# A robot encounters a door. If the door is locked, the robot
# should be instructed to turn around.  If instead the door is
# unlocked, the robot should be instructed to open the door and
# enter the room. Note, before entering the robot should determine
# whether the light is off. If it is off, the robot should be
# instructed to first turn on the light.

# Get status of the door
reply = input( 'Door (locked / unlocked): ' )

# Put in standard format -- all lowercase
door_sensor = reply.strip().lower()

print()

# Based on door sensor take action
if ( door_sensor == 'locked' ) :
    # Cannot enter -- the door is locked
    print( "Turn around" )

else :
    # We can go in
    print( "Open the door" )

    # Need to get status of light sensor
    reply = input( "Light (on / off): " ) # we can overwrite what was previously in reply since we don't care about
    # what was previously in there anymore. we stored the cleaned up version in a different variable, door_sensor
    print()
    # clean up the status of the light sensor
    light_sensor = reply.strip().lower()

    if ( light_sensor == "off" ) : # this is a nested if statement, since it's an if statement in an if statement
        print( "Turn on the light" )
    # don't need an else, because no action is necessary if the light is already on

    # Can enter because the door is open and the light is on

    #   print( "Enter room" ) on this indentation level would only execute if the light is off, but we want to
    # instruct the robot to enter the room regardless of the light status, since if it is off we have already turned
    # it on
    print( "Enter room" )
    # this needs to be on this indentation level because if the door was locked the robot cannot enter the room
    # control what indentation level you're on using the tab key ( above caps lock on your keyboard )


# All done
# pass v. ...
# ... is a value (that you can't do much with)
# pass says i want code here, but i don't know what that code is just yet
# pass is a no-op -> no operation
# it says to just continue on
# take the pass statements out and replace it with code, similar to how we've previously used ...