# -*- coding: utf-8 -*-
# emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: nil -*-
# vi: set ft=python sts=4 ts=4 sw=4 et:
import numpy as np

import numpy.testing as npt
from .. import rapidart as ra
from ...interfaces.base import Bunch


def test_ad_init():
    ad = ra.ArtifactDetect(use_differences=[True, False])
    assert ad.inputs.use_differences[0]
    assert not ad.inputs.use_differences[1]


def test_ad_output_filenames():
    ad = ra.ArtifactDetect()
    outputdir = "/tmp"
    f = "motion.nii"
    (
        outlierfile,
        intensityfile,
        statsfile,
        normfile,
        plotfile,
        displacementfile,
        maskfile,
    ) = ad._get_output_filenames(f, outputdir)
    assert outlierfile == "/tmp/art.motion_outliers.txt"
    assert intensityfile == "/tmp/global_intensity.motion.txt"
    assert statsfile == "/tmp/stats.motion.txt"
    assert normfile == "/tmp/norm.motion.txt"
    assert plotfile == "/tmp/plot.motion.png"
    assert displacementfile == "/tmp/disp.motion.nii"
    assert maskfile == "/tmp/mask.motion.nii"


def test_ad_get_affine_matrix():
    matrix = ra._get_affine_matrix(np.array([0]), "SPM")
    npt.assert_equal(matrix, np.eye(4))
    # test translation
    params = [1, 2, 3]
    matrix = ra._get_affine_matrix(params, "SPM")
    out = np.eye(4)
    out[0:3, 3] = params
    npt.assert_equal(matrix, out)
    # test rotation
    params = np.array([0, 0, 0, np.pi / 2, np.pi / 2, np.pi / 2])
    matrix = ra._get_affine_matrix(params, "SPM")
    out = np.array([0, 0, 1, 0, 0, -1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1]).reshape((4, 4))
    npt.assert_almost_equal(matrix, out)
    # test scaling
    params = np.array([0, 0, 0, 0, 0, 0, 1, 2, 3])
    matrix = ra._get_affine_matrix(params, "SPM")
    out = np.array([1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 3, 0, 0, 0, 0, 1]).reshape((4, 4))
    npt.assert_equal(matrix, out)
    # test shear
    params = np.array([0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 3])
    matrix = ra._get_affine_matrix(params, "SPM")
    out = np.array([1, 1, 2, 0, 0, 1, 3, 0, 0, 0, 1, 0, 0, 0, 0, 1]).reshape((4, 4))
    npt.assert_equal(matrix, out)


def test_ad_get_norm():
    params = np.array(
        [
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            0,
            np.pi / 4,
            np.pi / 4,
            np.pi / 4,
            0,
            0,
            0,
            -np.pi / 4,
            -np.pi / 4,
            -np.pi / 4,
        ]
    ).reshape((3, 6))
    norm, _ = ra._calc_norm(params, False, "SPM")
    npt.assert_almost_equal(norm, np.array([18.86436316, 37.74610158, 31.29780829]))
    norm, _ = ra._calc_norm(params, True, "SPM")
    npt.assert_almost_equal(norm, np.array([0.0, 143.72192614, 173.92527131]))


def test_sc_init():
    sc = ra.StimulusCorrelation(concatenated_design=True)
    assert sc.inputs.concatenated_design


def test_sc_populate_inputs():
    sc = ra.StimulusCorrelation()
    inputs = Bunch(
        realignment_parameters=None,
        intensity_values=None,
        spm_mat_file=None,
        concatenated_design=None,
    )
    assert set(sc.inputs.__dict__.keys()) == set(inputs.__dict__.keys())


def test_sc_output_filenames():
    sc = ra.StimulusCorrelation()
    outputdir = "/tmp"
    f = "motion.nii"
    corrfile = sc._get_output_filenames(f, outputdir)
    assert corrfile == "/tmp/qa.motion_stimcorr.txt"