from datetime import datetime
import time
import PyCafe
cafe = PyCafe.CyCafe()
pd=cafe.getPV("BMA1:STA:2")
tz = pd.tsDate
time0 = datetime(tz[0], tz[1], tz[2], tz[3], tz[4], tz[5])
tn  = datetime.now()

time1 = datetime(tn.year, tn.month, tn.day, tn.hour, tn.minute, tn.second)

difference = time1 - time0

minutes = divmod(difference.total_seconds(), 60)
print('Total difference in minutes: ', int(minutes[0]), 'minutes', int(minutes[1]), 'seconds')


def time_difference():
    tn  = datetime.now()
    time1 = datetime(tn.year, tn.month, tn.day, tn.hour, tn.minute, tn.second)
    difference = time1 - time0
    return divmod(difference.total_seconds(), 60)
    


def cb(handle, pv, pvdata):
    global time0
    print(pv, handle)
    pvdata.show()
    tz = pvdata.tsDate
    time0 = datetime(tz[0], tz[1], tz[2], tz[3], tz[4], tz[5])
    print("time0 in callback", time0) 
    
cafe.openMonitorPrepare()
cafe.monitorStart("BMA1:STA:2", cb=cb)
cafe.openMonitorNowAndWait(1.0)

for i in range(0, 360):
    time.sleep(1)
    minutes =  time_difference()
    print('Total difference in minutes: ', int(minutes[0]), 'minutes', int(minutes[1]), 'seconds')
    print("time0 actual", time0)