# The maximum number of input ports (in addition to ctrl_in)
NPORTS=5

# Build an array of input ports after the ctrl input
def buildportsarray(np):
    portsarray=["ctrl_in"]
    for p in xrange(0,np):
        portsarray.append("in_%d" %p)

    return portsarray

# Define input and output ports
config(
    #backend='jack-rt',
    client_name = 'mdd-RandomFollowSeq',
    in_ports = buildportsarray(NPORTS),
    out_ports = [ 
	'out',
	]
)

# Returns a dictionnary of Scenes, one per input port minus the control (first) port
def routing_scenes(ports):
    return dict(
        (p, Scene("Port %d" % (p+1),
              PortFilter(p+1) >> Port(1)
        ))
        for p in range(1, ports+1)
    )

# Global variable for the scenes that are active, i.e. the ports on which there is a midi signal
ACTIVESCENES=set()
ACTIVESCENES.add(1)


# Activate scenes only once a CC119 is detected
def activatescene(ev):
    newscene=ev.port-1
    if 1 <= newscene <= NPORTS+1:
        if newscene not in ACTIVESCENES:
            ACTIVESCENES.add(newscene)
            print("activated scene %d" %newscene + " for port %d" %ev.port)


# Picks a random scene in the set of active scenes
def randscene(ev):
#    ev.port=randint(1,NPORTS)
    pickedscene=sample(ACTIVESCENES,1)[0]
    switch_scene(pickedscene)
    return ev

run(
# Create scenes for each port
    scenes=routing_scenes(NPORTS),
    control = [
        # activate a scene once CC119 is detected
                CtrlFilter(119) >> Call(activatescene),
        # Call random scene when the control port detects a CC119
                PortFilter(1) >> CtrlFilter(119) >> Call(randscene)
        ]
)