from tkinter import *
import datetime
import pytz
from math import *
from R2Graph import *

def main():
    root = Tk()
    root.title("Analog Clock")
    root.geometry("500x500")
    panel = Frame(root)
    panel.pack(side=TOP, fill=X)
    drawArea = Canvas(root, bg="silver")
    drawArea.pack(side=TOP, expand=True, fill=BOTH)

    tzNumber = IntVar()

    def onChangeTimezone():
        # print("tzNumber =", tzNumber.get())
        redraw()

    radionButtonLocal = Radiobutton(
        panel, text="Local time", variable=tzNumber, value=0,
        command=onChangeTimezone
    )
    radionButtonLocal.pack(side=LEFT, padx=4, pady=4)

    radionButtonMoscow = Radiobutton(
        panel, text="Moscow", variable=tzNumber, value=1,
        command=onChangeTimezone
    )
    radionButtonMoscow.pack(side=LEFT, padx=4, pady=4)

    radionButtonDushanbe = Radiobutton(
        panel, text="Dushanbe", variable=tzNumber, value=2,
        command=onChangeTimezone
    )
    radionButtonDushanbe.pack(side=LEFT, padx=4, pady=4)
    tzNumber.set(0)

    tzMoscow = pytz.timezone("Europe/Moscow")
    tzDushanbe = pytz.timezone("Asia/Dushanbe")

    idHourHand = 0
    idMinuteHand = 0
    idSecondHand = 0

    margin = 0.1
    ex = R2Vector(250.*(1.-margin), 0.)
    ey = R2Vector(0., -250.*(1.-margin))
    center = R2Point(250., 250.)

    rHour = 0.5; wHour = 0.04
    rMinute = 0.7; wMinute = 0.025
    rSecond = 0.9; wSecond = 0.015

    tzMoscow = pytz.timezone("Europe/Moscow")
    tzDushanbe = pytz.timezone("Asia/Dushanbe")

    def drawFace():
        w = drawArea.winfo_width()
        h = drawArea.winfo_height()
        center.x = w/2.; center.y = h/2.
        ex.x = w/2.*(1.-margin)
        ey.y = -h/2.*(1.-margin)
        leftTop = center - ex + ey
        rightBottom = center + ex - ey
        drawArea.create_oval(
            leftTop.x, leftTop.y,
            rightBottom.x, rightBottom.y,
            fill="white", outline="black", width=4
        )
        for i in range(60):
            angle = pi/2. - i*(2.*pi/60.)
            r = 0.95; tickW = 3
            if i%5 == 0:
                r = 0.9; tickW = 5
            v = ex*cos(angle) + ey*sin(angle)
            p0 = center + v*r
            p1 = center + v
            drawArea.create_line(
                (p0.x, p0.y), (p1.x, p1.y),
                fill="black", width=tickW
            )
            if i%5 == 0:
                # Draw minute numbers
                m = 12 if i == 0 else i//5
                txt = str(m)
                p3 = center + v*0.75
                drawArea.create_text(
                    p3.x, p3.y,
                    text=txt, font=("Times", 32)
                )

    def drawHand(v, n, color):
        t = []
        t.append(center - v*0.2)
        t.append(center - n)
        t.append(center + v)
        t.append(center + n)
        p = [ (pnt.x, pnt.y) for pnt in t ]
        idHand = drawArea.create_polygon(
            p, fill=color, outline=color
        )
        return idHand

    def drawHands():
        nonlocal idHourHand, idMinuteHand, idSecondHand
        # Erase old hands
        if idHourHand != 0:
            drawArea.delete(idHourHand)
        if idMinuteHand != 0:
            drawArea.delete(idMinuteHand)
        if idSecondHand != 0:
            drawArea.delete(idSecondHand)

        tzNum = tzNumber.get()
        if tzNum == 1:
            dt = datetime.datetime.now(tz=tzMoscow)
        elif tzNum == 2:
            dt = datetime.datetime.now(tz=tzDushanbe)
        else:
            dt = datetime.datetime.now()

        # Draw hour hand
        angle_cw = (
            (2.*pi/12.)*dt.hour +
            ((2.*pi/12.)/60.)*dt.minute +
            ((2.*pi/12.)/3600.)*dt.second
        )
        angle = pi/2. - angle_cw
        v = ex*cos(angle) + ey*sin(angle)
        n = v.normal()
        idHourHand = drawHand(v*rHour, n*wHour, "darkBlue")

        # Draw minute hand
        angle_cw = (
            ((2.*pi)/60.)*dt.minute +
            ((2.*pi)/3600.)*dt.second
        )
        angle = pi/2. - angle_cw
        v = ex*cos(angle) + ey*sin(angle)
        n = v.normal()
        idMinuteHand = drawHand(v*rMinute, n*wMinute, "darkGreen")

        # Draw minute hand
        angle_cw = (
            ((2.*pi)/60.)*dt.second
        )
        angle = pi/2. - angle_cw
        v = ex*cos(angle) + ey*sin(angle)
        n = v.normal()
        idSecondHand = drawHand(v*rSecond, n*wSecond, "red")

    def redraw():
        drawArea.delete("all")
        idHourHand = 0
        idMinuteHand = 0
        idSecondHand = 0
        drawFace()
        drawHands()

    drawArea.bind("<Configure>", lambda e: redraw())

    def animate():
        drawHands()
        drawArea.after(1000, animate)

    root.update()
    drawArea.after(100, animate)    # Start animation

    root.mainloop()

if __name__ == "__main__":
    main()