# Execute with FEMM5 native embeddedMicroPython from this extracted folder.
import os
def _exists(p):
    try:os.stat(p);return True
    except OSError:return False
if _exists('files/reproduce.py'):os.chdir('files')
elif '__file__' in globals() and '/' in __file__.replace('\\','/'):os.chdir(__file__.replace('\\','/').rsplit('/',1)[0])
import json,os,sys,time,math,cmath
import numpy as np
CONFIG={'output': 'native-demagnetization-native-result.json', 'directories': {'practice-ii07-4': '.'}, 'models': {'./practice-ii07-4-source-model.fem': {'problem': 'planar', 'depth': 80.0, 'angle': 25.0, 'circuits': ['Фаза А', 'Фаза В', 'Фаза С']}, './N35SH-150C-magmesh-0.4-source-model.fem': {'problem': 'planar', 'depth': 80.0, 'angle': 25.0, 'circuits': ['Фаза А', 'Фаза В', 'Фаза С']}, './N35SH-150C-magmesh-0.8-source-model.fem': {'problem': 'planar', 'depth': 80.0, 'angle': 25.0, 'circuits': ['Фаза А', 'Фаза В', 'Фаза С']}, './N35SH-20C-magmesh-0.4-source-model.fem': {'problem': 'planar', 'depth': 80.0, 'angle': 25.0, 'circuits': ['Фаза А', 'Фаза В', 'Фаза С']}, './N35SH-20C-magmesh-0.8-source-model.fem': {'problem': 'planar', 'depth': 80.0, 'angle': 25.0, 'circuits': ['Фаза А', 'Фаза В', 'Фаза С']}}}
DATA={'runtime':sys.version,'implementation':str(sys.implementation),'experiments':{},'field_solutions':0}
assert sys.implementation.name=='micropython'
def save():
    with open(CONFIG['output'],'w') as f:json.dump(DATA,f)
def serial(v):
    if isinstance(v,complex):return [v.real,v.imag]
    if isinstance(v,(tuple,list)):return [serial(x) for x in v]
    if isinstance(v,dict):return {k:serial(x) for k,x in v.items()}
    return v
def close():
    for n in ('mo_close','mi_close'):
        try:globals()[n]()
        except Exception:pass
def start(name):
    close();d=CONFIG['directories'][name];os.chdir(d);return d
def model(name):return './'+name+'-source-model.fem'
def solve(path,tag,currents=None,frequency=None,rotate=0,group=2,mesh=None,material=None):
    close();opendocument(path);mi_saveas(os.getcwd()+'/'+tag+'.fem')
    if frequency is not None:
        info=CONFIG['models'][path]
        mi_probdef(frequency,'millimeters',info['problem'],1e-8,info['depth'],info['angle'])
    if rotate:
        mi_selectgroup(group);mi_moverotate(0,0,rotate);mi_clearselected()
    if material:
        x,y,material_name=material;mi_selectlabel(x,y);mi_setblockprop(material_name,0,1,'',0,0,0);mi_clearselected()
    if mesh:
        for x,y,mat,sz,circ,mag,g,turns in mesh:
            mi_selectlabel(x,y);mi_setblockprop(mat,0,sz,circ,mag,g,turns);mi_clearselected()
    if currents:
        for name,value in currents:mi_modifycircprop(name,1,value)
    mi_analyze(1);mi_loadsolution();DATA['field_solutions']+=1
    info={'file':os.getcwd()+'/'+tag+'.fem','nodes':mo_numnodes(),'elements':mo_numelements(),'circuits':{}}
    for name in CONFIG['models'][path]['circuits']:
        info['circuits'][name]=list(mo_getcircuitproperties(name))
    mo_clearblock();mo_groupselectblock();info['energy_J']=mo_blockintegral(2);info['coenergy_J']=mo_blockintegral(17)
    info['loss_magnetic_W']=mo_blockintegral(3);info['loss_resistive_W']=mo_blockintegral(4);info['loss_total_W']=mo_blockintegral(6)
    mo_clearblock()
    try:
        mo_groupselectblock(group);info['torque_Nm']=mo_blockintegral(22);info['force_x_N']=mo_blockintegral(18);info['force_y_N']=mo_blockintegral(19);mo_clearblock()
    except Exception as error:info['force_error']=str(error)
    return info
def real(x):return complex(x).real
def add(name,value):DATA['experiments'][name]=serial(value);save()
def z_matrix(path,prefix,names):
    columns=[];evidence=[]
    for j in range(len(names)):
        row=solve(path,prefix+'-basis-'+str(j),[(n,1 if j==k else 0) for k,n in enumerate(names)])
        columns.append([complex(row['circuits'][n][1]) for n in names]);evidence.append(row)
    return [[columns[j][i] for j in range(len(names))] for i in range(len(names))],evidence
def linear_load(path,prefix,names,Z,rloads,rprimary,source,neutral=False):
    n=len(names);m=n+1 if neutral else n
    matrix=[[0j for j in range(m)] for i in range(m)]
    rhs=[0j]*m
    for i in range(n):
        for j in range(n):matrix[i][j]=Z[i][j]
        if i<n//2:matrix[i][i]+=rprimary;rhs[i]=source[i]
        else:
            matrix[i][i]+=rloads[i-n//2]
            if neutral:matrix[i][n]=1
    if neutral:
        for j in range(n//2,n):matrix[n][j]=1
    answer=np.linalg.solve(np.array(matrix),np.array(rhs));currents=[complex(answer[j]) for j in range(n)]
    row=solve(path,prefix,[(n,currents[j]) for j,n in enumerate(names)])
    voltages=[complex(row['circuits'][n][1]) for n in names]
    residual=[]
    for i in range(n):
        r=voltages[i]+(rprimary if i<n//2 else rloads[i-n//2])*currents[i]-(source[i] if i<n//2 else 0)
        if neutral and i>=n//2:r+=complex(answer[n])
        residual.append(r)
    row['current_A']=currents;row['voltage_V']=voltages;row['residual_V']=residual
    row['source_power_W']=sum(real(source[i]*currents[i].conjugate())/2 for i in range(n//2))
    row['external_primary_copper_W']=sum(rprimary*abs(currents[i])**2/2 for i in range(n//2))
    row['load_power_W']=sum(rloads[i-n//2]*abs(currents[i])**2/2 for i in range(n//2,n))
    row['neutral_current_A']=-sum(currents[n//2:]);row['neutral_potential_V']=complex(answer[n]) if neutral else 0
    row['power_balance_W']=row['source_power_W']-row['external_primary_copper_W']-row['load_power_W']-real(row['loss_total_W'])
    return row

try:
    name='practice-ii07-4';start(name)
    with open(CONFIG['directories'][name]+'/materialized-models.json') as f:models=json.load(f)
    rows=[];DATA['experiments']['N35SH_demagnetization']={'rows':rows,'status':'running','material_source':models,'region_of_interest':'Magnet interior r48.25..56.75mm, angular distance at least0.5deg from a pole edge; no claim about singular edges or irreversible hysteresis.'}
    for spec in models['models']:
        path=spec['path'].replace('\\','/');names=CONFIG['models'][path]['circuits'];mu=spec['mu_recoil_relative'];Br=spec['Br_T'];T=spec['temperature_C']
        for regime,id_,iq in [('nominal',0.,5.),('demagnetizing',-30.,0.)]:
            currents=[(n,id_*math.cos(math.radians(90-120*j))-iq*math.sin(math.radians(90-120*j))) for j,n in enumerate(names)]
            tag='N35SH-'+str(T)+'-'+str(spec['magnet_mesh_mm'])+'-'+regime;r=solve(path,tag,currents);r['regime']=regime;r['I_d_A']=id_;r['I_q_A']=iq;r['temperature_C']=T;r['magnet_mesh_mm']=spec['magnet_mesh_mm'];r['Br_T']=Br;r['mu_recoil_relative']=mu;r['Hk90_A_m']=spec['Hk90_A_m'];r['digitization_allowance_A_m']=20000.;r['maps_first_pole']=[];extrema=[]
            for pole in range(4):
                minimum=1e99;maximum=-1e99;minimum_point=None;sign=1 if pole%2==0 else -1
                for ir in range(35):
                    radius=48.25+.25*ir
                    for ia in range(159):
                        theta=math.radians(pole*90-39.5+.5*ia);co,si=math.cos(theta),math.sin(theta);x,y=radius*co,radius*si;values=mo_getpointvalues(x,y);bx,by=real(values[1]),real(values[2]);m_x,m_y=sign*co,sign*si;Hparallel=(bx*m_x+by*m_y-Br)/(4*math.pi*1e-7*mu);Hraw=real(values[5])*m_x+real(values[6])*m_y
                        if Hparallel<minimum:minimum=Hparallel;minimum_point=[x,y]
                        maximum=max(maximum,Hparallel)
                        if pole==0:r['maps_first_pole'].append({'x_mm':x,'y_mm':y,'radius_mm':radius,'angle_deg':math.degrees(theta),'B_x_T':bx,'B_y_T':by,'H_parallel_corrected_A_m':Hparallel,'H_parallel_native_raw_A_m':Hraw})
                extrema.append({'pole':pole,'Hparallel_min_A_m':minimum,'Hparallel_max_A_m':maximum,'minimum_point_mm':minimum_point,'margin_against_Hk90_A_m':minimum-spec['Hk90_A_m'],'conservative_digitization_margin_A_m':minimum-(spec['Hk90_A_m']+20000),'classification':'above chosenJ90curve with20kA/mgraph allowance' if minimum>spec['Hk90_A_m']+20000 else 'beyond_or_uncertain: linearrecoil modelcannotpredictirreversibleloss'})
            r['all_four_pole_extrema']=extrema;rows.append(serial(r));save()
    DATA['experiments']['N35SH_demagnetization']['status']='complete'
except Exception as error:
    DATA['fatal_error']=str(error);DATA['fatal_error_type']=type(error).__name__;save()
finally:close()
save()
print('NATIVE_DEMAGNETIZATION_SOLUTIONS',DATA['field_solutions'])