import  ch.psi.pshell.epics.ControlledVariable as ControlledVariable
import  ch.psi.pshell.epics.Camtool as Camtool

if get_exec_pars().source == CommandSource.ui:
    start   = 0.0
    stop    = 180.0
    step    = 30.0
    nb      = 2
    lat     = 0.100
else:
    start = args[0]
    stop  = args[1]
    step  = args[2]
    nb    = int(args[3])
    lat   = args[4]

disp = 0.32
energy0 = 6.5
    
phase =  ControlledVariable("Phase", "SINEG01-RSYS:SET-VSUM-PHASE-SIM", "SINEG01-RSYS:GET-VSUM-PHASE-SIM")
phase.config.minValue   =-45.0
phase.config.maxValue   = 360.0
phase.config.resolution = 0.5
phase.initialize()

#camtool = Camtool("sflca:10000")
camtool.start("simulation")
x  = camtool.getValue("gr_x_fit_mean")
dx = camtool.getValue("gr_x_fit_standard_deviation")

#x  =  Channel("SINEG01-DSCR190:X-SIM",  type = 'd', alias='SCR-X')
#dx =  Channel("SINEG01-DSCR190:DX-SIM", type = 'd', alias='SCR-DX')


try:
    r = lscan(phase, [x, dx], start, stop, step , latency=lat)
    rf_phase = r.getPositions(0)
    E   = [val.mean/1000.0/disp*energy0 for val in r.getReadable(0)]
    dE  = [val.mean/1000.0/disp*energy0 for val in r.getReadable(1)]
finally:
    phase.close()
#    camtool.close()

p = plot(None)[0]
p.clear()
p.addSeries(LinePlotSeries("Energy"))
p.addSeries(LinePlotSeries("Energy spread"))
p.getSeries(0).setData(to_array(rf_phase, 'd'), E)    
p.getSeries(1).setData(to_array(rf_phase, 'd'), dE)    
p.setLegendVisible(True)
#plot((E, dE), xdata = rf_phase, title="Phase scan")