import os
import gradio as gr
import pandas as pd
import matplotlib.pyplot as plt
import matplotlib.font_manager as fm
from config import DEFAULT_ICR, DEFAULT_ISF
from insulin_calc import calculate_insulin_dose
from sqlite_handler import save_result_to_db
from carb_calc import calculate_actual_carbs
from font_setup import font_properties
from ui.ui_history_tab import create_history_tab
from datetime import datetime, timedelta, timezone

def get_now_jst():
    JST = timezone(timedelta(hours=9))
    return datetime.now(JST)

def get_now_jst_str():
    return get_now_jst().strftime("%Y-%m-%d %H:%M")

def get_dynamic_icr(hour):
    return 9.6 if 6 <= hour < 11 else 12.5

def get_default_timing_id(hour):
    if 7 <= hour < 10:
        return 1  # 朝食
    elif 11 <= hour < 14:
        return 2  # 昼食
    elif 14 <= hour < 18:
        return 4  # おやつ
    elif 18 <= hour < 21:
        return 3  # 夕食（夜食から変更）
    elif 22 <= hour or hour < 1:
        return 6  # 寝前
    else:
        return 5  # 追加

def process_input(carb_grams, current_bg):
    now = get_now_jst()
    icr_value = get_dynamic_icr(now.hour)
    
    try:
        current_bg = float(current_bg)
    except ValueError:
        return "血糖値は必須です。数値を入力してください。", "", ""

    if carb_grams is None or carb_grams == "":
        carb_grams = 0.0
    try:
        carb_grams = float(carb_grams)
    except ValueError:
        return "炭水化物量が無効です", "", ""

    result = calculate_insulin_dose(carb_grams, current_bg)
    return f"""
    ## 推奨インスリン計算

    - 炭水化物用インスリン: {result['carb_insulin']} 単位
    - 補正インスリン: {result['correction_insulin']} 単位
    - 合計インスリン: {result['total_insulin']} 単位
    - 目標血糖値: {result['expected_bg']} mg/dL
    """, DEFAULT_ICR, DEFAULT_ISF

def record_to_db(carb_grams, current_bg, actual_insulin, timing_id, timestamp_text):
    now = get_now_jst()
    icr_value = get_dynamic_icr(now.hour)
    
    try:
        current_bg = float(current_bg)
        carb_grams = float(carb_grams) if carb_grams else 0.0
        actual_insulin = float(actual_insulin) if actual_insulin else 0.0
    except ValueError:
        return "数値を正しく入力してください。"

    result = calculate_insulin_dose(carb_grams, current_bg)
    return save_result_to_db(
        carb_grams,
        current_bg,
        DEFAULT_ICR,
        DEFAULT_ISF,
        result,
        actual_insulin,
        timing_id,
        timestamp_text
    )

def create_ui():
    with gr.Blocks(title="血糖値管理システム") as app:
        gr.Markdown("# 血糖値管理システム")

        with gr.Tab("血糖・インスリン記録"):
            with gr.Row():
                with gr.Column():
                    now = get_now_jst()
                    icr_value = get_dynamic_icr(now.hour)
                    
                    bg = gr.Number(label="現在の血糖値 (mg/dL)", value=120)
                    carb = gr.Number(label="糖質 (g)（任意）", value=None)
                    icr = gr.Number(label="ICR", value=icr_value, interactive=False)
                    isf = gr.Number(label="ISF", value=DEFAULT_ISF, interactive=False)
                    btn_calc = gr.Button("計算")
                    out = gr.Markdown()
                with gr.Column():
                    actual_input = gr.Number(label="実際インスリン量 (単位)（任意）", value=None)
                    default_timing_id = get_default_timing_id(now.hour)
                    
                    timing_input = gr.Radio(
                        label="インスリンタイミング",
                        choices=[("朝食", 1), ("昼食", 2), ("夜食", 3),
                                 ("おやつ", 4), ("追加", 5), ("寝前", 6)],
                        value=default_timing_id
                    )
                    timestamp_input = gr.Textbox(label="記録時刻（YYYY-MM-DD HH:MM）（任意）", value=get_now_jst_str, placeholder="空欄で現在時刻")
                    btn_record = gr.Button("記録")
                    out2 = gr.Textbox()

            btn_calc.click(fn=process_input, inputs=[carb, bg], outputs=[out, icr, isf])
            btn_record.click(fn=record_to_db, inputs=[carb, bg, actual_input, timing_input, timestamp_input], outputs=out2)

        with gr.Tab("炭水化物量計算"):
            std_food = gr.Number(label="標準食べ物量 (g)", value=100)
            std_carb = gr.Number(label="表示炭水化物量 (g)", value=15)
            actual = gr.Number(label="実際食べた量 (g)", value=50)
            carb_result = gr.Textbox()
            btn_carb = gr.Button("計算")
            btn_carb.click(fn=calculate_actual_carbs, inputs=[std_food, std_carb, actual], outputs=carb_result)

        with gr.Tab("履歴管理"):
            create_history_tab()

    return app