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import requests
import gradio as gr
import zipfile
import os
import tempfile
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) -> str:
    # ์ž„์‹œ ํŒŒ์ผ ์ƒ์„ฑ
    with tempfile.NamedTemporaryFile(delete=False, suffix=".zip") as temp_zip:
        with zipfile.ZipFile(temp_zip, '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())
        
        # ์ž„์‹œ ํŒŒ์ผ์˜ ๊ฒฝ๋กœ๋ฅผ ๋ฐ˜ํ™˜
        temp_zip_path = temp_zip.name
    
    return temp_zip_path

def image_processing_single(background_image: Image.Image, product_image_url: str):
    # ๊ฐ์ข… ์„ค์ • ๊ฐ’
    background_image_size = 1024 # ๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€์˜ ํฌ๊ธฐ
    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„)
    
    # ๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€ ํฌ๊ธฐ ์กฐ์ •
    background_image = background_image.resize((background_image_size, background_image_size))
    
    # ์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]
    zip_file_path = create_zip_file(image_list)
    
    return image_list, zip_file_path

def image_processing_batch(background_image: Image.Image, product_image_url_file_path: 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„)
    
    # file to url
    def file_to_list(file_path: str) -> list:
        # ํŒŒ์ผ์„ ์—ด๊ณ  ์ฝ๊ธฐ
        with open(file_path, "r") as f:
            # ํŒŒ์ผ ๋‚ด์šฉ์„ ์ฝ์–ด์„œ ์ค„๋ฐ”๊ฟˆ(์—”ํ„ฐ)๋กœ ๊ตฌ๋ถ„๋œ ๊ฐ URL์„ ๋ฆฌ์ŠคํŠธ๋กœ ๋ณ€ํ™˜
            content = f.read()
            # ์ค„๋ฐ”๊ฟˆ์œผ๋กœ URL ๋ถ„๋ฆฌ
            url_list = [url.strip() for url in content.splitlines() if url.strip()]

        return url_list
    
    product_image_url_list = file_to_list(product_image_url_file_path)
    
    preview_image_list, image_list = [], []
    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)
        
        image_list.append(type_a_image)
        image_list.append(type_b_image)
        image_list.append(type_c_image)
        if idx == 0:
            preview_image_list = [type_a_image, type_b_image, type_c_image]
            
    zip_file_path = create_zip_file(image_list)
    
    return preview_image_list, zip_file_path
        

with gr.Blocks(theme=gr.themes.Monochrome()) as demo:
    gr.HTML("""
        <h1>Product Image Generator</h1>
        <p>1. ๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€๋ฅผ ์—…๋กœ๋“œํ•ด์ฃผ์„ธ์š”.<p>
        <p>2-1. Single ๋ชจ๋“œ์˜ ๊ฒฝ์šฐ, ์ด๋ฏธ์ง€์˜ ๋งํฌ๋ฅผ ์ž…๋ ฅํ•ด์ฃผ์„ธ์š”.<p>
        <p>2-2. Batch ๋ชจ๋“œ์˜ ๊ฒฝ์šฐ, ์ด๋ฏธ์ง€ ๋งํฌ๋“ค์ด ํฌํ•จ๋œ .txt ํŒŒ์ผ(ํ˜•์‹ = ๋งํฌ1(์—”ํ„ฐ) ๋งํฌ2(์—”ํ„ฐ) ..)์„ ์—…๋กœ๋“œํ•ด์ฃผ์„ธ์š”.<p>
        <p>3. Generate Images ๋ฒ„ํŠผ์„ ๋ˆŒ๋Ÿฌ ์ œํ’ˆ ์ด๋ฏธ์ง€๋ฅผ ์ƒ์„ฑํ•ด์ฃผ์„ธ์š”.<p>
    """)
    
    with gr.Row(elem_classes="input_box"):
        with gr.Column():
            background_image = gr.Image(label="Background Image", type="pil", height=300)
            gr.Examples(
                examples=[["examples/background_1.png"], ["examples/background_2.png"], ["examples/background_3.png"], ["examples/background_4.png"]], # ์˜ˆ์ œ ์ด๋ฏธ์ง€ ๊ฒฝ๋กœ ๋ฆฌ์ŠคํŠธ
                inputs=background_image,  # ์˜ˆ์ œ๋ฅผ ํด๋ฆญํ–ˆ์„ ๋•Œ ํ•ด๋‹น ์ด๋ฏธ์ง€๊ฐ€ ์ด input์— ์ ์šฉ๋จ
                label="์˜ˆ์ œ ๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€")
        with gr.Tab("Single Mode"):
            with gr.Column():
                link = gr.Textbox(label="Image URL")
                gr.Examples(
                    examples=["https://url.kr/yx85be", "https://url.kr/if4wxo"],
                    inputs=link,
                    label="์˜ˆ์ œ ์ด๋ฏธ์ง€ ๋งํฌ"
                )
            btn_single = gr.Button("Generate Images")
        with gr.Tab("Batch Mode"):
            gr.HTML("<div>๋งํฌ1(์—”ํ„ฐ) ๋งํฌ2(์—”ํ„ฐ) ... ์œผ๋กœ ๊ตฌ์„ฑ๋œ .txt ํŒŒ์ผ์„ ์—…๋กœ๋“œ</div>")
            with gr.Column():
                links = gr.File(label="Image URLs (.txt file)", height=100)
                gr.Examples(
                    examples=[["examples/links.txt"]],
                    inputs=links,
                    label="์˜ˆ์ œ .txt ํŒŒ์ผ"
                )
            btn_batch = gr.Button("Generate Images")
                
    gr.HTML("""
        <br><br>
        <h1>์ƒ์„ฑ ๊ฒฐ๊ณผ ํ™•์ธ</h1>
        <p>์ƒ์„ฑ์€ 1๊ฐœ ์ด๋ฏธ์ง€ ๋‹น 15~30์ดˆ ์†Œ์š”๋˜๋ฉฐ(๋ฐฐ๊ฒฝ์ œ๊ฑฐ AI ๋ชจ๋“ˆ ์ฒ˜๋ฆฌ์‹œ๊ฐ„), ๊ฒฐ๊ณผ๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™์ด ์ œ๊ณต๋ฉ๋‹ˆ๋‹ค.</p>
        <p>1. ์ฒซ๋ฒˆ์งธ ์ด๋ฏธ์ง€์— ๋Œ€ํ•œ ํ”„๋ฆฌ๋ทฐ(3๊ฐœ ํƒ€์ž…)</p> 
        <p>2. ๊ฒฐ๊ณผ ์ด๋ฏธ์ง€ ์ „์ฒด๊ฐ€ ๋‹ด๊ธด ZIP ํŒŒ์ผ(results.zip) ๋‹ค์šด๋กœ๋“œ ๋งํฌ๊ฐ€ ์ œ๊ณต๋ฉ๋‹ˆ๋‹ค</p>
    """)

    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, output_zip], api_name="image_processing_single")
    btn_batch.click(fn=image_processing_batch, inputs=[background_image, links], outputs=[preview, output_zip], api_name="image_processing_batch")

demo.launch()