"""Tests for I2Ping — TDD: tests before implementation."""

import pytest

from i2p_apps.i2ptunnel.ping import PingResult


class TestPingResult:
    def test_reachable(self):
        r = PingResult(destination="test.i2p", reachable=True, rtt_ms=150.5)
        assert r.reachable is True
        assert r.rtt_ms == 150.5
        assert r.error is None

    def test_unreachable(self):
        r = PingResult(destination="test.i2p", reachable=False, error="timeout")
        assert r.reachable is False
        assert r.rtt_ms is None
        assert r.error == "timeout"

    def test_str_reachable(self):
        r = PingResult(destination="test.i2p", reachable=True, rtt_ms=100.0)
        s = str(r)
        assert "test.i2p" in s
        assert "100.0" in s

    def test_str_unreachable(self):
        r = PingResult(destination="test.i2p", reachable=False, error="timeout")
        s = str(r)
        assert "unreachable" in s.lower() or "timeout" in s.lower()


class TestPingFunction:
    @pytest.mark.asyncio
    async def test_ping_returns_result(self):
        """i2p_ping should return a PingResult."""
        from i2p_apps.i2ptunnel.ping import i2p_ping

        class MockSession:
            async def connect(self, dest):
                import asyncio
                r = asyncio.StreamReader()
                r.feed_eof()
                class W:
                    def close(self): pass
                    async def wait_closed(self): pass
                return r, W()

        result = await i2p_ping(MockSession(), "test.i2p", timeout=5.0)
        assert isinstance(result, PingResult)
        assert result.reachable is True
        assert result.rtt_ms is not None