt: str = "blurry, low quality, distorted",
        progress_callback: Optional[callable] = None
    ) -> Dict[str, Any]:
        """
        Regenerate a specific style at full quality.

        Args:
            original_image: Original foreground image
            prompt: Base prompt
            style_key: Style preset key to use
            combination_mode: Foreground positioning
            focus_mode: Mask focus mode
            negative_prompt: Base negative prompt
            progress_callback: Progress callback

        Returns:
            Full quality result dictionary
        """
        if style_key not in self.STYLE_PRESETS:
            return {"success": False, "error": f"Unknown style: {style_key}"}

        style = self.STYLE_PRESETS[style_key]

        # Build styled prompt
        styled_prompt = f"{prompt}, {style['modifier']}"
        styled_negative = f"{negative_prompt}, {style['negative_extra']}"

        # Use full generate_and_combine with style parameters
        return self.generate_and_combine(
            original_image=original_image,
            prompt=styled_prompt,
            combination_mode=combination_mode,
            focus_mode=focus_mode,
            negative_prompt=styled_negative,
            num_inference_steps=25,  # Full quality
            guidance_scale=style["guidance_scale"],
            progress_callback=progress_callback,
            enable_prompt_enhancement=True
        )

    def get_memory_status(self) -> Dict[str, Any]:
        """Enhanced memory status reporting"""
        status = {"device": self.device}

        if torch.cuda.is_available():
            allocated = torch.cuda.memory_allocated() / 1024**3
            total = torch.cuda.get_device_properties(0).total_memory / 1024**3
            cached = torch.cuda.memory_reserved() / 1024**3

            status.update({
                "gpu_allocated_gb": round(allocated, 2),
                "gpu_total_gb": round(total, 2),
                "gpu_cached_gb": round(cached, 2),
                "gpu_free_gb": round(total - allocated, 2),
                "gpu_usage_percent": round((allocated / total) * 100, 1),
                "generation_count": self.generation_count
            })

        return status