"""Test of geometry module.

:Date: 2019-12-21

.. module:: test_geometry
  :platform: *nix, Windows
  :synopsis: Test of geometry module.

.. moduleauthor:: Daniel Weschke <daniel.weschke@directbox.de>
"""
import unittest

import os
import sys
import math
sys.path.insert(0, os.path.abspath('..'))
from pylib.geometry import Direction, Point, CS, Wireframe, Line, Polygon, Circle

class TestGeometry(unittest.TestCase):

  def test_Direction(self):
    p = Direction()
    self.assertIsInstance(
        p,
        list)
    self.assertEqual(
        p,
        [1, 0, 0, 0])
    self.assertEqual(
        Direction(2, 3, 4),
        [2, 3, 4, 0])

  def test_Direction_getitem(self):
    self.assertEqual(
        Direction()[:3],
        [1, 0, 0])
    self.assertEqual(
        Direction(1, -1, 1)[:3],
        [1, -1, 1])

  def test_Point(self):
    p = Point()
    self.assertIsInstance(
        p,
        list)
    self.assertEqual(
        p,
        [0, 0, 0, 1])
    self.assertEqual(
        Point(2, 3, 4),
        [2, 3, 4, 1])

  def test_Point_getitem(self):
    self.assertEqual(
        Point()[:3],
        [0, 0, 0])
    self.assertEqual(
        Point(1, -1, 1)[:3],
        [1, -1, 1])

  def test_Point_rotate(self):
    [self.assertAlmostEqual(i, j) for i, j in
     zip(Point(1, 1, 1).rotate_x(math.pi/4), [1, 0, 1.414213562373095, 1])]

  def test_CS(self):
    self.assertEqual(
        CS(),
        [[1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]])

  def test_CS_rotate(self):
    [self.assertAlmostEqual(k, l) for i, j in
     zip(CS().rotate_y(-math.pi/2),
         [[0, 0.0, -1.0, 0.0], [0, 1, 0, 0], [1.0, 0.0, 0, 0.0], [0, 0, 0, 1]])
     for k, l in zip(i, j)]

  def test_Wireframe(self):
    self.assertEqual(
        Wireframe().points(),
        [])

    # it is possible to assign other objects then Points but/and the
    # class will not test if Points are used, this is just assumed
    self.assertEqual(
        Wireframe([]).points(),
        [[]])

    self.assertEqual(
        Wireframe(Point()).points(),
        [[0, 0, 0, 1]])

  def test_Line(self):
    self.assertEqual(
        Line().points(),
        [[-1, 0, 0, 1], [1, 0, 0, 1]])

  def test_Polygon(self):
    p0 = Point()
    p1 = Point(1, 0, 0)
    p2 = Point(1, 1, 1)
    p3 = Point(0, 1, 1)
    pg = Polygon(p0, p1, p2, p3)
    self.assertEqual(
        pg.points(),
        [[0, 0, 0, 1], [1, 0 , 0, 1], [1, 1, 1, 1], [0, 1, 1, 1], [0, 0, 0, 1]])

  def test_Polygon_rotate(self):
    pg = Polygon(Point(1, 1, 1)).rotate_x(math.pi/4)
    [self.assertAlmostEqual(i, j) for i, j in
     zip(pg.points()[0], [1, 0, 1.414213562373095, 1])]
    [self.assertAlmostEqual(k, l) for i, j in
     zip(pg.xyz(), ((1, 1), (0, 0), (1.414213562373095, 1.414213562373095)))
     for k, l in zip(i, j)]

  def test_Polygon_ch_cs(self):
    # example object to rotate
    p0 = Point()
    p1 = Point(1, 0, 0)
    p2 = Point(1, 1, 1)
    p3 = Point(0, 1, 1)
    theta = math.pi/2
    test = [[0.0, 0.0, 0.0, 1], [0, 0.0, -1.0, 1], [1.0, 1.0, -1, 1],
            [1.0, 1.0, 0, 1], [0.0, 0.0, 0.0, 1]]

    # using a coordinate system object
    pg = Polygon(p0, p1, p2, p3)
    cs = CS().rotate_y(theta)
    pg.ch_cs(cs)
    [self.assertAlmostEqual(i, j) for i, j in zip(pg.points(), test)]

  def test_Circle(self):
    cs = Circle(n=4).points()
    test = [[1, 0, 0, 1], [0, 1, 0, 1], [-1, 0, 0, 1], [0, -1, 0 ,1], [1, 0, 0, 1]]
    [self.assertAlmostEqual(i, j) for i, j in zip(cs, test)]

    cs = Circle().points()
    test = [[1.0, 0.0, 0, 1],
            [0.8090169943749475, 0.5877852522924731, 0, 1],
            [0.30901699437494745, 0.9510565162951535, 0, 1],
            [-0.30901699437494734, 0.9510565162951536, 0, 1],
            [-0.8090169943749473, 0.5877852522924732, 0, 1],
            [-1.0, 1.2246467991473532e-16, 0, 1],
            [-0.8090169943749476, -0.587785252292473, 0, 1],
            [-0.30901699437494756, -0.9510565162951535, 0, 1],
            [0.30901699437494723, -0.9510565162951536, 0, 1],
            [0.8090169943749473, -0.5877852522924734, 0, 1]]
    [self.assertAlmostEqual(k, l) for i, j in zip(cs, test) for k, l in zip(i, j) ]

if __name__ == '__main__':
  unittest.main(verbosity=2)