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import spaces
from typing import Tuple, Union, List
import os
import time
import numpy as np
from PIL import Image

import torch

from diffusers import StableDiffusionControlNetImg2ImgPipeline, ControlNetModel, DDIMScheduler
from diffusers.pipelines.stable_diffusion import StableDiffusionSafetyChecker
from diffusers.models import AutoencoderKL
from diffusers.models.attention_processor import AttnProcessor2_0
from diffusers.pipelines.controlnet import StableDiffusionControlNetInpaintPipeline
from diffusers import ControlNetModel, UniPCMultistepScheduler, AutoPipelineForText2Image
from transformers import AutoImageProcessor, UperNetForSemanticSegmentation, AutoModelForDepthEstimation
from colors import ade_palette
from utils import map_colors_rgb
from diffusers import StableDiffusionXLPipeline
import gradio as gr
import gc

device = "cuda"
dtype = torch.float16

        
css = """
#img-display-container {
    max-height: 50vh;
    }
#img-display-input {
    max-height: 40vh;
    }
#img-display-output {
    max-height: 40vh;
    }

"""


def download_file(url, folder_path, filename):
    if not os.path.exists(folder_path):
        os.makedirs(folder_path)
    file_path = os.path.join(folder_path, filename)

    if os.path.isfile(file_path):
        print(f"File already exists: {file_path}")
    else:
        response = requests.get(url, stream=True)
        if response.status_code == 200:
            with open(file_path, 'wb') as file:
                for chunk in response.iter_content(chunk_size=1024):
                    file.write(chunk)
            print(f"File successfully downloaded and saved: {file_path}")
        else:
            print(f"Error downloading the file. Status code: {response.status_code}")

def download_models():
    models = {
        "MODEL": ("https://huggingface.co/dantea1118/juggernaut_reborn/resolve/main/juggernaut_reborn.safetensors?download=true", "models/models/Stable-diffusion", "juggernaut_reborn.safetensors"),
        "UPSCALER_X2": ("https://huggingface.co/ai-forever/Real-ESRGAN/resolve/main/RealESRGAN_x2.pth?download=true", "models/upscalers/", "RealESRGAN_x2.pth"),
        "UPSCALER_X4": ("https://huggingface.co/ai-forever/Real-ESRGAN/resolve/main/RealESRGAN_x4.pth?download=true", "models/upscalers/", "RealESRGAN_x4.pth"),
        "NEGATIVE_1": ("https://huggingface.co/philz1337x/embeddings/resolve/main/verybadimagenegative_v1.3.pt?download=true", "models/embeddings", "verybadimagenegative_v1.3.pt"),
        "NEGATIVE_2": ("https://huggingface.co/datasets/AddictiveFuture/sd-negative-embeddings/resolve/main/JuggernautNegative-neg.pt?download=true", "models/embeddings", "JuggernautNegative-neg.pt"),
        "LORA_1": ("https://huggingface.co/philz1337x/loras/resolve/main/SDXLrender_v2.0.safetensors?download=true", "models/Lora", "SDXLrender_v2.0.safetensors"),
        "LORA_2": ("https://huggingface.co/philz1337x/loras/resolve/main/more_details.safetensors?download=true", "models/Lora", "more_details.safetensors"),
        "CONTROLNET": ("https://huggingface.co/lllyasviel/ControlNet-v1-1/resolve/main/control_v11f1e_sd15_tile.pth?download=true", "models/ControlNet", "control_v11f1e_sd15_tile.pth"),
        "VAE": ("https://huggingface.co/stabilityai/sd-vae-ft-mse-original/resolve/main/vae-ft-mse-840000-ema-pruned.safetensors?download=true", "models/VAE", "vae-ft-mse-840000-ema-pruned.safetensors"),
    }

    for model, (url, folder, filename) in models.items():
        download_file(url, folder, filename)

download_models()

def timer_func(func):
    def wrapper(*args, **kwargs):
        start_time = time.time()
        result = func(*args, **kwargs)
        end_time = time.time()
        print(f"{func.__name__} took {end_time - start_time:.2f} seconds")
        return result
    return wrapper

class LazyLoadPipeline:
    def __init__(self):
        self.pipe = None

    @timer_func
    def load(self):
        if self.pipe is None:
            print("Starting to load the pipeline...")
            self.pipe = self.setup_pipeline()
            print(f"Moving pipeline to device: {device}")
            self.pipe.to(device)
            if USE_TORCH_COMPILE:
                print("Compiling the model...")
                self.pipe.unet = torch.compile(self.pipe.unet, mode="reduce-overhead", fullgraph=True)

    @timer_func
    def setup_pipeline(self):
        print("Setting up the pipeline...")
        controlnet = ControlNetModel.from_single_file(
            "models/ControlNet/control_v11f1e_sd15_tile.pth", torch_dtype=torch.float16
        )
        safety_checker = StableDiffusionSafetyChecker.from_pretrained("CompVis/stable-diffusion-safety-checker")
        model_path = "models/models/Stable-diffusion/juggernaut_reborn.safetensors"
        pipe = StableDiffusionControlNetImg2ImgPipeline.from_single_file(
            model_path,
            controlnet=controlnet,
            torch_dtype=torch.float16,
            use_safetensors=True,
            safety_checker=safety_checker
        )
        vae = AutoencoderKL.from_single_file(
            "models/VAE/vae-ft-mse-840000-ema-pruned.safetensors",
            torch_dtype=torch.float16
        )
        pipe.vae = vae
        pipe.load_textual_inversion("models/embeddings/verybadimagenegative_v1.3.pt")
        pipe.load_textual_inversion("models/embeddings/JuggernautNegative-neg.pt")
        pipe.load_lora_weights("models/Lora/SDXLrender_v2.0.safetensors")
        pipe.fuse_lora(lora_scale=0.5)
        pipe.load_lora_weights("models/Lora/more_details.safetensors")
        pipe.fuse_lora(lora_scale=1.)
        pipe.scheduler = DDIMScheduler.from_config(pipe.scheduler.config)
        pipe.enable_freeu(s1=0.9, s2=0.2, b1=1.3, b2=1.4)
        return pipe

    def __call__(self, *args, **kwargs):
        return self.pipe(*args, **kwargs)

class LazyRealESRGAN:
    def __init__(self, device, scale):
        self.device = device
        self.scale = scale
        self.model = None

    def load_model(self):
        if self.model is None:
            self.model = RealESRGAN(self.device, scale=self.scale)
            self.model.load_weights(f'models/upscalers/RealESRGAN_x{self.scale}.pth', download=False)
    def predict(self, img):
        self.load_model()
        return self.model.predict(img)

lazy_realesrgan_x2 = LazyRealESRGAN(device, scale=2)
lazy_realesrgan_x4 = LazyRealESRGAN(device, scale=4)

@timer_func
def resize_and_upscale(input_image, resolution):
    scale = 2 if resolution <= 2048 else 4
    input_image = input_image.convert("RGB")
    W, H = input_image.size
    k = float(resolution) / min(H, W)
    H = int(round(H * k / 64.0)) * 64
    W = int(round(W * k / 64.0)) * 64
    img = input_image.resize((W, H), resample=Image.LANCZOS)
    if scale == 2:
        img = lazy_realesrgan_x2.predict(img)
    else:
        img = lazy_realesrgan_x4.predict(img)
    return img

@timer_func
def create_hdr_effect(original_image, hdr):
    if hdr == 0:
        return original_image
    cv_original = cv2.cvtColor(np.array(original_image), cv2.COLOR_RGB2BGR)
    factors = [1.0 - 0.9 * hdr, 1.0 - 0.7 * hdr, 1.0 - 0.45 * hdr,
               1.0 - 0.25 * hdr, 1.0, 1.0 + 0.2 * hdr,
               1.0 + 0.4 * hdr, 1.0 + 0.6 * hdr, 1.0 + 0.8 * hdr]
    images = [cv2.convertScaleAbs(cv_original, alpha=factor) for factor in factors]
    merge_mertens = cv2.createMergeMertens()
    hdr_image = merge_mertens.process(images)
    hdr_image_8bit = np.clip(hdr_image * 255, 0, 255).astype('uint8')
    return Image.fromarray(cv2.cvtColor(hdr_image_8bit, cv2.COLOR_BGR2RGB))

lazy_pipe = LazyLoadPipeline()
lazy_pipe.load()

def prepare_image(input_image, resolution, hdr):
    condition_image = resize_and_upscale(input_image, resolution)
    condition_image = create_hdr_effect(condition_image, hdr)
    return condition_image

@spaces.GPU
@timer_func
def gradio_process_image(input_image, resolution, num_inference_steps, strength, hdr, guidance_scale):
    print("Starting image processing...")
    torch.cuda.empty_cache()
    
    condition_image = prepare_image(input_image, resolution, hdr)
    
    prompt = "masterpiece, best quality, highres"
    negative_prompt = "low quality, normal quality, ugly, blurry, blur, lowres, bad anatomy, bad hands, cropped, worst quality, verybadimagenegative_v1.3, JuggernautNegative-neg"
    
    options = {
        "prompt": prompt,
        "negative_prompt": negative_prompt,
        "image": condition_image,
        "control_image": condition_image,
        "width": condition_image.size[0],
        "height": condition_image.size[1],
        "strength": strength,
        "num_inference_steps": num_inference_steps,
        "guidance_scale": guidance_scale,
        "generator": torch.Generator(device=device).manual_seed(0),
    }
    
    print("Running inference...")
    result = lazy_pipe(**options).images[0]
    print("Image processing completed successfully")
    
    # Convert input_image and result to numpy arrays
    input_array = np.array(input_image)
    result_array = np.array(result)
    
    return [input_array, result_array]
    


def filter_items(
    colors_list: Union[List, np.ndarray],
    items_list: Union[List, np.ndarray],
    items_to_remove: Union[List, np.ndarray]
) -> Tuple[Union[List, np.ndarray], Union[List, np.ndarray]]:
    """
    Filters items and their corresponding colors from given lists, excluding
    specified items.

    Args:
        colors_list: A list or numpy array of colors corresponding to items.
        items_list: A list or numpy array of items.
        items_to_remove: A list or numpy array of items to be removed.

    Returns:
        A tuple of two lists or numpy arrays: filtered colors and filtered
        items.
    """
    filtered_colors = []
    filtered_items = []
    for color, item in zip(colors_list, items_list):
        if item not in items_to_remove:
            filtered_colors.append(color)
            filtered_items.append(item)
    return filtered_colors, filtered_items

def get_segmentation_pipeline(
) -> Tuple[AutoImageProcessor, UperNetForSemanticSegmentation]:
    """Method to load the segmentation pipeline
    Returns:
        Tuple[AutoImageProcessor, UperNetForSemanticSegmentation]: segmentation pipeline
    """
    image_processor = AutoImageProcessor.from_pretrained(
        "openmmlab/upernet-convnext-xlarge"
    )
    image_segmentor = UperNetForSemanticSegmentation.from_pretrained(
        "openmmlab/upernet-convnext-xlarge"
    )
    return image_processor, image_segmentor


@torch.inference_mode()
@spaces.GPU
def segment_image(
        image: Image,
        image_processor: AutoImageProcessor,
        image_segmentor: UperNetForSemanticSegmentation
) -> Image:
    """
    Segments an image using a semantic segmentation model.

    Args:
        image (Image): The input image to be segmented.
        image_processor (AutoImageProcessor): The processor to prepare the
            image for segmentation.
        image_segmentor (UperNetForSemanticSegmentation): The semantic
            segmentation model used to identify different segments in the image.

    Returns:
        Image: The segmented image with each segment colored differently based
            on its identified class.
    """
    # image_processor, image_segmentor = get_segmentation_pipeline()
    pixel_values = image_processor(image, return_tensors="pt").pixel_values
    with torch.no_grad():
        outputs = image_segmentor(pixel_values)

    seg = image_processor.post_process_semantic_segmentation(
        outputs, target_sizes=[image.size[::-1]])[0]
    color_seg = np.zeros((seg.shape[0], seg.shape[1], 3), dtype=np.uint8)
    palette = np.array(ade_palette())
    for label, color in enumerate(palette):
        color_seg[seg == label, :] = color
    color_seg = color_seg.astype(np.uint8)
    seg_image = Image.fromarray(color_seg).convert('RGB')
    return seg_image


def get_depth_pipeline():
    feature_extractor = AutoImageProcessor.from_pretrained("LiheYoung/depth-anything-large-hf",
                                                           torch_dtype=dtype)
    depth_estimator = AutoModelForDepthEstimation.from_pretrained("LiheYoung/depth-anything-large-hf",
                                                                  torch_dtype=dtype)
    return feature_extractor, depth_estimator


@torch.inference_mode()
@spaces.GPU
def get_depth_image(
        image: Image,
        feature_extractor: AutoImageProcessor,
        depth_estimator: AutoModelForDepthEstimation
) -> Image:
    image_to_depth = feature_extractor(images=image, return_tensors="pt").to(device)
    with torch.no_grad():
        depth_map = depth_estimator(**image_to_depth).predicted_depth

    width, height = image.size
    depth_map = torch.nn.functional.interpolate(
        depth_map.unsqueeze(1).float(),
        size=(height, width),
        mode="bicubic",
        align_corners=False,
    )
    depth_min = torch.amin(depth_map, dim=[1, 2, 3], keepdim=True)
    depth_max = torch.amax(depth_map, dim=[1, 2, 3], keepdim=True)
    depth_map = (depth_map - depth_min) / (depth_max - depth_min)
    image = torch.cat([depth_map] * 3, dim=1)

    image = image.permute(0, 2, 3, 1).cpu().numpy()[0]
    image = Image.fromarray((image * 255.0).clip(0, 255).astype(np.uint8))
    return image


def resize_dimensions(dimensions, target_size):
    """ 
    Resize PIL to target size while maintaining aspect ratio 
    If smaller than target size leave it as is
    """
    width, height = dimensions

    # Check if both dimensions are smaller than the target size
    if width < target_size and height < target_size:
        return dimensions

    # Determine the larger side
    if width > height:
        # Calculate the aspect ratio
        aspect_ratio = height / width
        # Resize dimensions
        return (target_size, int(target_size * aspect_ratio))
    else:
        # Calculate the aspect ratio
        aspect_ratio = width / height
        # Resize dimensions
        return (int(target_size * aspect_ratio), target_size)


def flush():
    gc.collect()
    torch.cuda.empty_cache()
    
    
class ControlNetDepthDesignModelMulti:
    """ Produces random noise images """
    
    def __init__(self):
        """ Initialize your model(s) here """
        #os.environ['HF_HUB_OFFLINE'] = "True"
        
        self.seed = 323*111
        self.neg_prompt = "window, door, low resolution, banner, logo, watermark, text, deformed, blurry, out of focus, surreal, ugly, beginner"
        self.control_items = ["windowpane;window", "door;double;door"]
        self.additional_quality_suffix = "interior design, 4K, high resolution, photorealistic"
        
    @spaces.GPU
    def generate_design(self, empty_room_image: Image, prompt: str, guidance_scale: int = 10, num_steps: int = 50, strength: float =0.9, img_size: int = 640) -> Image:
        """
        Given an image of an empty room and a prompt
        generate the designed room according to the prompt
        Inputs - 
            empty_room_image - An RGB PIL Image of the empty room
            prompt - Text describing the target design elements of the room
        Returns - 
            design_image - PIL Image of the same size as the empty room image
                           If the size is not the same the submission will fail.
        """
        print(prompt)
        flush()
        self.generator = torch.Generator(device=device).manual_seed(self.seed)

        pos_prompt = prompt + f', {self.additional_quality_suffix}'

        orig_w, orig_h = empty_room_image.size
        new_width, new_height = resize_dimensions(empty_room_image.size, img_size)
        input_image = empty_room_image.resize((new_width, new_height))
        real_seg = np.array(segment_image(input_image,
                                          seg_image_processor,
                                          image_segmentor))
        unique_colors = np.unique(real_seg.reshape(-1, real_seg.shape[2]), axis=0)
        unique_colors = [tuple(color) for color in unique_colors]
        segment_items = [map_colors_rgb(i) for i in unique_colors]
        chosen_colors, segment_items = filter_items(
            colors_list=unique_colors,
            items_list=segment_items,
            items_to_remove=self.control_items
        )
        mask = np.zeros_like(real_seg)
        for color in chosen_colors:
            color_matches = (real_seg == color).all(axis=2)
            mask[color_matches] = 1

        image_np = np.array(input_image)
        image = Image.fromarray(image_np).convert("RGB")
        mask_image = Image.fromarray((mask * 255).astype(np.uint8)).convert("RGB")
        segmentation_cond_image = Image.fromarray(real_seg).convert("RGB")

        image_depth = get_depth_image(image, depth_feature_extractor, depth_estimator)

        # generate image that would be used as IP-adapter
        flush()
        new_width_ip = int(new_width / 8) * 8
        new_height_ip = int(new_height / 8) * 8
        ip_image = guide_pipe(pos_prompt,
                                   num_inference_steps=num_steps,
                                   negative_prompt=self.neg_prompt,
                                   height=new_height_ip,
                                   width=new_width_ip,
                                   generator=[self.generator]).images[0]

        flush()
        generated_image = pipe(
            prompt=pos_prompt,
            negative_prompt=self.neg_prompt,
            num_inference_steps=num_steps,
            strength=strength,
            guidance_scale=guidance_scale,
            generator=[self.generator],
            image=image,
            mask_image=mask_image,
            ip_adapter_image=ip_image,
            control_image=[image_depth, segmentation_cond_image],
            controlnet_conditioning_scale=[0.5, 0.5]
        ).images[0]
        
        flush()
        design_image = generated_image.resize(
            (orig_w, orig_h), Image.Resampling.LANCZOS
        )
        
        return design_image


def create_demo(model):
    gr.Markdown("### Just try zeroGPU")
    with gr.Row():
        with gr.Column():
            input_image = gr.Image(label="Input Image", type='pil', elem_id='img-display-input')
            input_text = gr.Textbox(label='Prompt', placeholder='Please upload your image first', lines=2)
            with gr.Accordion('Advanced options', open=False):
                
                num_steps = gr.Slider(label='Steps',
                                      minimum=1,
                                      maximum=50,
                                      value=50,
                                      step=1)
                img_size = gr.Slider(label='Image size',
                                      minimum=256,
                                      maximum=768,
                                      value=768,
                                      step=64)
                guidance_scale = gr.Slider(label='Guidance Scale',
                                           minimum=0.1,
                                           maximum=30.0,
                                           value=10.0,
                                           step=0.1)
                seed = gr.Slider(label='Seed',
                                 minimum=-1,
                                 maximum=2147483647,
                                 value=323*111,
                                 step=1,
                                 randomize=True)
                strength = gr.Slider(label='Strength',
                                           minimum=0.1,
                                           maximum=1.0,
                                           value=0.9,
                                           step=0.1)
                a_prompt = gr.Textbox(
                    label='Added Prompt',
                    value="interior design, 4K, high resolution, photorealistic")
                n_prompt = gr.Textbox(
                    label='Negative Prompt',
                    value="window, door, low resolution, banner, logo, watermark, text, deformed, blurry, out of focus, surreal, ugly, beginner")

                resolution = gr.Slider(minimum=256, maximum=2048, value=512, step=256, label="Resolution")
                num_inference_steps = gr.Slider(minimum=1, maximum=50, value=20, step=1, label="Number of Inference Steps")
                strength = gr.Slider(minimum=0, maximum=1, value=0.4, step=0.01, label="Strength")
                hdr = gr.Slider(minimum=0, maximum=1, value=0, step=0.1, label="HDR Effect")
                guidance_scale = gr.Slider(minimum=0, maximum=20, value=3, step=0.5, label="Guidance Scale")
        
            submit = gr.Button("Submit")
        
        with gr.Column():
            design_image = gr.Image(label="Output Mask", elem_id='img-display-output')
    
    
    def on_submit(image, text, num_steps, guidance_scale, seed, strength, a_prompt, n_prompt, img_size):
        model.seed = seed
        model.neg_prompt = n_prompt
        model.additional_quality_suffix = a_prompt
        
        with torch.no_grad():
            out_img = model.generate_design(image, text, guidance_scale=guidance_scale, num_steps=num_steps, strength=strength, img_size=img_size)

        return out_img

    submit.click(on_submit, inputs=[input_image, input_text, num_steps, guidance_scale, seed, strength, a_prompt, n_prompt, img_size], outputs=design_image)
    examples = gr.Examples(examples=[["imgs/bedroom_1.jpg", "An elegantly appointed bedroom in the Art Deco style, featuring a grand king-size bed with geometric bedding, a luxurious velvet armchair, and a mirrored nightstand that reflects the room's opulence. Art Deco-inspired artwork adds a touch of glamour"], ["imgs/bedroom_2.jpg", "A bedroom that exudes French country charm with a soft upholstered bed, walls adorned with floral wallpaper, and a vintage wooden wardrobe. A crystal chandelier casts a warm, inviting glow over the space"], ["imgs/dinning_room_1.jpg", "A cozy dining room that captures the essence of rustic charm with a solid wooden farmhouse table at its core, surrounded by an eclectic mix of mismatched chairs. An antique sideboard serves as a statement piece, and the ambiance is warmly lit by a series of quaint Edison bulbs dangling from the ceiling"], ["imgs/dinning_room_3.jpg", "A dining room that epitomizes contemporary elegance, anchored by a sleek, minimalist dining table paired with stylish modern chairs. Artistic lighting fixtures create a focal point above, while the surrounding minimalist decor ensures the space feels open, airy, and utterly modern"], ["imgs/image_1.jpg", "A glamorous master bedroom in Hollywood Regency style, boasting a plush tufted headboard, mirrored furniture reflecting elegance, luxurious fabrics in rich textures, and opulent gold accents for a touch of luxury."], ["imgs/image_2.jpg", "A vibrant living room with a tropical theme, complete with comfortable rattan furniture, large leafy plants bringing the outdoors in, bright cushions adding pops of color, and bamboo blinds for natural light control."], ["imgs/living_room_1.jpg", "A stylish living room embracing mid-century modern aesthetics, featuring a vintage teak coffee table at its center, complemented by a classic sunburst clock on the wall and a cozy shag rug underfoot, creating a warm and inviting atmosphere"]],
                           inputs=[input_image, input_text], cache_examples=False)



controlnet_depth= ControlNetModel.from_pretrained(
    "controlnet_depth", torch_dtype=dtype, use_safetensors=True)
controlnet_seg = ControlNetModel.from_pretrained(
    "own_controlnet", torch_dtype=dtype, use_safetensors=True)

pipe = StableDiffusionControlNetInpaintPipeline.from_pretrained(
    "SG161222/Realistic_Vision_V6.0_B1_noVAE",
    #"models/runwayml--stable-diffusion-inpainting",
    controlnet=[controlnet_depth, controlnet_seg],
    safety_checker=None,
    torch_dtype=dtype
)

pipe.load_ip_adapter("h94/IP-Adapter", subfolder="models",
                     weight_name="ip-adapter_sd15.bin")
pipe.set_ip_adapter_scale(0.4)
pipe.scheduler = UniPCMultistepScheduler.from_config(pipe.scheduler.config)
pipe = pipe.to(device)
guide_pipe = StableDiffusionXLPipeline.from_pretrained("segmind/SSD-1B",
                                                       torch_dtype=dtype, use_safetensors=True, variant="fp16")
guide_pipe = guide_pipe.to(device)
   
seg_image_processor, image_segmentor = get_segmentation_pipeline()
depth_feature_extractor, depth_estimator = get_depth_pipeline()
depth_estimator = depth_estimator.to(device)



def main():
    model = ControlNetDepthDesignModelMulti()
    print('Models uploaded successfully')
    
    title = "# Just try zeroGPU"
    description = """
    For test only
    """
    with gr.Blocks() as demo:
        gr.Markdown(title)
        gr.Markdown(description)        


    demo.queue().launch(share=False)


if __name__ == '__main__':
    main()