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import gradio as gr
import spaces
import torch
from diffusers import FluxKontextPipeline
from diffusers.utils import load_image
from PIL import Image
import os

# ----------------------------------------------
# Style โ†’ LoRA file mapping
# ----------------------------------------------
STYLE_LORA_MAP = {
    "3D_Chibi": "3D_Chibi_lora_weights.safetensors",
    "American_Cartoon": "American_Cartoon_lora_weights.safetensors",
    "Chinese_Ink": "Chinese_Ink_lora_weights.safetensors",
    "Clay_Toy": "Clay_Toy_lora_weights.safetensors",
    "Fabric": "Fabric_lora_weights.safetensors",
    "Ghibli": "Ghibli_lora_weights.safetensors",
    "Irasutoya": "Irasutoya_lora_weights.safetensors",
    "Jojo": "Jojo_lora_weights.safetensors",
    "Oil_Painting": "Oil_Painting_lora_weights.safetensors",
    "Pixel": "Pixel_lora_weights.safetensors",
    "Snoopy": "Snoopy_lora_weights.safetensors",
    "Poly": "Poly_lora_weights.safetensors",
    "LEGO": "LEGO_lora_weights.safetensors",
    "Origami": "Origami_lora_weights.safetensors",
    "Pop_Art": "Pop_Art_lora_weights.safetensors",
    "Van_Gogh": "Van_Gogh_lora_weights.safetensors",
    "Paper_Cutting": "Paper_Cutting_lora_weights.safetensors",
    "Line": "Line_lora_weights.safetensors",
    "Vector": "Vector_lora_weights.safetensors",
    "Picasso": "Picasso_lora_weights.safetensors",
    "Macaron": "Macaron_lora_weights.safetensors",
    "Rick_Morty": "Rick_Morty_lora_weights.safetensors"
}

# ----------------------------------------------
# Style descriptions (ํˆดํŒ์šฉ)
# ----------------------------------------------
STYLE_DESCRIPTIONS = {
    "3D_Chibi": "๊ท€์—ฌ์šด SD ์บ๋ฆญํ„ฐ์˜ 3D ๋А๋‚Œ",
    "American_Cartoon": "๊ณ ์ „์ ์ธ ๋ฏธ๊ตญ ์นดํˆฐ ์Šคํƒ€์ผ",
    "Chinese_Ink": "์ˆ˜๋ฌตํ™”์˜ ๋ฒˆ์ง๊ณผ ๋†๋‹ด ํ‘œํ˜„",
    "Clay_Toy": "์ฐฐํ™ยทํ”Œ๋ผ์Šคํ‹ด ์žฅ๋‚œ๊ฐ่ณช",
    "Fabric": "์„ฌ์œ ยทํŒจ๋ธŒ๋ฆญ ์งˆ๊ฐ",
    "Ghibli": "์ง€๋ธŒ๋ฆฌํ’ ๋”ฐ๋œปํ•œ ์ƒ‰๊ฐ & ์—ฐํ•„์„ ",
    "Irasutoya": "์ผ๋Ÿฌ์Šคํ† ์•ผ ๋ฏธ๋‹ˆ๋ฉ€ ํ‰๋ฉด ๊ทธ๋ฆผ",
    "Jojo": "์ฃ ์ฃ ์˜ ๊ธฐ๋ฌ˜ํ•œ ๋ชจํ—˜ ๋ง๊ฐ€ ํ„ฐ์น˜",
    "Oil_Painting": "์œ ํ™” ๋ถ“ํ„ฐ์น˜์™€ ์งˆ๊ฐ",
    "Pixel": "16/32โ€‘bit ๋ ˆํŠธ๋กœ ํ”ฝ์…€์•„ํŠธ",
    "Snoopy": "ํ”ผ๋„ˆ์ธ  ์ŠคํŠธ๋ฆฝ(์Šค๋ˆ„ํ”ผ) ์Šคํƒ€์ผ",
    "Poly": "๋กœ์šฐํด๋ฆฌ 3D ๊ธฐํ•˜ํ•™์  ์Šคํƒ€์ผ",
    "LEGO": "๋ ˆ๊ณ  ๋ธ”๋ก ์กฐ๋ฆฝ ์Šคํƒ€์ผ",
    "Origami": "์ข…์ด์ ‘๊ธฐ ์งˆ๊ฐยท๊ฐ๋„",
    "Pop_Art": "ํŒ์•„ํŠธ์˜ ์„ ๋ช…ํ•œ ์ƒ‰๊ฐ๊ณผ ๋„ํŠธ",
    "Van_Gogh": "๋ฐ˜ ๊ณ ํ์˜ ๊ตต์€ ์ž„ํŒŒ์Šคํ† ",
    "Paper_Cutting": "์ข…์ด ์˜ค๋ฆฌ๊ธฐ ์‹ค๋ฃจ์—ฃ",
    "Line": "๊น”๋”ํ•œ ๋ผ์ธ ๋“œ๋กœ์ž‰",
    "Vector": "๋ฒกํ„ฐ ๊ทธ๋ž˜ํ”ฝยทํ”Œ๋žซ ๋””์ž์ธ",
    "Picasso": "ํ”ผ์นด์†Œ์‹ ์ž…์ฒด์ฃผ์˜ ํ๋น„์ฆ˜",
    "Macaron": "ํŒŒ์Šคํ…” ๋งˆ์นด๋กฑํ†ค ๋ถ€๋“œ๋Ÿฌ์›€",
    "Rick_Morty": "๋ฆญ ์•ค ๋ชจํ‹ฐ ์• ๋‹ˆ๋ฉ”์ด์…˜ ์Šคํƒ€์ผ"
}

# ์ „์—ญ ํŒŒ์ดํ”„๋ผ์ธ
pipe = None


def get_dtype():
    """์ตœ์  dtype(bf16 ์ง€์› ์‹œ bf16, ์•„๋‹ˆ๋ฉด fp16) ์„ ํƒ"""
    if torch.cuda.is_available():
        major, _ = torch.cuda.get_device_capability()
        if major >= 8:  # Ada/Hopper GPU๋Š” bf16 ๋ณธ๊ฒฉ ์ง€์›
            return torch.bfloat16
    return torch.float16


def load_pipeline():
    """FluxKontext ํŒŒ์ดํ”„๋ผ์ธ์„ (์ง€์—ฐ)๋กœ๋“œ"""
    global pipe
    if pipe is None:
        gr.Info("โฌ‡๏ธ FLUX.1โ€‘Kontext ๋ชจ๋ธ์„ ๋‹ค์šด๋กœ๋“œํ•ฉ๋‹ˆ๋‹คโ€ฆ")

        pipe = FluxKontextPipeline.from_pretrained(
            "black-forest-labs/FLUX.1-Kontext-dev",
            torch_dtype=get_dtype(),
            resume_download=True,
        )

        device = "cuda" if torch.cuda.is_available() else "cpu"
        pipe.to(device)

        # VRAM ์ ˆ์•ฝ ๋ชจ๋“œ
        if torch.cuda.is_available():
            pipe.enable_sequential_cpu_offload()
        pipe.vae.enable_tiling()

    return pipe


@spaces.GPU(duration=600)  # ์ดˆ๊ธฐ ๋‹ค์šด๋กœ๋“œ ์‹œ๊ฐ„ ํ™•๋ณด
def style_transfer(
    input_image,
    style_name,
    prompt_suffix,
    num_inference_steps,
    guidance_scale,
    seed,
):
    """์„ ํƒํ•œ ์Šคํƒ€์ผ๋กœ ์ด๋ฏธ์ง€ ๋ณ€ํ™˜"""

    if input_image is None:
        gr.Warning("๐Ÿ–ผ๏ธ ๋จผ์ € ์ด๋ฏธ์ง€๋ฅผ ์—…๋กœ๋“œํ•˜์„ธ์š”!")
        return None

    try:
        pipe = load_pipeline()

        # ์‹œ๋“œ ๊ณ ์ • (0์ด๋ฉด ๋‚œ์ˆ˜)
        generator = None
        if seed and int(seed) != 0:
            generator = torch.Generator(device=pipe.device).manual_seed(int(seed))

        # ์ด๋ฏธ์ง€ ๋กœ๋“œ & ๋ฆฌ์‚ฌ์ด์ฆˆ
        img = load_image(input_image) if isinstance(input_image, str) else input_image
        img = img.convert("RGB").resize((1024, 1024), Image.Resampling.LANCZOS)

        # LoRA ๋กœ๋”ฉ
        lora_file = STYLE_LORA_MAP[style_name]
        adapter_name = "style"
        pipe.load_lora_weights(
            "Owen777/Kontext-Style-Loras",
            weight_name=lora_file,
            adapter_name=adapter_name,
        )
        pipe.set_adapters([adapter_name], adapter_weights=[1.0])

        # ํ”„๋กฌํ”„ํŠธ ๊ตฌ์„ฑ
        prompt = f"Turn this image into the {style_name.replace('_', ' ')} style."
        if prompt_suffix and prompt_suffix.strip():
            prompt += f" {prompt_suffix.strip()}"

        gr.Info("๐ŸŽจ ์ด๋ฏธ์ง€๋ฅผ ์ƒ์„ฑ ์ค‘โ€ฆ")

        result = pipe(
            image=img,
            prompt=prompt,
            guidance_scale=float(guidance_scale),
            num_inference_steps=int(num_inference_steps),
            generator=generator,
            height=1024,
            width=1024,
        )

        # LoRA ์–ธ๋กœ๋“œ ๋ฐ ์บ์‹œ ์ •๋ฆฌ
        pipe.unload_lora_weights()
        torch.cuda.empty_cache()

        return result.images[0]

    except Exception as e:
        gr.Error(f"๐Ÿšจ ์˜ค๋ฅ˜: {e}")
        torch.cuda.empty_cache()
        return None


def update_description(style):
    return STYLE_DESCRIPTIONS.get(style, "")


with gr.Blocks(title="FLUX.1 Kontext Style Transfer", theme=gr.themes.Soft()) as demo:
    gr.Markdown(
        """
        # ๐ŸŽจ FLUX.1 Kontext Style Transfer
        FLUX.1โ€‘Kontextโ€‘dev ๋ชจ๋ธ๊ณผ 22๊ฐœ์˜ ๊ณ ํ’ˆ์งˆ LoRA๋กœ ์ด๋ฏธ์ง€๋ฅผ ๋‹ค์–‘ํ•œ ์˜ˆ์ˆ  ์Šคํƒ€์ผ๋กœ ๋ณ€ํ™˜ํ•˜์„ธ์š”.
        """
    )

    with gr.Row():
        with gr.Column(scale=1):
            input_image = gr.Image(label="Upload Image", type="pil", height=400)

            style_dropdown = gr.Dropdown(
                choices=list(STYLE_LORA_MAP.keys()),
                value="Ghibli",
                label="Select Style",
                info="Choose from 22 different artistic styles",
            )

            style_info = gr.Textbox(
                label="Style Description",
                value=STYLE_DESCRIPTIONS["Ghibli"],
                interactive=False,
                lines=2,
            )

            prompt_suffix = gr.Textbox(
                label="Additional Instructions (Optional)",
                placeholder="์˜ˆ: 'make it more colorful', 'add dramatic lighting' โ€ฆ",
                lines=2,
            )

            with gr.Accordion("Advanced Settings", open=False):
                num_steps = gr.Slider(
                    10,
                    50,
                    value=24,
                    step=1,
                    label="Inference Steps",
                    info="๋” ๋†’์„์ˆ˜๋ก ํ’ˆ์งˆโ†‘ ์†๋„โ†“",
                )
                guidance = gr.Slider(
                    1.0,
                    7.5,
                    value=2.5,
                    step=0.1,
                    label="Guidance Scale",
                    info="ํ”„๋กฌํ”„ํŠธ ์ค€์ˆ˜ ์ •๋„",
                )
                seed = gr.Number(label="Seed (0 = Random)", value=0)

            generate_btn = gr.Button(
                "๐ŸŽจ Transform Image", variant="primary", size="lg"
            )

        with gr.Column(scale=1):
            output_image = gr.Image(label="Styled Result", type="pil", height=400)

            gr.Markdown(
                """### ๐Ÿ’ก Tips:
                - ๋ชจ๋“  ์ด๋ฏธ์ง€๋Š” 1024ร—1024๋กœ ๋ฆฌ์‚ฌ์ด์ฆˆ๋ฉ๋‹ˆ๋‹ค.
                - ์ฒซ ์‹คํ–‰ ์‹œ 7โ€ฏGB ๋ชจ๋ธ ๋‹ค์šด๋กœ๋“œ๊ฐ€ ํ•„์š”ํ•ฉ๋‹ˆ๋‹ค.
                - ์Šคํƒ€์ผ ๋ณ€ํ™˜์€ ์•ฝ 30โ€‘60โ€ฏ์ดˆ ์†Œ์š”๋ฉ๋‹ˆ๋‹ค.
                - ๋‹ค๋ฅธ ์Šคํƒ€์ผ๋„ ์‹œํ—˜ํ•ด ๋ณด์„ธ์š”!"""
            )

    # ์ด๋ฒคํŠธ ๋ฐ”์ธ๋”ฉ
    style_dropdown.change(update_description, [style_dropdown], [style_info])

    generate_btn.click(
        style_transfer,
        inputs=[
            input_image,
            style_dropdown,
            prompt_suffix,
            num_steps,
            guidance,
            seed,
        ],
        outputs=[output_image],
    )

    gr.Markdown(
        """
        ---
        Created with โค๏ธ by [Blackโ€‘Forest Labs](https://huggingface.co/black-forest-labs) & 
        [Owen777/Kontextโ€‘Styleโ€‘Loras](https://huggingface.co/Owen777/Kontext-Style-Loras)
        """
    )

if __name__ == "__main__":
    demo.launch()