from kivy.tests.common import GraphicUnitTest, UTMotionEvent

from kivy.lang import Builder
from kivy.base import EventLoop
from kivy.weakproxy import WeakProxy
from time import sleep

DropDown = None


KV = '''
# +/- copied from ActionBar example + edited for the test
FloatLayout:
    ActionBar:
        pos_hint: {'top': 1}
        ActionView:
            use_separator: True
            ActionPrevious:
                title: 'Action Bar'
                with_previous: False
            ActionOverflow:
            ActionButton:
                text: 'Btn0'
                icon: 'atlas://data/images/defaulttheme/audio-volume-high'
            ActionButton:
                text: 'Btn1'
            ActionButton:
                text: 'Btn2'
            ActionGroup:
                id: group1
                text: 'group 1'
                ActionButton:
                    id: group1button
                    text: 'Btn3'
                    on_release:
                        setattr(root, 'g1button', True)
                ActionButton:
                    text: 'Btn4'
            ActionGroup:
                id: group2
                dropdown_width: 200
                text: 'group 2'
                ActionButton:
                    id: group2button
                    text: 'Btn5'
                    on_release:
                        setattr(root, 'g2button', True)
                ActionButton:
                    text: 'Btn6'
                ActionButton:
                    text: 'Btn7'
'''


class TouchPoint(UTMotionEvent):
    def __init__(self, raw_x, raw_y):
        win = EventLoop.window
        super().__init__(
            "unittest", 1, {
                "x": raw_x / float(win.width),
                "y": raw_y / float(win.height),
            }
        )
        # press & release
        EventLoop.post_dispatch_input("begin", self)
        EventLoop.post_dispatch_input("end", self)
        EventLoop.idle()


class ActionBarTestCase(GraphicUnitTest):
    framecount = 0

    def setUp(self):
        global DropDown
        from kivy.uix.dropdown import DropDown

        # kill KV lang logging (too long test)
        import kivy.lang.builder as builder

        if not hasattr(self, '_trace'):
            self._trace = builder.trace

        self.builder = builder
        builder.trace = lambda *_, **__: None
        super(ActionBarTestCase, self).setUp()

    def tearDown(self, *args, **kwargs):
        # add the logging back
        import kivy.lang.builder as builder
        builder.trace = self._trace
        super(ActionBarTestCase, self).tearDown(*args, **kwargs)

    def move_frames(self, t):
        for i in range(t):
            EventLoop.idle()

    def clean_garbage(self, *args):
        for child in self._win.children[:]:
            self._win.remove_widget(child)
        self.move_frames(5)

    def check_dropdown(self, present=True):
        any_list = [
            isinstance(child, DropDown)
            for child in self._win.children
        ]

        # mustn't allow more than one DropDown opened!
        self.assertLess(sum(any_list), 2)

        # passed
        if not present and not any(any_list):
            return
        elif present and any(any_list):
            return

        print('DropDown either missing, or isn\'t supposed to be there')
        self.assertTrue(False)

    def test_1_openclose(self, *args):
        # click on Group 2 to open its DropDown
        # - DropDown shows up
        # then click away
        # - Group 2 DropDown disappears
        # click on Group 1 to open its DropDown
        # - DropDown shows up
        # then click away
        # - Group 1 DropDown disappears
        self._win = EventLoop.window
        self.clean_garbage()
        root = Builder.load_string(KV)
        self.render(root)
        self.assertLess(len(self._win.children), 2)
        group2 = root.ids.group2
        group1 = root.ids.group1
        self.move_frames(5)

        # no DropDown present yet
        self.check_dropdown(present=False)
        self.assertFalse(group2.is_open)
        self.assertFalse(group1.is_open)

        items = ((group2, group1), (group1, group2))
        for item in items:
            active, passive = item
            # click on active Group
            TouchPoint(*active.center)

            # active Group DropDown shows up
            self.check_dropdown(present=True)
            gdd = WeakProxy(self._win.children[0])

            # active Group DropDown == value in WeakProxy
            self.assertIn(gdd, self._win.children)
            self.assertEqual(gdd, self._win.children[0])
            self.assertTrue(active.is_open)
            self.assertFalse(passive.is_open)

            # click away
            TouchPoint(0, 0)

            # wait for closed Group DropDown to disappear
            # go to the next frame after the DropDown disappeared
            sleep(gdd.min_state_time)
            self.move_frames(1)

            # no DropDown is open
            self.assertNotEqual(gdd, self._win.children[0])
            self.assertLess(len(self._win.children), 2)
            self.check_dropdown(present=False)
            self.assertFalse(active.is_open)
            self.assertFalse(passive.is_open)
        self._win.remove_widget(root)

    def test_2_switch(self, *args):
        # click on Group 2 to open its DropDown
        # - DropDown shows up
        # then click on Group 1 to open its DropDown
        # - Group 2 DropDown disappears, Group 1 DropDown shows up
        # click away
        # - no DropDown is opened
        self._win = EventLoop.window
        self.clean_garbage()
        root = Builder.load_string(KV)
        self.render(root)
        self.assertLess(len(self._win.children), 2)
        group2 = root.ids.group2
        group1 = root.ids.group1
        self.move_frames(5)

        # no DropDown present yet
        self.check_dropdown(present=False)
        self.assertFalse(group2.is_open)
        self.assertFalse(group1.is_open)

        # click on Group 2
        TouchPoint(*group2.center)

        # Group 2 DropDown shows up
        self.check_dropdown(present=True)
        g2dd = WeakProxy(self._win.children[0])

        # Group 2 DropDown == value in WeakProxy
        self.assertIn(g2dd, self._win.children)
        self.assertEqual(g2dd, self._win.children[0])
        self.assertTrue(group2.is_open)
        self.assertFalse(group1.is_open)

        # click away from ActionBar and wait for it to disappear
        TouchPoint(0, 0)
        sleep(g2dd.min_state_time)
        self.move_frames(1)

        # click on Group 1
        TouchPoint(*group1.center)

        # wait for closed Group 2 DropDown to disappear
        # and for Group 1 DropDown to appear (there are 2 DDs now)
        # go to the next frame after the DropDown disappeared
        sleep(g2dd.min_state_time)
        self.move_frames(1)

        # Group 1 DropDown != value in WeakProxy (Group 2 DD)
        self.assertNotEqual(g2dd, self._win.children[0])
        self.assertFalse(group2.is_open)
        self.assertTrue(group1.is_open)
        self.check_dropdown(present=True)

        # click away from ActionBar
        TouchPoint(0, 0)

        # wait for closed Group DropDown to disappear
        # go to the next frame after the DropDown disappeared
        sleep(g2dd.min_state_time)
        self.move_frames(1)

        # no DropDown present in Window
        self.check_dropdown(present=False)
        self.assertFalse(group2.is_open)
        self.assertFalse(group1.is_open)
        self.assertNotIn(g2dd, self._win.children)
        self._win.remove_widget(root)

    def test_3_openpress(self, *args):
        # click on Group 2 to open its DropDown
        # - DropDown shows up
        # then click on Group 2 DropDown button
        # - DropDown disappears
        # click on Group 1 to open its DropDown
        # - DropDown shows up
        # then click on Group 1 DropDown button
        # - DropDown disappears
        self._win = EventLoop.window
        self.clean_garbage()
        root = Builder.load_string(KV)
        self.render(root)
        self.assertLess(len(self._win.children), 2)
        group2 = root.ids.group2
        group2button = root.ids.group2button
        group1 = root.ids.group1
        group1button = root.ids.group1button
        self.move_frames(5)

        # no DropDown present yet
        self.check_dropdown(present=False)
        self.assertFalse(group2.is_open)
        self.assertFalse(group1.is_open)

        items = (
            (group2, group1, group2button),
            (group1, group2, group1button)
        )
        for item in items:
            active, passive, button = item

            # click on active Group
            TouchPoint(*active.center)

            # active Group DropDown shows up
            self.check_dropdown(present=True)
            gdd = WeakProxy(self._win.children[0])

            # active Group DropDown == value in WeakProxy
            self.assertIn(gdd, self._win.children)
            self.assertEqual(gdd, self._win.children[0])
            self.assertTrue(active.is_open)
            self.assertFalse(passive.is_open)

            # click on active Group DropDown Button (needed to_window)
            TouchPoint(*button.to_window(*button.center))
            self.assertTrue(getattr(
                root, active.text[0::6] + 'button'
            ))

            # wait for closed Group DropDown to disappear
            # go to the next frame after the DropDown disappeared
            sleep(gdd.min_state_time)
            self.move_frames(1)

            # no DropDown is open
            self.assertNotEqual(gdd, self._win.children[0])
            self.assertLess(len(self._win.children), 2)
            self.assertFalse(active.is_open)
            self.assertFalse(passive.is_open)
            self.check_dropdown(present=False)
        self._win.remove_widget(root)

    def test_4_openmulti(self, *args):
        # click on Group to open its DropDown
        # - DropDown shows up
        # then click on Group DropDown button
        # - DropDown disappears
        # repeat
        self._win = EventLoop.window
        self.clean_garbage()
        root = Builder.load_string(KV)
        self.render(root)
        self.assertLess(len(self._win.children), 2)
        group2 = root.ids.group2
        group2button = root.ids.group2button
        group1 = root.ids.group1
        group1button = root.ids.group1button
        self.move_frames(5)

        # no DropDown present yet
        self.check_dropdown(present=False)
        self.assertFalse(group2.is_open)

        items = ((group2, group2button), (group1, group1button))
        for item in items:
            group, button = item

            for _ in range(5):
                # click on Group
                TouchPoint(*group.center)

                # Group DropDown shows up
                self.check_dropdown(present=True)
                gdd = WeakProxy(self._win.children[0])

                # Group DropDown == value in WeakProxy
                self.assertIn(gdd, self._win.children)
                self.assertEqual(gdd, self._win.children[0])
                self.assertTrue(group.is_open)

                # click on Group DropDown Button
                TouchPoint(*button.to_window(*button.center))

                # wait for closed Group DropDown to disappear
                # go to the next frame after the DropDown disappeared
                sleep(gdd.min_state_time)
                self.move_frames(1)

                # no DropDown is open
                self.assertNotEqual(gdd, self._win.children[0])
                self.assertFalse(group.is_open)
                self.check_dropdown(present=False)
        self._win.remove_widget(root)


if __name__ == '__main__':
    import unittest
    unittest.main()
