import os
import pytest
from datetime import datetime
from unittest.mock import AsyncMock, patch
from src.crawlers.dto import NewsItemDTO
from src.processor.dto import EnrichedNewsItemDTO
from src.processor.ollama_provider import OllamaProvider

@pytest.fixture
def sample_news_item():
    return NewsItemDTO(
        title="Test News",
        url="http://example.com",
        content_text="This is a test article about AI and NPU acceleration.",
        source="Test Source",
        timestamp=datetime.now()
    )

def create_mock_session(mock_response_json):
    class MockResponse:
        async def __aenter__(self):
            return self
        async def __aexit__(self, exc_type, exc_val, exc_tb):
            pass
        async def json(self):
            return mock_response_json
        def raise_for_status(self):
            pass

    class MockSession:
        async def __aenter__(self):
            return self
        async def __aexit__(self, exc_type, exc_val, exc_tb):
            pass
        def post(self, url, **kwargs):
            return MockResponse()
    
    return MockSession()

@pytest.mark.asyncio
async def test_ollama_provider_analyze_success(sample_news_item):
    os.environ['OLLAMA_API_URL'] = 'http://localhost:11434/api/generate'
    mock_response_json = {
        "response": '{"relevance_score": 8, "summary_ru": "Тестовая статья про ИИ.", "anomalies_detected": ["NPU acceleration"], "category": "Edge AI"}'
    }

    provider = OllamaProvider()
    with patch('aiohttp.ClientSession', return_value=create_mock_session(mock_response_json)):
        result = await provider.analyze(sample_news_item)
        
        assert isinstance(result, EnrichedNewsItemDTO)
        assert result.title == "Test News"
        assert result.relevance_score == 8
        assert result.summary_ru == "Тестовая статья про ИИ."
        assert result.anomalies_detected == ["NPU acceleration"]
        assert result.category == "Edge AI"

@pytest.mark.asyncio
async def test_ollama_provider_analyze_empty_response(sample_news_item):
    os.environ['OLLAMA_API_URL'] = 'http://localhost:11434/api/generate'
    mock_response_json = {
        "response": ""
    }

    provider = OllamaProvider()
    with patch('aiohttp.ClientSession', return_value=create_mock_session(mock_response_json)):
        result = await provider.analyze(sample_news_item)
        
        assert isinstance(result, EnrichedNewsItemDTO)
        assert result.relevance_score == 0
        assert result.summary_ru == ""
        assert result.anomalies_detected == []
        assert result.category == "Other"

@pytest.mark.asyncio
async def test_ollama_provider_analyze_malformed_json(sample_news_item):
    os.environ['OLLAMA_API_URL'] = 'http://localhost:11434/api/generate'
    mock_response_json = {
        "response": "{ invalid json"
    }

    provider = OllamaProvider()
    with patch('aiohttp.ClientSession', return_value=create_mock_session(mock_response_json)):
        result = await provider.analyze(sample_news_item)
        
        assert isinstance(result, EnrichedNewsItemDTO)
        assert result.relevance_score == 0
        assert "Error parsing LLM response" in result.summary_ru
        assert result.anomalies_detected == []
        assert result.category == "Other"

@pytest.mark.asyncio
async def test_ollama_provider_analyze_markdown_json(sample_news_item):
    os.environ['OLLAMA_API_URL'] = 'http://localhost:11434/api/generate'
    mock_response_json = {
        "response": "```json\n{\"relevance_score\": 5, \"summary_ru\": \"Markdown test\", \"anomalies_detected\": [], \"category\": \"Browsers\"}\n```"
    }

    provider = OllamaProvider()
    with patch('aiohttp.ClientSession', return_value=create_mock_session(mock_response_json)):
        result = await provider.analyze(sample_news_item)
        
        assert isinstance(result, EnrichedNewsItemDTO)
        assert result.relevance_score == 5
        assert result.summary_ru == "Markdown test"
        assert result.anomalies_detected == []
        assert result.category == "Browsers"