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import requests
import gradio as gr
import zipfile
from PIL import Image
from io import BytesIO
from rembg import remove

def download_image(image_url: str) -> Image.Image:
    # ์ด๋ฏธ์ง€ ๋‹ค์šด๋กœ๋“œ
    response = requests.get(image_url)
    
    if response.status_code == 200:
        original_image = Image.open(BytesIO(response.content))
        return original_image
    else:
        raise Exception(f"Failed to download image. Status code: {response.status_code}")

def remove_background(image: Image.Image) -> Image.Image:
    # ์ด๋ฏธ์ง€ ๋ˆ„๋ผ๋”ฐ๊ธฐ
    try:
        removebg_image = remove(
            image,
            post_process_mask=True,
            alpha_matting=True, 
            alpha_matting_foreground_threshold=270,
            alpha_matting_background_threshold=30, 
            alpha_matting_erode_size=15)
        return removebg_image
    
    except Exception as e:
        print(f"Failed to remove background: {e}")
        return None
    
def crop_image(image: Image.Image) -> Image.Image:
    # ์ด๋ฏธ์ง€ ํฌ๋กญ
    try:
        # ์•ŒํŒŒ ์ฑ„๋„์„ ์‚ฌ์šฉํ•˜์—ฌ ์ด๋ฏธ์ง€์˜ ๊ฒฝ๊ณ„ ์˜์—ญ ์ฐพ๊ธฐ
        bbox = image.getbbox()
        if bbox:
            # ๊ฒฝ๊ณ„ ์ƒ์ž๋กœ ์ด๋ฏธ์ง€ ํฌ๋กญ
            cropped_image = image.crop(bbox)
            return cropped_image
        else:
            print("No bounding box found.")
            return image
    
    except Exception as e:
        print(f"Failed to crop image: {e}")
        return None
      
def resize_image(image: Image.Image, max_size: int) -> Image.Image:
    # ์ด๋ฏธ์ง€ ํฌ๊ธฐ ์กฐ์ •
    try:
        # ์ด๋ฏธ์ง€์˜ ํ˜„์žฌ ๋„ˆ๋น„์™€ ๋†’์ด ๊ฐ€์ ธ์˜ค๊ธฐ
        width, height = image.size
        
        # ๋„ˆ๋น„์™€ ๋†’์ด ์ค‘ ๋” ํฐ ์ชฝ์˜ ๋น„์œจ์— ๋งž์ถฐ ํฌ๊ธฐ๋ฅผ ์กฐ์ •
        if width > height:
            new_width = max_size
            new_height = int((max_size / width) * height)
        else:
            new_height = max_size
            new_width = int((max_size / height) * width)
        
        resized_image = image.resize((new_width, new_height))
        return resized_image
    
    except Exception as e:
        print(f"Failed to resize image: {e}")
        return None
    
def paste_to_background_type_a(background: Image.Image, product: Image.Image) -> Image.Image:
    # ๋ฐฐ๊ฒฝ์— ์ œํ’ˆ ์ด๋ฏธ์ง€ ํ•ฉ์„ฑ
    try:
        # ๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€ ํฌ๊ธฐ ๊ฐ€์ ธ์˜ค๊ธฐ
        bg_width, bg_height = background.size
        
        # ์ œํ’ˆ ์ด๋ฏธ์ง€ ํฌ๊ธฐ ๊ฐ€์ ธ์˜ค๊ธฐ
        product_width, product_height = product.size
        
        # ์ œํ’ˆ ์ด๋ฏธ์ง€๋ฅผ ๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€ ์ค‘์•™์— ์œ„์น˜์‹œํ‚ค๊ธฐ
        offset = ((bg_width - product_width) // 2, (bg_height - product_height) // 2)
        
        # ์•ŒํŒŒ ์ฑ„๋„์„ ๊ณ ๋ คํ•˜์—ฌ ํ•ฉ์„ฑ
        background.paste(product, offset, mask=product)
        return background
    
    except Exception as e:
        print(f"Failed to paste product image to background: {e}")
        return None
    
def paste_to_background_type_b(background: Image.Image, product: Image.Image, margin: int = 10) -> Image.Image:
    try:
        # ๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€ ํฌ๊ธฐ ๊ฐ€์ ธ์˜ค๊ธฐ
        bg_width, bg_height = background.size
        
        # ์ œํ’ˆ ์ด๋ฏธ์ง€ ํฌ๊ธฐ ๊ฐ€์ ธ์˜ค๊ธฐ
        product_width, product_height = product.size
        
        # ๋‘ ์ œํ’ˆ ์ด๋ฏธ์ง€๋ฅผ ์œ„ํ•œ ์ „์ฒด ๋„ˆ๋น„ ๊ณ„์‚ฐ (์ œํ’ˆ ์ด๋ฏธ์ง€ ๋‘ ๊ฐœ + ๋งˆ์ง„)
        total_width = (product_width * 2) + margin
        
        if total_width > bg_width:
            raise ValueError("Background is too narrow to fit two product images with the specified margin.")
        
        # ์ฒซ ๋ฒˆ์งธ ์ œํ’ˆ ์ด๋ฏธ์ง€์˜ ์™ผ์ชฝ ์ƒ๋‹จ ์ขŒํ‘œ ๊ณ„์‚ฐ
        left_offset = (bg_width - total_width) // 2
        top_offset = (bg_height - product_height) // 2
        
        # ๋‘ ๋ฒˆ์งธ ์ œํ’ˆ ์ด๋ฏธ์ง€์˜ ์™ผ์ชฝ ์ƒ๋‹จ ์ขŒํ‘œ ๊ณ„์‚ฐ
        right_offset = left_offset + product_width + margin
        
        # ์ฒซ ๋ฒˆ์งธ ์ œํ’ˆ ์ด๋ฏธ์ง€ ๋ฐฐ๊ฒฝ์— ํ•ฉ์„ฑ
        background.paste(product, (left_offset, top_offset), mask=product)
        
        # ๋‘ ๋ฒˆ์งธ ์ œํ’ˆ ์ด๋ฏธ์ง€ ๋ฐฐ๊ฒฝ์— ํ•ฉ์„ฑ
        background.paste(product, (right_offset, top_offset), mask=product)
        return background
    
    except Exception as e:
        print(f"Failed to paste product images to background: {e}")
        return None

def paste_to_background_type_c(background: Image.Image, product: Image.Image, margin: int = 10, top_margin: int = 15) -> Image.Image:
    try:
        # ๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€ ํฌ๊ธฐ ๊ฐ€์ ธ์˜ค๊ธฐ
        bg_width, bg_height = background.size
        
        # ์ œํ’ˆ ์ด๋ฏธ์ง€ ํฌ๊ธฐ ๊ฐ€์ ธ์˜ค๊ธฐ
        product_width, product_height = product.size
        
        # ๋จผ์ € type_b ํ˜•ํƒœ๋กœ ์•„๋ž˜ ๋‘ ์ œํ’ˆ ์ด๋ฏธ์ง€๋ฅผ ๋ฐฐ์น˜
        background_with_two_products = paste_to_background_type_b(background, product, margin)

        # ์ค‘์•™ ์ƒ๋‹จ์— ์œ„์น˜ํ•  ์ œํ’ˆ ์ด๋ฏธ์ง€์˜ ์˜คํ”„์…‹ ๊ณ„์‚ฐ
        center_offset_x = (bg_width - product_width) // 2
        center_offset_y = ((bg_height - product_height) // 2) + top_margin
        
        if center_offset_y < 0:
            raise ValueError("Background is too small to fit three product images with the specified top margin.")
        
        # ์„ธ ๋ฒˆ์งธ ์ œํ’ˆ ์ด๋ฏธ์ง€ ๋ฐฐ๊ฒฝ์— ํ•ฉ์„ฑ (์ค‘์•™ ์ƒ๋‹จ)
        background_with_two_products.paste(product, (center_offset_x, center_offset_y), mask=product)
        
        # ๊ฒฐ๊ณผ ์ด๋ฏธ์ง€ ์ €์žฅ ๋ฐ ๋ฐ˜ํ™˜
        return background_with_two_products
    
    except Exception as e:
        print(f"Failed to paste product images to background: {e}")
        return None
    
def create_zip_file(images: list, zip_filename: str = "images.zip") -> bytes:
    # ๋ฉ”๋ชจ๋ฆฌ ๋‚ด์—์„œ ZIP ํŒŒ์ผ ์ƒ์„ฑ
    zip_buffer = BytesIO()
    
    with zipfile.ZipFile(zip_buffer, 'w', zipfile.ZIP_DEFLATED) as zipf:
        for i, image in enumerate(images):
            # ์ด๋ฏธ์ง€๋ฅผ ๋ฉ”๋ชจ๋ฆฌ ๋ฒ„ํผ์— ์ €์žฅ
            image_buffer = BytesIO()
            image.save(image_buffer, format="PNG")
            image_buffer.seek(0)
            
            # ๋ฒ„ํผ ๋‚ด์šฉ์„ ZIP ํŒŒ์ผ์— ์ถ”๊ฐ€
            zipf.writestr(f"image_{i + 1}.png", image_buffer.getvalue())
    
    # ZIP ํŒŒ์ผ ๋ฐ์ดํ„ฐ๋ฅผ ๋ฐ˜ํ™˜
    zip_buffer.seek(0)
    return zip_buffer.getvalue()

def image_processing_single(background_image: Image.Image, product_image_url: str):
    # ๊ฐ์ข… ์„ค์ • ๊ฐ’
    product_image_size = 650 # ๋ฐฐ๊ฒฝ์ด ์ œ๊ฑฐ๋œ ์ œํ’ˆ ์ด๋ฏธ์ง€์˜ ํฌ๊ธฐ
    type_b_margin = 15
    type_c_margin_1, type_c_margin_2 = 15, 45 # (1=๊ฐ€์šด๋ฐ ๋‘๊ฐœ์˜ ๋งˆ์ง„, 2= ์ค‘์•™ ํ•œ๊ฐœ์˜ top ๋งˆ์ง„)
    
    # ์ด๋ฏธ์ง€ ๋‹ค์šด๋กœ๋“œ
    original_image = download_image(product_image_url)

    # ์ด๋ฏธ์ง€ ๋ˆ„๋ผ๋”ฐ๊ธฐ
    removebg_image = remove_background(original_image)
    
    # ์ด๋ฏธ์ง€ ํฌ๋กญ
    cropped_image = crop_image(removebg_image)
    
    # ํฌ๋กญ๋œ ์ด๋ฏธ์ง€ ์›ํ•˜๋Š” ์‚ฌ์ด์ฆˆ๋กœ resize
    resized_image = resize_image(cropped_image, product_image_size)
    
    # type_a ํ•ฉ์„ฑ
    type_a_image = paste_to_background_type_a(background_image.copy(), resized_image)
    type_b_image = paste_to_background_type_b(background_image.copy(), resized_image, type_b_margin)
    type_c_image = paste_to_background_type_c(background_image.copy(), resized_image, type_c_margin_1, type_c_margin_2)
    
    # ๊ฒฐ๊ณผ ์ด๋ฏธ์ง€ ๋ฐ˜ํ™˜
    image_list = [type_a_image, type_b_image, type_c_image]
    image_zip_file = create_zip_file(image_list)
    
    return image_list #, image_zip_file

def image_processing_multi(background_image: Image.Image, product_image_url_list: list):
    # ๊ฐ์ข… ์„ค์ • ๊ฐ’
    product_image_size = 650 # ๋ฐฐ๊ฒฝ์ด ์ œ๊ฑฐ๋œ ์ œํ’ˆ ์ด๋ฏธ์ง€์˜ ํฌ๊ธฐ
    type_b_margin = 15
    type_c_margin_1, type_c_margin_2 = 15, 45 # (1=๊ฐ€์šด๋ฐ ๋‘๊ฐœ์˜ ๋งˆ์ง„, 2= ์ค‘์•™ ํ•œ๊ฐœ์˜ top ๋งˆ์ง„)
    
    for idx, product_image_url in enumerate(product_image_url_list):
        # ์ด๋ฏธ์ง€ ๋‹ค์šด๋กœ๋“œ
        original_image = download_image(product_image_url)

        # ์ด๋ฏธ์ง€ ๋ˆ„๋ผ๋”ฐ๊ธฐ
        removebg_image = remove_background(original_image)
        
        # ์ด๋ฏธ์ง€ ํฌ๋กญ
        cropped_image = crop_image(removebg_image)
        
        # ํฌ๋กญ๋œ ์ด๋ฏธ์ง€ ์›ํ•˜๋Š” ์‚ฌ์ด์ฆˆ๋กœ resize
        resized_image = resize_image(cropped_image, product_image_size)
        
        # type_a ํ•ฉ์„ฑ
        type_a_image = paste_to_background_type_a(background_image.copy(), resized_image)
        type_b_image = paste_to_background_type_b(background_image.copy(), resized_image, type_b_margin)
        type_c_image = paste_to_background_type_c(background_image.copy(), resized_image, type_c_margin_1, type_c_margin_2)
        

with gr.Blocks(theme=gr.themes.Monochrome()) as demo:
    with gr.Row():
        background_image = gr.Image(label="Background Image", type="pil")
        with gr.Tab("Single"):
            link = gr.Textbox(label="Image URL")
            btn_single = gr.Button("Generate Images")
        with gr.Tab("Multi"):
            links = gr.File(label="Image URLs (.txt file)")
            btn_multi = gr.Button("Generate Images")
    
    with gr.Row():
        preview = gr.Gallery(label="Generated images", show_label=False, elem_id="gallery", columns=[3], rows=[1], object_fit="contain", height="auto")
        output_zip = gr.File(label="Download Result Zip File")
        
    # evnets
    btn_single.click(fn=image_processing_single, inputs=[background_image, link], outputs=[preview], api_name="image_processing")

demo.launch()