# -*- coding: utf-8 -*-

"""Test CLR class constructor support."""

import pytest
import sys

import System


def test_enum_constructor():
    """Test enum constructor args"""
    from System import TypeCode
    from Python.Test import EnumConstructorTest

    ob = EnumConstructorTest(TypeCode.Int32)
    assert ob.value == TypeCode.Int32


def test_flags_constructor():
    """Test flags constructor args"""
    from Python.Test import FlagsConstructorTest
    from System.IO import FileAccess

    flags = FileAccess.Read | FileAccess.Write
    ob = FlagsConstructorTest(flags)
    assert ob.value == flags


def test_struct_constructor():
    """Test struct constructor args"""
    from System import Guid
    from Python.Test import StructConstructorTest

    guid = Guid.NewGuid()
    ob = StructConstructorTest(guid)
    assert ob.value == guid


def test_datetime():
    inst = System.DateTime(2021, 12, 29)
    assert inst.Year == 2021


def test_subclass_constructor():
    """Test subclass constructor args"""
    from Python.Test import SubclassConstructorTest

    class Sub(System.Exception):
        pass

    instance = Sub()
    ob = SubclassConstructorTest(instance)
    assert isinstance(ob.value, System.Exception)


def test_multiple_constructor():
    from Python.Test import MultipleConstructorsTest

    # Test parameterless
    ob = MultipleConstructorsTest()
    assert ob.value == ""


def test_default_constructor_fallback():
    from Python.Test import DefaultConstructorMatching

    ob = DefaultConstructorMatching(2)
    assert ob.a == 2

    with pytest.raises(TypeError):
        ob = DefaultConstructorMatching("2")


def test_constructor_leak():
    from System import Uri
    from Python.Runtime import Runtime

    uri = Uri("http://www.python.org")
    Runtime.TryCollectingGarbage(20)
    ref_count = sys.getrefcount(uri)

    # check disabled due to GC uncertainty
    # assert ref_count == 1


def test_string_constructor():
    from System import String, Char, Array

    ob = String('A', 10)
    assert ob == 'A' * 10

    arr = Array[Char](10)
    for i in range(10):
        arr[i] = Char(str(i))

    ob = String(arr)
    assert ob == "0123456789"

    ob = String(arr, 5, 4)
    assert ob == "5678"