import gradio as gr
import numpy as np
import random
import torch
from PIL import Image
import os
import sys
import importlib.util

import spaces

# 중요: 패치 적용 - huggingface_hub에 cached_download 함수 추가
import huggingface_hub
if not hasattr(huggingface_hub, "cached_download"):
    # 기존 hf_hub_download 함수를 cached_download로 별칭 추가
    huggingface_hub.cached_download = huggingface_hub.hf_hub_download
    
# 그 후 나머지 임포트 진행
from huggingface_hub import snapshot_download, hf_hub_download, model_info

from transformers import CLIPVisionModelWithProjection, CLIPImageProcessor
from kolors.pipelines.pipeline_stable_diffusion_xl_chatglm_256_ipadapter import StableDiffusionXLPipeline
from kolors.models.modeling_chatglm import ChatGLMModel
from kolors.models.tokenization_chatglm import ChatGLMTokenizer
from kolors.models.unet_2d_condition import UNet2DConditionModel
from diffusers import AutoencoderKL, EulerDiscreteScheduler


device = "cuda"
root_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
ckpt_dir = f'{root_dir}/weights/Kolors'

snapshot_download(repo_id="Kwai-Kolors/Kolors", local_dir=ckpt_dir)
snapshot_download(repo_id="Kwai-Kolors/Kolors-IP-Adapter-Plus", local_dir=f"{root_dir}/weights/Kolors-IP-Adapter-Plus")

# Load models
text_encoder = ChatGLMModel.from_pretrained(f'{ckpt_dir}/text_encoder', torch_dtype=torch.float16).half().to(device)
tokenizer = ChatGLMTokenizer.from_pretrained(f'{ckpt_dir}/text_encoder')
vae = AutoencoderKL.from_pretrained(f"{ckpt_dir}/vae", revision=None).half().to(device)
scheduler = EulerDiscreteScheduler.from_pretrained(f"{ckpt_dir}/scheduler")
unet = UNet2DConditionModel.from_pretrained(f"{ckpt_dir}/unet", revision=None).half().to(device)

image_encoder = CLIPVisionModelWithProjection.from_pretrained(
    f'{root_dir}/weights/Kolors-IP-Adapter-Plus/image_encoder',
    ignore_mismatched_sizes=True
).to(dtype=torch.float16, device=device)

ip_img_size = 336
clip_image_processor = CLIPImageProcessor(size=ip_img_size, crop_size=ip_img_size)

pipe = StableDiffusionXLPipeline(
    vae=vae,
    text_encoder=text_encoder,
    tokenizer=tokenizer,
    unet=unet,
    scheduler=scheduler,
    image_encoder=image_encoder,
    feature_extractor=clip_image_processor,
    force_zeros_for_empty_prompt=False
).to(device)

if hasattr(pipe.unet, 'encoder_hid_proj'):
    pipe.unet.text_encoder_hid_proj = pipe.unet.encoder_hid_proj

pipe.load_ip_adapter(f'{root_dir}/weights/Kolors-IP-Adapter-Plus', subfolder="", weight_name=["ip_adapter_plus_general.bin"])

MAX_SEED = np.iinfo(np.int32).max
MAX_IMAGE_SIZE = 1024

# ----------------------------------------------
# infer 함수 (기존 로직 그대로 유지)
# ----------------------------------------------
@spaces.GPU(duration=80)
def infer(
    user_prompt,
    ip_adapter_image,
    ip_adapter_scale=0.5,
    negative_prompt="",
    seed=100,
    randomize_seed=False,
    width=1024,
    height=1024,
    guidance_scale=5.0,
    num_inference_steps=50,
    progress=gr.Progress(track_tqdm=True)
):
    # 숨겨진(기본/필수) 프롬프트
    hidden_prompt = (
        "Ghibli Studio style, Charming hand-drawn anime-style illustration"
    )

    # 실제로 파이프라인에 전달할 최종 프롬프트
    prompt = f"{hidden_prompt}, {user_prompt}"

    if randomize_seed:
        seed = random.randint(0, MAX_SEED)
    
    generator = torch.Generator(device="cuda").manual_seed(seed)
    pipe.to("cuda")
    image_encoder.to("cuda")
    pipe.image_encoder = image_encoder
    pipe.set_ip_adapter_scale([ip_adapter_scale])
    
    image = pipe(
        prompt=prompt,
        ip_adapter_image=[ip_adapter_image],
        negative_prompt=negative_prompt,
        height=height,
        width=width,
        num_inference_steps=num_inference_steps,
        guidance_scale=guidance_scale,
        num_images_per_prompt=1,
        generator=generator,
    ).images[0]
    
    return image, seed

examples = [
    [
        "background alps",        
        "gh0.webp",
        0.5
    ],
    [
        "dancing",        
        "gh5.jpg",
        0.5
    ],    
    [
        "smile",
        "gh2.jpg",
        0.5
    ],
    [
        "3d style",        
        "gh3.webp",
        0.6
    ],
    [
        "with Pikachu",        
        "gh4.jpg",
        0.5
    ],
    [
        "Ghibli Studio style, Charming hand-drawn anime-style illustration",
        "gh7.jpg",
        0.5
    ],        
    [
        "Ghibli Studio style, Charming hand-drawn anime-style illustration",
        "gh1.jpg",
        0.5
    ],    
]

# --------------------------
# 개선된 UI를 위한 CSS
# --------------------------
css = """
body {
    background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
    font-family: 'Helvetica Neue', Arial, sans-serif;
    color: #333;
    margin: 0;
    padding: 0;
}

#col-container {
    margin: 0 auto !important;
    max-width: 720px;
    background: rgba(255,255,255,0.85);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

#header-title {
    text-align: center;
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

#prompt-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 1rem;
}

#prompt-text {
    flex: 1;
}

#result img {
    object-position: top;
    border-radius: 8px;
}

#result .image-container {
    height: 100%;
}

.gr-button {
    background-color: #2E8BFB !important;
    color: white !important;
    border: none !important;
    transition: background-color 0.2s ease;
}

.gr-button:hover {
    background-color: #186EDB !important;
}

.gr-slider input[type=range] {
    accent-color: #2E8BFB !important;
}

.gr-box {
    background-color: #fafafa !important;
    border: 1px solid #ddd !important;
    border-radius: 8px !important;
    padding: 1rem !important;
}

#advanced-settings {
    margin-top: 1rem;
    border-radius: 8px;
}
"""

with gr.Blocks(theme="apriel", css=css) as demo:
    with gr.Column(elem_id="col-container"):
        gr.Markdown("<div id='header-title'>Ghibli Meme Studio</div>")
        gr.Markdown("<div id='header-title' style='font-size: 12px;'>Community: https://discord.gg/openfreeai</div>")
        
        # 상단: 프롬프트 입력 + 실행 버튼
        with gr.Row(elem_id="prompt-row"):
            prompt = gr.Text(
                label="Prompt",
                show_label=False,
                max_lines=1,
                placeholder="Enter your prompt",
                elem_id="prompt-text",
            )
            run_button = gr.Button("Run", elem_id="run-button")
        
        # 가운데: 이미지 입력과 슬라이더, 결과 이미지
        with gr.Row():
            with gr.Column():
                ip_adapter_image = gr.Image(label="IP-Adapter Image", type="pil")
                ip_adapter_scale = gr.Slider(
                    label="Image influence scale",
                    info="Use 1 for creating variations",
                    minimum=0.0,
                    maximum=1.0,
                    step=0.05,
                    value=0.5,
                )
            result = gr.Image(label="Result", elem_id="result")

        # 하단: 고급 설정(Accordion)
        with gr.Accordion("Advanced Settings", open=False, elem_id="advanced-settings"):
            negative_prompt = gr.Text(
                label="Negative prompt",
                max_lines=2,
                placeholder=(
                    "Copy(worst quality, low quality:1.4), bad anatomy, bad hands, text, error, "
                    "missing fingers, extra digit, fewer digits, cropped, worst quality, low quality, "
                    "normal quality, jpeg artifacts, signature, watermark, username, blurry, "
                    "artist name, (deformed iris, deformed pupils:1.2), (semi-realistic, cgi, "
                    "3d, render:1.1), amateur, (poorly drawn hands, poorly drawn face:1.2)"
                ),
            )
            seed = gr.Slider(
                label="Seed",
                minimum=0,
                maximum=MAX_SEED,
                step=1,
                value=0,
            )
            randomize_seed = gr.Checkbox(label="Randomize seed", value=True)
            with gr.Row():
                width = gr.Slider(
                    label="Width",
                    minimum=256,
                    maximum=MAX_IMAGE_SIZE,
                    step=32,
                    value=1024,
                )
                height = gr.Slider(
                    label="Height",
                    minimum=256,
                    maximum=MAX_IMAGE_SIZE,
                    step=32,
                    value=1024,
                )
            with gr.Row():
                guidance_scale = gr.Slider(
                    label="Guidance scale",
                    minimum=0.0,
                    maximum=10.0,
                    step=0.1,
                    value=5.0,
                )
                num_inference_steps = gr.Slider(
                    label="Number of inference steps",
                    minimum=1,
                    maximum=100,
                    step=1,
                    value=50,
                )
        
        # 예시들
        gr.Examples(
            examples=examples,
            fn=infer,
            inputs=[prompt, ip_adapter_image, ip_adapter_scale],
            outputs=[result, seed],
            cache_examples="lazy"
        )

    # 버튼 클릭/프롬프트 엔터 시 실행
    gr.on(
        triggers=[run_button.click, prompt.submit],
        fn=infer,
        inputs=[
            prompt,
            ip_adapter_image,
            ip_adapter_scale,
            negative_prompt,
            seed,
            randomize_seed,
            width,
            height,
            guidance_scale,
            num_inference_steps
        ],
        outputs=[result, seed]
    )

demo.queue().launch()