from __future__ import with_statement

import unittest

from numpy import all, allclose, array, dtype, pi, ones

from kiva import agg
from kiva.fonttools import Font


class GraphicsContextArrayTestCase(unittest.TestCase):

    def test_init(self):
        gc = agg.GraphicsContextArray((100,100))

    def test_init_bmp_equal_to_clear_bmp(self):
        gc = agg.GraphicsContextArray((5,5))
        gc2 = agg.GraphicsContextArray((5,5))
        gc2.clear()
        self.assert_((gc.bmp_array == gc2.bmp_array).all())

    def test_init_with_bmp_doesnt_clear(self):
        a = ones((5,5,4), dtype('uint8'))
        gc = agg.GraphicsContextArray(a, pix_format='rgba32')
        self.assert_((gc.bmp_array == a).all())

    def test_save_restore_state(self):
        gc = agg.GraphicsContextArray((100,100))
        gc.save_state()
        gc.restore_state()

    def test_save_restore_state_for_ctm(self):
        gc = agg.GraphicsContextArray((100,100))
        m0 = agg.translation_matrix(10.0,10.0)
        gc.set_ctm(m0)
        gc.save_state()
        m1 = agg.translation_matrix(5.0,5.0)
        gc.set_ctm(m1)
        m2 = gc.get_ctm()
        self.assertEqual(tuple(m1), m2)
        gc.restore_state()
        m3 = gc.get_ctm()
        self.assertEqual(tuple(m0), m3)
    # !! Need some tests of other graphics state information on
    # !! save/restore state

    def test_save_restore_state_for_ttm(self):
        # The interesting thing here is that we are verifying
        # that the text transform matrix (TTM) is *not* saved
        # with the graphics state.
        gc = agg.GraphicsContextArray((100,100))
        m0 = agg.translation_matrix(10.0,10.0)
        gc.set_text_matrix(m0)
        gc.save_state()
        gc.set_text_matrix(agg.translation_matrix(5.0,5.0))
        gc.restore_state()
        m1 = gc.get_text_matrix()
        self.assertNotEqual(m1, m0)
    # !! Need some tests of other graphics state information on
    # !! save/restore state

    def test_context_manager(self):
        gc = agg.GraphicsContextArray((100,100))

        # Set some values.
        gc.set_stroke_color((1,0,0,1))
        gc.set_antialias(0)
        gc.set_alpha(0.25)

        with gc:
            # Change the values in the current context.
            gc.set_stroke_color((0,0,1,1))
            self.assert_(all(gc.get_stroke_color() == (0,0,1,1)))
            gc.set_antialias(1)
            self.assertEqual(gc.get_antialias(), 1)
            gc.set_alpha(0.75)
            self.assertEqual(gc.get_alpha(), 0.75)

        # Verify that we are back to the previous settings.
        self.assert_(all(gc.get_stroke_color() == (1,0,0,1)))
        self.assertEqual(gc.get_antialias(), 0)
        self.assertEqual(gc.get_alpha(), 0.25)

    def test_context_manager_nested(self):
        gc = agg.GraphicsContextArray((100,100))

        # Set some values.
        gc.set_stroke_color((1,0,0,1))
        gc.set_antialias(0)
        gc.set_alpha(0.25)

        with gc:
            # Change the values in the current context.
            gc.set_stroke_color((0,0,1,1))
            self.assert_(all(gc.get_stroke_color() == (0,0,1,1)))
            gc.set_antialias(1)
            self.assertEqual(gc.get_antialias(), 1)
            gc.set_alpha(0.75)
            self.assertEqual(gc.get_alpha(), 0.75)

            with gc:
                # Change the values in the current context.
                gc.set_stroke_color((1,0,1,1))
                self.assert_(all(gc.get_stroke_color() == (1,0,1,1)))
                gc.set_antialias(0)
                self.assertEqual(gc.get_antialias(), 0)
                gc.set_alpha(1.0)
                self.assertEqual(gc.get_alpha(), 1.0)

            # Verify that we are back to the previous settings.
            self.assert_(all(gc.get_stroke_color() == (0,0,1,1)))
            self.assertEqual(gc.get_antialias(), 1)
            self.assertEqual(gc.get_alpha(), 0.75)

        # Verify that we are back to the previous settings.
        self.assert_(all(gc.get_stroke_color() == (1,0,0,1)))
        self.assertEqual(gc.get_antialias(), 0)
        self.assertEqual(gc.get_alpha(), 0.25)


    def test_translate_ctm(self):
        gc = agg.GraphicsContextArray((100, 100))
        gc.translate_ctm(2.0, 2.0)
        actual = gc.get_ctm()
        desired = agg.translation_matrix(2.0, 2.0)
        self.assertEqual(actual, tuple(desired))

    def test_scale_ctm(self):
        gc = agg.GraphicsContextArray((100,100))
        gc.scale_ctm(2.0,2.0)
        actual = gc.get_ctm()
        desired = agg.scaling_matrix(2.0,2.0)
        self.assertEqual(actual, tuple(desired))

    def test_rotate_ctm(self):
        gc = agg.GraphicsContextArray((100,100))
        gc.rotate_ctm(pi/4.)
        actual = gc.get_ctm()
        desired = agg.rotation_matrix(pi/4.)
        self.assertEqual(actual, tuple(desired))

    def test_concat_ctm(self):
        gc = agg.GraphicsContextArray((100,100))
        gc.translate_ctm(2.0,2.0)
        m0 = agg.scaling_matrix(2.0,2.0)
        gc.concat_ctm(m0)
        actual = gc.get_ctm()
        m0.multiply(agg.translation_matrix(2.0,2.0))
        desired = m0
        self.assertEqual(actual, tuple(desired))

    def test_begin_path(self):
        gc = agg.GraphicsContextArray((100,100))
        gc.move_to(1.0,1.0)
        gc.begin_path()
        path = gc._get_path()
        pt, flag = path._vertex()
        # !! should get this value from the agg enum value
        desired = 0
        self.assertEqual(flag, desired)

    def test_move_to(self):
        gc = agg.GraphicsContextArray((100, 100))
        gc.move_to(1.0, 1.0)
        path = gc._get_path()
        actual, flag = path._vertex()
        desired = array((1.0, 1.0))
        self.assert_(allclose(actual, desired))

    def test_move_to1(self):
        gc = agg.GraphicsContextArray((100, 100))
        gc.translate_ctm(1.0, 1.0)
        gc.move_to(1.0, 1.0)
        path = gc._get_path()
        actual, flag = path._vertex()
        desired = array((2.0, 2.0))
        self.assert_(allclose(actual, desired))

    def test_quad_curve_to(self):
        gc = agg.GraphicsContextArray((100, 100))
        ctrl = 1.0, 1.0
        to = 2.0, 2.0
        gc.quad_curve_to(ctrl[0], ctrl[1], to[0], to[1])
        path = gc._get_path()
        actual_ctrl, flag = path._vertex()
        self.assertEqual(actual_ctrl, ctrl)
        self.assertEqual(flag, 3)
        actual_to, flag = path._vertex()
        self.assertEqual(actual_to, to)
        self.assertEqual(flag, 3)

    def test_curve_to(self):
        gc = agg.GraphicsContextArray((100, 100))
        ctrl1 = 1.0, 1.0
        ctrl2 = 2.0, 2.0
        to = 3.0, 3.0
        gc.curve_to(ctrl1[0], ctrl1[1], ctrl2[0], ctrl2[1], to[0], to[1])

        path = gc._get_path()
        actual_ctrl1, flag = path._vertex()
        self.assertEqual(actual_ctrl1, ctrl1)
        self.assertEqual(flag, 4)
        actual_ctrl2, flag = path._vertex()
        self.assertEqual(actual_ctrl2, ctrl2)
        self.assertEqual(flag, 4)
        actual_to, flag = path._vertex()
        self.assertEqual(actual_to, to)
        self.assertEqual(flag, 4)

    def test_add_path(self):
        path1 = agg.CompiledPath()
        path1.move_to(1.0,1.0)
        path1.translate_ctm(1.0,1.0)
        path1.line_to(2.0,2.0) #actually (3.0,3.0)
        path1.scale_ctm(2.0,2.0)
        path1.line_to(2.0,2.0) # actually (5.0,5.0)

        gc = agg.GraphicsContextArray((100,100))
        gc.move_to(1.0,1.0)
        gc.translate_ctm(1.0,1.0)
        gc.line_to(2.0,2.0) #actually (3.0,3.0)

        sub_path = agg.CompiledPath()
        sub_path.scale_ctm(2.0,2.0)
        sub_path.line_to(2.0,2.0)
        gc.add_path(sub_path)

        path2 = gc._get_path()
        desired = path1._vertices()
        actual = path2._vertices()
        self.assert_(allclose(actual, desired))

        desired = path1.get_ctm()
        actual = path2.get_ctm()
        self.assertEqual(actual, desired)

    def base_lines(self, lines):
        gc = agg.GraphicsContextArray((100, 100))
        gc.move_to(1.0,1.0)
        gc.line_to(2.0,2.0) #actually (3.0,3.0)
        gc.lines(lines)
        actual = gc._get_path()._vertices()
        desired = array(((1.0,1.0,agg.path_cmd_move_to, agg.path_flags_none),
                         (2.0,2.0,agg.path_cmd_line_to, agg.path_flags_none),
                         (3.0,3.0,agg.path_cmd_move_to, agg.path_flags_none),
                         (4.0,4.0,agg.path_cmd_line_to, agg.path_flags_none),
                         (0.0,0.0,agg.path_cmd_stop, agg.path_flags_none),))
        #print 'desired:', desired
        #print 'actual:', actual

        self.assert_(allclose(actual,desired))

    def test_lines_array(self):
        lines = array(((3.0,3.0),
                       (4.0,4.0)))
        self.base_lines(lines)

    def test_lines_list(self):
        lines = [[3.0,3.0],
                 [4.0,4.0]]
        self.base_lines(lines)


    def base_rects(self,rects):
        gc = agg.GraphicsContextArray((100, 100))
        gc.rects(rects)
        actual = gc._get_path()._vertices()
        desired = array(((1.0,1.0,agg.path_cmd_move_to, agg.path_flags_none),
                         (1.0,2.0,agg.path_cmd_line_to, agg.path_flags_none),
                         (2.0,2.0,agg.path_cmd_line_to, agg.path_flags_none),
                         (2.0,1.0,agg.path_cmd_line_to, agg.path_flags_none),
                         (0.0,0.0,agg.path_cmd_end_poly, agg.path_flags_close),
                         (2.0,2.0,agg.path_cmd_move_to, agg.path_flags_none),
                         (2.0,3.0,agg.path_cmd_line_to, agg.path_flags_none),
                         (3.0,3.0,agg.path_cmd_line_to, agg.path_flags_none),
                         (3.0,2.0,agg.path_cmd_line_to, agg.path_flags_none),
                         (0.0,0.0,agg.path_cmd_end_poly, agg.path_flags_close),
                         (0.0,0.0,agg.path_cmd_stop, agg.path_flags_none),))
        self.assertTrue(allclose(actual,desired))

    def test_rects_array(self):
        rects = array(((1.0,1.0,1.0,1.0),
                       (2.0,2.0,1.0,1.0)))
        self.base_rects(rects)

    def test_rects_list(self):
        rects = [[1.0,1.0,1.0,1.0],
                 [2.0,2.0,1.0,1.0]]
        self.base_rects(rects)


    def test_rect(self):
        gc = agg.GraphicsContextArray((100,100))
        gc.rect(1.0,1.0,1.0,1.0)
        actual = gc._get_path()._vertices()
        desired = array(((1.0,1.0,agg.path_cmd_move_to, agg.path_flags_none),
                         (1.0,2.0,agg.path_cmd_line_to, agg.path_flags_none),
                         (2.0,2.0,agg.path_cmd_line_to, agg.path_flags_none),
                         (2.0,1.0,agg.path_cmd_line_to, agg.path_flags_none),
                         (0.0,0.0,agg.path_cmd_end_poly, agg.path_flags_close),
                         (0.0,0.0,agg.path_cmd_stop, agg.path_flags_none),))
        self.assertTrue(allclose(actual,desired))

    def test_clip_to_rect(self):
        gc = agg.GraphicsContextArray((10,10))
        gc.move_to(0,0)
        gc.line_to(10,10)
        gc.clip_to_rect(5,5,5,5)
        gc.stroke_path()
        #print 'clipping on'
        #print gc.bmp_array[:,:,0]
        # make sure nothing was drawn in the corner
        self.assertEqual(gc.bmp_array[-1,0,0], 255)

    def test_stroke_path(self):
        gc = agg.GraphicsContextArray((5,5))
        gc.move_to(0,0)
        gc.line_to(5,5)
        gc.stroke_path()
        #print
        #print "stroke lower-left to upper-right:"
        #print gc.bmp_array[:,:,0]
        # assert the lower left and upper corner are the same,
        # and have something drawn in them.
        self.assertEqual(gc.bmp_array[-1,0,0], gc.bmp_array[0,-1,0])
        self.assertNotEqual(gc.bmp_array[-1,0,0], 255)

    def test_set_get_text_position(self):
        #print 'testing text position'
        gc = agg.GraphicsContextArray((5,5))
        gc.set_text_position(1,1)
        actual = gc.get_text_position()
        desired = (1,1)
        self.assertTrue(allclose(actual,desired))


    def test_get_set_font(self):
        gc = agg.GraphicsContextArray((5,5))
        font1 = Font('modern')
        gc.set_font(font1)
        font3 = gc.get_font()
        self.assertEqual(font1.face_name, font3.name)
        self.assertEqual(font1.size, font3.size)
        self.assertEqual(font1.family, font3.family)
        self.assertEqual(font1.style, font3.style)
        self.assertEqual(font1.encoding, font3.encoding)

    def test_set_line_dash_none(self):
        gc = agg.GraphicsContextArray((5,5))
        gc.set_line_dash(None)
        # !! need to add an accessor to test result

    def test_set_line_dash_list(self):
        gc = agg.GraphicsContextArray((5,5))
        gc.set_line_dash([2,3])
        # !! need to add an accessor to test result

    def test_set_line_dash_2d_list(self):
        gc = agg.GraphicsContextArray((5,5))
        try:
            gc.set_line_dash([[2,3],[2,3]])
        except TypeError:
            pass


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