# -*- coding: utf-8 -*-
# ######### COPYRIGHT #########
# Credits
# #######
#
# Copyright(c) 2015-2025
# ----------------------
#
# * `LabEx Archimède <http://labex-archimede.univ-amu.fr/>`_
# * `Laboratoire d'Informatique Fondamentale <http://www.lif.univ-mrs.fr/>`_
#   (now `Laboratoire d'Informatique et Systèmes <http://www.lis-lab.fr/>`_)
# * `Institut de Mathématiques de Marseille <http://www.i2m.univ-amu.fr/>`_
# * `Université d'Aix-Marseille <http://www.univ-amu.fr/>`_
#
# This software is a port from LTFAT 2.1.0 :
# Copyright (C) 2005-2025 Peter L. Soendergaard <peter@sonderport.dk>.
#
# Contributors
# ------------
#
# * Denis Arrivault <contact.dev_AT_lis-lab.fr>
# * Florent Jaillet <contact.dev_AT_lis-lab.fr>
#
# Description
# -----------
#
# ltfatpy is a partial Python port of the
# `Large Time/Frequency Analysis Toolbox <http://ltfat.sourceforge.net/>`_,
# a MATLAB®/Octave toolbox for working with time-frequency analysis and
# synthesis.
#
# Version
# -------
#
# * ltfatpy version = 1.1.2
# * LTFAT version = 2.1.0
#
# Licence
# -------
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# ######### COPYRIGHT #########


"""Test of the gabdual function

.. moduleauthor:: Denis Arrivault
"""

from __future__ import print_function, division

import unittest
import numpy as np
# from math import *
# import matplotlib.pyplot as plt
# from fractions import gcd

from ltfatpy.gabor.gabdual import gabdual
from ltfatpy.tests.datasets.read_dgt_signal_ex_mat import DgtSignals
from ltfatpy.fourier.pgauss import pgauss
from ltfatpy.tests.datasets.get_dataset_path import get_dataset_path


class TestGabDual(unittest.TestCase):

    # Called before the tests.
    def setUp(self):
        self.filename = get_dataset_path('dgt_signal_ex.mat')

    # Called after the tests.
    def tearDown(self):
        print('Test done')

    def test_default(self):
        """ Comparing results with Matlab generated ones
        """
        pass
        dgs = DgtSignals(self.filename)
        (TYPE, PHASETYPE, L, W, a, M, gl, SIGNAL, WINDOW, DGT, DUAL_WINDOW,
         IDGT) = dgs.read_next_signal()
        while TYPE != '':
            mess = "\n\nTYPE = " + TYPE + "\nPHASETYPE = " + PHASETYPE
            mess += "\nL = " + str(L) + "\nW = " + str(W) + "\na = " + str(a)
            mess += "\nM = " + str(M) + "\ngl = " + str(gl) + "\nSIGNAL =\n"
            mess += str(SIGNAL) + "\nWINDOW =\n" + str(WINDOW)
            mess += "\nDGT\n" + str(DGT) + "\nDUAL_WINDOW\n"
            mess += str(DUAL_WINDOW) + "\nIDGT\n" + str(IDGT)
            gd = gabdual(WINDOW, a, M)
            # mess += "\ng_dual = \n" + str(gd)
            self.assertTrue(np.linalg.norm(gd-DUAL_WINDOW) <= 1e-10, mess)
            (TYPE, PHASETYPE, L, W, a, M, gl, SIGNAL, WINDOW, DGT, DUAL_WINDOW,
             IDGT) = dgs.read_next_signal()

    def test_properties(self):
        self.assertRaises(ValueError, gabdual, "Gauss", 13, 89, 89)
        a = 20
        M = 49
        gd = gabdual("Gauss", a, M)
        L = gd.shape[0]
        g = pgauss(L)[0]
        gdd = gabdual(gd, a, M, L)
        mess = "a = {0:d}, M = {1:d}, L = {2:d}".format(a, M, L)
        np.testing.assert_array_almost_equal(g, gdd, 10, mess)
        gd = gabdual(g.reshape(L//2, 2), a, M)
        self.assertEqual(gd.shape, (2, L))
        M = 10
        gd = gabdual("Gauss", a, M)
        self.assertEqual(gd.shape, (a,))

if __name__ == '__main__':
    suite = unittest.TestLoader().loadTestsFromTestCase(TestGabDual)
    unittest.TextTestRunner(verbosity=2).run(suite)