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import os
from dotenv import load_dotenv
import gradio as gr
from huggingface_hub import InferenceClient
import pandas as pd
from typing import List, Tuple

# .env 파일 λ‘œλ“œ
load_dotenv()

# HuggingFace 토큰 μ„€μ •
HF_TOKEN = os.getenv("HF_TOKEN")
if not HF_TOKEN:
    raise ValueError("HF_TOKEN이 μ„€μ •λ˜μ§€ μ•Šμ•˜μŠ΅λ‹ˆλ‹€. .env νŒŒμΌμ— HF_TOKEN을 μ„€μ •ν•΄μ£Όμ„Έμš”.")

# LLM Models Definition
LLM_MODELS = {
    "Cohere c4ai-crp-08-2024": "CohereForAI/c4ai-command-r-plus-08-2024",  # Default
    "Meta Llama3.3-70B": "meta-llama/Llama-3.3-70B-Instruct"    # Backup model
}

def get_client(model_name="Cohere c4ai-crp-08-2024"):
    try:
        return InferenceClient(LLM_MODELS[model_name], token=HF_TOKEN)
    except Exception:
        # If primary model fails, try backup model
        return InferenceClient(LLM_MODELS["Meta Llama3.3-70B"], token=HF_TOKEN)

def analyze_file_content(content, file_type):
    """Analyze file content and return structural summary"""
    if file_type in ['parquet', 'csv']:
        try:
            lines = content.split('\n')
            header = lines[0]
            columns = header.count('|') - 1
            rows = len(lines) - 3
            return f"πŸ“Š 데이터셋 ꡬ쑰: {columns}개 컬럼, {rows}개 데이터"
        except:
            return "❌ 데이터셋 ꡬ쑰 뢄석 μ‹€νŒ¨"
    
    lines = content.split('\n')
    total_lines = len(lines)
    non_empty_lines = len([line for line in lines if line.strip()])
    
    if any(keyword in content.lower() for keyword in ['def ', 'class ', 'import ', 'function']):
        functions = len([line for line in lines if 'def ' in line])
        classes = len([line for line in lines if 'class ' in line])
        imports = len([line for line in lines if 'import ' in line or 'from ' in line])
        return f"πŸ’» μ½”λ“œ ꡬ쑰: {total_lines}쀄 (ν•¨μˆ˜: {functions}, 클래슀: {classes}, μž„ν¬νŠΈ: {imports})"
    
    paragraphs = content.count('\n\n') + 1
    words = len(content.split())
    return f"πŸ“ λ¬Έμ„œ ꡬ쑰: {total_lines}쀄, {paragraphs}단락, μ•½ {words}단어"

def read_uploaded_file(file):
    if file is None:
        return "", ""
    try:
        file_ext = os.path.splitext(file.name)[1].lower()
        
        if file_ext == '.parquet':
            df = pd.read_parquet(file.name, engine='pyarrow')
            content = df.head(10).to_markdown(index=False)
            return content, "parquet"
        elif file_ext == '.csv':
            encodings = ['utf-8', 'cp949', 'euc-kr', 'latin1']
            for encoding in encodings:
                try:
                    df = pd.read_csv(file.name, encoding=encoding)
                    content = f"πŸ“Š 데이터 미리보기:\n{df.head(10).to_markdown(index=False)}\n\n"
                    content += f"\nπŸ“ˆ 데이터 정보:\n"
                    content += f"- 전체 ν–‰ 수: {len(df)}\n"
                    content += f"- 전체 μ—΄ 수: {len(df.columns)}\n"
                    content += f"- 컬럼 λͺ©λ‘: {', '.join(df.columns)}\n"
                    content += f"\nπŸ“‹ 컬럼 데이터 νƒ€μž…:\n"
                    for col, dtype in df.dtypes.items():
                        content += f"- {col}: {dtype}\n"
                    null_counts = df.isnull().sum()
                    if null_counts.any():
                        content += f"\n⚠️ 결츑치:\n"
                        for col, null_count in null_counts[null_counts > 0].items():
                            content += f"- {col}: {null_count}개 λˆ„λ½\n"
                    return content, "csv"
                except UnicodeDecodeError:
                    continue
            raise UnicodeDecodeError(f"❌ μ§€μ›λ˜λŠ” μΈμ½”λ”©μœΌλ‘œ νŒŒμΌμ„ 읽을 수 μ—†μŠ΅λ‹ˆλ‹€ ({', '.join(encodings)})")
        else:
            encodings = ['utf-8', 'cp949', 'euc-kr', 'latin1']
            for encoding in encodings:
                try:
                    with open(file.name, 'r', encoding=encoding) as f:
                        content = f.read()
                    return content, "text"
                except UnicodeDecodeError:
                    continue
            raise UnicodeDecodeError(f"❌ μ§€μ›λ˜λŠ” μΈμ½”λ”©μœΌλ‘œ νŒŒμΌμ„ 읽을 수 μ—†μŠ΅λ‹ˆλ‹€ ({', '.join(encodings)})")
    except Exception as e:
        return f"❌ 파일 읽기 였λ₯˜: {str(e)}", "error"

def format_history(history):
    formatted_history = []
    for user_msg, assistant_msg in history:
        formatted_history.append({"role": "user", "content": user_msg})
        if assistant_msg:
            formatted_history.append({"role": "assistant", "content": assistant_msg})
    return formatted_history

def chat(message, history, uploaded_file, system_message="", max_tokens=4000, temperature=0.7, top_p=0.9):
    system_prefix = """μ €λŠ” μ—¬λŸ¬λΆ„μ˜ μΉœκ·Όν•˜κ³  지적인 AI μ–΄μ‹œμŠ€ν„΄νŠΈμž…λ‹ˆλ‹€. λ‹€μŒκ³Ό 같은 μ›μΉ™μœΌλ‘œ μ†Œν†΅ν•˜κ² μŠ΅λ‹ˆλ‹€:

1. 🀝 μΉœκ·Όν•˜κ³  곡감적인 νƒœλ„λ‘œ λŒ€ν™”
2. πŸ’‘ λͺ…ν™•ν•˜κ³  μ΄ν•΄ν•˜κΈ° μ‰¬μš΄ μ„€λͺ… 제곡
3. 🎯 질문의 μ˜λ„λ₯Ό μ •ν™•νžˆ νŒŒμ•…ν•˜μ—¬ λ§žμΆ€ν˜• λ‹΅λ³€
4. πŸ“š ν•„μš”ν•œ 경우 μ—…λ‘œλ“œλœ 파일 λ‚΄μš©μ„ μ°Έκ³ ν•˜μ—¬ ꡬ체적인 도움 제곡
5. ✨ 좔가적인 톡찰과 μ œμ•ˆμ„ ν†΅ν•œ κ°€μΉ˜ μžˆλŠ” λŒ€ν™”

항상 예의 λ°”λ₯΄κ³  μΉœμ ˆν•˜κ²Œ μ‘λ‹΅ν•˜λ©°, ν•„μš”ν•œ 경우 ꡬ체적인 μ˜ˆμ‹œλ‚˜ μ„€λͺ…을 μΆ”κ°€ν•˜μ—¬ 
이해λ₯Ό λ•κ² μŠ΅λ‹ˆλ‹€."""

    if uploaded_file:
        content, file_type = read_uploaded_file(uploaded_file)
        if file_type == "error":
            return "", [{"role": "user", "content": message}, {"role": "assistant", "content": content}]
        
        file_summary = analyze_file_content(content, file_type)
        
        if file_type in ['parquet', 'csv']:
            system_message += f"\n\n파일 λ‚΄μš©:\n```markdown\n{content}\n```"
        else:
            system_message += f"\n\n파일 λ‚΄μš©:\n```\n{content}\n```"
            
        if message == "파일 뢄석을 μ‹œμž‘ν•©λ‹ˆλ‹€...":
            message = f"""[파일 ꡬ쑰 뢄석] {file_summary}

λ‹€μŒ κ΄€μ μ—μ„œ 도움을 λ“œλ¦¬κ² μŠ΅λ‹ˆλ‹€:
1. πŸ“‹ μ „λ°˜μ μΈ λ‚΄μš© νŒŒμ•…
2. πŸ’‘ μ£Όμš” νŠΉμ§• μ„€λͺ…
3. 🎯 μ‹€μš©μ μΈ ν™œμš© λ°©μ•ˆ
4. ✨ κ°œμ„  μ œμ•ˆ
5. πŸ’¬ μΆ”κ°€ μ§ˆλ¬Έμ΄λ‚˜ ν•„μš”ν•œ μ„€λͺ…"""

    messages = [{"role": "system", "content": f"{system_prefix} {system_message}"}]
    
    if history is not None:
        for item in history:
            if isinstance(item, dict):
                messages.append(item)
            elif isinstance(item, (list, tuple)) and len(item) == 2:
                messages.append({"role": "user", "content": item[0]})
                if item[1]:
                    messages.append({"role": "assistant", "content": item[1]})

    messages.append({"role": "user", "content": message})

    try:
        client = get_client()
        partial_message = ""
        current_history = []
        
        for msg in client.chat_completion(
            messages,
            max_tokens=max_tokens,
            stream=True,
            temperature=temperature,
            top_p=top_p,
        ):
            token = msg.choices[0].delta.get('content', None)
            if token:
                partial_message += token
                current_history = [
                    {"role": "user", "content": message},
                    {"role": "assistant", "content": partial_message}
                ]
                yield "", current_history
                
    except Exception as e:
        error_msg = f"❌ 였λ₯˜κ°€ λ°œμƒν–ˆμŠ΅λ‹ˆλ‹€: {str(e)}"
        error_history = [
            {"role": "user", "content": message},
            {"role": "assistant", "content": error_msg}
        ]
        yield "", error_history

css = """
footer {visibility: hidden}
"""

# UI ꡬ성
with gr.Blocks(theme="Yntec/HaleyCH_Theme_Orange", css=css, title="GiniGEN πŸ€–") as demo:
    gr.HTML(
        """
        <div style="text-align: center; max-width: 800px; margin: 0 auto;">
            <h1 style="font-size: 3em; font-weight: 600; margin: 0.5em;">AI μ–΄μ‹œμŠ€ν„΄νŠΈ πŸ€–</h1>
            <h3 style="font-size: 1.2em; margin: 1em;">λ‹Ήμ‹ μ˜ λ“ λ“ ν•œ λŒ€ν™” νŒŒνŠΈλ„ˆ πŸ’¬</h3>
        </div>
        """
    )

    with gr.Row():
        with gr.Column(scale=2):
            chatbot = gr.Chatbot(
                height=600, 
                label="λŒ€ν™”μ°½ πŸ’¬",
                show_label=True,
                type="messages"
            )
            msg = gr.Textbox(
                label="λ©”μ‹œμ§€ μž…λ ₯",
                show_label=False,
                placeholder="무엇이든 λ¬Όμ–΄λ³΄μ„Έμš”... πŸ’­",
                container=False
            )
            with gr.Row():
                clear = gr.ClearButton([msg, chatbot], value="λŒ€ν™”λ‚΄μš© μ§€μš°κΈ°")
                send = gr.Button("보내기 πŸ“€")
        
        with gr.Column(scale=1):
            gr.Markdown("### 파일 μ—…λ‘œλ“œ πŸ“\n지원 ν˜•μ‹: ν…μŠ€νŠΈ, μ½”λ“œ, CSV, Parquet 파일")
            file_upload = gr.File(
                label="파일 선택",
                file_types=["text", ".csv", ".parquet"],
                type="filepath"
            )
            
            with gr.Accordion("κ³ κΈ‰ μ„€μ • βš™οΈ", open=False):
                system_message = gr.Textbox(label="μ‹œμŠ€ν…œ λ©”μ‹œμ§€ πŸ“", value="")
                max_tokens = gr.Slider(minimum=1, maximum=8000, value=4000, label="μ΅œλŒ€ 토큰 수 πŸ“Š")
                temperature = gr.Slider(minimum=0, maximum=1, value=0.7, label="μ°½μ˜μ„± μˆ˜μ€€ 🌑️")
                top_p = gr.Slider(minimum=0, maximum=1, value=0.9, label="응닡 λ‹€μ–‘μ„± πŸ“ˆ")

    # μ˜ˆμ‹œ 질문
    gr.Examples(
        examples=[
            ["μ•ˆλ…•ν•˜μ„Έμš”! μ–΄λ–€ 도움이 ν•„μš”ν•˜μ‹ κ°€μš”? 🀝"],
            ["이 λ‚΄μš©μ— λŒ€ν•΄ μ’€ 더 μžμ„Ένžˆ μ„€λͺ…ν•΄ μ£Όμ‹€ 수 μžˆλ‚˜μš”? πŸ’‘"],
            ["μ œκ°€ μ΄ν•΄ν•˜κΈ° μ‰½κ²Œ μ„€λͺ…ν•΄ μ£Όμ‹œκ² μ–΄μš”? πŸ“š"],
            ["이 λ‚΄μš©μ„ μ‹€μ œλ‘œ μ–΄λ–»κ²Œ ν™œμš©ν•  수 μžˆμ„κΉŒμš”? 🎯"],
            ["μΆ”κ°€λ‘œ μ‘°μ–Έν•΄ μ£Όμ‹€ λ‚΄μš©μ΄ μžˆμœΌμ‹ κ°€μš”? ✨"],
            ["κΆκΈˆν•œ 점이 더 μžˆλŠ”λ° 여쭀봐도 λ κΉŒμš”? πŸ€”"],
        ],
        inputs=msg,
    )

    # 이벀트 바인딩
    msg.submit(
        chat,
        inputs=[msg, chatbot, file_upload, system_message, max_tokens, temperature, top_p],
        outputs=[msg, chatbot]
    )

    send.click(
        chat,
        inputs=[msg, chatbot, file_upload, system_message, max_tokens, temperature, top_p],
        outputs=[msg, chatbot]
    )

    # 파일 μ—…λ‘œλ“œμ‹œ μžλ™ 뢄석
    file_upload.change(
        lambda: "파일 뢄석을 μ‹œμž‘ν•©λ‹ˆλ‹€...",
        outputs=msg
    ).then(
        chat,
        inputs=[msg, chatbot, file_upload, system_message, max_tokens, temperature, top_p],
        outputs=[msg, chatbot]
    )

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