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import json
import os
import time
import tempfile
from PIL import Image
import gradio as gr
import logging
import io

from google import genai
from google.genai import types

# .env ํŒŒ์ผ์— ์ €์žฅ๋œ ํ™˜๊ฒฝ๋ณ€์ˆ˜ ๋กœ๋“œ (python-dotenv ์„ค์น˜ ํ•„์š”: pip install python-dotenv)
from dotenv import load_dotenv
load_dotenv()

# ๋กœ๊น… ์„ค์ • (๋กœ๊ทธ ๋ ˆ๋ฒจ: DEBUG)
logging.basicConfig(level=logging.DEBUG,
                    format='%(asctime)s - %(levelname)s - %(message)s')
logger = logging.getLogger(__name__)


def save_binary_file(file_name, data):
    logger.debug(f"ํŒŒ์ผ์— ์ด์ง„ ๋ฐ์ดํ„ฐ ์ €์žฅ ์ค‘: {file_name}")
    with open(file_name, "wb") as f:
        f.write(data)
    logger.debug(f"ํŒŒ์ผ ์ €์žฅ ์™„๋ฃŒ: {file_name}")


def generate_image_from_prompt(prompt, model="gemini-2.0-flash-exp-image-generation"):
    logger.debug(f"generate_image_from_prompt ํ•จ์ˆ˜ ์‹œ์ž‘ - ํ”„๋กฌํ”„ํŠธ: '{prompt}'")
    
    try:
        # API ํ‚ค๋Š” ํ™˜๊ฒฝ๋ณ€์ˆ˜์—์„œ ๋ถˆ๋Ÿฌ์˜ด
        effective_api_key = os.environ.get("GEMINI_API_KEY")
        if effective_api_key:
            logger.debug("ํ™˜๊ฒฝ๋ณ€์ˆ˜์—์„œ API ํ‚ค ๋ถˆ๋Ÿฌ์˜ด")
        else:
            logger.error("API ํ‚ค๊ฐ€ ํ™˜๊ฒฝ๋ณ€์ˆ˜์— ์„ค์ •๋˜์ง€ ์•Š์•˜์Šต๋‹ˆ๋‹ค.")
            raise ValueError("API ํ‚ค๊ฐ€ ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค.")

        client = genai.Client(api_key=effective_api_key)
        logger.debug("Gemini ํด๋ผ์ด์–ธํŠธ ์ดˆ๊ธฐํ™” ์™„๋ฃŒ.")

        # ํ”„๋กฌํ”„ํŠธ ์ฒ˜๋ฆฌ
        if not prompt or not prompt.strip():
            prompt = "A creative and visually appealing image that captures imagination. Use vibrant colors and interesting composition."
        
        # ํ•œ๊ตญ์–ด ํ”„๋กฌํ”„ํŠธ์— ์˜์–ด ์„ค๋ช… ์ถ”๊ฐ€
        if not any(ord(c) < 128 for c in prompt):
            prompt += " Create a highly detailed, visually stunning image that captures the essence of the description."

        # ์ปจํ…์ธ  ๋ฆฌ์ŠคํŠธ ์ƒ์„ฑ
        parts = [
            types.Part.from_text(text=prompt)
        ]
        
        logger.debug(f"์ปจํ…์ธ  ๊ฐ์ฒด ์ƒ์„ฑ ์™„๋ฃŒ: {len(parts)} ์•„์ดํ…œ")

        # ์ƒ์„ฑ ์„ค์ •
        generate_content_config = types.GenerateContentConfig(
            temperature=1,
            top_p=0.95,
            top_k=40,
            max_output_tokens=8192,
            response_modalities=["image", "text"],
        )
        logger.debug(f"์ƒ์„ฑ ์„ค์ •: {generate_content_config}")

        with tempfile.NamedTemporaryFile(suffix=".png", delete=False) as tmp:
            temp_path = tmp.name
            logger.debug(f"์ž„์‹œ ํŒŒ์ผ ์ƒ์„ฑ๋จ: {temp_path}")

            # ์ŠคํŠธ๋ฆฌ๋ฐ ๋ฐฉ์‹์œผ๋กœ ๋ฐ์ดํ„ฐ ์ˆ˜์‹ 
            response_stream = client.models.generate_content_stream(
                model=model,
                contents=[
                    types.Content(
                        role="user",
                        parts=parts,
                    ),
                ],
                config=generate_content_config,
            )
            
            logger.debug("์‘๋‹ต ์ŠคํŠธ๋ฆผ ์ฒ˜๋ฆฌ ์‹œ์ž‘...")
            
            # ์‘๋‹ต์—์„œ ์ด๋ฏธ์ง€์™€ ํ…์ŠคํŠธ ์ถ”์ถœ
            image_saved = False
            response_text = ""
            
            for chunk in response_stream:
                logger.debug(f"chunk ์ˆ˜์‹ : {chunk}")
                
                # ์‘๋‹ต ๊ฒ€์ฆ
                if not hasattr(chunk, 'candidates') or not chunk.candidates or len(chunk.candidates) == 0:
                    logger.warning("chunk์— candidates๊ฐ€ ์—†์Šต๋‹ˆ๋‹ค. ๊ฑด๋„ˆ๋œ๋‹ˆ๋‹ค.")
                    continue
                    
                if not hasattr(chunk.candidates[0], 'content') or chunk.candidates[0].content is None:
                    logger.warning("chunk.candidates[0]์— content๊ฐ€ ์—†์Šต๋‹ˆ๋‹ค. ๊ฑด๋„ˆ๋œ๋‹ˆ๋‹ค.")
                    continue
                    
                if not hasattr(chunk.candidates[0].content, 'parts') or not chunk.candidates[0].content.parts:
                    logger.warning("chunk.candidates[0].content์— parts๊ฐ€ ์—†์Šต๋‹ˆ๋‹ค. ๊ฑด๋„ˆ๋œ๋‹ˆ๋‹ค.")
                    continue
                
                for part in chunk.candidates[0].content.parts:
                    if hasattr(part, 'text') and part.text:
                        response_text += part.text
                        logger.info(f"์ˆ˜์‹ ๋œ ํ…์ŠคํŠธ: {part.text}")
                    elif hasattr(part, 'inline_data') and part.inline_data:
                        save_binary_file(temp_path, part.inline_data.data)
                        logger.info(f"MIME ํƒ€์ž… {part.inline_data.mime_type}์˜ ํŒŒ์ผ์ด ์ €์žฅ๋จ: {temp_path}")
                        image_saved = True

            if not image_saved:
                logger.warning("์ด๋ฏธ์ง€๊ฐ€ ์ƒ์„ฑ๋˜์ง€ ์•Š์•˜์Šต๋‹ˆ๋‹ค.")
                return None, response_text or "์ด๋ฏธ์ง€๊ฐ€ ์ƒ์„ฑ๋˜์ง€ ์•Š์•˜์Šต๋‹ˆ๋‹ค. ๋‹ค๋ฅธ ํ”„๋กฌํ”„ํŠธ๋กœ ์‹œ๋„ํ•ด๋ณด์„ธ์š”."

        logger.debug("์ด๋ฏธ์ง€ ์ƒ์„ฑ ์™„๋ฃŒ.")
        return temp_path, response_text

    except Exception as e:
        logger.exception("์ด๋ฏธ์ง€ ์ƒ์„ฑ ์ค‘ ์˜ค๋ฅ˜ ๋ฐœ์ƒ:")
        return None, f"์˜ค๋ฅ˜ ๋ฐœ์ƒ: {str(e)}"  # ์˜ค๋ฅ˜ ๋ฐœ์ƒ ์‹œ None๊ณผ ์˜ค๋ฅ˜ ๋ฉ”์‹œ์ง€ ๋ฐ˜ํ™˜


def process_image_generation(person_pil, product_pil, background_pil, prompt):
    logger.debug(f"process_image_generation ํ•จ์ˆ˜ ์‹œ์ž‘ - ํ”„๋กฌํ”„ํŠธ: '{prompt}'")
    try:
        # ์ด๋ฏธ์ง€๋“ค์ด ์ œ๊ณต๋˜์—ˆ๋‹ค๋ฉด ๊ธฐ์กด ๋ฐฉ์‹์œผ๋กœ ์ฒ˜๋ฆฌ
        if person_pil is not None or product_pil is not None or background_pil is not None:
            return process_images_and_prompt(person_pil, product_pil, background_pil, prompt)
        
        # ์ด๋ฏธ์ง€ ์—†์ด ํ”„๋กฌํ”„ํŠธ๋งŒ ์žˆ๋Š” ๊ฒฝ์šฐ
        result_path, response_text = generate_image_from_prompt(prompt)

        # ์ด๋ฏธ์ง€ ๋ฐ˜ํ™˜ ๋ฐ ์ฒ˜๋ฆฌ
        if result_path:
            logger.debug(f"์ด๋ฏธ์ง€ ์ƒ์„ฑ ์™„๋ฃŒ. ๊ฒฝ๋กœ: {result_path}")
            try:
                result_img = Image.open(result_path)
                if result_img.mode == "RGBA":
                    result_img = result_img.convert("RGB")
                
                return [result_img], response_text or "์ด๋ฏธ์ง€๊ฐ€ ์„ฑ๊ณต์ ์œผ๋กœ ์ƒ์„ฑ๋˜์—ˆ์Šต๋‹ˆ๋‹ค."
            except Exception as e:
                logger.exception(f"๊ฒฐ๊ณผ ์ด๋ฏธ์ง€ ๋กœ๋“œ ์ค‘ ์˜ค๋ฅ˜: {str(e)}")
                return [], f"๊ฒฐ๊ณผ ์ด๋ฏธ์ง€ ์ฒ˜๋ฆฌ ์ค‘ ์˜ค๋ฅ˜: {str(e)}"
        else:
            logger.error("generate_image_from_prompt ํ•จ์ˆ˜์—์„œ None ๋ฐ˜ํ™˜๋จ.")
            return [], response_text or "์ด๋ฏธ์ง€ ์ƒ์„ฑ์— ์‹คํŒจํ–ˆ์Šต๋‹ˆ๋‹ค. ๋‹ค๋ฅธ ํ”„๋กฌํ”„ํŠธ๋กœ ์‹œ๋„ํ•ด๋ณด์„ธ์š”."

    except Exception as e:
        logger.exception("process_image_generation ํ•จ์ˆ˜์—์„œ ์˜ค๋ฅ˜ ๋ฐœ์ƒ:")
        return [], f"์˜ค๋ฅ˜ ๋ฐœ์ƒ: {str(e)}"  # ์˜ค๋ฅ˜ ์‹œ ๋นˆ ๋ฆฌ์ŠคํŠธ์™€ ์˜ค๋ฅ˜ ๋ฉ”์‹œ์ง€ ๋ฐ˜ํ™˜


# --- Gradio ์ธํ„ฐํŽ˜์ด์Šค ๊ตฌ์„ฑ (๊ธฐ์กด ์ฝ”๋“œ๋Š” ๋™์ผํ•˜๊ฒŒ ์œ ์ง€) ---
with gr.Blocks() as demo:
    gr.HTML(
        """
        <div style='display: flex; align-items: center; justify-content: center; gap: 20px'>
            <div style="background-color: var(--block-background-fill); border-radius: 8px">
                <img src="https://www.gstatic.com/lamda/images/gemini_favicon_f069958c85030456e93de685481c559f160ea06b.png" style="width: 100px; height: 100px;">
            </div>
            <div>
                <h1>Gemini๋ฅผ ์ด์šฉํ•œ ์ด๋ฏธ์ง€ ์ƒ์„ฑ</h1>
                <p>์‚ฌ๋žŒ, ์ƒํ’ˆ, ๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€๋ฅผ ํ•ฉ์„ฑํ•˜๊ฑฐ๋‚˜ ํ…์ŠคํŠธ๋กœ ์ด๋ฏธ์ง€๋ฅผ ์ƒ์„ฑํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.</p>
            </div>
        </div>
        """
    )
    gr.Markdown("์‚ฌ๋žŒ ์ด๋ฏธ์ง€, ์ƒํ’ˆ ์ด๋ฏธ์ง€, ๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€๋ฅผ ์—…๋กœ๋“œํ•˜๊ฑฐ๋‚˜ ํ…์ŠคํŠธ๋กœ ์ด๋ฏธ์ง€๋ฅผ ์ƒ์„ฑํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.")

    with gr.Row():
        with gr.Column():
            # ์ด๋ฏธ์ง€ ์ž…๋ ฅ ์„น์…˜ (์„ ํƒ ์‚ฌํ•ญ)
            person_input = gr.Image(type="pil", label="์‚ฌ๋žŒ ์ด๋ฏธ์ง€ (์„ ํƒ ์‚ฌํ•ญ)", image_mode="RGB")
            product_input = gr.Image(type="pil", label="์ƒํ’ˆ ์ด๋ฏธ์ง€ (์„ ํƒ ์‚ฌํ•ญ)", image_mode="RGB")
            background_input = gr.Image(type="pil", label="๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€ (์„ ํƒ ์‚ฌํ•ญ)", image_mode="RGB")
            
            # ํ”„๋กฌํ”„ํŠธ ์ž…๋ ฅ (ํ•„์ˆ˜)
            prompt_input = gr.Textbox(
                lines=3,
                placeholder="์ด๋ฏธ์ง€ ์ƒ์„ฑ ์„ค๋ช…์„ ์ž…๋ ฅํ•ด์ฃผ์„ธ์š”. ์˜ˆ: '๊ฝƒ๋ฐญ์—์„œ ํ–‡๋น›์„ ๋ฐ›์œผ๋ฉฐ ๋ฏธ์†Œ ์ง“๋Š” ์ Š์€ ์—ฌ์„ฑ', 'ํ˜„๋Œ€์ ์ธ ๊ฑฐ์‹ค์—์„œ ๊ณ ๊ธ‰ ์Šค๋งˆํŠธํฐ์„ ์‚ฌ์šฉํ•˜๋Š” ๋น„์ฆˆ๋‹ˆ์Šค๋งจ'",
                label="์ด๋ฏธ์ง€ ์ƒ์„ฑ ์„ค๋ช… (ํ•„์ˆ˜)"
            )
            submit_btn = gr.Button("์ด๋ฏธ์ง€ ์ƒ์„ฑ")
        
        with gr.Column():
            output_gallery = gr.Gallery(label="์ƒ์„ฑ๋œ ์ด๋ฏธ์ง€")
            output_text = gr.Textbox(label="AI ์‘๋‹ต ํ…์ŠคํŠธ", visible=True)

    submit_btn.click(
        fn=process_image_generation,
        inputs=[person_input, product_input, background_input, prompt_input],
        outputs=[output_gallery, output_text],
    )

    gr.HTML("""
    <div style="margin-top: 20px; padding: 10px; background-color: #f8f9fa; border-radius: 8px;">
        <h3>์‚ฌ์šฉ ๋ฐฉ๋ฒ•:</h3>
        <ul>
            <li><strong>ํ…์ŠคํŠธ๋กœ ์ด๋ฏธ์ง€ ์ƒ์„ฑ:</strong> ์„ค๋ช…๋งŒ ์ž…๋ ฅํ•˜๊ณ  ์ด๋ฏธ์ง€ ์ƒ์„ฑ ๋ฒ„ํŠผ์„ ๋ˆ„๋ฅด์„ธ์š”.</li>
            <li><strong>์ด๋ฏธ์ง€ ํ•ฉ์„ฑ:</strong> ์‚ฌ๋žŒ, ์ƒํ’ˆ, ๋ฐฐ๊ฒฝ ์ด๋ฏธ์ง€๋ฅผ ์„ ํƒ์ ์œผ๋กœ ์—…๋กœ๋“œํ•˜๊ณ  ํ•ฉ์„ฑ ๋ฐฉ๋ฒ•์„ ์„ค๋ช…ํ•ด์ฃผ์„ธ์š”.</li>
            <li><strong>ํ”„๋กฌํ”„ํŠธ ํŒ:</strong> ๊ตฌ์ฒด์ ์ด๊ณ  ์ƒ์ƒํ•œ ์„ค๋ช…์ผ์ˆ˜๋ก ๋” ์ข‹์€ ์ด๋ฏธ์ง€๊ฐ€ ์ƒ์„ฑ๋ฉ๋‹ˆ๋‹ค.</li>
            <li><strong>์˜ˆ์‹œ ํ”„๋กฌํ”„ํŠธ:</strong>
                <ul>
                    <li>ํ•œ์ ํ•œ ์นดํŽ˜์—์„œ ๋…ธํŠธ๋ถ์œผ๋กœ ์ž‘์—…ํ•˜๋Š” ํฌ๋ฆฌ์—์ดํ„ฐ</li>
                    <li>ํ•ด๋ณ€๊ฐ€์—์„œ ๊ณ ๊ธ‰ ์„ ๊ธ€๋ผ์Šค๋ฅผ ๋ผ๊ณ  ํฌ์ฆˆ ์ทจํ•˜๋Š” ๋ชจ๋ธ</li>
                    <li>ํ˜„๋Œ€์ ์ธ ์ฃผ๋ฐฉ์—์„œ ์ตœ์‹  ๋ธ”๋ Œ๋”๋กœ ์Šค๋ฌด๋””๋ฅผ ๋งŒ๋“œ๋Š” ์š”๋ฆฌ์‚ฌ</li>
                </ul>
            </li>
            <li><strong>์–ธ์–ด ํŒ:</strong> ํ•œ๊ตญ์–ด์™€ ์˜์–ด๋ฅผ ํ˜ผํ•ฉํ•ด ์‚ฌ์šฉํ•˜๋ฉด ๋” ์ •ํ™•ํ•œ ๊ฒฐ๊ณผ๋ฅผ ์–ป์„ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.</li>
        </ul>
    </div>
    """)

# --- ์‹คํ–‰ ---
if __name__ == "__main__":
    demo.launch(share=True)