import unittest

import gi.docstring

from gi.repository import GIMarshallingTests
from gi.repository import Gio
from gi.repository import GObject
from gi.repository import GLib

try:
    import cairo
    cairo = cairo
    has_cairo = True
    from gi.repository import Regress
    from gi.repository import Gtk
except ImportError:
    has_cairo = False


class Test(unittest.TestCase):
    def test_api(self):
        new_func = lambda info: 'docstring test'
        old_func = gi.docstring.get_doc_string_generator()

        gi.docstring.set_doc_string_generator(new_func)
        self.assertEqual(gi.docstring.get_doc_string_generator(),
                         new_func)
        self.assertEqual(gi.docstring.generate_doc_string(None),
                         'docstring test')

        # Set back to original generator
        gi.docstring.set_doc_string_generator(old_func)
        self.assertEqual(gi.docstring.get_doc_string_generator(),
                         old_func)

    def test_final_signature_with_full_inout(self):
        self.assertEqual(GIMarshallingTests.Object.full_inout.__doc__,
                         'full_inout(object:GIMarshallingTests.Object) -> object:GIMarshallingTests.Object')

    def test_overridden_doc_is_not_clobbered(self):
        self.assertEqual(GIMarshallingTests.OverridesObject.method.__doc__,
                         'Overridden doc string.')

    def test_allow_none_with_user_data_defaults(self):
        g_file_copy_doc = 'copy(self, destination:Gio.File, ' \
                          'flags:Gio.FileCopyFlags, ' \
                          'cancellable:Gio.Cancellable=None, ' \
                          'progress_callback:Gio.FileProgressCallback=None, ' \
                          'progress_callback_data=None) -> bool'

        self.assertEqual(Gio.File.copy.__doc__, g_file_copy_doc)

    def test_array_length_arg(self):
        self.assertEqual(GIMarshallingTests.array_in.__doc__,
                         'array_in(ints:list)')

    def test_init_function(self):
        # This tests implicit array length args along with skipping a
        # boolean return
        self.assertEqual(GIMarshallingTests.init_function.__doc__,
                         'init_function(argv:list=None) -> bool, argv:list')

    def test_boolean_return(self):
        self.assertEqual(GIMarshallingTests.boolean_return_true.__doc__,
                         'boolean_return_true() -> bool')

    @unittest.skipUnless((GLib.MAJOR_VERSION, GLib.MINOR_VERSION) >= (2, 42),
                         "nullable was added in newer glib/gi")
    # https://bugzilla.gnome.org/show_bug.cgi?id=740301
    def test_may_return_none(self):
        self.assertEqual(Gio.File.get_basename.__doc__,
                         'get_basename(self) -> str or None')

    def test_class_doc_constructors(self):
        doc = GIMarshallingTests.Object.__doc__
        self.assertTrue('new(int_:int)' in doc)

    def test_struct_doc_constructors(self):
        doc = GIMarshallingTests.BoxedStruct.__doc__
        self.assertTrue('new()' in doc)
        self.assertTrue('BoxedStruct()' in doc)

    @unittest.skipUnless(has_cairo, 'built without cairo support')
    def test_private_struct_constructors(self):
        # Structs without a size or constructor should have no constructor docs.
        doc = Regress.TestBoxedPrivate.__doc__
        self.assertEqual(doc, '')

    def test_array_inout_etc(self):
        self.assertEqual(GIMarshallingTests.array_inout_etc.__doc__,
                         'array_inout_etc(first:int, ints:list, last:int) -> ints:list, sum:int')

    def test_array_out_etc(self):
        self.assertEqual(GIMarshallingTests.array_out_etc.__doc__,
                         'array_out_etc(first:int, last:int) -> ints:list, sum:int')

    @unittest.skipUnless(has_cairo, 'built without cairo support')
    def test_shared_array_length_with_prior_out_arg(self):
        # Test the 'iter' out argument does not effect length argument skipping.
        self.assertEqual(Gtk.ListStore.insert_with_valuesv.__doc__,
                         'insert_with_valuesv(self, position:int, columns:list, values:list) -> iter:Gtk.TreeIter')

    def test_sub_class_doc(self):
        class A(GObject.Object):
            """first doc"""
            pass

        class B(A):
            """second doc"""
            pass

        self.assertEqual(A.__doc__, "first doc")
        self.assertEqual(B.__doc__, "second doc")

    def test_sub_class_no_doc(self):
        class A(GObject.Object):
            pass

        class B(A):
            """sub-class doc"""

        self.assertEqual(A.__doc__, None)
        self.assertEqual(B.__doc__, "sub-class doc")

    @unittest.expectedFailure  # https://bugzilla.gnome.org/show_bug.cgi?id=734926
    def test_sub_class_doc_setattr(self):
        class A(GObject.Object):
            pass

        class B(A):
            pass

        A.__doc__ = 'custom doc'

        self.assertEqual(A.__doc__, "custom doc")
        self.assertEqual(B.__doc__, "custom doc")