import os
import traceback
############################PGM+ID1+ID2###################################################
if str(SET_OFFSETS) == "1":
    print "Setting offsets"
    if RUNTYPE in ["+/-", "+" , "-"]:  
        caput(OTF_MODE1,1) # circ + in ID1 
        caput(OTF_MODE2,2) # circ - in ID
    elif RUNTYPE in ["LH/LV", "LH", "LV"]:
        caput(OTF_MODE1,0)
        caput(OTF_MODE2,0)
        wait_channel(OTF_DONE, 1, type = 'i')
        caput(OTF_ALPHA1, 0.0)  # LH in ID1
        caput(OTF_ALPHA2, 90.0) # LV in ID2
        wait_channel(OTF_DONE, 1, type = 'i') 
    else:
        raise Exception("Invalid run type: " +  RUNTYPE) 
       
    caput(OTF_OFF1,OFFSET1)
    caput(OTF_OFF2,OFFSET2-40) #detune ID2
    wait_channel(OTF_DONE, 1, type = 'i')
    print "Offsets are set"
    import sys
    sys.exit(0)
else:
    print "Running full script"
        
file_prefix = time.strftime("%y%m%d")
input_path =  "/sls/X11MA/Data1/public/X11MA/temp/"+file_prefix+"/"
output_path = input_path #+file_prefix+"/" #"/sls/X11MA/Data1/public/e10989/"+file_prefix+"/"


#Parameters
"""
E1 = 680
E2 = 750
TIME = 2 #min
DELAY = 10.0 #s
OFFSET1 = 1.0 #eV
OFFSET2 = -1.0 #eV
PREFIX = 'Data'
RUNTYPE = "+/-"
ROUNDS = 1
PLOT_TYPE = 1
"""
print "\nStarting energy scan - Parameters: ",
print E1,E2,TIME,DELAY,OFFSET1,OFFSET2,RUNTYPE#,ALPHA1,ALPHA2


###############################################################################
# Plotting
###############################################################################

task = None
running = False

def _startPlot(type):
    global running
    print "Starting plot: type " + str(type)
    running = True
    p = plot(None,name="Energy")[0]
    s = p.getSeries(0)
    cur = 0
    time.sleep(3.0)
    while running: 
        try:
            if  otf_start.read() == 0:
                break
            e = energy.read()
            if (abs(e-cur)) > 0.1:            
                v = abs((keithley_2a.read() / ((keithley_1a if (type==1) else keithley_3a).read() )))
                s.appendData(e,v)    
                cur = e
            time.sleep(0.2)
        except:
            pass
    print "Done Plotting"
            

def startPlot(type = 1):
    global task
    task = fork((_startPlot,(type,)),)        

def stopPlot():
    global task, running
    running = False
    ret = join(task)

    
############################PGM+ID1+ID2###################################################


def switchpol(activeID, runtype):
    global pol_str
    if activeID == 1:
        caput(OTF_OFF1,OFFSET2)
        caput(OTF_OFF2,OFFSET2-40) #detune ID2
        if runtype in ["+/-", "+"]:
            pol_str = "circ +"
        elif runtype in ["LH/LV", "LH"]:
            pol_str = "Lin. Horizontal"
    elif activeID == 2:
        caput(OTF_OFF1,OFFSET1-40) #detune ID1
        caput(OTF_OFF2,OFFSET2)
        if runtype in ["+/-", "-"]: 
            pol_str = "circ -"
        elif runtype in ["LH/LV", "LV"]:
            pol_str = "Lin. Vertical"
    else:
        raise Exception("Invalid parameter")


pol_str = None
polswitch = 1

fid = get_next_fid(input_path, "o" + file_prefix)



###############################################################################
#Prepare scan
###############################################################################
#caput ("X11PHS-E:OPT","PGM+ID1+ID2")

number_of_scans = 1
if RUNTYPE in ["+/-", "+", "-"]:
    caput(OTF_MODE1,2) # circ + in ID1 
    caput(OTF_MODE2,2) # circ - in ID2
    wait_channel(OTF_DONE, 1, type = 'i')
    if RUNTYPE == "+/-":
        number_of_scans = 2 * ROUNDS
    else: 
        number_of_scans = ROUNDS
elif RUNTYPE in ["LH/LV", "LH", "LV"]:
    caput(OTF_MODE1,0)
    caput(OTF_MODE2,0)
    wait_channel(OTF_DONE, 1, type = 'i')
    caput(OTF_ALPHA1, 0.0)  # LH in ID1
    caput(OTF_ALPHA2, 90.0) # LV in ID2
    wait_channel(OTF_DONE, 1, type = 'i')
    if RUNTYPE == "LH/LV":
        number_of_scans = 2 * ROUNDS
    else:
        number_of_scans = ROUNDS
else:
    raise Exception("Invalid run type: " +  RUNTYPE)

if RUNTYPE in ["-", "LV"]:
    switchpol(2, RUNTYPE) # tune ID2 --> polarization: C- or LV
    polswitch = 0
elif RUNTYPE in ["+/-", "+", "LH/LV", "LH"]:
    switchpol(1, RUNTYPE) # tune ID1 --> polarization: C+ or LH
time.sleep(1.0)

wait_channel(OTF_DONE, 1, type = 'i')

open_vg10()
time.sleep(0.5)
open_vg11()
time.sleep(0.5)
open_vg12()
time.sleep(0.5)
open_vg13()

for scan_no  in range(number_of_scans):
    suffix = ("%03d" % fid)
    input_file = input_path + "o" + file_prefix + "_" + suffix + ".dat" 

    caput(OTF_E1, E1)
    caput(OTF_E2, E2)
    caput(OTF_TIME, TIME)
    caput(OTF_FTS,file_prefix)
    caput(OTF_FID,fid)
    time.sleep(2.0) 
    caput(OTF_ESET, E1)
    wait_channel(OTF_DONE, 1, type = 'i')
    time.sleep(DELAY)    
    time.sleep(2.0)

    startPlot(PLOT_TYPE)
    #Start the OTF scan
    #caput(OTF_START, 'GO')
    otf_start.write(1)
    time.sleep(3.0)
    
    try:
        #wait_channel(OTF_START, 'STOP', timeout = int(TIME*60), type = 's')
        otf_start.waitValue(0, (15 + int(TIME*60)) *1000)        
    except:
        print "********    OTF STOP TIMEOUT   **********"
        otf_start.write(0)    
    finally:
        stopPlot()
    
    time.sleep(5.0)
    #TODO: wait for file instead of sleep
    #Convert file
    output_file = output_path+"os"+file_prefix+"_" + suffix + ".dat"

    print("Converting data file: " + output_file);               
    convert_file(input_file, output_file, pol_str)
    plot_file(output_file, file_prefix+"_" + suffix) #"Scan " + str(scan_no+1))

    if RUNTYPE in ["+/-", "LH/LV"]:
        if polswitch == 1:
            switchpol(2, RUNTYPE) # tune ID2 --> polarization: C- or LV
            polswitch = 0
        else:
            polswitch = 1
            switchpol(1, RUNTYPE) # tune ID1 --> polarization: C+ or LH
    else:
        print "running in one polarization mode, no switching"
        
    time.sleep(3.0)
    fid = fid + 1

caput(OTF_ESET, E1) 
close_vg13()

print "Finished Energy scan"

print("Success")