"""Compare V9 vs V10 calculation methods."""
import sys
from pathlib import Path
sys.path.insert(0, str(Path(__file__).parent.parent))

from optimization_engine.extractors import ZernikeExtractor

op2 = Path('studies/M1_Mirror/m1_mirror_cost_reduction_V10/2_iterations/iter1/assy_m1_assyfem1_sim1-solution_1.op2')
extractor = ZernikeExtractor(op2, n_modes=50, filter_orders=4)

print("="*70)
print("CRITICAL: V9 vs V10 Calculation Method Comparison")
print("="*70)
print()

# This is what V9 does - computes relative WFE THEN fits Zernike
rel_40 = extractor.extract_relative('3', '2')
rel_60 = extractor.extract_relative('4', '2')
rel_90 = extractor.extract_relative('1', '2')

print('V9 method (ZernikeExtractor.extract_relative):')
print('  Computes WFE_diff = WFE_target - WFE_ref node-by-node')
print('  Then fits Zernike to WFE_diff')
print()
print(f'  40-20: {rel_40["relative_filtered_rms_nm"]:.2f} nm')
print(f'  60-20: {rel_60["relative_filtered_rms_nm"]:.2f} nm')
print(f'  90-20 (j1to3): {rel_90["relative_rms_filter_j1to3"]:.2f} nm')

# Individual absolute values
r20 = extractor.extract_subcase('2')
r40 = extractor.extract_subcase('3')
r60 = extractor.extract_subcase('4')
r90 = extractor.extract_subcase('1')

print()
print('='*70)
print('Individual absolute RMS values:')
print('='*70)
print(f'  20 deg: {r20["filtered_rms_nm"]:.2f} nm')
print(f'  40 deg: {r40["filtered_rms_nm"]:.2f} nm')
print(f'  60 deg: {r60["filtered_rms_nm"]:.2f} nm')
print(f'  90 deg: {r90["filtered_rms_nm"]:.2f} nm')

print()
print('='*70)
print('V10 method (WRONG - difference of RMS values):')
print('  Computes RMS_target - RMS_ref')
print('  This is NOT the same as RMS of the difference!')
print('='*70)
print()
print(f'  40-20: {r40["filtered_rms_nm"] - r20["filtered_rms_nm"]:.2f} nm')
print(f'  60-20: {r60["filtered_rms_nm"] - r20["filtered_rms_nm"]:.2f} nm')
print(f'  After abs(): {abs(r40["filtered_rms_nm"] - r20["filtered_rms_nm"]):.2f} nm')
print(f'  After abs(): {abs(r60["filtered_rms_nm"] - r20["filtered_rms_nm"]):.2f} nm')

print()
print('='*70)
print('CONCLUSION')
print('='*70)
print()
print('V10 BUG: Computes abs(RMS_target - RMS_ref) instead of RMS(WFE_target - WFE_ref)')
print()
print('The CORRECT relative WFE (from V9 method):')
print(f'  40-20: {rel_40["relative_filtered_rms_nm"]:.2f} nm')
print(f'  60-20: {rel_60["relative_filtered_rms_nm"]:.2f} nm')
print(f'  90-20: {rel_90["relative_rms_filter_j1to3"]:.2f} nm')
print()
print('The WRONG values V10 reports:')
print(f'  40-20: {abs(r40["filtered_rms_nm"] - r20["filtered_rms_nm"]):.2f} nm')
print(f'  60-20: {abs(r60["filtered_rms_nm"] - r20["filtered_rms_nm"]):.2f} nm')
print()
print('V10 values are ~3-4x LOWER than correct values!')