# (C) Copyright 2005-2022 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
import unittest

from numpy import array, ones

from kiva import agg

from .test_utils import Utils


class RgbaTestCase(unittest.TestCase, Utils):
    def test_init(self):
        agg.Rgba()

    def test_init1(self):
        m = agg.Rgba(0.5, 0.5, 0.5)
        desired = array((0.5, 0.5, 0.5, 1.0))
        self.assertRavelEqual(m.asarray(), desired)

    def test_init_from_array1(self):
        a = ones(3, "d") * 0.8
        m = agg.Rgba(a)
        desired = ones(4, "d") * 0.8
        desired[3] = 1.0
        result = m.asarray()
        self.assertRavelEqual(result, desired)

    def test_init_from_array2(self):
        a = ones(4, "d") * 0.8
        m = agg.Rgba(a)
        desired = ones(4, "d") * 0.8
        result = m.asarray()
        self.assertRavelEqual(result, desired)

    def test_init_from_array3(self):
        a = ones(5, "d")
        try:
            agg.Rgba(a)
        except ValueError:
            pass  # can't init from array that isn't 6 element.

    def test_init_from_array4(self):
        a = ones((2, 3), "d")
        try:
            agg.Rgba(a)
        except ValueError:
            pass  # can't init from array that isn't 1d.

    def test_gradient(self):
        first = agg.Rgba(0.0, 0.0, 0.0, 0.0)
        second = agg.Rgba(1.0, 1.0, 1.0, 1.0)
        actual = first.gradient(second, 0.5).asarray()
        desired = array((0.5, 0.5, 0.5, 0.5))
        self.assertRavelEqual(actual, desired)

    def test_pre(self):
        first = agg.Rgba(1.0, 1.0, 1.0, 0.5)
        actual = first.premultiply().asarray()
        desired = array((0.5, 0.5, 0.5, 0.5))
        self.assertRavelEqual(actual, desired)