#!/usr/bin/env python
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from __future__ import (absolute_import, division, print_function,
                        unicode_literals)

import numpy as np
import matplotlib.pyplot as plt
from tike.tomo import *

__author__ = "Daniel Ching"
__copyright__ = "Copyright (c) 2016, UChicago Argonne, LLC."
__docformat__ = 'restructuredtext en'


def test_forward_project_hv_quadrants1():
    gmin = [0, 0, 0]
    obj = np.zeros((2, 3, 2))
    obj[0, 1, 0] = 1
    theta, h, v = [0, 0, 0, 0], [0, 1, 0, 1], [0, 0, 1, 1]
    pgrid = np.ones((1, 1))
    integral = forward(obj, gmin,
                       pgrid, theta, h, v)
    truth = np.array([1, 0, 0, 0]).reshape(4, 1, 1)
    np.testing.assert_equal(truth, integral)


def test_forward_project_hv_quadrants2():
    gsize = np.array([3, 2, 2])
    gmin = -gsize / 2.0
    obj = np.zeros((3, 2, 2))
    obj[2, 0, 1] = 1
    theta, h, v = [0, 0], [-1, 0], [0.5, 0.5]
    pgrid = np.ones((1, 1))
    integral = forward(obj, gmin,
                       pgrid, theta, h, v)
    truth = np.array([0, 1]).reshape(2, 1, 1)
    np.testing.assert_equal(truth, integral)


def test_forward_project_hv_quadrants4():
    gsize = np.array([1, 2, 2])
    gmin = -gsize / 2.0
    obj = np.zeros((1, 2, 2))
    obj[0, :, 1] = 1
    theta, h, v = [0], [-0.5], [-0.5]
    pgrid = np.ones((1, 1))
    psize = (1, 1)
    integral = forward(obj, gmin,
                       pgrid, theta, h, v)
    truth = np.array([2]).reshape(1, 1, 1)
    np.testing.assert_equal(truth, integral)
