# This file will use an external interrupt on another pin that "External Interrupt.py"
from machine import Pin
import time
from tm1637 import TM1637


#Variable declarations
global total_seconds # total_seconds is the countdown time in seconds
terminal_count=10 # Terminal count is when the count down clock ends, make 1 sec more thatn you want to show
dvd_pwr_offset =0 # This variable is the reduction from the full count to when we power on the DVD
dvd_start_offset =2 # This variable is when we issue a play command offset from the full count
dvd_stop_offset=15  # This variable is when we issue a stop command offset from the full count
dvd_pwrD_offset = 30    # This variable is when we power down the DVD offset from the full count
total_seconds=0

# GPIO definition
pps=Pin(15,Pin.IN, Pin.PULL_UP)
rst = Pin(16, Pin.IN,Pin.PULL_UP)
countdownP=Pin(17, Pin.IN, Pin.PULL_UP)
DVD_PWR=Pin(20, machine.Pin.OUT)
DVD_Start=Pin(21,machine.Pin.OUT)
DVD_STOP=Pin(22,machine.Pin.OUT)
#First trun off the DVD
DVD_PWR.value(1)
DVD_Start.value(1)
DVD_STOP.value(1)


#Set up the display
display=TM1637(dio=Pin(26),clk=Pin(27))
display.write([0, 0, 0, 0])

# there are 4 banks of switches that will determine the count down
# M10 is 10's of minutes
# M1 is 1's of minutes
# S10 is 10's of seconds
# S1 is ones of seconds

M10 = 0
M1 = 0
S10 = 1
S1 = 3
#turn this into negative time
M10=-M10


DVD_Count=0

def countdown(pps):
    global total_seconds,DVD_Count,DVD_PWR
  
    # Calculate the tens of minutes, minutes, tens of seconds, and seconds
    tens_of_minutes = abs(total_seconds) // 600
    minutes = (abs(total_seconds) % 600) // 60
    tens_of_seconds = (abs(total_seconds) % 60) // 10
    seconds = abs(total_seconds) % 10

    # Format the time as a string
    time_str = "{:01d}{:01d}{:01d}{:01d}".format(tens_of_minutes, minutes, tens_of_seconds, seconds)

    # Add a minus sign if the time is negative
    if total_seconds < 0:
        time_str = "-" + time_str[1:]

    if total_seconds > 0:
        time_str=" "+time_str[1:]


    # Display the time on the TM1637 displaydisplay.show
    display.show(time_str, True)
    #print(dvd_pwr_offset,DVD_Count)

    if DVD_Count-dvd_pwr_offset ==0:
        #print("DVD power on")
        DVD_PWR.value(0)
        time.sleep(.25)
        DVD_PWR.value(1)

    if DVD_Count - dvd_start_offset ==0:
        #print ("DVD start")
        DVD_Start.value(0)
        time.sleep(.25)
        DVD_Start.value(1)

    if DVD_Count -dvd_stop_offset ==0:
        #print("DVD stop")
        DVD_STOP.value(0)
        time.sleep(.25)
        DVD_STOP.value(1)
    
    DVD_Count +=1

    # Decrement the total seconds
    total_seconds +=1
    #print(total_seconds,terminal_count)

    if total_seconds ==terminal_count:
        pps.irq(handler=None)
        return


while True:
    
    # This is the main loop. Reset has happened and we wait for the 1 PPS signal

    
    # Check to see if the reset button was pushed
    rstV=rst.value()
    if rstV==0:
        cdv=1
        
        #start the DVD here
        total_seconds = S1 + (S10 * 10) + (M1 * 60) + (M10 * 600)
        
        # Calculate the minutes and seconds from total seconds
        mins, secs = divmod(total_seconds, 60)
        # Format the time string
        time_format = f"{mins:02}:{secs:02}"
    
        # Calculate tens of minutes
        tens_of_minutes = total_seconds // 600
        remaining_seconds = total_seconds % 600

        # Calculate minutes
        minutes = remaining_seconds // 60
        remaining_seconds = remaining_seconds % 60

        # Calculate tens of seconds
        tens_of_seconds = remaining_seconds // 10

        # Calculate seconds
        seconds = remaining_seconds % 10
        total_seconds=-total_seconds

       
        # Format the time as a string
        time_str = "{:01d}{:01d}{:01d}{:01d}".format(tens_of_minutes, minutes, tens_of_seconds, seconds)
        #print(time_str)

        # Add a minus sign if the time is negative
        #if total_seconds < 0:
        time_str = "-" + time_str[1:]


        # Display the time on the TM1637 displaydisplay.show
        display.show(time_str, True)
        pps.irq(handler=None)
        


        
    cdv=countdownP.value()
        

    if cdv ==0:
            
        DVD_Count =0
        #print(DVD_Count)
        pps.irq(trigger=Pin.IRQ_FALLING, handler=countdown)