import gudhi

""" This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
    See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
    Author(s):       Vincent Rouvreau

    Copyright (C) 2016 Inria

    Modification(s):
      - YYYY/MM Author: Description of the modification
"""

__author__ = "Vincent Rouvreau"
__copyright__ = "Copyright (C) 2016 Inria"
__license__ = "MIT"


def test_empty_euclidean_witness_complex():
    euclidean_witness = gudhi.EuclideanWitnessComplex()
    assert euclidean_witness.__is_defined() == False


def test_witness_complex():
    point_cloud = [
        [1.0, 1.0],
        [7.0, 0.0],
        [4.0, 6.0],
        [9.0, 6.0],
        [0.0, 14.0],
        [2.0, 19.0],
        [9.0, 17.0],
    ]
    landmarks = [[1.0, 1.0], [7.0, 0.0], [4.0, 6.0]]
    euclidean_witness_complex = gudhi.EuclideanWitnessComplex(
        landmarks=landmarks, witnesses=point_cloud
    )
    simplex_tree = euclidean_witness_complex.create_simplex_tree(max_alpha_square=4.1)

    assert landmarks[0] == euclidean_witness_complex.get_point(0)
    assert landmarks[1] == euclidean_witness_complex.get_point(1)
    assert landmarks[2] == euclidean_witness_complex.get_point(2)

    assert simplex_tree.get_filtration() == [
        ([0], 0.0),
        ([1], 0.0),
        ([0, 1], 0.0),
        ([2], 0.0),
        ([0, 2], 0.0),
        ([1, 2], 0.0),
        ([0, 1, 2], 0.0),
    ]


def test_empty_euclidean_strong_witness_complex():
    euclidean_strong_witness = gudhi.EuclideanStrongWitnessComplex()
    assert euclidean_strong_witness.__is_defined() == False


def test_strong_witness_complex():
    point_cloud = [
        [1.0, 1.0],
        [7.0, 0.0],
        [4.0, 6.0],
        [9.0, 6.0],
        [0.0, 14.0],
        [2.0, 19.0],
        [9.0, 17.0],
    ]
    landmarks = [[1.0, 1.0], [7.0, 0.0], [4.0, 6.0]]
    euclidean_strong_witness_complex = gudhi.EuclideanStrongWitnessComplex(
        landmarks=landmarks, witnesses=point_cloud
    )
    simplex_tree = euclidean_strong_witness_complex.create_simplex_tree(
        max_alpha_square=14.9
    )

    assert landmarks[0] == euclidean_strong_witness_complex.get_point(0)
    assert landmarks[1] == euclidean_strong_witness_complex.get_point(1)
    assert landmarks[2] == euclidean_strong_witness_complex.get_point(2)

    assert simplex_tree.get_filtration() == [([0], 0.0), ([1], 0.0), ([2], 0.0)]

    simplex_tree = euclidean_strong_witness_complex.create_simplex_tree(
        max_alpha_square=100.0
    )

    assert simplex_tree.get_filtration() == [
        ([0], 0.0),
        ([1], 0.0),
        ([2], 0.0),
        ([1, 2], 15.0),
        ([0, 2], 34.0),
        ([0, 1], 37.0),
        ([0, 1, 2], 37.0),
    ]