import pytest

from aiogram.dispatcher.filters.state import State, StatesGroup, any_state, default_state


class MyGroup(StatesGroup):
    state = State()
    state_1 = State()
    state_2 = State()

    class MySubGroup(StatesGroup):
        sub_state = State()
        sub_state_1 = State()
        sub_state_2 = State()

        in_custom_group = State(group_name="custom_group")

        class NewGroup(StatesGroup):
            spam = State()
            renamed_state = State(state="spam_state")


alone_state = State("alone")
alone_in_group = State("alone", group_name="home")


def test_default_state():
    assert default_state.state is None


def test_any_state():
    assert any_state.state == "*"


def test_alone_state():
    assert alone_state.state == "@:alone"
    assert alone_in_group.state == "home:alone"


def test_group_names():
    assert MyGroup.__group_name__ == "MyGroup"
    assert MyGroup.__full_group_name__ == "MyGroup"

    assert MyGroup.MySubGroup.__group_name__ == "MySubGroup"
    assert MyGroup.MySubGroup.__full_group_name__ == "MyGroup.MySubGroup"

    assert MyGroup.MySubGroup.NewGroup.__group_name__ == "NewGroup"
    assert MyGroup.MySubGroup.NewGroup.__full_group_name__ == "MyGroup.MySubGroup.NewGroup"


def test_custom_group_in_group():
    assert MyGroup.MySubGroup.in_custom_group.state == "custom_group:in_custom_group"


def test_custom_state_name_in_group():
    assert (
        MyGroup.MySubGroup.NewGroup.renamed_state.state == "MyGroup.MySubGroup.NewGroup:spam_state"
    )


def test_group_states_names():
    assert len(MyGroup.states) == 3
    assert len(MyGroup.all_states) == 9

    assert MyGroup.states_names == ("MyGroup:state", "MyGroup:state_1", "MyGroup:state_2")
    assert MyGroup.MySubGroup.states_names == (
        "MyGroup.MySubGroup:sub_state",
        "MyGroup.MySubGroup:sub_state_1",
        "MyGroup.MySubGroup:sub_state_2",
        "custom_group:in_custom_group",
    )
    assert MyGroup.MySubGroup.NewGroup.states_names == (
        "MyGroup.MySubGroup.NewGroup:spam",
        "MyGroup.MySubGroup.NewGroup:spam_state",
    )

    assert MyGroup.all_states_names == (
        "MyGroup:state",
        "MyGroup:state_1",
        "MyGroup:state_2",
        "MyGroup.MySubGroup:sub_state",
        "MyGroup.MySubGroup:sub_state_1",
        "MyGroup.MySubGroup:sub_state_2",
        "custom_group:in_custom_group",
        "MyGroup.MySubGroup.NewGroup:spam",
        "MyGroup.MySubGroup.NewGroup:spam_state",
    )

    assert MyGroup.MySubGroup.all_states_names == (
        "MyGroup.MySubGroup:sub_state",
        "MyGroup.MySubGroup:sub_state_1",
        "MyGroup.MySubGroup:sub_state_2",
        "custom_group:in_custom_group",
        "MyGroup.MySubGroup.NewGroup:spam",
        "MyGroup.MySubGroup.NewGroup:spam_state",
    )

    assert MyGroup.MySubGroup.NewGroup.all_states_names == (
        "MyGroup.MySubGroup.NewGroup:spam",
        "MyGroup.MySubGroup.NewGroup:spam_state",
    )


def test_root_element():
    root = MyGroup.MySubGroup.NewGroup.spam.get_root()

    assert issubclass(root, StatesGroup)
    assert root == MyGroup

    assert root == MyGroup.state.get_root()
    assert root == MyGroup.MySubGroup.get_root()

    with pytest.raises(RuntimeError):
        any_state.get_root()