# Timing Gate Code
# File TimingGate7.py
# 26/10/22  this program is for the both gates
# if function switch Pin2 is Up (0 / False) it is the Start gate, which just outputs to Radio
# if it is Down (1, True) then Finish Gate which displays time.

from microbit import *
import time
import random
import radio

radio.config(group=17)

############################
#                          #
#      StartGate           #
#                          #
############################
def StartGate():
    display.show('S')
    radio.on()
    localstate = 1  # assume beam not interrupted
    time.sleep(1)

    while True:
        if localstate == 0:
            if pin1.read_digital():   # if not interrupted
                display.show(3)
                radio.send('3')
                localstate = 1
            
        else:     
            if (pin1.read_digital() ==False):    # interrupted
                display.show(2)
                radio.send('2')
                localstate = 0
        if button_a.is_pressed():
            display.show('A')
            radio.send('A')
            time.sleep(0.5)

############################
#                          #
#     FinishGate           #
#                          #
############################
def FinishGate():
    display.show('F')
    radio.on()
    localstate = 1  # assume beam not interrupted
    time.sleep(1)
	
    while True:
        if localstate == 0:
            if pin1.read_digital():
                display.show(1)
                localstate = 1
            
        else:  # localstate 1
            if pin1.read_digital() ==False:
                display.show(0)
                localstate = 0
    
        message = radio.receive()
        if message:
            display.show(message)
            if message == 'A':
                break
    
        if button_a.is_pressed():
            break

    display.clear()
    # Await start signal (local or via radio)#
    while True:
        if pin1.read_digital() ==False:
            break
        message = radio.receive()
        if message == '2':
            break

    ##### start of race        
    t1 = time.ticks_ms()
    display.show(Image('99999:'
                       '99999:'
                       '99999:'
                       '99999:'
                       '99999'))
                       
 
    while pin1.read_digital()==False: # while beam not interrupted
        time.sleep(0.5)
        
    ##### await passing under finish gate#
    x = 0
    while pin1.read_digital(): # while beam not interrupted
        x += 1
        if x == 100:
            x = 0
            dif=time.ticks_diff(time.ticks_ms(),t1)/1000 # sesonds
            display.show(int(dif))
        time.sleep(0.01)
        
    t2 = time.ticks_ms()
    # display result
    display.clear()
    l=time.ticks_diff(t2,t1)/1000
    while True:
        display.show(l, delay=1000)
        display.clear()
        time.sleep(1)
 # end of function FinishGate()
 
 
# Main program...
############################
#                          #
#        Main              #
#                          #
############################

while True:
    if pin2.read_digital():  # true if 1: Finish gate
        FinishGate()
    else:
        StartGate()          # run start gate