"""
Sphere: Coupling vs diameter
============================

"""
import numpy
from PyMieSim import (
    Measure,
    ureg,
    CoherentModeSet,
    SphereSet,
    GaussianSet,
    PolarizationSet,
    Experiment,
)



polarization_set = PolarizationSet(
    angles=[90.0] * ureg.degree,
)

source = GaussianSet(
    wavelength=[700] * ureg.nanometer,
    polarization=polarization_set,
    optical_power=[1e-3] * ureg.watt,
    numerical_aperture=[0.1],
)

scatterer = SphereSet(
    diameter=numpy.linspace(100, 10000, 600) * ureg.nanometer,
    material=[1.5],
    medium=[1.0],
)

detector = CoherentModeSet(
    mode_number=["LP01", "LP11", "LP02"],
    numerical_aperture=[0.2],
    rotation=[0] * ureg.degree,
    phi_offset=[0.0] * ureg.degree,
    gamma_offset=[0.0] * ureg.degree,
    sampling=[600],
    mean_coupling=True,
)

experiment = Experiment(scatterer_set=scatterer, source_set=source, detector_set=detector)

result = experiment.get(Measure.COUPLING, drop_unique_level=True)

print("Result dimensions and shape:", result.dims, result.shape)
print("Measure units:", result.attrs["units"])

result.plot(x="scatterer:diameter")