"""Integration tests for network failure and timeout scenarios."""

from unittest.mock import AsyncMock, Mock

import httpx
import pytest

from unifi_mcp.clients.base_client import BaseUniFiClient
from unifi_mcp.clients.network_client import NetworkClient


class TestNetworkReconnection:
    """Test network reconnection scenarios."""

    async def test_auto_reconnect_after_connection_loss(self):
        """Test automatic reconnection after connection loss."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
        )

        # First call succeeds
        mock_response_1 = Mock()
        mock_response_1.json.return_value = {"status": "success"}
        mock_response_1.raise_for_status.return_value = None
        mock_response_1.status_code = 200
        mock_response_1.text = ""

        # Second call gets 401 (connection lost)
        mock_response_401 = Mock()
        mock_response_401.status_code = 401
        mock_response_401.text = "Login required"

        # After re-auth, request succeeds again
        mock_response_2 = Mock()
        mock_response_2.json.return_value = {"status": "success"}
        mock_response_2.raise_for_status.return_value = None
        mock_response_2.status_code = 200
        mock_response_2.text = ""

        client.client.request = AsyncMock(
            side_effect=[mock_response_1, mock_response_401, mock_response_2]
        )
        client.authenticate = AsyncMock(return_value=True)
        client._authenticated = True

        # First request
        result1 = await client._make_request("GET", "/api/test1")
        assert result1 == {"status": "success"}
        # No initial auth since _authenticated=True already set
        assert client.authenticate.call_count == 0

        # Second request (triggers re-auth)
        result2 = await client._make_request("GET", "/api/test2")
        assert result2 == {"status": "success"}
        assert client.authenticate.call_count == 1  # Re-auth after 401

    async def test_reconnection_after_server_restart(self):
        """Test behavior when server is restarted."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
        )

        # Simulate server restart - connection reset
        client.client.request = AsyncMock(
            side_effect=[
                httpx.RemoteProtocolError("Connection reset"),
                Mock(
                    json=Mock(return_value={"status": "success"}),
                    raise_for_status=Mock(return_value=None),
                    status_code=200,
                    text="",
                ),
            ]
        )
        client.authenticate = AsyncMock(return_value=True)
        client._authenticated = True

        # First attempt fails with connection reset
        with pytest.raises(httpx.RemoteProtocolError):
            await client._make_request("GET", "/api/test")

    async def test_intermittent_network_failures(self):
        """Test handling of intermittent network failures."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
        )

        success_response = Mock()
        success_response.json.return_value = {"status": "success"}
        success_response.raise_for_status.return_value = None
        success_response.status_code = 200
        success_response.text = ""

        timeout_response = Mock()
        timeout_response.status_code = 408
        timeout_response.text = "Request Timeout"
        timeout_response.raise_for_status.side_effect = httpx.HTTPStatusError(
            "Request Timeout", request=Mock(), response=timeout_response
        )

        # Mix of successes and failures
        responses = [
            success_response,  # Success
            timeout_response,  # Timeout
            success_response,  # Success after retry
            success_response,  # Success
        ]

        client.client.request = AsyncMock(side_effect=responses)
        client._authenticated = True

        # First request succeeds
        result1 = await client._make_request("GET", "/api/test1")
        assert result1 == {"status": "success"}

        # Second request times out
        with pytest.raises(httpx.HTTPStatusError):
            await client._make_request("GET", "/api/test2")


class TestTimeoutScenarios:
    """Test various timeout scenarios."""

    async def test_read_timeout(self):
        """Test read timeout (server takes too long to respond)."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
            timeout=1,  # 1 second timeout
        )

        client._authenticated = True

        # Mock read timeout
        client.client.request = AsyncMock(
            side_effect=httpx.ReadTimeout("Server did not respond in time")
        )

        with pytest.raises(httpx.ReadTimeout):
            await client._make_request("GET", "/api/test")

    async def test_write_timeout(self):
        """Test write timeout (cannot send request)."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
            timeout=1,
        )

        client._authenticated = True

        # Mock write timeout
        client.client.request = AsyncMock(
            side_effect=httpx.WriteTimeout("Could not send request in time")
        )

        with pytest.raises(httpx.WriteTimeout):
            await client._make_request("POST", "/api/test", data={"key": "value"})

    async def test_timeout_with_large_response(self):
        """Test timeout when receiving large response."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
            timeout=1,
        )

        client._authenticated = True

        # Mock timeout during large response
        client.client.request = AsyncMock(
            side_effect=httpx.ReadTimeout("Timeout reading large response")
        )

        with pytest.raises(httpx.ReadTimeout):
            await client._make_request("GET", "/api/test")


class TestSlowNetworkConditions:
    """Test behavior under slow network conditions."""

    async def test_slow_response_handling(self):
        """Test handling of slow but successful responses."""
        import asyncio

        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
            timeout=10,  # Long enough timeout
        )

        client._authenticated = True

        async def slow_request(*args, **kwargs):
            await asyncio.sleep(0.1)  # Simulate slow network
            response = Mock()
            response.json.return_value = {"status": "success"}
            response.raise_for_status.return_value = None
            response.status_code = 200
            response.text = ""
            return response

        client.client.request = slow_request

        result = await client._make_request("GET", "/api/test")
        assert result == {"status": "success"}

    async def test_very_slow_response_timeout(self):
        """Test timeout for very slow responses."""
        import asyncio

        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
            timeout=0.1,  # Very short timeout
        )

        client._authenticated = True

        async def very_slow_request(*args, **kwargs):
            await asyncio.sleep(1)  # Simulate very slow network
            raise httpx.TimeoutException("Request timed out")

        client.client.request = very_slow_request

        with pytest.raises(httpx.TimeoutException):
            await client._make_request("GET", "/api/test")


class TestConcurrentFailures:
    """Test concurrent request failures."""

    async def test_multiple_concurrent_timeouts(self):
        """Test handling of multiple concurrent timeouts."""
        import asyncio

        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
            timeout=0.1,
        )

        client._authenticated = True

        async def timeout_request(*args, **kwargs):
            await asyncio.sleep(1)
            raise httpx.TimeoutException("Request timed out")

        client.client.request = timeout_request

        # Launch multiple concurrent requests
        tasks = [client._make_request("GET", f"/api/test{i}") for i in range(5)]

        results = await asyncio.gather(*tasks, return_exceptions=True)

        # All should timeout
        assert all(isinstance(r, httpx.TimeoutException) for r in results)

    async def test_concurrent_mixed_success_failure(self):
        """Test concurrent requests with mixed success/failure."""
        import asyncio

        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
        )

        client._authenticated = True

        call_count = 0

        async def mixed_request(*args, **kwargs):
            nonlocal call_count
            call_count += 1
            if call_count % 2 == 0:
                # Even calls succeed
                response = Mock()
                response.json.return_value = {"status": "success"}
                response.raise_for_status.return_value = None
                response.status_code = 200
                response.text = ""
                return response
            else:
                # Odd calls fail
                raise httpx.TimeoutException("Timeout")

        client.client.request = mixed_request

        # Launch multiple concurrent requests
        tasks = [client._make_request("GET", f"/api/test{i}") for i in range(10)]

        results = await asyncio.gather(*tasks, return_exceptions=True)

        # Half should succeed, half should fail
        successes = sum(1 for r in results if not isinstance(r, Exception))
        failures = sum(1 for r in results if isinstance(r, Exception))

        assert successes == 5
        assert failures == 5


class TestPersistentConnectionIssues:
    """Test persistent connection issues."""

    async def test_broken_pipe(self):
        """Test handling of broken pipe errors."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
        )

        client._authenticated = True

        # Mock broken pipe error
        client.client.request = AsyncMock(
            side_effect=httpx.RemoteProtocolError("Broken pipe")
        )

        with pytest.raises(httpx.RemoteProtocolError):
            await client._make_request("GET", "/api/test")

    async def test_connection_reset_by_peer(self):
        """Test handling of connection reset by peer."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
        )

        client._authenticated = True

        # Mock connection reset
        client.client.request = AsyncMock(
            side_effect=httpx.RemoteProtocolError("Connection reset by peer")
        )

        with pytest.raises(httpx.RemoteProtocolError):
            await client._make_request("GET", "/api/test")


class TestSSLHandshakeFailures:
    """Test SSL handshake failures."""

    async def test_ssl_handshake_timeout(self):
        """Test SSL handshake timeout."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
            timeout=1,
        )

        client._authenticated = True

        # Mock SSL handshake timeout
        client.client.request = AsyncMock(
            side_effect=httpx.ConnectTimeout("SSL handshake timeout")
        )

        with pytest.raises(httpx.ConnectTimeout):
            await client._make_request("GET", "/api/test")

    async def test_ssl_certificate_mismatch(self):
        """Test SSL certificate hostname mismatch."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
            verify_ssl=True,
        )

        client._authenticated = True

        # Mock certificate verification error
        client.client.request = AsyncMock(
            side_effect=httpx.HTTPStatusError(
                "Certificate does not match hostname",
                request=Mock(),
                response=Mock(status_code=0),
            )
        )

        with pytest.raises(httpx.HTTPStatusError):
            await client._make_request("GET", "/api/test")


class TestProxyIssues:
    """Test proxy-related issues."""

    async def test_proxy_connection_failure(self):
        """Test proxy connection failure."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
        )

        client._authenticated = True

        # Mock proxy connection error
        client.client.request = AsyncMock(
            side_effect=httpx.NetworkError("Cannot connect to proxy")
        )

        with pytest.raises(httpx.NetworkError):
            await client._make_request("GET", "/api/test")

    async def test_proxy_timeout(self):
        """Test proxy timeout."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
            timeout=1,
        )

        client._authenticated = True

        # Mock proxy timeout
        client.client.request = AsyncMock(
            side_effect=httpx.ConnectTimeout("Proxy timeout")
        )

        with pytest.raises(httpx.ConnectTimeout):
            await client._make_request("GET", "/api/test")


class TestResourceLimitations:
    """Test resource limitation scenarios."""

    async def test_too_many_open_files(self):
        """Test handling of too many open files error."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
        )

        client._authenticated = True

        # Mock too many open files error
        client.client.request = AsyncMock(
            side_effect=OSError("Too many open files")
        )

        with pytest.raises(OSError):
            await client._make_request("GET", "/api/test")

    async def test_out_of_memory_error(self):
        """Test handling of out of memory error."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
        )

        client._authenticated = True

        # Mock out of memory error
        client.client.request = AsyncMock(side_effect=MemoryError("Out of memory"))

        with pytest.raises(MemoryError):
            await client._make_request("GET", "/api/test")


class TestKeepAliveIssues:
    """Test HTTP keep-alive issues."""

    async def test_keep_alive_timeout(self):
        """Test keep-alive connection timeout."""
        client = BaseUniFiClient(
            host="unifi.example.com",
            port=8443,
            username="admin",
            password="password123",
        )

        # First request succeeds
        response_1 = Mock()
        response_1.json.return_value = {"status": "success"}
        response_1.raise_for_status.return_value = None
        response_1.status_code = 200
        response_1.text = ""

        # Second request fails with keep-alive timeout
        response_2 = Mock()
        response_2.status_code = 408
        response_2.text = "Keep-alive timeout"
        response_2.raise_for_status.side_effect = httpx.HTTPStatusError(
            "Keep-alive timeout", request=Mock(), response=response_2
        )

        client.client.request = AsyncMock(side_effect=[response_1, response_2])
        client._authenticated = True

        # First request succeeds
        result1 = await client._make_request("GET", "/api/test1")
        assert result1 == {"status": "success"}

        # Second request fails
        with pytest.raises(httpx.HTTPStatusError):
            await client._make_request("GET", "/api/test2")


if __name__ == "__main__":
    pytest.main([__file__, "-v"])
