app.py

import gradio as gr
from openai import OpenAI
from huggingface_hub import InferenceClient
import os
import time
import requests
import urllib.parse
import pandas as pd
from langchain_huggingface import HuggingFaceEmbeddings
from langchain_community.vectorstores import FAISS
from PIL import Image
from dotenv import load_dotenv
import emotion # 情緒辨識

load_dotenv()

# ==========================================
# 0. 環境變數 & 1. 系統初始化 (保持不變)
# ==========================================
GROQ_API_KEY = os.getenv("GROQ_API_KEY")
HF_TOKEN = os.getenv("HF_TOKEN")

global_df = None
global_mood_df = None
global_retriever = None
rag_initialized = False

def init_rag_system():
    global global_df, global_mood_df, global_retriever, rag_initialized
    if rag_initialized: return
    try:
        global_df = pd.read_csv('restaurants.csv')
        global_df['RAG_Content'] = global_df['RAG_Content'].fillna("")
        global_df['Category'] = global_df['Category'].fillna("其他")
        global_mood_df = pd.read_csv('mood_food_guide.csv')
    except Exception: pass
    if os.path.exists("faiss_index"):
        try:
            embeddings = HuggingFaceEmbeddings(model_name="sentence-transformers/all-MiniLM-L6-v2")
            vectorstore = FAISS.load_local("faiss_index", embeddings, allow_dangerous_deserialization=True)
            global_retriever = vectorstore.as_retriever(search_kwargs={"k": 3})
        except Exception: pass
    rag_initialized = True

# ==========================================
# 2. 核心功能
# ==========================================
def get_restaurant_data(mood_score_str, food_choice):
    init_rag_system()
    if global_df is None or global_df.empty: return None, True, "資料庫未載入", "無建議"
    try: score = int(str(mood_score_str).split(' ')[0])
    except: score = 3
    mood_info = global_mood_df[global_mood_df['分數'] == score]
    if not mood_info.empty:
        rec_categories = mood_info.iloc[0]['推薦料理類別']
        mood_reason = mood_info.iloc[0]['原因']
    else:
        rec_categories = ""
        mood_reason = "隨意探索"
    candidates = global_df.copy()
    if rec_categories:
        candidates = candidates[candidates['Category'].apply(lambda x: str(x) in str(rec_categories) or str(rec_categories) in str(x))]
    food_keyword = "飯" if food_choice == "吃飯" else "麵" if food_choice == "吃麵" else ""
    if food_keyword:
        candidates = candidates[candidates['Name'].str.contains(food_keyword, case=False, na=False) | candidates['RAG_Content'].str.contains(food_keyword, case=False, na=False)]
    if candidates.empty:
        result = global_df.sample(1).iloc[0]; is_random = True
    else:
        result = candidates.sample(1).iloc[0]; is_random = False
    return result, is_random, rec_categories, mood_reason

def generate_content_with_groq(restaurant_name, restaurant_detail, user_diary, mood_score, mood_guide_reason, debug_mode=False):
    if not GROQ_API_KEY: return "⚠️ 請設定 GROQ_API_KEY", ""
    
    client = OpenAI(api_key=GROQ_API_KEY, base_url="https://api.groq.com/openai/v1")
    
    system_prompt = "你是一個幽默、懂吃且善解人意的 AI 朋友。請根據使用者的日記、心情以及「心情美食指南」來推薦餐廳。"
    user_msg = f"""
        【狀態】心情分數：{mood_score}，日記：{user_diary}
        【心情美食指南建議】
        因為分數是 {mood_score}，建議吃這類食物的原因是：「{mood_guide_reason}」。
        
        【推薦餐廳】
        名稱：{restaurant_name}
        資料：{restaurant_detail}
        
        任務：
        請用繁體中文寫一段溫暖有趣的回覆：
        1. 先回應他的日記與測驗人設。
        2. 引用「心情美食指南」的原因，告訴他為什麼現在適合吃這家餐廳（例如：「就像指南說的，現在你需要一點多巴胺...」）。
        3. 介紹這家餐廳的特色。
        (只需要回覆文字內容)
    """
    
    debug_log = ""
    if debug_mode:
        debug_log = f"""
### 🔧 Groq Prompt Debug
**System Prompt:**
{system_prompt}

**User Message:**
{user_msg}
"""

    try:
        response = client.chat.completions.create(model="llama-3.3-70b-versatile", messages=[{"role": "system", "content": system_prompt}, {"role": "user", "content": user_msg}])
        content = response.choices[0].message.content
        return content, debug_log
    except Exception as e: 
        return f"Groq Error: {str(e)}", debug_log

def generate_image_huggingface(prompt):
    if not HF_TOKEN: return None
    try:
        hf_client = InferenceClient(token=HF_TOKEN)
        return hf_client.text_to_image(prompt=prompt, model="stabilityai/stable-diffusion-xl-base-1.0")
    except: return None

def mood_agent_logic(score_input, food_input, diary_input, debug_mode):
    restaurant, is_random, rec_categories, mood_reason = get_restaurant_data(score_input, food_input)
    if restaurant is None: yield "資料庫讀取錯誤", None, "", gr.update(); return
    
    name = restaurant['Name']; address = restaurant['Address']; url = restaurant['URL']; img_prompt = restaurant.get('Visual_prompt')
    
    rag_info = str(restaurant.get('RAG_Content', ''))
    if global_retriever:
        docs = global_retriever.invoke(name)
        if docs: rag_info = "\n".join([d.page_content for d in docs])
        
    ai_text, groq_debug_log = generate_content_with_groq(name, rag_info, diary_input, score_input, mood_reason, debug_mode)
    
    full_debug_log = ""
    if debug_mode:
        img_debug_log = f"""
### 🎨 Image Prompt Debug
**Visual Prompt:**
{img_prompt}
"""
        full_debug_log = groq_debug_log + "\n\n" + img_debug_log

    debug_output_update = gr.update(value=full_debug_log, visible=debug_mode)

    final_response = f"### 🍽️ 推薦：{name}\n\n{ai_text}"
    map_html = f'<div style="text-align:center"><a href="{url}" target="_blank" style="background:#4CAF50;color:white;padding:8px 16px;border-radius:20px;text-decoration:none">🗺️ Google Map 導航</a></div>'
    
    yield final_response, None, map_html, debug_output_update
    
    image_output = generate_image_huggingface(img_prompt)
    yield final_response, image_output, map_html, debug_output_update


# ==========================================
# 3. 橋接邏輯 (Bridge Functions)
# ==========================================

def _score_to_radio_value(score):
    mapping = {1: "1 (心情差)", 2: "2 (不太好)", 3: "3 (普通)", 4: "4 (不錯)", 5: "5 (超棒)"}
    try: score = int(score)
    except: score = 3
    return mapping.get(score, "3 (普通)")

def bridge_start_click(st):
    res = emotion.on_restart(st)
    return res[1], res[0], gr.update(visible=True), res[5], res[4], gr.update(visible=False)

def bridge_stop_click(st):
    res = emotion.on_stop(st)
    return res[1], res[0], gr.update(visible=False), res[5], res[4]

def bridge_predict_frame(frame, st):
    res = emotion.on_stream(frame, st)
    out_cam = res[0]; out_result = res[1]; out_st = res[4]; out_btn_start = res[5]
    score_update = gr.update(); tabs_update = gr.update(); out_btn_stop = gr.update()
    out_btn_stop = gr.update()
    btn_go_visible = gr.update(visible=False)

    if out_st.finished and hasattr(out_st, 'final_score'):
        new_val = _score_to_radio_value(out_st.final_score)
        score_update = gr.update(value=new_val)
        out_btn_stop = gr.update(visible=False)
        btn_go_visible = gr.update(visible=True)
        
    return out_cam, out_result, out_st, out_btn_stop, out_btn_start, score_update, btn_go_visible


# ==========================================
# 4. Gradio 介面建構
# ==========================================
css_ = "#app_container { max-width: 960px; margin: 0 auto; }" 

with gr.Blocks(title="AI 心情食堂", css=css_) as demo:
    
    st_state = gr.State(emotion.AppState())

    with gr.Tabs() as tabs:
        
        # Tab 1: 情緒辨識
        with gr.TabItem("😊 情緒辨識 (Step 1)", id=0):
            with gr.Column(elem_id="app_container"):
                gr.Markdown("### 第一步：測測你的心情能量\n讓 AI 看看你的表情，自動幫你決定心情分數！(辨識完畢會自動跳轉)")
                
                with gr.Row():
                    btn_start = gr.Button("📸 開啟攝影機辨識", variant="primary")
                    btn_stop  = gr.Button("⏹️ 停止", variant="secondary", visible=False)

                cam = gr.Image(sources=["webcam"], streaming=True, type="numpy", label="攝影機畫面", visible=False)
                result_markdown = gr.Markdown(emotion._hint_html("請按「開啟攝影機辨識」並允許瀏覽器使用相機。"))
                btn_go_dining = gr.Button("🚀 確定心情，來找餐廳！", variant="primary", visible=False, size="lg")

        # Tab 2: 主功能區
        with gr.TabItem("🍽️ AI 心情食堂 (Step 2)", id=1):
            with gr.Column():
                gr.Markdown(f"## 🍱 今天想吃點什麼？")
                with gr.Row():
                    with gr.Column(scale=1):
                        score_input = gr.Radio(
                            ["1 (心情差)", "2 (不太好)", "3 (普通)", "4 (不錯)", "5 (超棒)"], 
                            label="1. 心情分數 (由 Tab 1 自動填入)", 
                            value="3 (普通)"
                        )
                        food_input = gr.Radio(["吃飯", "吃麵", "隨便"], label="2. 想吃什麼", value="隨便")
                        diary_input = gr.Textbox(lines=4, label="3. 心情日記", placeholder="寫下今天發生的事...")
                        # debug_mode_btn = gr.Checkbox(label="🔧 開啟除錯模式", value=False)
                        
                        submit_btn = gr.Button("🍱 送出給 Agent", variant="primary")
                        
                        debug_output = gr.Markdown(label="除錯資訊 (Debug Log)", visible=False)
                    
                    with gr.Column(scale=1):
                        agent_output = gr.Markdown(label="AI 回應")
                        image_output = gr.Image(label="AI 推薦美食圖", type="pil", width=400)
                        map_output = gr.HTML(label="地圖導航")

    # ==========================================
    # 事件綁定
    # ==========================================

    btn_start.click(
        fn=bridge_start_click,
        inputs=[st_state],
        outputs=[result_markdown, cam, btn_stop, btn_start, st_state, btn_go_dining],
        show_progress="minimal"
    )

    btn_stop.click(
        fn=bridge_stop_click,
        inputs=[st_state],
        outputs=[result_markdown, cam, btn_stop, btn_start, st_state],
        show_progress="minimal"
    )

    cam.stream(
        fn=bridge_predict_frame,
        inputs=[cam, st_state],
        outputs=[cam, result_markdown, st_state, btn_stop, btn_start, score_input, btn_go_dining], 
        show_progress="minimal"
    )

    btn_go_dining.click(
        fn=lambda: gr.Tabs(selected=1),
        inputs=None,
        outputs=tabs
    )

    submit_btn.click(
        fn=mood_agent_logic,
        inputs=[score_input, food_input, diary_input],
        outputs=[agent_output, image_output, map_output, debug_output] 
    )

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