from datetime import datetime
import pytz
import tkinter as tk

# 都市とタイムゾーン
cities = {
    "Japan (Tokyo)"      : "Asia/Tokyo",
    "Thailand (Bangkok)" : "Asia/Bangkok",
    "India (Delhi)"      : "Asia/Kolkata",
    "Ukraine (Kyiv)"     : "Europe/Kyiv",
    "Germany (Berlin)"   : "Europe/Berlin",
    "UK (London)"        : "Europe/London",
    "New York"           : "America/New_York",
    "Los Angeles"        : "America/Los_Angeles"
}

# メインウィンドウ
root = tk.Tk()
root.title("World Clock")
root.geometry("500x350")

# タイトル
title = tk.Label(
    root,
    text="World Clock",
    font=("Arial", 20, "bold")
)
title.pack(pady=10)

# 時計表示ラベル
labels = {}

for city in cities:
    label = tk.Label(
        root,
        text="",
        font=("Courier", 14),
        anchor="w"
    )
    label.pack(fill="x", padx=20)

    labels[city] = label

# 時刻更新関数
def update_clock():

    for city, timezone in cities.items():

        tz = pytz.timezone(timezone)

        now = datetime.now(tz)

        current_time = now.strftime("%Y-%m-%d  %H:%M:%S")

        labels[city].config(
            text=f"{city:<22} : {current_time}"
        )

    # 1000ms後に再実行
    root.after(1000, update_clock)

# 更新開始
update_clock()

# GUI開始
root.mainloop()