# 載入字體
if os.path.exists(font_filename):
    return fm.FontProperties(fname=font_filename)
return None

# 計算 BMR
bmr = (10 * weight + 6.25 * height - 5 * age + 5) if gender == "男" else (10 * weight + 6.25 * height - 5 * age - 161)

# 計算 TDEE
factors = {
    "久坐 (幾乎不運動)": 1.2, "輕度 (每週運動 1-3 天)": 1.375, 
    "中度 (每週運動 3-5 天)": 1.55, "高度 (每週運動 6-7 天)": 1.725, 
    "極高度 (高強度訓練/勞力工作)": 1.9
}
act_factor = factors.get(activity_level, 1.2)
tdee_base = bmr * act_factor
daily_activity_cal = tdee_base - bmr

# 計算運動消耗
cal_walk = 3.5 * weight * (t_walk / 60)
cal_weight = 6.0 * weight * (t_weight / 60)
cal_cardio = 7.0 * weight * (t_cardio / 60)
cal_hiit = 12.0 * weight * (t_hiit / 60)
total_exercise_cal = cal_walk + cal_weight + cal_cardio + cal_hiit
total = tdee_base + total_exercise_cal

# --- 繪圖 ---
labels = ['基礎代謝 (BMR)', '日常活動消耗', '今日運動消耗']
sizes = [bmr, daily_activity_cal, total_exercise_cal]
colors = ['#a8dadc', '#457b9d', '#e63946']
explode = (0, 0, 0.1)

fig, ax = plt.subplots(figsize=(6, 4))
valid_data = [(l, s, c, e) for l, s, c, e in zip(labels, sizes, colors, explode) if s > 0]

if valid_data:
    v_labels, v_sizes, v_colors, v_explode = zip(*valid_data)
    wedges, texts, autotexts = ax.pie(v_sizes, explode=v_explode, labels=v_labels, colors=v_colors, 
                                      autopct='%1.1f%%', shadow=True, startangle=140)
    if my_font:
        for text in texts + autotexts:
            text.set_fontproperties(my_font)
        ax.set_title(f"今日熱量消耗 (總計 {total:.0f} kcal)", fontproperties=my_font, fontsize=15)
    else:
        ax.set_title(f"Total: {total:.0f} kcal", fontsize=15)

# --- HTML 報告 ---
ex_details = ""
if total_exercise_cal > 0:
    ex_details += "<ul style='margin-top:5px; padding-left:20px; color:#555;'>"
    if t_walk > 0: ex_details += f"<li>散步: {cal_walk:.0f} kcal</li>"
    if t_weight > 0: ex_details += f"<li>重訓: {cal_weight:.0f} kcal</li>"
    if t_cardio > 0: ex_details += f"<li>有氧: {cal_cardio:.0f} kcal</li>"
    if t_hiit > 0: ex_details += f"<li>高強度: {cal_hiit:.0f} kcal</li>"
    ex_details += "</ul>"
else:
    ex_details = "<span style='color:#888; font-size:0.9em;'>(無額外運動)</span>"

output_html = f"""
<div style='background-color: #ffffff; padding: 20px; border-radius: 15px; border: 1px solid #eee;'>
    <h3 style='color: #1d3557; margin: 0 0 10px 0;'>📋 數據明細</h3>
    <p>🔥 基礎代謝: <b>{bmr:.0f}</b></p>
    <p>🏠 日常消耗: <b>{daily_activity_cal:.0f}</b> (不含運動)</p>
    <p>💪 運動消耗: <b style='color:#e63946;'>{total_exercise_cal:.0f}</b></p>
    {ex_details}
    <hr>
    <div style='text-align:center; color:#e63946; font-weight:bold; font-size:1.5em;'>
        總計: {total:.0f} kcal
    </div>
</div>
"""
return output_html, fig