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import gradio as gr
import os
import sys
import time
from typing import List, Tuple
from dotenv import load_dotenv

# src ํด๋”๋ฅผ Python ๊ฒฝ๋กœ์— ์ถ”๊ฐ€
sys.path.append(os.path.join(os.path.dirname(__file__), 'src'))

# ์ „์—ญ ๋ณ€์ˆ˜ ์ •์˜ (๋ฐ˜๋“œ์‹œ import ํ›„, ํ•จ์ˆ˜ ์ •์˜ ์ „์—!)
rag_system = None
chat_history = []

load_dotenv()

from src.embeddings import VehicleManualEmbeddings
from src.rag_chain import VehicleManualRAG


def initialize_system():
    """RAG ์‹œ์Šคํ…œ ์ดˆ๊ธฐํ™”"""
    global rag_system  # ์ „์—ญ ๋ณ€์ˆ˜ ์‚ฌ์šฉ ์„ ์–ธ

    if rag_system is not None:
        return "์‹œ์Šคํ…œ์ด ์ด๋ฏธ ์ดˆ๊ธฐํ™”๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค."

    try:
        # ๊ฒฝ๋กœ ์„ค์ •
        project_root = os.path.dirname(os.path.abspath(__file__))
        index_path = os.path.join(project_root, "data", "faiss_index")

        # ๋ฒกํ„ฐ ์ €์žฅ์†Œ ๋กœ๋“œ
        print("๋ฒกํ„ฐ ์ธ๋ฑ์Šค ๋กœ๋”ฉ ์ค‘...")
        embedder = VehicleManualEmbeddings()
        vector_store = embedder.load_index()

        # RAG ์‹œ์Šคํ…œ ์ดˆ๊ธฐํ™” (OpenAI ์‚ฌ์šฉ)
        print("RAG ์‹œ์Šคํ…œ ์ดˆ๊ธฐํ™” ์ค‘...")
        rag_system = VehicleManualRAG(vector_store, use_ollama=True)

        return "์‹œ์Šคํ…œ ์ดˆ๊ธฐํ™” ์™„๋ฃŒ! ์งˆ๋ฌธ์„ ์ž…๋ ฅํ•ด์ฃผ์„ธ์š”."

    except Exception as e:
        return f"์ดˆ๊ธฐํ™” ์‹คํŒจ: {str(e)}"


def answer_question(question: str, history: List[Tuple[str, str]]) -> Tuple[str, List[Tuple[str, str]]]:
    """์งˆ๋ฌธ์— ๋‹ต๋ณ€ํ•˜๊ณ  ์ฑ„ํŒ… ๊ธฐ๋ก ์—…๋ฐ์ดํŠธ"""
    global rag_system  # ์ „์—ญ ๋ณ€์ˆ˜ ์‚ฌ์šฉ ์„ ์–ธ

    if rag_system is None:
        return "๋จผ์ € '์‹œ์Šคํ…œ ์ดˆ๊ธฐํ™”' ๋ฒ„ํŠผ์„ ํด๋ฆญํ•ด์ฃผ์„ธ์š”.", history

    if not question.strip():
        return "", history

    try:
        # RAG ์‹œ์Šคํ…œ์œผ๋กœ ๋‹ต๋ณ€ ์ƒ์„ฑ
        result = rag_system.answer_question(question)

        # ๋‹ต๋ณ€ ํฌ๋งทํŒ…
        answer = result['answer']
        source_pages = result.get('source_pages', [])
        response_time = result.get('response_time', 0)

        # ์ถœ์ฒ˜ ์ •๋ณด ์ถ”๊ฐ€
        if source_pages:
            answer += f"\n\n๐Ÿ“„ **์ถœ์ฒ˜**: ๋งค๋‰ด์–ผ {', '.join(map(str, source_pages[:3]))} ํŽ˜์ด์ง€"
        answer += f"\nโฑ๏ธ ์‘๋‹ต์‹œ๊ฐ„: {response_time:.2f}์ดˆ"

        # ์ฑ„ํŒ… ๊ธฐ๋ก ์—…๋ฐ์ดํŠธ
        history.append((question, answer))

        return "", history

    except Exception as e:
        error_msg = f"์˜ค๋ฅ˜ ๋ฐœ์ƒ: {str(e)}"
        history.append((question, error_msg))
        return "", history


def clear_chat():
    """์ฑ„ํŒ… ๊ธฐ๋ก ์ดˆ๊ธฐํ™”"""
    return [], []


def create_demo():
    """Gradio ๋ฐ๋ชจ ์ธํ„ฐํŽ˜์ด์Šค ์ƒ์„ฑ"""

    with gr.Blocks(title="๐Ÿš— ํŒฐ๋ฆฌ์„ธ์ด๋“œ ๋งค๋‰ด์–ผ AI ์–ด์‹œ์Šคํ„ดํŠธ", theme=gr.themes.Soft()) as demo:
        # ํ—ค๋”
        gr.Markdown("""
        # ๐Ÿš— ํŒฐ๋ฆฌ์„ธ์ด๋“œ 2026 ๋งค๋‰ด์–ผ AI ์–ด์‹œ์Šคํ„ดํŠธ

        ํ˜„๋Œ€ ํŒฐ๋ฆฌ์„ธ์ด๋“œ ์ฐจ๋Ÿ‰ ๋งค๋‰ด์–ผ์— ๋Œ€ํ•œ ์งˆ๋ฌธ์„ ์ž์—ฐ์–ด๋กœ ์ž…๋ ฅํ•˜์„ธ์š”.
        AI๊ฐ€ ๋งค๋‰ด์–ผ์„ ๊ฒ€์ƒ‰ํ•˜์—ฌ ์ •ํ™•ํ•œ ๋‹ต๋ณ€์„ ์ œ๊ณตํ•ฉ๋‹ˆ๋‹ค.

        **์‚ฌ์šฉ ๋ฐฉ๋ฒ•:**
        1. ๋จผ์ € '์‹œ์Šคํ…œ ์ดˆ๊ธฐํ™”' ๋ฒ„ํŠผ์„ ํด๋ฆญํ•˜์„ธ์š”
        2. ์ฐจ๋Ÿ‰ ๊ด€๋ จ ์งˆ๋ฌธ์„ ์ž…๋ ฅํ•˜์„ธ์š”
        3. Enter๋ฅผ ๋ˆ„๋ฅด๊ฑฐ๋‚˜ '์ „์†ก' ๋ฒ„ํŠผ์„ ํด๋ฆญํ•˜์„ธ์š”
        """)

        # ์ดˆ๊ธฐํ™” ์„น์…˜
        with gr.Row():
            init_btn = gr.Button("๐Ÿš€ ์‹œ์Šคํ…œ ์ดˆ๊ธฐํ™”", variant="primary")
            init_status = gr.Textbox(label="์ƒํƒœ", interactive=False)

        # ์ฑ„ํŒ… ์ธํ„ฐํŽ˜์ด์Šค
        chatbot = gr.Chatbot(
            label="๋Œ€ํ™” ๋‚ด์—ญ",
            height=400,
            type="tuples"  # ํƒ€์ž… ๋ช…์‹œ
        )

        with gr.Row():
            msg = gr.Textbox(
                label="์งˆ๋ฌธ ์ž…๋ ฅ",
                placeholder="์˜ˆ: ์—”์ง„์˜ค์ผ ๊ต์ฒด ์ฃผ๊ธฐ๋Š”? / ํƒ€์ด์–ด ๊ณต๊ธฐ์••์€? / ๊ฒฝ๊ณ ๋“ฑ์ด ์ผœ์กŒ์–ด์š”",
                lines=2,
                scale=4
            )
            send_btn = gr.Button("๐Ÿ“ค ์ „์†ก", variant="primary", scale=1)

        # ์˜ˆ์‹œ ์งˆ๋ฌธ ๋ฒ„ํŠผ๋“ค
        gr.Markdown("### ๐Ÿ’ก ์˜ˆ์‹œ ์งˆ๋ฌธ")
        with gr.Row():
            example_btns = [
                gr.Button("์—”์ง„์˜ค์ผ ๊ต์ฒด ์ฃผ๊ธฐ", size="sm"),
                gr.Button("ํƒ€์ด์–ด ์ ์ • ๊ณต๊ธฐ์••", size="sm"),
                gr.Button("์™€์ดํผ ๊ต์ฒด ๋ฐฉ๋ฒ•", size="sm"),
                gr.Button("๊ฒฝ๊ณ ๋“ฑ ๋Œ€์ฒ˜๋ฒ•", size="sm")
            ]

        # ์ปจํŠธ๋กค ๋ฒ„ํŠผ
        with gr.Row():
            clear_btn = gr.Button("๐Ÿ—‘๏ธ ๋Œ€ํ™” ์ดˆ๊ธฐํ™”")

        # ์ถ”๊ฐ€ ์ •๋ณด
        with gr.Accordion("๐Ÿ“Š ์‹œ์Šคํ…œ ์ •๋ณด", open=False):
            gr.Markdown("""
            - **PDF**: LX3_2026_ko_KR.pdf (590ํŽ˜์ด์ง€)
            - **์ฒญํฌ ์ˆ˜**: 6,354๊ฐœ
            - **์ž„๋ฒ ๋”ฉ ๋ชจ๋ธ**: paraphrase-multilingual-MiniLM-L12-v2
            - **๋ฒกํ„ฐ DB**: FAISS
            - **LLM**: GPT-3.5-turbo
            - **ํ‰๊ท  ์‘๋‹ต์‹œ๊ฐ„**: < 2์ดˆ
            """)

        # ์ด๋ฒคํŠธ ์—ฐ๊ฒฐ
        init_btn.click(
            fn=initialize_system,
            outputs=init_status
        )

        # ๋ฉ”์‹œ์ง€ ์ „์†ก
        msg.submit(answer_question, [msg, chatbot], [msg, chatbot])
        send_btn.click(answer_question, [msg, chatbot], [msg, chatbot])

        # ์˜ˆ์‹œ ์งˆ๋ฌธ ๋ฒ„ํŠผ๋“ค
        example_questions = [
            "์—”์ง„์˜ค์ผ ๊ต์ฒด ์ฃผ๊ธฐ๋Š” ์–ผ๋งˆ๋‚˜ ๋˜๋‚˜์š”?",
            "ํƒ€์ด์–ด ์ ์ • ๊ณต๊ธฐ์••์€ ์–ผ๋งˆ์ธ๊ฐ€์š”?",
            "์™€์ดํผ๋ฅผ ์–ด๋–ป๊ฒŒ ๊ต์ฒดํ•˜๋‚˜์š”?",
            "๊ฒฝ๊ณ ๋“ฑ์ด ์ผœ์กŒ์„ ๋•Œ ์–ด๋–ป๊ฒŒ ํ•ด์•ผ ํ•˜๋‚˜์š”?"
        ]

        for btn, question in zip(example_btns, example_questions):
            btn.click(
                lambda q=question: (q, []),
                outputs=[msg, chatbot]
            )

        # ๋Œ€ํ™” ์ดˆ๊ธฐํ™”
        clear_btn.click(clear_chat, outputs=[chatbot, msg])

        # ์ž๋™ ์ดˆ๊ธฐํ™”
        demo.load(fn=initialize_system, outputs=init_status)

    return demo


# ๋ฉ”์ธ ์‹คํ–‰
if __name__ == "__main__":
    print("=" * 60)
    print("ํŒฐ๋ฆฌ์„ธ์ด๋“œ ๋งค๋‰ด์–ผ AI ์–ด์‹œ์Šคํ„ดํŠธ ์‹œ์ž‘")
    print("=" * 60)

    # ํ™˜๊ฒฝ๋ณ€์ˆ˜ ์ฒดํฌ
    if not os.getenv("OPENAI_API_KEY"):
        print("\n๊ฒฝ๊ณ : OPENAI_API_KEY ํ™˜๊ฒฝ๋ณ€์ˆ˜๊ฐ€ ์„ค์ •๋˜์ง€ ์•Š์•˜์Šต๋‹ˆ๋‹ค.")
        print("์„ค์ • ๋ฐฉ๋ฒ•:")
        print("Windows: set OPENAI_API_KEY=sk-...")
        print("Mac/Linux: export OPENAI_API_KEY=sk-...")

        # ์ง์ ‘ ์ž…๋ ฅ ๋ฐ›๊ธฐ
        api_key = input("\nOpenAI API Key๋ฅผ ์ž…๋ ฅํ•˜์„ธ์š” (sk-...): ").strip()
        if api_key:
            os.environ["OPENAI_API_KEY"] = api_key
            print("API Key ์„ค์ • ์™„๋ฃŒ")
        else:
            print("API Key ์—†์ด๋Š” ๊ณ ๊ธ‰ ๋‹ต๋ณ€ ๊ธฐ๋Šฅ์ด ์ œํ•œ๋ฉ๋‹ˆ๋‹ค.")

    # Gradio ๋ฐ๋ชจ ์‹คํ–‰
    demo = create_demo()

    print("\n์›น ์ธํ„ฐํŽ˜์ด์Šค ์‹œ์ž‘ ์ค‘...")
    print("๋ธŒ๋ผ์šฐ์ €์—์„œ ์ž๋™์œผ๋กœ ์—ด๋ฆฝ๋‹ˆ๋‹ค.")
    print("์ˆ˜๋™ ์ ‘์†: http://localhost:7860")
    print("\n์ข…๋ฃŒ: Ctrl+C")

    # ๋ฐ๋ชจ ์‹คํ–‰
    demo.launch(
        server_name="0.0.0.0",
        server_port=7860,
        share=False,
        inbrowser=True
    )