import sys

import pytest

from swift.codegen.test.utils import *
from swift.codegen.lib.schema import defs


def test_empty_schema():
    @schema.load
    class data:
        pass

    assert data.classes == {}
    assert data.includes == set()


def test_one_empty_class():
    @schema.load
    class data:
        class MyClass:
            pass

    assert data.classes == {
        'MyClass': schema.Class('MyClass'),
    }


def test_two_empty_classes():
    @schema.load
    class data:
        class MyClass1:
            pass

        class MyClass2(MyClass1):
            pass

    assert data.classes == {
        'MyClass1': schema.Class('MyClass1', derived={'MyClass2'}),
        'MyClass2': schema.Class('MyClass2', bases=['MyClass1']),
    }


def test_no_external_bases():
    class A:
        pass

    with pytest.raises(schema.Error):
        @schema.load
        class data:
            class MyClass(A):
                pass


def test_no_multiple_roots():
    with pytest.raises(schema.Error):
        @schema.load
        class data:
            class MyClass1:
                pass

            class MyClass2:
                pass


def test_empty_classes_diamond():
    @schema.load
    class data:
        class A:
            pass

        class B(A):
            pass

        class C(A):
            pass

        class D(B, C):
            pass

    assert data.classes == {
        'A': schema.Class('A', derived={'B', 'C'}),
        'B': schema.Class('B', bases=['A'], derived={'D'}),
        'C': schema.Class('C', bases=['A'], derived={'D'}),
        'D': schema.Class('D', bases=['B', 'C']),
    }


#
def test_group():
    @schema.load
    class data:
        @defs.group("xxx")
        class A:
            pass

    assert data.classes == {
        'A': schema.Class('A', group="xxx"),
    }


def test_group_is_inherited():
    @schema.load
    class data:
        class A:
            pass

        class B(A):
            pass

        @defs.group('xxx')
        class C(A):
            pass

        class D(B, C):
            pass

    assert data.classes == {
        'A': schema.Class('A', derived={'B', 'C'}),
        'B': schema.Class('B', bases=['A'], derived={'D'}),
        'C': schema.Class('C', bases=['A'], derived={'D'}, group='xxx'),
        'D': schema.Class('D', bases=['B', 'C'], group='xxx'),
    }


def test_no_mixed_groups_in_bases():
    with pytest.raises(schema.Error):
        @schema.load
        class data:
            class A:
                pass

            @defs.group('x')
            class B(A):
                pass

            @defs.group('y')
            class C(A):
                pass

            class D(B, C):
                pass

#


def test_lowercase_rejected():
    with pytest.raises(schema.Error):
        @schema.load
        class data:
            class aLowerCase:
                pass


def test_properties():
    @schema.load
    class data:
        class A:
            one: defs.string
            two: defs.optional[defs.int]
            three: defs.list[defs.boolean]
            four: defs.list[defs.optional[defs.string]]
            five: defs.predicate

    assert data.classes == {
        'A': schema.Class('A', properties=[
            schema.SingleProperty('one', 'string'),
            schema.OptionalProperty('two', 'int'),
            schema.RepeatedProperty('three', 'boolean'),
            schema.RepeatedOptionalProperty('four', 'string'),
            schema.PredicateProperty('five'),
        ]),
    }


def test_class_properties():
    class A:
        pass

    @schema.load
    class data:
        class A:
            pass

        class B(A):
            one: A
            two: defs.optional[A]
            three: defs.list[A]
            four: defs.list[defs.optional[A]]

    assert data.classes == {
        'A': schema.Class('A', derived={'B'}),
        'B': schema.Class('B', bases=['A'], properties=[
            schema.SingleProperty('one', 'A'),
            schema.OptionalProperty('two', 'A'),
            schema.RepeatedProperty('three', 'A'),
            schema.RepeatedOptionalProperty('four', 'A'),
        ]),
    }


def test_string_reference_class_properties():
    @schema.load
    class data:
        class A:
            one: "A"
            two: defs.optional["A"]
            three: defs.list["A"]
            four: defs.list[defs.optional["A"]]

    assert data.classes == {
        'A': schema.Class('A', properties=[
            schema.SingleProperty('one', 'A'),
            schema.OptionalProperty('two', 'A'),
            schema.RepeatedProperty('three', 'A'),
            schema.RepeatedOptionalProperty('four', 'A'),
        ]),
    }


@pytest.mark.parametrize("spec", [lambda t: t, lambda t: defs.optional[t], lambda t: defs.list[t],
                                  lambda t: defs.list[defs.optional[t]]])
def test_string_reference_dangling(spec):
    with pytest.raises(schema.Error):
        @schema.load
        class data:
            class A:
                x: spec("B")


def test_children():
    @schema.load
    class data:
        class A:
            one: "A" | defs.child
            two: defs.optional["A"] | defs.child
            three: defs.list["A"] | defs.child
            four: defs.list[defs.optional["A"]] | defs.child

    assert data.classes == {
        'A': schema.Class('A', properties=[
            schema.SingleProperty('one', 'A', is_child=True),
            schema.OptionalProperty('two', 'A', is_child=True),
            schema.RepeatedProperty('three', 'A', is_child=True),
            schema.RepeatedOptionalProperty('four', 'A', is_child=True),
        ]),
    }


@pytest.mark.parametrize("spec", [defs.string, defs.int, defs.boolean, defs.predicate])
def test_builtin_and_predicate_children_not_allowed(spec):
    with pytest.raises(schema.Error):
        @schema.load
        class data:
            class A:
                x: spec | defs.child


_pragmas = [(defs.qltest.skip, "qltest_skip"),
            (defs.qltest.collapse_hierarchy, "qltest_collapse_hierarchy"),
            (defs.qltest.uncollapse_hierarchy, "qltest_uncollapse_hierarchy"),
            (defs.cpp.skip, "cpp_skip"),
            ]


@pytest.mark.parametrize("pragma,expected", _pragmas)
def test_property_with_pragma(pragma, expected):
    @schema.load
    class data:
        class A:
            x: defs.string | pragma

    assert data.classes == {
        'A': schema.Class('A', properties=[
            schema.SingleProperty('x', 'string', pragmas=[expected]),
        ]),
    }


def test_property_with_pragmas():
    spec = defs.string
    for pragma, _ in _pragmas:
        spec |= pragma

    @schema.load
    class data:
        class A:
            x: spec

    assert data.classes == {
        'A': schema.Class('A', properties=[
            schema.SingleProperty('x', 'string', pragmas=[expected for _, expected in _pragmas]),
        ]),
    }


@pytest.mark.parametrize("pragma,expected", _pragmas)
def test_class_with_pragma(pragma, expected):
    @schema.load
    class data:
        @pragma
        class A:
            pass

    assert data.classes == {
        'A': schema.Class('A', pragmas=[expected]),
    }


def test_class_with_pragmas():
    def apply_pragmas(cls):
        for p, _ in _pragmas:
            p(cls)

    @schema.load
    class data:
        class A:
            pass

        apply_pragmas(A)

    assert data.classes == {
        'A': schema.Class('A', pragmas=[e for _, e in _pragmas]),
    }


def test_ipa_from_class():
    @schema.load
    class data:
        class A:
            pass

        @defs.synth.from_class(A)
        class B(A):
            pass

    assert data.classes == {
        'A': schema.Class('A', derived={'B'}),
        'B': schema.Class('B', bases=['A'], ipa=schema.IpaInfo(from_class="A")),
    }


def test_ipa_from_class_ref():
    @schema.load
    class data:
        @defs.synth.from_class("B")
        class A:
            pass

        class B(A):
            pass

    assert data.classes == {
        'A': schema.Class('A', derived={'B'}, ipa=schema.IpaInfo(from_class="B")),
        'B': schema.Class('B', bases=['A']),
    }


def test_ipa_from_class_dangling():
    with pytest.raises(schema.Error):
        @schema.load
        class data:
            @defs.synth.from_class("X")
            class A:
                pass


def test_ipa_class_on():
    @schema.load
    class data:
        class A:
            pass

        @defs.synth.on_arguments(a=A, i=defs.int)
        class B(A):
            pass

    assert data.classes == {
        'A': schema.Class('A', derived={'B'}),
        'B': schema.Class('B', bases=['A'], ipa=schema.IpaInfo(on_arguments={'a': 'A', 'i': 'int'})),
    }


def test_ipa_class_on_ref():
    class A:
        pass

    @schema.load
    class data:
        @defs.synth.on_arguments(b="B", i=defs.int)
        class A:
            pass

        class B(A):
            pass

    assert data.classes == {
        'A': schema.Class('A', derived={'B'}, ipa=schema.IpaInfo(on_arguments={'b': 'B', 'i': 'int'})),
        'B': schema.Class('B', bases=['A']),
    }


def test_ipa_class_on_dangling():
    with pytest.raises(schema.Error):
        @schema.load
        class data:
            @defs.synth.on_arguments(s=defs.string, a="A", i=defs.int)
            class B:
                pass


if __name__ == '__main__':
    sys.exit(pytest.main([__file__] + sys.argv[1:]))