import gradio as gr
import numpy as np
import random
import spaces
import torch
from diffusers import  DiffusionPipeline, FlowMatchEulerDiscreteScheduler, AutoencoderTiny, AutoencoderKL
from transformers import CLIPTextModel, CLIPTokenizer,T5EncoderModel, T5TokenizerFast
from live_preview_helpers import calculate_shift, retrieve_timesteps, flux_pipe_call_that_returns_an_iterable_of_images

from llm_wrapper import run_gemini
from huggingface_hub import hf_hub_download
from safetensors.torch import load_file
import subprocess


subprocess.run("rm -rf /data-nvme/zerogpu-offload/*", env={}, shell=True)


dtype = torch.bfloat16
device = "cuda" if torch.cuda.is_available() else "cpu"

taef1 = AutoencoderTiny.from_pretrained("madebyollin/taef1", torch_dtype=dtype).to(device)
good_vae = AutoencoderKL.from_pretrained("black-forest-labs/FLUX.1-dev", subfolder="vae", torch_dtype=dtype).to(device)
pipe = DiffusionPipeline.from_pretrained("black-forest-labs/FLUX.1-dev", torch_dtype=dtype, vae=taef1).to(device)

# PONIX mode load
pipe.load_lora_weights('cwhuh/ponix-generator-v0.2.0', weight_name='pytorch_lora_weights.safetensors')
embedding_path = hf_hub_download(repo_id='cwhuh/ponix-generator-v0.2.0', filename='./ponix-generator-v0.2.0_emb.safetensors', repo_type="model")
state_dict = load_file(embedding_path)
pipe.load_textual_inversion(state_dict["clip_l"], token=["<s0>", "<s1>", "<s2>"], text_encoder=pipe.text_encoder, tokenizer=pipe.tokenizer)

torch.cuda.empty_cache()

MAX_SEED = np.iinfo(np.int32).max
MAX_IMAGE_SIZE = 2048

pipe.flux_pipe_call_that_returns_an_iterable_of_images = flux_pipe_call_that_returns_an_iterable_of_images.__get__(pipe)

@spaces.GPU(duration=50)
def infer(prompt, seed=42, randomize_seed=False, width=1024, height=1024, guidance_scale=3.5, num_inference_steps=28, progress=gr.Progress(track_tqdm=True)):
    if randomize_seed:
        seed = random.randint(0, MAX_SEED)
    generator = torch.Generator().manual_seed(seed)

    print(f"User Prompt: {prompt}")

    refined_prompt = run_gemini(
        target_prompt=prompt,
        prompt_in_path="prompt.json",
    )
    print(f"Refined Prompt: {refined_prompt}")
    
    for img in pipe.flux_pipe_call_that_returns_an_iterable_of_images(
            prompt=refined_prompt,
            guidance_scale=guidance_scale,
            num_inference_steps=num_inference_steps,
            width=width,
            height=height,
            generator=generator,
            output_type="pil",
            good_vae=good_vae,
        ):
            yield img, seed
    
examples = [
    "기계공학과(로켓) 포닉스",
    "바이올린을 연주하는 포닉스",
    "물리학을 연구하는 포닉스",
    "컴퓨터공학과 포닉스"
]

css="""
#col-container {
    margin: 0 auto;
    max-width: 580px;
}

.footer {
    text-align: center;
    margin-top: 20px;
    font-size: 0.8em;
    color: #666;
}

/* URL 링크 스타일 */
a {
    color: #666 !important;
    text-decoration: underline;
}

a:hover {
    color: rgb(200, 1, 80) !important;
}


/* 기본 테마 색상을 포스텍 레드로 변경 */
:root {
    --primary-50: rgb(255, 240, 244);
    --primary-100: rgb(255, 200, 220);
    --primary-200: rgb(255, 150, 180);
    --primary-300: rgb(255, 100, 140);
    --primary-400: rgb(255, 50, 100);
    --primary-500: rgb(200, 1, 80);
    --primary-600: rgb(180, 1, 70);
    --primary-700: rgb(160, 1, 60);
    --primary-800: rgb(140, 1, 50);
    --primary-900: rgb(120, 1, 40);
    --primary-950: rgb(100, 1, 30);
}
"""

with gr.Blocks(css=css, theme="soft") as demo:
    
    with gr.Column(elem_id="col-container"):
        gr.Markdown(f"""# 🐔 [POSTECH] PONIX Generator
**[[Github](https://github.com/posplexity/ponix-generator)]**   **[[피드백](https://docs.google.com/forms/d/1BccziUtYGF0ToTjZ8PmxZExJJgzpErCuWmrm6ui0COc/edit)]**   
[based on FLUX.1-dev](https://huggingface.co/black-forest-labs/FLUX.1-dev/blob/main/LICENSE.md)
        """)
        
        with gr.Group():
            gr.Markdown("""
### 🔍 사용 가이드
- 생성하고 싶은 이미지를 한글로 간단하게 작성해주세요.
- 이미지는 노이즈에서 점차적으로 생성됩니다. (40~50초 소요)
- 문의는 이메일로 부탁드립니다: cw.huh@postech.ac.kr
            """)
        
        with gr.Group():
            prompt = gr.Text(
                label="프롬프트 입력",
                max_lines=1,
                placeholder="원하는 포닉스 이미지를 한글로 설명해주세요",
                container=True,
            )
            
            run_button = gr.Button("🚀 생성하기", variant="primary")
        
        result = gr.Image(label="생성된 이미지")
        
        with gr.Accordion("🛠️ 고급 설정", open=False):
            with gr.Group():
                use_prompt_refinement = gr.Checkbox(
                    label="프롬프트 자동 개선", 
                    value=True,
                    info="AI가 입력한 프롬프트를 자동으로 개선합니다."
                )
                
                with gr.Row():
                    seed = gr.Slider(
                        label="시드 값",
                        minimum=0,
                        maximum=MAX_SEED,
                        step=1,
                        value=0,
                    )
                    
                    randomize_seed = gr.Checkbox(label="랜덤 시드 사용", value=True)
                
                with gr.Row():
                    width = gr.Slider(
                        label="너비",
                        minimum=256,
                        maximum=MAX_IMAGE_SIZE,
                        step=32,
                        value=1024,
                    )
                    
                    height = gr.Slider(
                        label="높이",
                        minimum=256,
                        maximum=MAX_IMAGE_SIZE,
                        step=32,
                        value=1024,
                    )
                
                with gr.Row():
                    guidance_scale = gr.Slider(
                        label="가이던스 스케일",
                        minimum=1,
                        maximum=15,
                        step=0.1,
                        value=3.5,
                    )
      
                    num_inference_steps = gr.Slider(
                        label="추론 단계 수",
                        minimum=1,
                        maximum=50,
                        step=1,
                        value=28,
                    )
        
        gr.Markdown("### 예시 프롬프트")
        gr.Examples(
            examples = examples,
            fn = infer,
            inputs = [prompt],
            outputs = [result, seed],
            cache_examples="lazy"
        )
        
        gr.HTML("""
        <div class="footer">
            PONIX Generator by 허채원 | POSTECH
        </div>
        """)

    gr.on(
        triggers=[run_button.click, prompt.submit],
        fn = infer,
        inputs = [prompt, seed, randomize_seed, width, height, guidance_scale, num_inference_steps],
        outputs = [result, seed]
    )

demo.launch()