"""
Tests for HTTP client.
"""

import pytest
from unittest.mock import AsyncMock, patch, MagicMock
import httpx
from core.clients.http_client import HTTPClient


@pytest.fixture
def mock_httpx_response():
    """Create a mock httpx response."""
    response = MagicMock(spec=httpx.Response)
    response.status_code = 200
    response.json.return_value = {"success": True, "data": {"id": 1}}
    response.elapsed.total_seconds.return_value = 0.123
    response.raise_for_status = MagicMock()
    return response


@pytest.mark.asyncio
async def test_http_client_initialization():
    """Test HTTP client initialization."""
    client = HTTPClient(
        base_url="https://api.example.com",
        timeout=30.0,
        max_retries=3,
        headers={"Authorization": "Bearer test_token"}
    )
    
    assert client.base_url == "https://api.example.com"
    assert client.timeout == 30.0
    assert client.max_retries == 3
    assert client.default_headers["Authorization"] == "Bearer test_token"
    
    await client.close()


@pytest.mark.asyncio
async def test_http_client_get_request(mock_httpx_response):
    """Test HTTP GET request."""
    client = HTTPClient(base_url="https://api.example.com")
    
    with patch.object(client, '_get_client') as mock_get_client:
        mock_async_client = AsyncMock()
        mock_async_client.request = AsyncMock(return_value=mock_httpx_response)
        mock_get_client.return_value = mock_async_client
        
        response = await client.get("/users/1", params={"include": "profile"})
        
        assert response.status_code == 200
        data = response.json()
        assert data["success"] is True
        
        # Verify the request was made correctly
        mock_async_client.request.assert_called_once()
        call_args = mock_async_client.request.call_args
        assert call_args.kwargs["method"] == "GET"
        assert "users/1" in call_args.kwargs["url"]
        assert call_args.kwargs["params"] == {"include": "profile"}
    
    await client.close()


@pytest.mark.asyncio
async def test_http_client_post_request(mock_httpx_response):
    """Test HTTP POST request."""
    client = HTTPClient(base_url="https://api.example.com")
    
    with patch.object(client, '_get_client') as mock_get_client:
        mock_async_client = AsyncMock()
        mock_async_client.request = AsyncMock(return_value=mock_httpx_response)
        mock_get_client.return_value = mock_async_client
        
        payload = {"name": "John", "email": "john@example.com"}
        response = await client.post("/users", json=payload)
        
        assert response.status_code == 200
        
        # Verify the request
        mock_async_client.request.assert_called_once()
        call_args = mock_async_client.request.call_args
        assert call_args.kwargs["method"] == "POST"
        assert call_args.kwargs["json"] == payload
    
    await client.close()


@pytest.mark.asyncio
async def test_http_client_context_manager():
    """Test HTTP client as context manager."""
    async with HTTPClient(base_url="https://api.example.com") as client:
        assert client is not None
        assert client._client is None  # Not initialized until first use
    
    # Client should be closed after context
    assert client._client is None


@pytest.mark.asyncio
async def test_http_client_retry_on_timeout():
    """Test automatic retry on timeout."""
    client = HTTPClient(
        base_url="https://api.example.com",
        max_retries=3,
        retry_delay=0.01  # Fast retry for testing
    )
    
    with patch.object(client, '_get_client') as mock_get_client:
        mock_async_client = AsyncMock()
        
        # Simulate 2 timeouts, then success
        mock_async_client.request = AsyncMock(
            side_effect=[
                httpx.TimeoutException("Timeout 1"),
                httpx.TimeoutException("Timeout 2"),
                MagicMock(
                    status_code=200,
                    json=MagicMock(return_value={"success": True}),
                    elapsed=MagicMock(total_seconds=MagicMock(return_value=0.1)),
                    raise_for_status=MagicMock()
                )
            ]
        )
        mock_get_client.return_value = mock_async_client
        
        response = await client.get("/users")
        
        assert response.status_code == 200
        assert mock_async_client.request.call_count == 3  # 2 retries + 1 success
    
    await client.close()


@pytest.mark.asyncio
async def test_http_client_retry_exhausted():
    """Test retry exhaustion."""
    client = HTTPClient(
        base_url="https://api.example.com",
        max_retries=2,
        retry_delay=0.01
    )
    
    with patch.object(client, '_get_client') as mock_get_client:
        mock_async_client = AsyncMock()
        mock_async_client.request = AsyncMock(
            side_effect=httpx.TimeoutException("Persistent timeout")
        )
        mock_get_client.return_value = mock_async_client
        
        with pytest.raises(httpx.TimeoutException):
            await client.get("/users")
        
        assert mock_async_client.request.call_count == 2  # max_retries
    
    await client.close()


@pytest.mark.asyncio
async def test_http_client_custom_timeout():
    """Test custom timeout for individual request."""
    client = HTTPClient(base_url="https://api.example.com", timeout=30.0)
    
    with patch.object(client, '_get_client') as mock_get_client:
        mock_async_client = AsyncMock()
        mock_async_client.request = AsyncMock(
            return_value=MagicMock(
                status_code=200,
                json=MagicMock(return_value={}),
                elapsed=MagicMock(total_seconds=MagicMock(return_value=0.1)),
                raise_for_status=MagicMock()
            )
        )
        mock_get_client.return_value = mock_async_client
        
        await client.get("/users", timeout=10.0)
        
        # Verify custom timeout was used
        call_args = mock_async_client.request.call_args
        assert call_args.kwargs["timeout"] == 10.0
    
    await client.close()


@pytest.mark.asyncio
async def test_http_client_headers_merge():
    """Test header merging."""
    client = HTTPClient(
        base_url="https://api.example.com",
        headers={"Authorization": "Bearer token", "User-Agent": "TestClient/1.0"}
    )
    
    with patch.object(client, '_get_client') as mock_get_client:
        mock_async_client = AsyncMock()
        mock_async_client.request = AsyncMock(
            return_value=MagicMock(
                status_code=200,
                json=MagicMock(return_value={}),
                elapsed=MagicMock(total_seconds=MagicMock(return_value=0.1)),
                raise_for_status=MagicMock()
            )
        )
        mock_get_client.return_value = mock_async_client
        
        await client.get("/users", headers={"X-Custom": "value"})
        
        # Verify headers were merged
        call_args = mock_async_client.request.call_args
        headers = call_args.kwargs["headers"]
        assert headers["Authorization"] == "Bearer token"
        assert headers["User-Agent"] == "TestClient/1.0"
        assert headers["X-Custom"] == "value"
    
    await client.close()