"""
Unit tests for async API client
Test async HTTP operations, retry logic, and error handling
"""

import pytest
import aiohttp
from unittest.mock import AsyncMock, patch, MagicMock
import asyncio

import sys
from pathlib import Path
sys.path.insert(0, str(Path(__file__).parent.parent))

from utils.async_api_client import AsyncAPIClient, safe_api_call, parallel_api_calls


@pytest.mark.asyncio
class TestAsyncAPIClient:
    """Test AsyncAPIClient class"""

    async def test_client_initialization(self):
        """Test client initialization with context manager"""
        async with AsyncAPIClient() as client:
            assert client._session is not None
            assert isinstance(client._session, aiohttp.ClientSession)

    async def test_successful_get_request(self):
        """Test successful GET request"""
        mock_response_data = {"status": "success", "data": "test"}

        async with AsyncAPIClient() as client:
            with patch.object(
                client._session,
                'get',
                return_value=AsyncMock(
                    json=AsyncMock(return_value=mock_response_data),
                    raise_for_status=MagicMock(),
                    __aenter__=AsyncMock(),
                    __aexit__=AsyncMock()
                )
            ):
                result = await client.get("https://api.example.com/data")
                # Note: This test structure needs adjustment based on actual mock implementation

    async def test_retry_on_timeout(self):
        """Test retry logic on timeout"""
        async with AsyncAPIClient(max_retries=3, retry_delay=0.1) as client:
            # Mock timeout errors
            client._session.get = AsyncMock(side_effect=asyncio.TimeoutError())

            result = await client.get("https://api.example.com/data")

            # Should return None after max retries
            assert result is None
            # Should have tried max_retries times
            assert client._session.get.call_count == 3

    async def test_retry_on_server_error(self):
        """Test retry on 5xx server errors"""
        # This test would mock server errors and verify retry behavior
        pass

    async def test_no_retry_on_client_error(self):
        """Test that client errors (4xx) don't trigger retries"""
        # Mock 404 error and verify only one attempt
        pass

    async def test_parallel_requests(self):
        """Test parallel request execution"""
        urls = [
            "https://api.example.com/endpoint1",
            "https://api.example.com/endpoint2",
            "https://api.example.com/endpoint3"
        ]

        async with AsyncAPIClient() as client:
            # Mock successful responses
            mock_data = [{"id": i} for i in range(len(urls))]

            # Test parallel execution
            # Results should be returned in order
            pass


@pytest.mark.asyncio
class TestConvenienceFunctions:
    """Test convenience functions"""

    async def test_safe_api_call(self):
        """Test safe_api_call convenience function"""
        # Test successful call
        with patch('utils.async_api_client.AsyncAPIClient') as MockClient:
            mock_instance = MockClient.return_value.__aenter__.return_value
            mock_instance.get = AsyncMock(return_value={"success": True})

            result = await safe_api_call("https://api.example.com/test")
            # Verify result

    async def test_parallel_api_calls(self):
        """Test parallel_api_calls convenience function"""
        urls = ["https://api.example.com/1", "https://api.example.com/2"]

        with patch('utils.async_api_client.AsyncAPIClient') as MockClient:
            mock_instance = MockClient.return_value.__aenter__.return_value
            mock_instance.gather_requests = AsyncMock(
                return_value=[{"id": 1}, {"id": 2}]
            )

            results = await parallel_api_calls(urls)
            # Verify results


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