is_panel = get_exec_pars().source != CommandSource.ui #Must be checked before callin "run"
run("Devices/Elements")
run("Devices/WireScanner")

if is_panel:
    prefix = args[0]
    sel = args[1]
    start = args[2]
    end = args[3]
    cycles = args[4]
    velocity = args[5]
    bpm3 = args[6]
else:
    prefix = "SINDI01-DWSC090" #"SARCL02-DWSC270"
    sel = WireScanner.W1X
    start = -200
    end = 200
    cycles = 5
    velocity = 200
    bpm3 = None

#Creating WireScanner object
if prefix not in get_wire_scans():
    raise Exception("Invalid wire scan: " + prefix)
scanner = WireScanner(prefix, sel, start, end, cycles, velocity, True)

#Stream channels
bs_position = scanner.motor_bs_readback.get_name()    
bpms = get_wire_scans_bpms(prefix)
if bpms is None:
    raise Exception("Cannot determine wire scan bpms: " + prefix)
channels = [("w_pos", bs_position)]    
if bpm3 is not None: 
    bpms.append(bpm3) 

for i in range (len(bpms)):
    channels.append (("bpm" + str(i+1) + "_x", bpms[i] + ":X1"))
    channels.append (("bpm" + str(i) + "_y", bpms[i] + ":Y1"))
    channels.append (("bpm" + str(i) + "_q", bpms[i] + ":Q1"))

#Stream creation
st = Stream("pulse_id", dispatcher)
for c in channels:
    st.addScalar(c[0], c[1], 10, 0)   
st.initialize()
st.start()
st.waitCacheChange(10000)
scanner.scan()
scanner.waitState(State.Busy, 60000)

#End of  scan checking
scan_complete=False
def check_end_scan(record, scan):
    global scan_complete
    if scanner.isReady():
        print "Abort Scan"
        scan_complete=True
        scan.abort()

#Metadata
def write_metadata(path):
    try:
        set_attribute(path, "Wire Scan", prefix)    
        set_attribute(path, "Selection", sel)    
        set_attribute(path, "Range", scaner.scan_range)    
        set_attribute(path, "Cycles", scanner.cycles )    
        set_attribute(path, "Velocity", scanner.velocity )  
    except: 
        pass     
            
#Scan            
try:    
    mscan (st, st.getReadables() +[scanner.curr_cycl]  , -1, scanner.get_total_time() * 2.0, after_read =check_end_scan) # *2.0  to account for accelerations an dother delays             
except:        
    if not scanner.isReady():
        print "Aborting  Wire Scan"
        scanner.abort()
    if not scan_complete:
        raise
finally:
    write_metadata(get_exec_pars().scanPath)
    print "Closing scanner"
    scanner.close()
    st.close()