def main():
    """
    NAME
        hysteresis_magic.py

    DESCRIPTION
        calculates hystereis parameters and saves them in rmag_hystereis format file
        makes plots if option selected

    SYNTAX
        hysteresis_magic.py [command line options]

    OPTIONS
        -h prints help message and quits
        -usr USER:   identify user, default is ""
        -f: specify input file, default is agm_measurements.txt
        -fh: specify rmag_hysteresis.txt input file
        -F: specify output file, default is rmag_hysteresis.txt
        -P: do not make the plots
        -spc SPEC: specify specimen name to plot and quit
        -sav save all plots and quit
        -fmt [png,svg,eps,jpg]
    """
    args = sys.argv
    PLT = 1
    plots = 0
    user, meas_file, rmag_out, rmag_file = "", "agm_measurements.txt", "rmag_hysteresis.txt", ""
    pltspec = ""
    dir_path = '.'
    fmt = 'svg'
    verbose = pmagplotlib.verbose
    version_num = pmag.get_version()
    if '-WD' in args:
        ind = args.index('-WD')
        dir_path = args[ind+1]
    if "-h" in args:
        print(main.__doc__)
        sys.exit()
    if "-usr" in args:
        ind = args.index("-usr")
        user = args[ind+1]
    if '-f' in args:
        ind = args.index("-f")
        meas_file = args[ind+1]
    if '-F' in args:
        ind = args.index("-F")
        rmag_out = args[ind+1]
    if '-fh' in args:
        ind = args.index("-fh")
        rmag_file = args[ind+1]
        rmag_file = dir_path+'/'+rmag_file
    if '-P' in args:
        PLT = 0
        irm_init, imag_init = -1, -1
    if '-sav' in args:
        verbose = 0
        plots = 1
    if '-spc' in args:
        ind = args.index("-spc")
        pltspec = args[ind+1]
        verbose = 0
        plots = 1
    if '-fmt' in args:
        ind = args.index("-fmt")
        fmt = args[ind+1]
    rmag_out = dir_path+'/'+rmag_out
    meas_file = dir_path+'/'+meas_file
    rmag_rem = dir_path+"/rmag_remanence.txt"
    #
    #
    meas_data, file_type = pmag.magic_read(meas_file)
    if file_type != 'magic_measurements':
        print(main.__doc__)
        print('bad file')
        sys.exit()
    #
    # initialize some variables
    # define figure numbers for hyst,deltaM,DdeltaM curves
    HystRecs, RemRecs = [], []
    HDD = {}
    if verbose:
        if verbose and PLT:
            print("Plots may be on top of each other - use mouse to place ")
    if PLT:
        HDD['hyst'], HDD['deltaM'], HDD['DdeltaM'] = 1, 2, 3
        pmagplotlib.plot_init(HDD['DdeltaM'], 5, 5)
        pmagplotlib.plot_init(HDD['deltaM'], 5, 5)
        pmagplotlib.plot_init(HDD['hyst'], 5, 5)
        imag_init = 0
        irm_init = 0
    else:
        HDD['hyst'], HDD['deltaM'], HDD['DdeltaM'], HDD['irm'], HDD['imag'] = 0, 0, 0, 0, 0
    #
    if rmag_file != "":
        hyst_data, file_type = pmag.magic_read(rmag_file)
    #
    # get list of unique experiment names and specimen names
    #
    experiment_names, sids = [], []
    for rec in meas_data:
        meths = rec['magic_method_codes'].split(':')
        methods = []
        for meth in meths:
            methods.append(meth.strip())
        if 'LP-HYS' in methods:
            if 'er_synthetic_name' in list(rec.keys()) and rec['er_synthetic_name'] != "":
                rec['er_specimen_name'] = rec['er_synthetic_name']
            if rec['magic_experiment_name'] not in experiment_names:
                experiment_names.append(rec['magic_experiment_name'])
            if rec['er_specimen_name'] not in sids:
                sids.append(rec['er_specimen_name'])
    #
    k = 0
    locname = ''
    if pltspec != "":
        k = sids.index(pltspec)
        print(sids[k])
    while k < len(sids):
        s = sids[k]
        if verbose and PLT:
            print(s, k+1, 'out of ', len(sids))
    #
    #
        # B,M for hysteresis, Bdcd,Mdcd for irm-dcd data
        B, M, Bdcd, Mdcd = [], [], [], []
        Bimag, Mimag = [], []  # Bimag,Mimag for initial magnetization curves
        first_dcd_rec, first_rec, first_imag_rec = 1, 1, 1
        for rec in meas_data:
            methcodes = rec['magic_method_codes'].split(':')
            meths = []
            for meth in methcodes:
                meths.append(meth.strip())
            if rec['er_specimen_name'] == s and "LP-HYS" in meths:
                B.append(float(rec['measurement_lab_field_dc']))
                M.append(float(rec['measurement_magn_moment']))
                if first_rec == 1:
                    e = rec['magic_experiment_name']
                    HystRec = {}
                    first_rec = 0
                    if "er_location_name" in list(rec.keys()):
                        HystRec["er_location_name"] = rec["er_location_name"]
                        locname = rec['er_location_name'].replace('/', '-')
                    if "er_sample_name" in list(rec.keys()):
                        HystRec["er_sample_name"] = rec["er_sample_name"]
                    if "er_site_name" in list(rec.keys()):
                        HystRec["er_site_name"] = rec["er_site_name"]
                    if "er_synthetic_name" in list(rec.keys()) and rec['er_synthetic_name'] != "":
                        HystRec["er_synthetic_name"] = rec["er_synthetic_name"]
                    else:
                        HystRec["er_specimen_name"] = rec["er_specimen_name"]
            if rec['er_specimen_name'] == s and "LP-IRM-DCD" in meths:
                Bdcd.append(float(rec['treatment_dc_field']))
                Mdcd.append(float(rec['measurement_magn_moment']))
                if first_dcd_rec == 1:
                    RemRec = {}
                    irm_exp = rec['magic_experiment_name']
                    first_dcd_rec = 0
                    if "er_location_name" in list(rec.keys()):
                        RemRec["er_location_name"] = rec["er_location_name"]
                    if "er_sample_name" in list(rec.keys()):
                        RemRec["er_sample_name"] = rec["er_sample_name"]
                    if "er_site_name" in list(rec.keys()):
                        RemRec["er_site_name"] = rec["er_site_name"]
                    if "er_synthetic_name" in list(rec.keys()) and rec['er_synthetic_name'] != "":
                        RemRec["er_synthetic_name"] = rec["er_synthetic_name"]
                    else:
                        RemRec["er_specimen_name"] = rec["er_specimen_name"]
            if rec['er_specimen_name'] == s and "LP-IMAG" in meths:
                if first_imag_rec == 1:
                    imag_exp = rec['magic_experiment_name']
                    first_imag_rec = 0
                Bimag.append(float(rec['measurement_lab_field_dc']))
                Mimag.append(float(rec['measurement_magn_moment']))
    #
    # now plot the hysteresis curve
    #
        if len(B) > 0:
            hmeths = []
            for meth in meths:
                hmeths.append(meth)
            hpars = pmagplotlib.plot_hdd(HDD, B, M, e)
            if verbose and PLT:
                pmagplotlib.draw_figs(HDD)
    #
    # get prior interpretations from hyst_data
            if rmag_file != "":
                hpars_prior = {}
                for rec in hyst_data:
                    if rec['magic_experiment_names'] == e:
                        if rec['hysteresis_bcr'] != "" and rec['hysteresis_mr_moment'] != "":
                            hpars_prior['hysteresis_mr_moment'] = rec['hysteresis_mr_moment']
                            hpars_prior['hysteresis_ms_moment'] = rec['hysteresis_ms_moment']
                            hpars_prior['hysteresis_bc'] = rec['hysteresis_bc']
                            hpars_prior['hysteresis_bcr'] = rec['hysteresis_bcr']
                            break
                if verbose:
                    pmagplotlib.plot_hpars(HDD, hpars_prior, 'ro')
            else:
                if verbose:
                    pmagplotlib.plot_hpars(HDD, hpars, 'bs')
                HystRec['hysteresis_mr_moment'] = hpars['hysteresis_mr_moment']
                HystRec['hysteresis_ms_moment'] = hpars['hysteresis_ms_moment']
                HystRec['hysteresis_bc'] = hpars['hysteresis_bc']
                HystRec['hysteresis_bcr'] = hpars['hysteresis_bcr']
                HystRec['hysteresis_xhf'] = hpars['hysteresis_xhf']
                HystRec['magic_experiment_names'] = e
                HystRec['magic_software_packages'] = version_num
                if hpars["magic_method_codes"] not in hmeths:
                    hmeths.append(hpars["magic_method_codes"])
                methods = ""
                for meth in hmeths:
                    methods = methods+meth.strip()+":"
                HystRec["magic_method_codes"] = methods[:-1]
                HystRec["er_citation_names"] = "This study"
                HystRecs.append(HystRec)
    #
        if len(Bdcd) > 0:
            rmeths = []
            for meth in meths:
                rmeths.append(meth)
            if verbose and PLT:
                print('plotting IRM')
            if irm_init == 0:
                HDD['irm'] = 5
                pmagplotlib.plot_init(HDD['irm'], 5, 5)
                irm_init = 1
            rpars = pmagplotlib.plot_irm(HDD['irm'], Bdcd, Mdcd, irm_exp)
            RemRec['remanence_mr_moment'] = rpars['remanence_mr_moment']
            RemRec['remanence_bcr'] = rpars['remanence_bcr']
            RemRec['magic_experiment_names'] = irm_exp
            if rpars["magic_method_codes"] not in meths:
                meths.append(rpars["magic_method_codes"])
            methods = ""
            for meth in rmeths:
                methods = methods+meth.strip()+":"
            RemRec["magic_method_codes"] = methods[:-1]
            RemRec["er_citation_names"] = "This study"
            RemRecs.append(RemRec)
        else:
            if irm_init:
                pmagplotlib.clearFIG(HDD['irm'])
        if len(Bimag) > 0:
            if verbose:
                print('plotting initial magnetization curve')
# first normalize by Ms
            Mnorm = []
            for m in Mimag:
                Mnorm.append(m / float(hpars['hysteresis_ms_moment']))
            if imag_init == 0:
                HDD['imag'] = 4
                pmagplotlib.plot_init(HDD['imag'], 5, 5)
                imag_init = 1
            pmagplotlib.plot_imag(HDD['imag'], Bimag, Mnorm, imag_exp)
        else:
            if imag_init:
                pmagplotlib.clearFIG(HDD['imag'])
    #
        files = {}
        if plots:
            if pltspec != "":
                s = pltspec
            files = {}
            for key in list(HDD.keys()):
                files[key] = locname+'_'+s+'_'+key+'.'+fmt
            pmagplotlib.save_plots(HDD, files)
            if pltspec != "":
                sys.exit()
        if verbose and PLT:
            pmagplotlib.draw_figs(HDD)
            ans = input(
                "S[a]ve plots, [s]pecimen name, [q]uit, <return> to continue\n ")
            if ans == "a":
                files = {}
                for key in list(HDD.keys()):
                    files[key] = locname+'_'+s+'_'+key+'.'+fmt
                pmagplotlib.save_plots(HDD, files)
            if ans == '':
                k += 1
            if ans == "p":
                del HystRecs[-1]
                k -= 1
            if ans == 'q':
                print("Good bye")
                sys.exit()
            if ans == 's':
                keepon = 1
                specimen = input(
                    'Enter desired specimen name (or first part there of): ')
                while keepon == 1:
                    try:
                        k = sids.index(specimen)
                        keepon = 0
                    except:
                        tmplist = []
                        for qq in range(len(sids)):
                            if specimen in sids[qq]:
                                tmplist.append(sids[qq])
                        print(specimen, " not found, but this was: ")
                        print(tmplist)
                        specimen = input('Select one or try again\n ')
                        k = sids.index(specimen)
        else:
            k += 1
        if len(B) == 0 and len(Bdcd) == 0:
            if verbose:
                print('skipping this one - no hysteresis data')
            k += 1
    if rmag_out == "" and ans == 's' and verbose:
        really = input(
            " Do you want to overwrite the existing rmag_hystersis.txt file? 1/[0] ")
        if really == "":
            print('i thought not - goodbye')
            sys.exit()
        rmag_out = "rmag_hysteresis.txt"
    if len(HystRecs) > 0:
        pmag.magic_write(rmag_out, HystRecs, "rmag_hysteresis")
        if verbose:
            print("hysteresis parameters saved in ", rmag_out)
    if len(RemRecs) > 0:
        pmag.magic_write(rmag_rem, RemRecs, "rmag_remanence")
        if verbose:
            print("remanence parameters saved in ", rmag_rem)
NAME
        hysteresis_magic.py

    DESCRIPTION
        calculates hystereis parameters and saves them in rmag_hystereis format file
        makes plots if option selected

    SYNTAX
        hysteresis_magic.py [command line options]

    OPTIONS
        -h prints help message and quits
        -usr USER:   identify user, default is ""
        -f: specify input file, default is agm_measurements.txt
        -fh: specify rmag_hysteresis.txt input file
        -F: specify output file, default is rmag_hysteresis.txt
        -P: do not make the plots
        -spc SPEC: specify specimen name to plot and quit
        -sav save all plots and quit
        -fmt [png,svg,eps,jpg]