#!/usr/bin/env python3
# -*- coding: UTF-8 -*-
#
#    Copyright (C) 2009-2015 Ovidio Peña Rodríguez <ovidio@bytesfall.com>
#    Copyright (C) 2013-2015  Konstantin Ladutenko <kostyfisik@gmail.com>
#
#    This file is part of python-scattnlay
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    The only additional remark is that we expect that all publications
#    describing work using this software, or all commercial products
#    using it, cite the following reference:
#    [1] O. Pena and U. Pal, "Scattering of electromagnetic radiation by
#        a multilayered sphere," Computer Physics Communications,
#        vol. 180, Nov. 2009, pp. 2348-2354.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

# This test case calculates the electric field in the
# E-k plane, for an spherical Ag nanoparticle.

from scattnlay import fieldnlay, scattnlay
from fieldplot import fieldplot

import numpy as np
import cmath

# # a)
# WL=400 #nm
# core_r = WL/20.0
# epsilon_Ag = -2.0 + 10.0j

# # b)
# WL=400 #nm
# core_r = WL/20.0
# epsilon_Ag = -2.0 + 1.0j

# c)
WL = 354  # nm
core_r = WL / 20.0
epsilon_Ag = -2.0 + 0.28j

# d)
# WL=367 #nm
# core_r = WL/20.0
# epsilon_Ag = -2.71 + 0.25j

# WL=500 #nm
# core_r = 615.0
# epsilon_Ag = 4.0


index_Ag = np.sqrt(epsilon_Ag)
# n1 = 1.53413
# n2 = 0.565838 + 7.23262j
nm = 1.0

x = 2.0 * np.pi * np.array([core_r / 4.0 * 3.0, core_r], dtype=np.float64) / WL

m = np.array((index_Ag, index_Ag), dtype=np.complex128) / nm

print("x =", x)
print("m =", m)

comment = 'bulk-WL' + str(WL) + 'nm_r' + str(core_r) + 'nm_epsilon' + str(epsilon_Ag) + '-flow'
WL_units = 'nm'
npts = 251
factor = 2.1
flow_total = 41
# flow_total = 21
# flow_total = 0
crossplane = 'XZ'
# crossplane='YZ'
# crossplane='XY'

# Options to plot: Eabs, Habs, Pabs, angleEx, angleHy
field_to_plot = 'Pabs'
# field_to_plot='angleEx'


import matplotlib.pyplot as plt

fig, axs = plt.subplots(1, 1)  # , sharey=True, sharex=True)
fig.tight_layout()
fieldplot(fig, axs, x, m, WL, comment, WL_units, crossplane, field_to_plot, npts, factor,
          flow_total, density=50.0, maxlength=40.0, arrowstyle='-',
          subplot_label=' ', draw_shell=True)

# fieldplot(x,m, WL, comment, WL_units, crossplane, field_to_plot, npts, factor, flow_total, is_flow_extend=False)

# for ax in axs:
#     ax.locator_params(axis='x',nbins=5)
#     ax.locator_params(axis='y',nbins=5)

fig.subplots_adjust(hspace=0.3, wspace=-0.1)

plt.savefig(comment + "-R" + str(int(round(x[-1] * WL / 2.0 / np.pi))) + "-" + crossplane + "-"
            + field_to_plot + ".pdf", pad_inches=0.02, bbox_inches='tight')

plt.draw()

#    plt.show()

plt.clf()
plt.close()