!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (c) 2017-18 Richard Hull and contributors
# See LICENSE.rst for details.
import time
from datetime import datetime




from luma.led_matrix.device import max7219
from luma.core.interface.serial import spi, noop
from luma.core.virtual import viewport, sevensegment


def date(seg):
    now = datetime.now()
    seg.text = now.strftime("%y-%m-%d")




def clock(seg, seconds):
    interval = 0.5
    for i in range(int(seconds / interval)):
        now = datetime.now()
        seg.text = now.strftime("%H-%M-%S")


        if i % 2 == 0:
            seg.text = now.strftime("%H-%M-%S")
        else:
            seg.text = now.strftime("%H %M %S")


        time.sleep(interval)




def show_message_vp(device, msg, delay=0.1):
    # Implemented with virtual viewport
    width = device.width
    padding = " " * width
    msg = padding + msg + padding
    n = len(msg)


    virtual = viewport(device, width=n, height=8)
    sevensegment(virtual).text = msg
    for i in reversed(list(range(n - width))):
        virtual.set_position((i, 0))
        time.sleep(delay)




def show_message_alt(seg, msg, delay=0.1):
    width = seg.device.width
    padding = " " * width
    msg = padding + msg + padding


    for i in range(len(msg)):
        seg.text = msg[i:i + width]
        time.sleep(delay)

ddef main():
    serial = spi(port=0, device=0, gpio=noop())
    device = max7219(serial, cascaded=1)
    seg = sevensegment(device)

    date = 'date'
    scroll = 'scroll'
    exit = 'exit'
    display = 'display'
    Display = 'Display'
    clear = 'clear'
    while True:
        print("")
        print("time      =          Uhrzeit")
        print("date      =            Datum")
        print("scroll    =   Scrolling-Text")
        print("display   =  Displaying-TExt")
        print("exit      =             Exit")
        print("")
        Input = raw_input("What will you do? ")


        if Input == time:
            print ("")
            print ("Time will be showen for 60 ")
            clock(seg, seconds=60)
            seg.text = ""


        elif Input == date:
            print ("")
            print ("Datum für 60 Sekunden aktiviert")
            date(seg)
            time.sleep(60)
            seg.text = ""


        elif Input == scroll:
            print("")
            Scroll = raw_input("What should scroll? ")
            print ("Scrolling "+Scroll+" ")
            show_message_alt(seg,""+Scroll+"")
#            print ("Scrolling "+Scroll+" ")


        elif Input == display:
            print ("")
            print ("Maximal 8 Buchstaben / Zeichen")
            Display = raw_input("What should display? ")
            print ("Displaying "+Display+"; 'clear' for a clean Display")
            seg.text = (" "+Display+" ")
#           time.sleep(10)
#           seg.text = ""


        elif Input == clear:
            print("")
            print("Clean Display")
            seg.text = ""


        elif Input == exit:
            seg.text = (" ")
            break


        else:
            print ("Unkown command / For Exit 'exit' or 'Ctrl + C'")


if __name__ == '__main__':
    main()