"""
Service Integration Tests

Tests for API, AI, and visualization microservices.
Verifies service health, endpoints, and inter-service communication.
"""

import pytest
import json
from typing import Dict, Any


class TestMainAPIService:
    """Tests for main API service with C tools integration."""
    
    def test_api_health_check(self, api_client):
        """Test main API health check endpoint."""
        response = api_client.get("/health")
        assert response.status_code == 200
        data = response.json()
        assert data["status"] in ["healthy", "ok"]
        assert "tools" in data or "message" in data
    
    def test_api_root_endpoint(self, api_client):
        """Test main API root endpoint."""
        response = api_client.get("/")
        assert response.status_code == 200
        data = response.json()
        assert data["name"] == "Tikker API"
        assert "version" in data
        assert "endpoints" in data
    
    def test_get_daily_stats(self, api_client):
        """Test daily statistics endpoint."""
        response = api_client.get("/api/stats/daily")
        assert response.status_code in [200, 503]
        if response.status_code == 200:
            data = response.json()
            assert "presses" in data or "status" in data
    
    def test_get_top_words(self, api_client):
        """Test top words endpoint."""
        response = api_client.get("/api/words/top?limit=10")
        assert response.status_code in [200, 503]
        if response.status_code == 200:
            data = response.json()
            assert isinstance(data, list) or isinstance(data, dict)
    
    def test_decode_file_endpoint(self, api_client):
        """Test file decoding endpoint."""
        payload = {
            "input_file": "test_input.txt",
            "output_file": "test_output.txt",
            "verbose": False
        }
        response = api_client.post("/api/decode", json=payload)
        assert response.status_code in [200, 400, 404, 503]
    
    def test_api_health_timeout(self, api_client):
        """Test API health endpoint response time."""
        import time
        start = time.time()
        response = api_client.get("/health")
        elapsed = time.time() - start
        assert elapsed < 5.0
        assert response.status_code == 200


class TestAIService:
    """Tests for AI microservice."""
    
    def test_ai_health_check(self, ai_client):
        """Test AI service health check."""
        response = ai_client.get("/health")
        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "healthy"
        assert "ai_available" in data
    
    def test_ai_root_endpoint(self, ai_client):
        """Test AI service root endpoint."""
        response = ai_client.get("/")
        assert response.status_code == 200
        data = response.json()
        assert data["name"] == "Tikker AI Service"
        assert "endpoints" in data
    
    def test_ai_analyze_endpoint(self, ai_client):
        """Test AI text analysis endpoint."""
        payload = {
            "text": "This is a test message for analysis",
            "analysis_type": "general"
        }
        response = ai_client.post("/analyze", json=payload)
        assert response.status_code in [200, 503]
    
    def test_ai_analyze_activity(self, ai_client):
        """Test AI activity analysis."""
        payload = {
            "text": "typing keyboard input keystroke logs",
            "analysis_type": "activity"
        }
        response = ai_client.post("/analyze", json=payload)
        assert response.status_code in [200, 503]
    
    def test_ai_empty_text_validation(self, ai_client):
        """Test AI service rejects empty text."""
        payload = {
            "text": "",
            "analysis_type": "general"
        }
        response = ai_client.post("/analyze", json=payload)
        if response.status_code == 503:
            pass
        else:
            assert response.status_code == 400


class TestVizService:
    """Tests for visualization microservice."""
    
    def test_viz_health_check(self, viz_client):
        """Test visualization service health check."""
        response = viz_client.get("/health")
        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "healthy"
        assert "viz_available" in data
    
    def test_viz_root_endpoint(self, viz_client):
        """Test visualization service root endpoint."""
        response = viz_client.get("/")
        assert response.status_code == 200
        data = response.json()
        assert data["name"] == "Tikker Visualization Service"
        assert "supported_charts" in data
    
    def test_viz_bar_chart(self, viz_client):
        """Test bar chart generation."""
        payload = {
            "title": "Test Bar Chart",
            "data": {"A": 10, "B": 20, "C": 15},
            "chart_type": "bar",
            "width": 10,
            "height": 6
        }
        response = viz_client.post("/chart", json=payload)
        assert response.status_code in [200, 503]
        if response.status_code == 200:
            data = response.json()
            assert data["status"] == "success"
            assert data["chart_type"] == "bar"
            assert "image_base64" in data
    
    def test_viz_line_chart(self, viz_client):
        """Test line chart generation."""
        payload = {
            "title": "Test Line Chart",
            "data": {"Jan": 100, "Feb": 120, "Mar": 140},
            "chart_type": "line"
        }
        response = viz_client.post("/chart", json=payload)
        assert response.status_code in [200, 503]
    
    def test_viz_pie_chart(self, viz_client):
        """Test pie chart generation."""
        payload = {
            "title": "Test Pie Chart",
            "data": {"Category1": 30, "Category2": 40, "Category3": 30},
            "chart_type": "pie"
        }
        response = viz_client.post("/chart", json=payload)
        assert response.status_code in [200, 503]
    
    def test_viz_chart_download(self, viz_client):
        """Test chart download endpoint."""
        payload = {
            "title": "Download Test",
            "data": {"X": 50, "Y": 75},
            "chart_type": "bar"
        }
        response = viz_client.post("/chart/download", json=payload)
        assert response.status_code in [200, 503]
    
    def test_viz_invalid_chart_type(self, viz_client):
        """Test invalid chart type handling."""
        payload = {
            "title": "Invalid Chart",
            "data": {"A": 10},
            "chart_type": "invalid"
        }
        response = viz_client.post("/chart", json=payload)
        if response.status_code == 503:
            pass
        else:
            assert response.status_code == 400


class TestServiceIntegration:
    """Tests for service-to-service communication."""
    
    def test_all_services_healthy(self, api_client, ai_client, viz_client):
        """Test all services report healthy status."""
        api_response = api_client.get("/health")
        ai_response = ai_client.get("/health")
        viz_response = viz_client.get("/health")
        
        assert api_response.status_code == 200
        assert ai_response.status_code == 200
        assert viz_response.status_code == 200
    
    def test_api_to_ai_communication(self, api_client, ai_client):
        """Test API can communicate with AI service."""
        api_health = api_client.get("/health")
        ai_health = ai_client.get("/health")
        
        assert api_health.status_code == 200
        assert ai_health.status_code == 200
    
    def test_api_to_viz_communication(self, api_client, viz_client):
        """Test API can communicate with visualization service."""
        api_health = api_client.get("/health")
        viz_health = viz_client.get("/health")
        
        assert api_health.status_code == 200
        assert viz_health.status_code == 200
    
    def test_concurrent_service_requests(self, api_client, ai_client, viz_client):
        """Test multiple concurrent requests to different services."""
        responses = {
            "api": api_client.get("/health"),
            "ai": ai_client.get("/health"),
            "viz": viz_client.get("/health")
        }
        
        for service, response in responses.items():
            assert response.status_code == 200, f"{service} service failed"


class TestErrorHandling:
    """Tests for error handling and edge cases."""
    
    def test_api_invalid_endpoint(self, api_client):
        """Test API handles invalid endpoints."""
        response = api_client.get("/api/invalid")
        assert response.status_code == 404
    
    def test_ai_invalid_endpoint(self, ai_client):
        """Test AI service handles invalid endpoints."""
        response = ai_client.get("/invalid")
        assert response.status_code == 404
    
    def test_viz_invalid_endpoint(self, viz_client):
        """Test visualization service handles invalid endpoints."""
        response = viz_client.get("/invalid")
        assert response.status_code == 404
    
    def test_api_malformed_json(self, api_client):
        """Test API handles malformed JSON."""
        response = api_client.post(
            "/api/decode",
            content="invalid json",
            headers={"Content-Type": "application/json"}
        )
        assert response.status_code in [400, 422]
    
    def test_ai_malformed_json(self, ai_client):
        """Test AI service handles malformed JSON."""
        response = ai_client.post(
            "/analyze",
            content="invalid json",
            headers={"Content-Type": "application/json"}
        )
        assert response.status_code in [400, 422]


@pytest.fixture
def api_client():
    """Create API test client."""
    from fastapi.testclient import TestClient
    try:
        from api_c_integration import app
        return TestClient(app)
    except:
        return None


@pytest.fixture
def ai_client():
    """Create AI service test client."""
    from fastapi.testclient import TestClient
    try:
        from ai_service import app
        return TestClient(app)
    except:
        return None


@pytest.fixture
def viz_client():
    """Create visualization service test client."""
    from fastapi.testclient import TestClient
    try:
        from viz_service import app
        return TestClient(app)
    except:
        return None