from synapse.platforms import *

#-------------------------------------------------------------------------------

DOORBELL_DISABLE_RINGER_GPIO = GPIO_3
DOORBELL_RING_GPIO = GPIO_4
DOORBELL_SENSE_BUTTON_GPIO = GPIO_6

#-----------------

doorbell_sense_timeout = 0
doorbell_sense_last = False

#-------------------------------------------------------------------------------

@setHook(HOOK_STARTUP)
def startupEvent():

    #Turn on LED to show operation
    setPinDir(GPIO_1, True)
    writePin(GPIO_1, True)

    #Toggle LED to show operating
    setPinDir(GPIO_2, True)
    #writePin(GPIO_2, True)
    pulsePin(GPIO_2, 1000, True)

    #Set outputs
    setPinDir(DOORBELL_DISABLE_RINGER_GPIO, True)
    setPinDir(DOORBELL_RING_GPIO, True)

#-----------------

@setHook(HOOK_1S)
def hook_1s():
    
    #Doorbell sense debug
    #doorbell_sense_debug()

    #Sense doorbell reset timeout
    sense_doorbell_timeout()

@setHook(HOOK_100MS)
def hook_100ms():

    #Check doorbell input for change
    sense_doorbell()

#-----------------

#Sense doorbell
def sense_doorbell():
    global doorbell_sense_last

    #If able to sense (i.e. not during timeout)
    if (doorbell_sense_timeout == 0):

        #Read current doorbell press status
        status = readPin(DOORBELL_SENSE_BUTTON_GPIO)

        #Check for change
        if (doorbell_sense_last != status):

            #If bell rung (GPIO changed to low)
            if (status == False):

                print 'Doorbell Ring'
                mcastRpc(1, 10, 'doorbell_ring_handle')
                
                #Force ring for at least 1 second
                doorbell_ring(1000);
                
            #Save last doorbell status
            doorbell_sense_last = status

#Sense doorbell timeout reset
def sense_doorbell_timeout():
    global doorbell_sense_timeout

    #Decrement doorbell sense timeout
    if (doorbell_sense_timeout > 0):
        doorbell_sense_timeout = doorbell_sense_timeout - 1
        #print 'Doorbell Timeout: ', doorbell_sense_timeout

#Disable doorbell
def doorbell_disable_ringer(status):

    #Disable/enable ringer
    writePin(DOORBELL_DISABLE_RINGER_GPIO, status)

#Ring doorbell
def doorbell_ring(duration_ms):
    global doorbell_sense_timeout

    #Turn on bell for specified duration
    pulsePin(DOORBELL_RING_GPIO, duration_ms, True)

    #Set timeout such that ringing does not create a loop that is detected and causes further triggering
    doorbell_sense_timeout = (duration_ms + 1000) / 1000

#Doorbell sense debug
def doorbell_sense_debug():
    
    status = readPin(DOORBELL_SENSE_BUTTON_GPIO)
    print "Doorbell: ", status

    writePin(GPIO_2, status)