# The following is a program to develop the logic for setting and triggering the alarms
# in the Arduino Timer Project
# The array used is the same array as the Arduino gets from the SD Card.
# The arduino does not have an easy array length function as python has so the NoF or
# Number of fields variable that exists in the rest of the Arduino sketch to pick up the
# Array values will have to be used.

times = [1386347400,1386563400,1387548000,1389155400,1389967200,1390278600,1397743200,1398141000,1398348000,1398659400,1401458400,1401769800,1414159200,1414470600]
NowTime=1386347000    # This is the current time in Unix Time format. This will come from the RTC
StatusFlag = False  #Is the HWC enabled or not?
RedLED = False  #LED pin control.This will be used to indicate the Red LED state for available times exceeded. Basically if this goes off you will need to put more dates in the SD Card
YellowLED=False #Yellow LED indicator to show that the HWC element is enabled.
GreenLED=False  #Green LED indicater to show that the system is working.
NoF = 14        #This is the number of fields in the array. It is found in the Arduino sketch.

AlarmDateOn=0 #This is the variable to simulate the alarm function.  It will be used to call a subroutine if the time matches the AlarmDate.  This coding will not be needed for the Arduino.
AlarmDateOff=0

# Catchup function
def Catchup (a,b):
    while a<NowTime:
        a=a+604800    # Add a week's worth of seconds
        b=b+604800
    return [a,b]




# Setup Catchup - this jumps the Weekend alarms forward a week at a time until they are in the
# future.
print (NowTime)
print (times[0],times[1])
if times[0]< NowTime:
    WkEnds = Catchup(times[0],times[1])  # Call the catchup function
    times[0]=WkEnds[0]
    times[1]=WkEnds[1]

# Step through the times[] array components to find the next START of the holiday period.
InDexer = 2
while times[InDexer]<NowTime:   # Check to see if the date is in the future.
    InDexer = InDexer + 2       # Adding two means we look ONLY at the start dates.
    if InDexer >= NoF-1:    # Have we exceeded the list?  If so enable the error light
        RedLED = True
        break

print (times[0],times[1])
print (RedLED)
print (InDexer)
print ('Holiday Alarm', times[InDexer],times[InDexer+1])


# Void Loop
# The following section will loop the NowTime to simulate the info from the RTC.
# To carry over into this new section the up-to-date InDexer will be used to work out
# Which Holiday periods are coming up and which alarm goes next.
# The Weekends will be set to skip forward if it turns out that a holiday period is
# coming up next.
# The alarms willbe reset ONLY after the end alarm date has passed.

while NowTime < 1414900000: #Start the timing loop.
    dd = AlarmDateOn    #This is justa holder to help with debugging
    ee = AlarmDateOff    #This is another holder to help with debugging
    if ((times[0]> times[InDexer]) and (RedLED == True)):  # It would be a holiday but the list has been exceeded
        AlarmDateOn = times[0]    # In the Arduino this will load the date into the Alarm function
        AlarmDateOff = times[1]
    elif ((times[0]>times[InDexer]) and (RedLED == False)): #The next item is a holiday and the list is OK.
        AlarmDateOn = times[InDexer]
        AlarmDateOff = times[InDexer+1]  # Loads the Holiday times into the Alarm function
        while times[0]< times[InDexer+1]:
            times[0]=times[0]+604800    #Advance the weekend dates to be clear of the holiday
            times[1]=times[1]+604800
    else:                           # Normal Weekend
        AlarmDateOn = times[0]    # In the Arduino this will load the date into the Alarm function
        AlarmDateOff = times[1]
    if NowTime > times[1]:
        times[0]=times[0]+604800    #Advance the weekend dates to the next one once the
        times[1]=times[1]+604800    #current weekend is finished
    if NowTime > times[InDexer+1]:
        InDexer = InDexer+2     #Advance the pointer the the next holiday once current one
                                #finished.
        if InDexer >= NoF-1:    # Have we exceeded the list?  If so enable the error light
            RedLED = True               # But carry on by setting InDexer to last good figure
            InDexer = InDexer - 2
    if NowTime == AlarmDateOn:
        StatusFlag = True
        YellowLED = True
    if NowTime == AlarmDateOff:
        StatusFlag = False
        YellowLED = False
    if dd != AlarmDateOn:   #The following lines are to produce a new dump of the alarms
        print (AlarmDateOn) #Whenever a date is triggered.
    if ee != AlarmDateOff:
        print (AlarmDateOff)
    NowTime = NowTime + 50   #The design of the logic is robust and can cope with 50second steps or more.
                            #How this will impact on the operation of the alarms has yet to be seen.
                            # A trial with the Arduino will be required.