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import os
import json
import tempfile
import gradio as gr
import openai
from transformers import pipeline

# =========================
# πŸ”§ μ„€μ •
# =========================
openai.api_key = os.environ.get("OPENAI_API_KEY")

# Hugging Face λ²ˆμ—­ νŒŒμ΄ν”„λΌμΈ (μ–‘λ°©ν–₯ 포함)
translator_ko_to_en = pipeline("translation", model="Helsinki-NLP/opus-mt-ko-en")
translator_ko_to_de = pipeline("translation", model="Helsinki-NLP/opus-mt-ko-de")
translator_en_to_ko = pipeline("translation", model="Helsinki-NLP/opus-mt-en-ko")
translator_de_to_ko = pipeline("translation", model="Helsinki-NLP/opus-mt-de-ko")

# =========================
# 🧠 μœ ν‹Έ: OpenAI 호좜
# =========================
def gpt(messages, temperature=0.7, model="gpt-4"):
    """단일 ChatCompletion 래퍼"""
    resp = openai.ChatCompletion.create(
        model=model,
        messages=messages,
        temperature=temperature
    )
    return resp.choices[0].message["content"].strip()

# =========================
# 🧩 핡심 둜직
# =========================
def make_variants(input_text, source_lang, target_lang, direct_translation):
    """
    직역을 κΈ°μ€€μœΌλ‘œ 원어민이 μžμ—°μŠ€λŸ½κ²Œ μ“°λŠ” λ³€ν˜• λ²ˆμ—­ 2개λ₯Ό μΆ”κ°€λ‘œ 생성 (총 3개)
    """
    sys_msg = "You are a bilingual translator who produces concise, natural alternatives."
    user_msg = f"""
[원문] ({source_lang}): {input_text}
[직역] ({target_lang}): {direct_translation}

μœ„ 직역을 κΈ°μ€€μœΌλ‘œ, {target_lang} 원어민이 μ‹€μ œλ‘œ 많이 μ“°λŠ” μžμ—°μŠ€λŸ¬μš΄ λ³€ν˜• 2κ°€μ§€λ₯Ό λ§Œλ“€μ–΄μ€˜.
- λ§₯락: 일상 λŒ€ν™” κΈ°μ€€
- 각 λ³€ν˜•μ€ 1λ¬Έμž₯
- κ³Όμž₯/μŠ¬λž­μ€ κ³Όν•˜μ§€ μ•Šκ²Œ
- 좜λ ₯ ν˜•μ‹:
1) λ³€ν˜•A: ...
2) λ³€ν˜•B: ...
"""
    out = gpt([{"role":"system","content":sys_msg},{"role":"user","content":user_msg}], temperature=0.6)
    # 간단 νŒŒμ‹±
    variants = [direct_translation]
    for line in out.splitlines():
        line = line.strip()
        if line.startswith("1)") or line.lower().startswith("λ³€ν˜•a"):
            variants.append(line.split(":",1)[1].strip() if ":" in line else line)
        elif line.startswith("2)") or line.lower().startswith("λ³€ν˜•b"):
            variants.append(line.split(":",1)[1].strip() if ":" in line else line)
    # fallback
    return variants[:3] if len(variants)>=3 else (variants + ["", ""])[:3]

def back_translate_list(variants, source_lang, target_lang):
    """각 λ³€ν˜• λ²ˆμ—­μ„ λͺ¨κ΅­μ–΄λ‘œ μ—­λ²ˆμ—­ν•˜μ—¬ 비ꡐ ν…Œμ΄λΈ”μš© 데이터 생성"""
    back_list = []
    for v in variants:
        if not v:
            back_list.append("")
            continue
        if source_lang == "ν•œκ΅­μ–΄" and target_lang == "μ˜μ–΄":
            back_ = translator_en_to_ko(v)[0]["translation_text"]
        elif source_lang == "ν•œκ΅­μ–΄" and target_lang == "독일어":
            back_ = translator_de_to_ko(v)[0]["translation_text"]
        else:
            back_ = "(μ—­λ²ˆμ—­ 미지원)"
        back_list.append(back_)
    return back_list

def build_explanations(input_text, variants, source_lang, target_lang):
    """ν‘œν˜„/문법/단어/λ¬Έν™” μ„€λͺ…을 μ„Ήμ…˜λ³„ λ§ˆν¬λ‹€μš΄μœΌλ‘œ 생성"""
    best = variants[0] if variants else ""
    sys_msg = "You are a concise yet friendly language tutor who explains in Korean with clear headings and bullet points."
    user_msg = f"""
λ‹€μŒ ν‘œν˜„μ— λŒ€ν•΄ ν•œκ΅­μ–΄λ‘œ μ„€λͺ…ν•΄μ€˜. κ°„κ²°ν•˜μ§€λ§Œ 핡심은 빠짐없이.

[원문] ({source_lang}): {input_text}
[λŒ€ν‘œ λ²ˆμ—­] ({target_lang}): {best}
[λ‹€λ₯Έ λ³€ν˜• λ²ˆμ—­λ“€]: {variants[1:]}

μ•„λž˜ μ„Ήμ…˜ 제λͺ©μ„ κ·ΈλŒ€λ‘œ μ‚¬μš©ν•΄:
## ν‘œν˜„ μ„€λͺ…
- μ–΄λ–€ 상황/κ΄€κ³„μ—μ„œ μ“°λŠ”μ§€, λ‰˜μ•™μŠ€(격식/친근감)

## 문법 포인트
- 핡심 문법 μš”μ†Œ 2~3개 (쑰사/μ „μΉ˜μ‚¬, μ‹œμ œ, μ–΄μˆœ λ“±)
- 간단 예문 각 1개

## 단어/ν‘œν˜„ μ„€λͺ…
- μ–΄λ €μšΈ 수 μžˆλŠ” 단어/ꡬ절 3개: 의미 + 짧은 예문

## 문화적 차이
- ν•œκ΅­μ–΄μ™€ λŒ€μƒ μ–Έμ–΄ μ‚¬μ΄μ˜ κΈ°λŒ€/예의/κ΄€μŠ΅ 차이 2~3κ°€μ§€
"""
    return gpt([{"role":"system","content":sys_msg},{"role":"user","content":user_msg}], temperature=0.5)

def build_pronunciation(input_text, variants, source_lang, target_lang):
    """발음 κ°€μ΄λ“œ(ν…μŠ€νŠΈ). IPA/κ°•μ„Έ/리듬 포인트"""
    best = variants[0] if variants else ""
    sys_msg = "You provide compact pronunciation guides (IPA-ish, stress, rhythm)."
    user_msg = f"""
λ‹€μŒ 두 λ¬Έμž₯에 λŒ€ν•œ 발음 κ°€μ΄λ“œλ₯Ό ν•œκ΅­μ–΄λ‘œ κ°„λ‹¨νžˆ μ μ–΄μ€˜.

[원문] ({source_lang}): {input_text}
[λŒ€ν‘œ λ²ˆμ—­] ({target_lang}): {best}

ν˜•μ‹:
- 원문: (κ°€λŠ₯ν•˜λ©΄ 간단 IPA/ν•œκΈ€ν‘œκΈ°) + κ°•μ„Έ/리듬 포인트
- λ²ˆμ—­: (IPA/κ°•μ„Έ) + μžμ—°μŠ€λŸ¬μš΄ μ–΅μ–‘ 팁
"""
    return gpt([{"role":"system","content":sys_msg},{"role":"user","content":user_msg}], temperature=0.4)

def build_roleplay(input_text, variants, target_lang):
    """격식/친근 2κ°€μ§€ ν†€μ˜ 짧은 Role Play"""
    best = variants[0] if variants else ""
    sys_msg = "You create short, practical role-play dialogues for language learners."
    user_msg = f"""
λ‹€μŒ ν‘œν˜„μ„ ν™œμš©ν•œ 짧은 λŒ€ν™” 2κ°€μ§€λ₯Ό λ§Œλ“€μ–΄μ€˜. 각 λŒ€ν™”λŠ” 6~8 ν„΄.
- 톀1: 격식(직μž₯/곡적인 상황)
- 톀2: 친근(친ꡬ/κ°€λ²Όμš΄ 상황)
- λŒ€μƒ μ–Έμ–΄: {target_lang}
- λŒ€ν™” ν›„ ν•œκ΅­μ–΄ μš”μ•½ ν•œ 쀄

ν‘œν˜„: "{best}"
"""
    return gpt([{"role":"system","content":sys_msg},{"role":"user","content":user_msg}], temperature=0.7)

def suggest_resources(input_text, target_lang):
    """ν•™μŠ΅ 자료 μΆ”μ²œ: 유튜브/검색 ν‚€μ›Œλ“œ"""
    sys_msg = "You suggest search keywords for YouTube and web to find usage contexts."
    user_msg = f"""
μ•„λž˜ ν‘œν˜„μ„ μ‹€μ œ λ§₯λ½μ—μ„œ λ³Ό 수 μžˆλŠ” 자료λ₯Ό μ°ΎκΈ° μœ„ν•œ 검색 ν‚€μ›Œλ“œλ₯Ό μ œμ•ˆν•΄μ€˜.
- μ–Έμ–΄: {target_lang}
- 5~7개 ν‚€μ›Œλ“œ, λ”°μ˜΄ν‘œ 없이, ν•œ 쀄에 ν•˜λ‚˜
ν‘œν˜„: {input_text}
"""
    out = gpt([{"role":"system","content":sys_msg},{"role":"user","content":user_msg}], temperature=0.5)
    # 클릭 κ°€λŠ₯ν•œ 검색 URL λ¬Έμžμ—΄ 생성
    items = [s.strip("-β€’ ").strip() for s in out.splitlines() if s.strip()]
    md_lines = []
    base = "https://www.youtube.com/results?search_query="
    for k in items:
        url = base + k.replace(" ", "+")
        md_lines.append(f"- [{k}]({url})")
    return "\n".join(md_lines)

# =========================
# πŸš€ 메인 ν•¨μˆ˜ (Gradio에 μ—°κ²°)
# =========================
def run_pipeline(input_text, source_lang, target_lang, favorites_state):
    if not input_text.strip():
        return (
            "", [], None, "", "", "", favorites_state, gr.update(visible=False), None
        )

    # 1) κΈ°λ³Έ λ²ˆμ—­
    if source_lang == "ν•œκ΅­μ–΄" and target_lang == "μ˜μ–΄":
        direct = translator_ko_to_en(input_text)[0]['translation_text']
    elif source_lang == "ν•œκ΅­μ–΄" and target_lang == "독일어":
        direct = translator_ko_to_de(input_text)[0]['translation_text']
    else:
        return (
            input_text, ["(μ§€μ›λ˜μ§€ μ•ŠλŠ” μ–Έμ–΄μŒμž…λ‹ˆλ‹€.)"], None, "(μ§€μ›λ˜μ§€ μ•ŠλŠ” μ–Έμ–΄μŒ)", "", "", favorites_state, gr.update(visible=False), None
        )

    # 2) λ³€ν˜• 3κ°€μ§€
    variants = make_variants(input_text, source_lang, target_lang, direct)

    # 3) μ—­λ²ˆμ—­ ν…Œμ΄λΈ” 데이터
    backs = back_translate_list(variants, source_lang, target_lang)
    back_table = {
        "λ²ˆμ—­(Variant)": variants,
        "μ—­λ²ˆμ—­(λͺ¨κ΅­μ–΄)": backs
    }

    # 4) μ„€λͺ… μ„Ήμ…˜
    explanations_md = build_explanations(input_text, variants, source_lang, target_lang)

    # 5) 발음 κ°€μ΄λ“œ
    pron_md = build_pronunciation(input_text, variants, source_lang, target_lang)

    # 6) Role Play
    roleplay_md = build_roleplay(input_text, variants, target_lang)

    # 7) 자료 μΆ”μ²œ
    resources_md = suggest_resources(input_text, target_lang)

    # 8) 즐겨찾기 μΉ΄λ“œ(ν˜„μž¬ κ²°κ³Ό)
    current_card = {
        "원문": input_text,
        "λŒ€ν‘œ λ²ˆμ—­": variants[0],
        "λ‹€λ₯Έ λ³€ν˜•": variants[1:],
        "μ—­λ²ˆμ—­": backs,
        "μ„€λͺ…": explanations_md,
        "발음": pron_md,
        "role_play": roleplay_md
    }

    # λ‹€μš΄λ‘œλ“œ νŒŒμΌμ€ Save λ²„νŠΌ 클릭 μ‹œ μƒμ„±ν•˜λ„λ‘ ν•˜λ―€λ‘œ μ—¬κΈ°μ„œλŠ” None
    return (
        input_text,
        variants,
        back_table,
        explanations_md,
        pron_md,
        roleplay_md,
        favorites_state,
        gr.update(visible=True),
        resources_md
    )

def save_to_favorites(input_text, variants, backs, explanations_md, pron_md, roleplay_md, favorites_state):
    if favorites_state is None:
        favorites_state = []
    entry = {
        "원문": input_text,
        "λ³€ν˜•λ²ˆμ—­": variants,
        "μ—­λ²ˆμ—­": backs,
        "μ„€λͺ…": explanations_md,
        "발음": pron_md,
        "role_play": roleplay_md
    }
    favorites_state.append(entry)
    return favorites_state, f"μ €μž₯ μ™„λ£Œ! (총 {len(favorites_state)}건)"

def export_favorites(favorites_state):
    if not favorites_state:
        return None
    fd, path = tempfile.mkstemp(suffix=".json")
    with os.fdopen(fd, "w", encoding="utf-8") as f:
        json.dump(favorites_state, f, ensure_ascii=False, indent=2)
    return path

def load_sample(sample_text):
    return gr.update(value=sample_text)

# =========================
# πŸŽ›οΈ Gradio UI
# =========================
with gr.Blocks(title="🌐 λ¬Έν™” κ°„ ν‘œν˜„ 비ꡐ + 문법 & μ–΄νœ˜ λ„μš°λ―Έ (ν™•μž₯판)") as demo:
    gr.Markdown("## 🌐 λ¬Έν™” κ°„ ν‘œν˜„ 비ꡐ + 문법 & μ–΄νœ˜ λ„μš°λ―Έ\nμž…λ ₯ν•œ ν‘œν˜„μ„ 기반으둜 **μžμ—°μŠ€λŸ¬μš΄ λ²ˆμ—­ 3κ°€μ§€, μ—­λ²ˆμ—­ 비ꡐ, 문법/λ¬Έν™” μ„€λͺ…, Role Play, 발음 κ°€μ΄λ“œ**κΉŒμ§€ ν•œ λ²ˆμ—!")

    with gr.Row():
        with gr.Column(scale=5):
            input_text = gr.Textbox(label="비ꡐ할 λ¬Έμž₯ μž…λ ₯", placeholder="예: κ³ μƒν–ˆμ–΄!", lines=2)
            with gr.Row():
                src_dd = gr.Dropdown(["ν•œκ΅­μ–΄"], label="λͺ¨κ΅­μ–΄ 선택", value="ν•œκ΅­μ–΄")
                tgt_dd = gr.Dropdown(["μ˜μ–΄", "독일어"], label="비ꡐ μ–Έμ–΄ 선택", value="μ˜μ–΄")
            with gr.Accordion("μƒ˜ν”Œ λ¬Έμž₯ 뢈러였기", open=False):
                gr.Markdown("- μƒν™©λ³„λ‘œ λ°”λ‘œ ν…ŒμŠ€νŠΈν•΄λ³΄μ„Έμš”.")
                with gr.Row():
                    b1 = gr.Button("친ꡬ μœ„λ‘œ: κ³ μƒν–ˆμ–΄!")
                    b2 = gr.Button("격렀: 수고 λ§Žμ•˜μ–΄, 정말 κ³ λ§ˆμ›Œ.")
                    b3 = gr.Button("업무: 였늘 일정 확인 λΆ€νƒλ“œλ¦½λ‹ˆλ‹€.")
            submit = gr.Button("πŸš€ Submit", variant="primary")

        with gr.Column(scale=7):
            tabs = gr.Tabs()

            with tabs:
                with gr.Tab("κ²°κ³Ό μš”μ•½"):
                    orig_out = gr.Textbox(label="원문", interactive=False)
                    variants_out = gr.HighlightedText(
                        label="λ²ˆμ—­ 3κ°€μ§€ (직역 + μžμ—°μŠ€λŸ¬μš΄ λ³€ν˜•)",
                        combine_adjacent=True
                    )
                    resources_md = gr.Markdown(visible=False)

                with gr.Tab("μ—­λ°©ν–₯ 비ꡐ"):
                    back_table = gr.Dataframe(headers=["λ²ˆμ—­(Variant)", "μ—­λ²ˆμ—­(λͺ¨κ΅­μ–΄)"], interactive=False)

                with gr.Tab("μ„€λͺ…"):
                    explain_out = gr.Markdown()

                with gr.Tab("발음 κ°€μ΄λ“œ"):
                    pron_out = gr.Markdown()

                with gr.Tab("Role Play"):
                    role_out = gr.Markdown()

                with gr.Tab("즐겨찾기"):
                    fav_state = gr.State([])
                    save_btn = gr.Button("⭐ ν˜„μž¬ κ²°κ³Ό μ €μž₯")
                    save_status = gr.Markdown("")
                    export_btn = gr.Button("⬇️ 즐겨찾기 JSON 내보내기")
                    export_file = gr.File(label="λ‹€μš΄λ‘œλ“œ 파일")

    # ---------- 이벀트 바인딩 ----------
    submit.click(
        fn=run_pipeline,
        inputs=[input_text, src_dd, tgt_dd, fav_state],
        outputs=[orig_out, variants_out, back_table, explain_out, pron_out, role_out, fav_state, resources_md, resources_md],
    )

    # μƒ˜ν”Œ λ²„νŠΌ
    b1.click(fn=load_sample, inputs=None, outputs=input_text, _js=None, kwargs={"sample_text":"κ³ μƒν–ˆμ–΄!"})
    b2.click(fn=load_sample, inputs=None, outputs=input_text, kwargs={"sample_text":"수고 λ§Žμ•˜μ–΄, 정말 κ³ λ§ˆμ›Œ."})
    b3.click(fn=load_sample, inputs=None, outputs=input_text, kwargs={"sample_text":"였늘 일정 확인 λΆ€νƒλ“œλ¦½λ‹ˆλ‹€."})

    # 즐겨찾기 μ €μž₯
    save_btn.click(
        fn=save_to_favorites,
        inputs=[orig_out, variants_out, back_table, explain_out, pron_out, role_out, fav_state],
        outputs=[fav_state, save_status]
    )

    # 내보내기
    export_btn.click(fn=export_favorites, inputs=[fav_state], outputs=[export_file])

demo.launch()