import functools
from typing import Any, Dict, Union

import pytest

from aiogram.api.types import Update
from aiogram.dispatcher.event.handler import CallableMixin, FilterObject, HandlerObject
from aiogram.dispatcher.filters import Text
from aiogram.dispatcher.filters.base import BaseFilter
from aiogram.dispatcher.handler.base import BaseHandler


def callback1(foo: int, bar: int, baz: int):
    return locals()


async def callback2(foo: int, bar: int, baz: int):
    return locals()


async def callback3(foo: int, **kwargs):
    return locals()


class Filter(BaseFilter):
    async def __call__(self, foo: int, bar: int, baz: int) -> Union[bool, Dict[str, Any]]:
        return locals()


class SyncCallable:
    def __call__(self, foo, bar, baz):
        return locals()


class TestCallableMixin:
    @pytest.mark.parametrize("callback", [callback2, Filter()])
    def test_init_awaitable(self, callback):
        obj = CallableMixin(callback)
        assert obj.awaitable
        assert obj.callback == callback

    @pytest.mark.parametrize("callback", [callback1, SyncCallable()])
    def test_init_not_awaitable(self, callback):
        obj = CallableMixin(callback)
        assert not obj.awaitable
        assert obj.callback == callback

    @pytest.mark.parametrize(
        "callback,args",
        [
            pytest.param(callback1, {"foo", "bar", "baz"}),
            pytest.param(callback2, {"foo", "bar", "baz"}),
            pytest.param(callback3, {"foo"}),
            pytest.param(Filter(), {"self", "foo", "bar", "baz"}),
            pytest.param(SyncCallable(), {"self", "foo", "bar", "baz"}),
        ],
    )
    def test_init_args_spec(self, callback, args):
        obj = CallableMixin(callback)
        assert set(obj.spec.args) == args

    def test_init_decorated(self):
        def decorator(func):
            @functools.wraps(func)
            def wrapper(*args, **kwargs):
                return func(*args, **kwargs)

            return wrapper

        @decorator
        def callback1(foo, bar, baz):
            pass

        @decorator
        @decorator
        def callback2(foo, bar, baz):
            pass

        obj1 = CallableMixin(callback1)
        obj2 = CallableMixin(callback2)

        assert set(obj1.spec.args) == {"foo", "bar", "baz"}
        assert obj1.callback == callback1
        assert set(obj2.spec.args) == {"foo", "bar", "baz"}
        assert obj2.callback == callback2

    @pytest.mark.parametrize(
        "callback,kwargs,result",
        [
            pytest.param(
                callback1, {"foo": 42, "spam": True, "baz": "fuz"}, {"foo": 42, "baz": "fuz"}
            ),
            pytest.param(
                callback2,
                {"foo": 42, "spam": True, "baz": "fuz", "bar": "test"},
                {"foo": 42, "baz": "fuz", "bar": "test"},
            ),
            pytest.param(
                callback3,
                {"foo": 42, "spam": True, "baz": "fuz", "bar": "test"},
                {"foo": 42, "spam": True, "baz": "fuz", "bar": "test"},
            ),
            pytest.param(
                Filter(), {"foo": 42, "spam": True, "baz": "fuz"}, {"foo": 42, "baz": "fuz"}
            ),
            pytest.param(
                SyncCallable(), {"foo": 42, "spam": True, "baz": "fuz"}, {"foo": 42, "baz": "fuz"}
            ),
        ],
    )
    def test_prepare_kwargs(self, callback, kwargs, result):
        obj = CallableMixin(callback)
        assert obj._prepare_kwargs(kwargs) == result

    @pytest.mark.asyncio
    async def test_sync_call(self):
        obj = CallableMixin(callback1)

        result = await obj.call(foo=42, bar="test", baz="fuz", spam=True)
        assert result == {"foo": 42, "bar": "test", "baz": "fuz"}

    @pytest.mark.asyncio
    async def test_async_call(self):
        obj = CallableMixin(callback2)

        result = await obj.call(foo=42, bar="test", baz="fuz", spam=True)
        assert result == {"foo": 42, "bar": "test", "baz": "fuz"}


async def simple_handler(*args, **kwargs):
    return args, kwargs


class TestHandlerObject:
    @pytest.mark.asyncio
    async def test_check_with_bool_result(self):
        handler = HandlerObject(simple_handler, [FilterObject(lambda value: True)] * 3)
        result, data = await handler.check(42, foo=True)
        assert result
        assert data == {"foo": True}

    @pytest.mark.asyncio
    async def test_check_with_dict_result(self):
        handler = HandlerObject(
            simple_handler,
            [
                FilterObject(
                    functools.partial(lambda value, index: {f"test{index}": "ok"}, index=item)
                )
                for item in range(3)
            ],
        )
        result, data = await handler.check(42, foo=True)
        assert result
        assert data == {"foo": True, "test0": "ok", "test1": "ok", "test2": "ok"}

    @pytest.mark.asyncio
    async def test_check_with_combined_result(self):
        handler = HandlerObject(
            simple_handler,
            [FilterObject(lambda value: True), FilterObject(lambda value: {"test": value})],
        )
        result, data = await handler.check(42, foo=True)
        assert result
        assert data == {"foo": True, "test": 42}

    @pytest.mark.asyncio
    async def test_check_rejected(self):
        handler = HandlerObject(simple_handler, [FilterObject(lambda value: False)])
        result, data = await handler.check(42, foo=True)
        assert not result

    @pytest.mark.asyncio
    async def test_check_partial_rejected(self):
        handler = HandlerObject(
            simple_handler, [FilterObject(lambda value: True), FilterObject(lambda value: False)]
        )
        result, data = await handler.check(42, foo=True)
        assert not result

    @pytest.mark.asyncio
    async def test_class_based_handler(self):
        class MyHandler(BaseHandler):
            event: Update

            async def handle(self) -> Any:
                return self.event.update_id

        handler = HandlerObject(MyHandler, filters=[FilterObject(lambda event: True)])

        assert handler.awaitable
        assert handler.callback == MyHandler
        assert len(handler.filters) == 1
        result = await handler.call(Update(update_id=42))
        assert result == 42