import unittest

import gudhi

class TestAlphaComplex(unittest.TestCase):

  def test_infinite_alpha(self):
    point_list=[[0,0],[1,0],[0,1],[1,1]]
    alpha_complex = gudhi.AlphaComplex(points=point_list)

    self.assertEqual(alpha_complex.num_simplices(), 11)
    self.assertEqual(alpha_complex.num_vertices(), 4)

    self.assertEqual(alpha_complex.get_filtered_tree(), [([0], 0.0), ([1], 0.0), ([2], 0.0), ([3], 0.0), ([0, 1], 0.25), ([0, 2], 0.25), ([1, 3], 0.25), ([2, 3], 0.25), ([1, 2], 0.5), ([0, 1, 2], 0.5), ([1, 2, 3], 0.5)])
    self.assertEqual(alpha_complex.get_star_tree([0]), [([0], 0.0), ([0, 1], 0.25), ([0, 1, 2], 0.5), ([0, 2], 0.25)])
    self.assertEqual(alpha_complex.get_coface_tree([0], 1), [([0, 1], 0.25), ([0, 2], 0.25)])

    self.assertEqual(point_list[0], alpha_complex.get_point(0))
    self.assertEqual(point_list[1], alpha_complex.get_point(1))
    self.assertEqual(point_list[2], alpha_complex.get_point(2))
    self.assertEqual(point_list[3], alpha_complex.get_point(3))
    self.assertEqual([], alpha_complex.get_point(4))
    self.assertEqual([], alpha_complex.get_point(125))

  def test_filtered_alpha(self):
    point_list=[[0,0],[1,0],[0,1],[1,1]]
    filtered_alpha = gudhi.AlphaComplex(points=point_list,max_alpha_square=0.25)

    self.assertEqual(filtered_alpha.num_simplices(), 8)
    self.assertEqual(filtered_alpha.num_vertices(), 4)

    self.assertEqual(point_list[0], filtered_alpha.get_point(0))
    self.assertEqual(point_list[1], filtered_alpha.get_point(1))
    self.assertEqual(point_list[2], filtered_alpha.get_point(2))
    self.assertEqual(point_list[3], filtered_alpha.get_point(3))
    self.assertEqual([], filtered_alpha.get_point(4))
    self.assertEqual([], filtered_alpha.get_point(125))

    self.assertEqual(filtered_alpha.get_filtered_tree(), [([0], 0.0), ([1], 0.0), ([2], 0.0), ([3], 0.0), ([0, 1], 0.25), ([0, 2], 0.25), ([1, 3], 0.25), ([2, 3], 0.25)])
    self.assertEqual(filtered_alpha.get_star_tree([0]), [([0], 0.0), ([0, 1], 0.25), ([0, 2], 0.25)])
    self.assertEqual(filtered_alpha.get_coface_tree([0], 1), [([0, 1], 0.25), ([0, 2], 0.25)])

if __name__ == '__main__':
    unittest.main()