from __future__ import annotations

from unittest.mock import AsyncMock, MagicMock, patch

import pytest

from yuxi.channels.adapters.nostr.nip05 import verify_nip05


class AsyncContextManagerMock:
    def __init__(self, return_value=None):
        self.return_value = return_value

    async def __aenter__(self):
        return self.return_value

    async def __aexit__(self, *args, **kwargs):
        pass


class TestNip05:
    @pytest.fixture
    def mock_session_factory(self):
        pubkey_hex = "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6"

        async def json_response():
            return {"names": {"alice": pubkey_hex, "eve": pubkey_hex}}

        mock_resp = MagicMock()
        mock_resp.status = 200
        mock_resp.json = json_response

        mock_get_cm = AsyncContextManagerMock(return_value=mock_resp)

        mock_session = AsyncContextManagerMock()
        mock_session.return_value = mock_session
        mock_session.get = MagicMock(return_value=mock_get_cm)
        return mock_session

    @pytest.mark.asyncio
    async def test_verify_valid(self, mock_session_factory):
        pubkey_hex = "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6"
        with patch("aiohttp.ClientSession", return_value=mock_session_factory):
            result = await verify_nip05("alice@example.com", pubkey_hex)
            assert result is True

    @pytest.mark.asyncio
    async def test_verify_no_at_sign(self):
        result = await verify_nip05("invalid_name", "some_pubkey_hex")
        assert result is False

    @pytest.mark.asyncio
    async def test_verify_http_error(self):
        pubkey_hex = "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6"
        mock_resp = MagicMock()
        mock_resp.status = 404

        mock_get_cm = AsyncContextManagerMock(return_value=mock_resp)
        mock_session = AsyncContextManagerMock()
        mock_session.return_value = mock_session
        mock_session.get = MagicMock(return_value=mock_get_cm)

        with patch("aiohttp.ClientSession", return_value=mock_session):
            result = await verify_nip05("alice@example.com", pubkey_hex)
            assert result is False

    @pytest.mark.asyncio
    async def test_verify_network_error(self):
        pubkey_hex = "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6"

        mock_session = AsyncContextManagerMock()
        mock_session.return_value = mock_session
        mock_session.get = MagicMock(side_effect=Exception("Network error"))

        with patch("aiohttp.ClientSession", return_value=mock_session):
            result = await verify_nip05("bob@example.com", pubkey_hex)
            assert result is False

    @pytest.mark.asyncio
    async def test_verify_name_not_found(self):
        pubkey_hex = "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6"

        async def json_empty():
            return {"names": {}}

        mock_resp = MagicMock()
        mock_resp.status = 200
        mock_resp.json = json_empty

        mock_get_cm = AsyncContextManagerMock(return_value=mock_resp)
        mock_session = AsyncContextManagerMock()
        mock_session.return_value = mock_session
        mock_session.get = MagicMock(return_value=mock_get_cm)

        with patch("aiohttp.ClientSession", return_value=mock_session):
            result = await verify_nip05("charlie@example.com", pubkey_hex)
            assert result is False

    @pytest.mark.asyncio
    async def test_verify_pubkey_mismatch(self):
        async def json_mismatch():
            return {"names": {"dave": "different_pubkey_hex"}}

        mock_resp = MagicMock()
        mock_resp.status = 200
        mock_resp.json = json_mismatch

        mock_get_cm = AsyncContextManagerMock(return_value=mock_resp)
        mock_session = AsyncContextManagerMock()
        mock_session.return_value = mock_session
        mock_session.get = MagicMock(return_value=mock_get_cm)

        with patch("aiohttp.ClientSession", return_value=mock_session):
            result = await verify_nip05("dave@example.com", "expected_pubkey")
            assert result is False

    @pytest.mark.asyncio
    async def test_verify_case_insensitive_pubkey_match(self, mock_session_factory):
        pubkey_hex = "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6"
        with patch("aiohttp.ClientSession", return_value=mock_session_factory):
            result = await verify_nip05("eve@example.com", pubkey_hex)
            assert result is True