"""Tests for OpenRouter service.

T28: Test API key validation with OpenRouter API.
"""
import pytest
from unittest.mock import AsyncMock, MagicMock, patch
import httpx


class TestValidateApiKey:
    """Tests for validate_api_key function."""

    @pytest.mark.asyncio
    async def test_validate_api_key_success(self):
        """Test successful API key validation."""
        from openrouter_monitor.services.openrouter import validate_api_key
        
        # Mock successful response
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {
            "data": {
                "label": "Test Key",
                "usage": 0,
                "limit": 100,
                "is_free_tier": True
            }
        }
        
        with patch('httpx.AsyncClient.get', return_value=mock_response):
            result = await validate_api_key("sk-or-v1-test-key")
        
        assert result is True

    @pytest.mark.asyncio
    async def test_validate_api_key_invalid(self):
        """Test invalid API key returns False."""
        from openrouter_monitor.services.openrouter import validate_api_key
        
        # Mock 401 Unauthorized response
        mock_response = MagicMock()
        mock_response.status_code = 401
        mock_response.text = "Unauthorized"
        
        with patch('httpx.AsyncClient.get', return_value=mock_response):
            result = await validate_api_key("sk-or-v1-invalid-key")
        
        assert result is False

    @pytest.mark.asyncio
    async def test_validate_api_key_timeout(self):
        """Test timeout returns False."""
        from openrouter_monitor.services.openrouter import validate_api_key
        
        with patch('httpx.AsyncClient.get', side_effect=httpx.TimeoutException("Connection timed out")):
            result = await validate_api_key("sk-or-v1-test-key")
        
        assert result is False

    @pytest.mark.asyncio
    async def test_validate_api_key_network_error(self):
        """Test network error returns False."""
        from openrouter_monitor.services.openrouter import validate_api_key
        
        with patch('httpx.AsyncClient.get', side_effect=httpx.NetworkError("Connection failed")):
            result = await validate_api_key("sk-or-v1-test-key")
        
        assert result is False

    @pytest.mark.asyncio
    async def test_validate_api_key_uses_correct_headers(self):
        """Test that correct headers are sent to OpenRouter."""
        from openrouter_monitor.services.openrouter import validate_api_key, OPENROUTER_AUTH_URL
        
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {"data": {"usage": 0}}
        
        with patch('httpx.AsyncClient.get', return_value=mock_response) as mock_get:
            await validate_api_key("sk-or-v1-test-key")
            
            # Verify correct URL and headers
            mock_get.assert_called_once()
            call_args = mock_get.call_args
            assert call_args[0][0] == OPENROUTER_AUTH_URL
            assert "Authorization" in call_args[1]["headers"]
            assert call_args[1]["headers"]["Authorization"] == "Bearer sk-or-v1-test-key"

    @pytest.mark.asyncio
    async def test_validate_api_key_uses_10s_timeout(self):
        """Test that request uses 10 second timeout."""
        from openrouter_monitor.services.openrouter import validate_api_key
        
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = {"data": {"usage": 0}}
        
        with patch('httpx.AsyncClient.get', return_value=mock_response) as mock_get:
            await validate_api_key("sk-or-v1-test-key")
            
            # Verify timeout is set to 10 seconds
            call_kwargs = mock_get.call_args[1]
            assert call_kwargs.get("timeout") == 10.0


class TestGetKeyInfo:
    """Tests for get_key_info function."""

    @pytest.mark.asyncio
    async def test_get_key_info_success(self):
        """Test successful key info retrieval."""
        from openrouter_monitor.services.openrouter import get_key_info
        
        expected_data = {
            "data": {
                "label": "Test Key",
                "usage": 50,
                "limit": 100,
                "is_free_tier": False
            }
        }
        
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.return_value = expected_data
        
        with patch('httpx.AsyncClient.get', return_value=mock_response):
            result = await get_key_info("sk-or-v1-test-key")
        
        assert result == expected_data["data"]

    @pytest.mark.asyncio
    async def test_get_key_info_invalid_key(self):
        """Test invalid key returns None."""
        from openrouter_monitor.services.openrouter import get_key_info
        
        mock_response = MagicMock()
        mock_response.status_code = 401
        mock_response.text = "Unauthorized"
        
        with patch('httpx.AsyncClient.get', return_value=mock_response):
            result = await get_key_info("sk-or-v1-invalid-key")
        
        assert result is None

    @pytest.mark.asyncio
    async def test_get_key_info_timeout(self):
        """Test timeout returns None."""
        from openrouter_monitor.services.openrouter import get_key_info
        
        with patch('httpx.AsyncClient.get', side_effect=httpx.TimeoutException("Connection timed out")):
            result = await get_key_info("sk-or-v1-test-key")
        
        assert result is None

    @pytest.mark.asyncio
    async def test_get_key_info_network_error(self):
        """Test network error returns None."""
        from openrouter_monitor.services.openrouter import get_key_info
        
        with patch('httpx.AsyncClient.get', side_effect=httpx.NetworkError("Connection failed")):
            result = await get_key_info("sk-or-v1-test-key")
        
        assert result is None

    @pytest.mark.asyncio
    async def test_get_key_info_malformed_response(self):
        """Test malformed JSON response returns None."""
        from openrouter_monitor.services.openrouter import get_key_info
        
        mock_response = MagicMock()
        mock_response.status_code = 200
        mock_response.json.side_effect = ValueError("Invalid JSON")
        
        with patch('httpx.AsyncClient.get', return_value=mock_response):
            result = await get_key_info("sk-or-v1-test-key")
        
        assert result is None


class TestOpenRouterConstants:
    """Tests for OpenRouter constants."""

    def test_openrouter_auth_url_defined(self):
        """Test that OPENROUTER_AUTH_URL is defined."""
        from openrouter_monitor.services.openrouter import OPENROUTER_AUTH_URL
        
        assert OPENROUTER_AUTH_URL == "https://openrouter.ai/api/v1/auth/key"

    def test_openrouter_timeout_defined(self):
        """Test that TIMEOUT_SECONDS is defined."""
        from openrouter_monitor.services.openrouter import TIMEOUT_SECONDS
        
        assert TIMEOUT_SECONDS == 10.0