import unittest
'''ACHTUNG: when testing, never re-use widget names, otherwise the tests
may fail as the namespace will remember the names between tests.
'''


class KNSpaceTestCase(unittest.TestCase):

    def test_not_exists(self):
        from kivy.uix.behaviors.knspace import knspace
        self.assertRaises(AttributeError, lambda: knspace.label)

    def test_not_exists_property(self):
        from kivy.uix.behaviors.knspace import knspace
        self.assertRaises(AttributeError, lambda: knspace.label2)
        knspace.property('label2')
        self.assertIsNone(knspace.label2)

    def test_allow_none(self):
        from kivy.uix.behaviors.knspace import knspace, KNSpaceBehavior
        from kivy.uix.widget import Widget

        class MyWidget(KNSpaceBehavior, Widget):
            pass
        knspace.label3 = 1
        knspace.label3 = None
        w = MyWidget()
        w.knspace = knspace
        w.knspace = None

    def test_name(self):
        from kivy.uix.behaviors.knspace import knspace, KNSpaceBehavior
        from kivy.uix.widget import Widget

        class MyWidget(KNSpaceBehavior, Widget):
            pass
        w = MyWidget()
        w.knsname = 'label4'
        w.knsname = ''

    def test_proxy_ref(self):
        from kivy.uix.behaviors.knspace import knspace
        from kivy.uix.widget import Widget

        w = Widget()
        knspace.widget1 = w
        self.assertIs(w.proxy_ref, knspace.widget1)
        knspace.widget1 = 55
        self.assertIs(55, knspace.widget1)

    def test_constructor(self):
        from kivy.uix.behaviors.knspace import knspace, KNSpaceBehavior
        from kivy.uix.widget import Widget

        class MyWidget(KNSpaceBehavior, Widget):
            pass

        w = MyWidget(knsname='construct_name')
        self.assertEqual(knspace.construct_name, w)

    def test_re_assign(self):
        from kivy.uix.behaviors.knspace import knspace, KNSpaceBehavior
        from kivy.uix.widget import Widget

        class MyWidget(KNSpaceBehavior, Widget):
            pass

        w = MyWidget(knsname='construct_name2')
        self.assertEqual(knspace.construct_name2, w)
        w2 = MyWidget(knsname='construct_name2')
        self.assertEqual(knspace.construct_name2, w2)

    def test_simple(self):
        from kivy.lang import Builder
        from kivy.uix.behaviors.knspace import knspace

        w = Builder.load_string('''
<NamedLabel@KNSpaceBehavior+Label>

NamedLabel:
    knsname: 'label5'
    text: 'Hello'
''')
        self.assertEqual(knspace.label5, w)
        self.assertIs(w, knspace.label5.__self__)
        self.assertIsNot(w, knspace.label5)
        self.assertEqual('Hello', knspace.label5.text)
        w.text = 'Goodbye'
        self.assertEqual('Goodbye', knspace.label5.text)

    def test_simple_multiple_names(self):
        from kivy.lang import Builder
        from kivy.uix.behaviors.knspace import knspace

        w = Builder.load_string('''
<NamedLabel@KNSpaceBehavior+Label>

BoxLayout:
    NamedLabel:
        knsname: 'label61'
        text: 'Hello'
    NamedLabel:
        knsname: 'label62'
        text: 'Goodbye'
''')
        self.assertEqual('Hello', knspace.label61.text)
        self.assertEqual('Goodbye', knspace.label62.text)

    def test_simple_binding(self):
        from kivy.lang import Builder
        from kivy.uix.behaviors.knspace import knspace

        w = Builder.load_string('''
#:import knspace kivy.uix.behaviors.knspace.knspace
<NamedLabel@KNSpaceBehavior+Label>

BoxLayout:
    text: knspace.label7.text if knspace.label7 else ''
    NamedLabel:
        knsname: 'label7'
        text: 'Hello'
''')
        self.assertEqual('Hello', w.text)
        knspace.label7.text = 'Goodbye'
        self.assertEqual('Goodbye', w.text)

    def test_simple_name_change(self):
        from kivy.lang import Builder
        from kivy.uix.behaviors.knspace import knspace

        w = Builder.load_string('''
<NamedLabel@KNSpaceBehavior+Label>

NamedLabel:
    knsname: 'label8'
    text: 'Hello'
''')
        self.assertEqual(w, knspace.label8)
        w.knsname = 'named_label8'
        self.assertIsNone(knspace.label8)
        self.assertEqual(w, knspace.named_label8)

    def test_fork_string(self):
        from kivy.lang import Builder
        from kivy.uix.behaviors.knspace import knspace

        w = Builder.load_string('''
<NamedLabel@KNSpaceBehavior+Label>

BoxLayout:
    NamedLabel:
        knspace: 'fork'
        knsname: 'label9'
        text: 'Hello'
    NamedLabel:
        knspace: 'fork'
        knsname: 'label9'
        text: 'Goodbye'
''')
        self.assertEqual(w.children[0].knspace.label9.text, 'Goodbye')
        self.assertEqual(w.children[1].knspace.label9.text, 'Hello')

    def test_fork(self):
        from kivy.lang import Builder
        from kivy.uix.behaviors.knspace import knspace, KNSpaceBehavior
        from kivy.uix.widget import Widget

        class NamedWidget(KNSpaceBehavior, Widget):
            pass
        nw = NamedWidget()
        w = Widget()
        w2 = Widget()

        before = knspace.fork()
        knspace.widget2 = w
        after = knspace.fork()
        self.assertEqual(knspace.widget2, w)
        self.assertEqual(before.widget2, w)
        self.assertEqual(after.widget2, w)

        child = knspace.fork()
        child2 = knspace.fork()
        grandchild = child.fork()
        child.widget3 = w2
        self.assertEqual(grandchild.widget3, w2)
        self.assertEqual(child.widget3, w2)
        # this could actually be none rather than raising, depending
        # on when the class was instantiated. So if this fails, change the
        # test to assert is none.
        self.assertIsNone(knspace.widget3)
        grandchild.parent = child2
        self.assertIsNone(grandchild.widget3)

    def test_fork_binding(self):
        from kivy.lang import Builder
        from kivy.uix.behaviors.knspace import knspace

        w = Builder.load_string('''
<NamedLabel@KNSpaceBehavior+Label>

<MyComplexWidget@NamedLabel>:
    knsname: 'root_label'
    text: 'Hello'
    NamedLabel:
        id: child
        knsname: 'child_label'
        text: self.knspace.root_label.text if self.knspace.root_label else ''

BoxLayout:
    MyComplexWidget:
        knspace: 'fork'
        id: first
    MyComplexWidget:
        knspace: 'fork'
        id: second
''')
        self.assertEqual(w.ids.first.ids.child.text, 'Hello')
        self.assertEqual(w.ids.second.ids.child.text, 'Hello')
        self.assertEqual(w.ids.first.knspace.child_label.text, 'Hello')
        self.assertEqual(w.ids.second.knspace.child_label.text, 'Hello')

        w.ids.first.text = 'Goodbye'
        self.assertEqual(w.ids.first.ids.child.text, 'Goodbye')
        self.assertEqual(w.ids.second.ids.child.text, 'Hello')
        self.assertEqual(w.ids.first.knspace.child_label.text, 'Goodbye')
        self.assertEqual(w.ids.second.knspace.child_label.text, 'Hello')

        first = w.ids.first.knspace
        w.ids.first.knspace = w.ids.second.knspace
        w.ids.second.knspace = first
        self.assertEqual(w.ids.first.ids.child.text, 'Goodbye')
        self.assertEqual(w.ids.second.ids.child.text, 'Hello')
        self.assertEqual(w.ids.first.knspace.child_label.text, 'Goodbye')
        self.assertEqual(w.ids.second.knspace.child_label.text, 'Hello')

        w.ids.first.text = 'Goodbye2'
        self.assertEqual(w.ids.first.ids.child.text, 'Goodbye2')
        self.assertEqual(w.ids.second.ids.child.text, 'Hello')
        self.assertEqual(w.ids.first.knspace.child_label.text, 'Goodbye2')
        self.assertEqual(w.ids.second.knspace.child_label.text, 'Hello')

        w.ids.first.knspace.root_label.text = 'Goodbye3'
        self.assertEqual(w.ids.first.ids.child.text, 'Goodbye3')
        self.assertEqual(w.ids.second.ids.child.text, 'Hello')
        self.assertEqual(w.ids.first.knspace.child_label.text, 'Goodbye3')
        self.assertEqual(w.ids.second.knspace.child_label.text, 'Hello')