# ================================================================
# services/training/tests/conftest.py
# ================================================================
"""
Test configuration and fixtures for Training Service
Provides shared fixtures, mock data, and test utilities
"""

import pytest
import asyncio
import pandas as pd
import numpy as np
import tempfile
import os
import json
from datetime import datetime, timedelta
from unittest.mock import Mock, AsyncMock, patch
from typing import Dict, List, Any, Generator
from pathlib import Path
import logging
from app.models.training import ModelTrainingLog, TrainedModel

# Configure pytest-asyncio
pytestmark = pytest.mark.asyncio

# Suppress Prophet logging during tests
logging.getLogger('prophet').setLevel(logging.WARNING)
logging.getLogger('cmdstanpy').setLevel(logging.WARNING)


# ================================================================
# PYTEST CONFIGURATION
# ================================================================

@pytest.fixture
def large_dataset_for_performance():
    """Generate large dataset for performance testing"""
    # Generate 2 years of data with 15 products
    start_date = datetime(2022, 1, 1)
    end_date = datetime(2024, 1, 1)
    date_range = pd.date_range(start=start_date, end=end_date, freq='D')
    
    products = [
        "Pan Integral", "Pan Blanco", "Croissant", "Magdalenas", 
        "Empanadas", "Tarta Chocolate", "Roscon Reyes", "Palmeras",
        "Donuts", "Berlinas", "Napolitanas", "Ensaimadas",
        "Baguette", "Pan de Molde", "Bizcocho"
    ]
    
    data = []
    for date in date_range:
        for product in products:
            # Realistic sales with patterns
            base_quantity = np.random.randint(5, 150)
            
            # Seasonal patterns
            if date.month in [12, 1]:  # Winter/Holiday season
                base_quantity *= 1.4
            elif date.month in [6, 7, 8]:  # Summer
                base_quantity *= 0.8
            
            # Weekly patterns
            if date.weekday() >= 5:  # Weekends
                base_quantity *= 1.2
            elif date.weekday() == 0:  # Monday
                base_quantity *= 0.7
            
            # Add noise
            quantity = max(1, int(base_quantity + np.random.normal(0, base_quantity * 0.1)))
            
            data.append({
                "date": date.strftime("%Y-%m-%d"),
                "product": product,
                "quantity": quantity,
                "revenue": round(quantity * np.random.uniform(1.5, 8.0), 2),
                "temperature": round(15 + 12 * np.sin((date.timetuple().tm_yday / 365) * 2 * np.pi) + np.random.normal(0, 3), 1),
                "precipitation": max(0, np.random.exponential(0.8)),
                "is_weekend": date.weekday() >= 5,
                "is_holiday": _is_spanish_holiday(date)
            })
    
    return pd.DataFrame(data)


@pytest.fixture
def memory_monitor():
    """Memory monitoring utility for performance tests"""
    import psutil
    import gc
    
    class MemoryMonitor:
        def __init__(self):
            self.process = psutil.Process()
            self.snapshots = []
        
        def snapshot(self, label: str):
            gc.collect()  # Force garbage collection
            memory_mb = self.process.memory_info().rss / 1024 / 1024
            self.snapshots.append({
                'label': label,
                'memory_mb': memory_mb,
                'timestamp': datetime.now()
            })
            return memory_mb
        
        def get_peak_usage(self):
            if not self.snapshots:
                return 0
            return max(s['memory_mb'] for s in self.snapshots)
        
        def get_usage_increase(self):
            if len(self.snapshots) < 2:
                return 0
            return self.snapshots[-1]['memory_mb'] - self.snapshots[0]['memory_mb']
        
        def report(self):
            print("\n=== Memory Usage Report ===")
            for snapshot in self.snapshots:
                print(f"{snapshot['label']}: {snapshot['memory_mb']:.2f} MB")
            print(f"Peak Usage: {self.get_peak_usage():.2f} MB")
            print(f"Total Increase: {self.get_usage_increase():.2f} MB")
    
    return MemoryMonitor()


@pytest.fixture
def timing_monitor():
    """Timing monitoring utility for performance tests"""
    import time
    
    class TimingMonitor:
        def __init__(self):
            self.timings = []
            self.start_time = None
        
        def start(self, label: str):
            self.start_time = time.time()
            self.current_label = label
        
        def stop(self):
            if self.start_time is None:
                return 0
            
            duration = time.time() - self.start_time
            self.timings.append({
                'label': self.current_label,
                'duration': duration
            })
            self.start_time = None
            return duration
        
        def get_total_time(self):
            return sum(t['duration'] for t in self.timings)
        
        def report(self):
            print("\n=== Timing Report ===")
            for timing in self.timings:
                print(f"{timing['label']}: {timing['duration']:.2f}s")
            print(f"Total Time: {self.get_total_time():.2f}s")
    
    return TimingMonitor()


# ================================================================
# INTEGRATION TEST FIXTURES
# ================================================================

@pytest.fixture
async def integration_test_setup(
    mock_external_services,
    sample_bakery_sales_data,
    temp_model_storage
):
    """Complete setup for integration tests"""
    
    # Patch model storage path
    with patch('app.core.config.settings.MODEL_STORAGE_PATH', str(temp_model_storage)):
        
        # Patch data fetching to use sample data
        with patch('app.services.training_service.TrainingService._fetch_sales_data') as mock_fetch:
            mock_fetch.return_value = sample_bakery_sales_data
            
            yield {
                'external_services': mock_external_services,
                'sales_data': sample_bakery_sales_data,
                'model_storage': temp_model_storage,
                'mock_fetch': mock_fetch
            }


@pytest.fixture
def mock_messaging():
    """Mock messaging system for testing"""
    with patch('app.services.messaging.publish_job_started') as mock_started, \
         patch('app.services.messaging.publish_job_completed') as mock_completed, \
         patch('app.services.messaging.publish_job_failed') as mock_failed, \
         patch('app.services.messaging.publish_model_trained') as mock_model:
        
        yield {
            'publish_job_started': mock_started,
            'publish_job_completed': mock_completed,
            'publish_job_failed': mock_failed,
            'publish_model_trained': mock_model
        }


# ================================================================
# API TEST FIXTURES
# ================================================================

@pytest.fixture
async def test_app():
    """Test FastAPI application instance"""
    from app.main import app
    return app

@pytest.fixture
def test_client(test_app):
    """Create test client for API testing - SYNC VERSION"""
    from httpx import Client
    
    with Client(app=test_app, base_url="http://test") as client:
        yield client
        
@pytest.fixture
def auth_headers():
    """Mock authentication headers"""
    return {
        "Authorization": "Bearer test_token_123",
        "X-Tenant-ID": "test_tenant_123"
    }


# ================================================================
# ERROR SIMULATION FIXTURES
# ================================================================

@pytest.fixture
def failing_external_services():
    """Mock external services that fail for error testing"""
    with patch('app.external.aemet.AEMETClient') as mock_aemet, \
         patch('app.external.madrid_opendata.MadridOpenDataClient') as mock_madrid:
        
        # Configure to raise exceptions
        mock_aemet_instance = AsyncMock()
        mock_aemet.return_value = mock_aemet_instance
        mock_aemet_instance.get_historical_weather.side_effect = Exception("AEMET API Error")
        
        mock_madrid_instance = AsyncMock()
        mock_madrid.return_value = mock_madrid_instance
        mock_madrid_instance.get_historical_traffic.side_effect = Exception("Madrid API Error")
        
        yield {
            'aemet': mock_aemet_instance,
            'madrid': mock_madrid_instance
        }


@pytest.fixture
def corrupted_sales_data(sample_bakery_sales_data):
    """Sales data with various quality issues for testing"""
    corrupted_data = sample_bakery_sales_data.copy()
    
    # Introduce missing values (20% of quantity data)
    missing_mask = np.random.random(len(corrupted_data)) < 0.2
    corrupted_data.loc[missing_mask, 'quantity'] = np.nan
    
    # Introduce extreme outliers (1% of data)
    outlier_mask = np.random.random(len(corrupted_data)) < 0.01
    corrupted_data.loc[outlier_mask, 'quantity'] *= 100
    
    # Introduce inconsistent dates (0.5% of data)
    future_mask = np.random.random(len(corrupted_data)) < 0.005
    corrupted_data.loc[future_mask, 'date'] = "2025-12-31"
    
    # Introduce negative values (0.2% of data)
    negative_mask = np.random.random(len(corrupted_data)) < 0.002
    corrupted_data.loc[negative_mask, 'quantity'] = -10
    
    return corrupted_data


# ================================================================
# VALIDATION TEST FIXTURES
# ================================================================

@pytest.fixture
def insufficient_sales_data():
    """Sales data with insufficient volume for training"""
    # Only 10 days of data
    start_date = datetime(2023, 1, 1)
    dates = [start_date + timedelta(days=i) for i in range(10)]
    
    data = []
    for date in dates:
        data.append({
            "date": date.strftime("%Y-%m-%d"),
            "product": "Pan Integral",
            "quantity": np.random.randint(10, 50),
            "revenue": round(np.random.uniform(20, 100), 2),
            "temperature": round(np.random.uniform(10, 25), 1),
            "precipitation": 0.0,
            "is_weekend": date.weekday() >= 5,
            "is_holiday": False
        })
    
    return pd.DataFrame(data)


@pytest.fixture
def seasonal_product_data():
    """Data for seasonal product (Roscon Reyes) testing"""
    start_date = datetime(2023, 1, 1)
    dates = [start_date + timedelta(days=i) for i in range(365)]
    
    data = []
    for date in dates:
        # Roscon Reyes has strong seasonal pattern (Christmas specialty)
        base_qty = 5  # Very low base
        
        if date.month == 12:  # December - high sales
            base_qty = 20 + (date.day - 1) * 2  # Increasing through December
        elif date.month == 1 and date.day <= 6:  # Until Epiphany
            base_qty = 50
        
        # Add some noise
        quantity = max(1, int(base_qty + np.random.normal(0, base_qty * 0.2)))
        
        data.append({
            "date": date.strftime("%Y-%m-%d"),
            "product": "Roscon Reyes",
            "quantity": quantity,
            "revenue": round(quantity * 25.0, 2),  # Expensive specialty item
            "temperature": round(15 + 12 * np.sin((date.timetuple().tm_yday / 365) * 2 * np.pi), 1),
            "precipitation": max(0, np.random.exponential(0.5)),
            "is_weekend": date.weekday() >= 5,
            "is_holiday": _is_spanish_holiday(date)
        })
    
    return pd.DataFrame(data)


# ================================================================
# CLEANUP FIXTURES
# ================================================================

@pytest.fixture(autouse=True)
def cleanup_after_test():
    """Automatic cleanup after each test"""
    yield
    
    # Clean up any test files
    import tempfile
    import shutil
    
    # Clear any temporary model files
    temp_dirs = [d for d in os.listdir(tempfile.gettempdir()) if d.startswith('test_models_')]
    for temp_dir in temp_dirs:
        try:
            shutil.rmtree(os.path.join(tempfile.gettempdir(), temp_dir))
        except:
            pass


# ================================================================
# TEST DATA VALIDATION UTILITIES
# ================================================================

class TestDataValidator:
    """Utility class for validating test data quality"""
    
    @staticmethod
    def validate_sales_data(df: pd.DataFrame) -> Dict[str, Any]:
        """Validate sales data structure and quality"""
        required_columns = ['date', 'product', 'quantity', 'revenue']
        missing_columns = [col for col in required_columns if col not in df.columns]
        
        if missing_columns:
            return {'valid': False, 'error': f'Missing columns: {missing_columns}'}
        
        # Check data types
        try:
            pd.to_datetime(df['date'])
        except:
            return {'valid': False, 'error': 'Invalid date format'}
        
        if not pd.api.types.is_numeric_dtype(df['quantity']):
            return {'valid': False, 'error': 'Quantity must be numeric'}
        
        if not pd.api.types.is_numeric_dtype(df['revenue']):
            return {'valid': False, 'error': 'Revenue must be numeric'}
        
        # Check for negative values
        if (df['quantity'] < 0).any():
            return {'valid': False, 'error': 'Negative quantities found'}
        
        if (df['revenue'] < 0).any():
            return {'valid': False, 'error': 'Negative revenue found'}
        
        return {'valid': True, 'rows': len(df), 'products': df['product'].nunique()}


@pytest.fixture
def test_data_validator():
    """Test data validator utility"""
    return TestDataValidator()


# ================================================================
# LOGGING CONFIGURATION FOR TESTS
# ================================================================

@pytest.fixture(autouse=True)
def configure_test_logging():
    """Configure logging for tests"""
    import logging
    
    # Reduce log level for external libraries during tests
    logging.getLogger('prophet').setLevel(logging.WARNING)
    logging.getLogger('cmdstanpy').setLevel(logging.ERROR)
    logging.getLogger('matplotlib').setLevel(logging.WARNING)
    logging.getLogger('urllib3').setLevel(logging.WARNING)
    
    # Configure our app logging for tests
    logger = logging.getLogger('app')
    logger.setLevel(logging.INFO)
    
    yield
    
    # Reset logging after tests
    logging.getLogger().handlers.clear()


# ================================================================
# ENVIRONMENT SETUP
# ================================================================

@pytest.fixture(scope="session", autouse=True)
def setup_test_environment():
    """Setup test environment variables"""
    os.environ.update({
        'ENVIRONMENT': 'test',
        'LOG_LEVEL': 'INFO',
        'MODEL_STORAGE_PATH': '/tmp/test_models',
        'MAX_TRAINING_TIME_MINUTES': '5',
        'MIN_TRAINING_DATA_DAYS': '7',
        'PROPHET_SEASONALITY_MODE': 'additive',
        'ENABLE_SYNTHETIC_DATA': 'true',
        'SKIP_EXTERNAL_API_CALLS': 'true'
    })
    
    yield
    
    # Cleanup environment - FIXED: removed (scope="session")
    test_vars = [
        'ENVIRONMENT', 'LOG_LEVEL', 'MODEL_STORAGE_PATH',
        'MAX_TRAINING_TIME_MINUTES', 'MIN_TRAINING_DATA_DAYS',
        'PROPHET_SEASONALITY_MODE', 'ENABLE_SYNTHETIC_DATA',
        'SKIP_EXTERNAL_API_CALLS'
    ]
    
    for var in test_vars:
        os.environ.pop(var, None)  # FIXED: removed the erroneous (scope="session")
        
def event_loop():
    """Create an instance of the default event loop for the test session."""
    loop = asyncio.new_event_loop()
    yield loop
    loop.close()


def pytest_configure(config):
    """Configure pytest with custom markers"""
    config.addinivalue_line(
        "markers", "slow: marks tests as slow (deselect with '-m \"not slow\"')"
    )
    config.addinivalue_line(
        "markers", "integration: marks tests as integration tests"
    )
    config.addinivalue_line(
        "markers", "unit: marks tests as unit tests"
    )
    config.addinivalue_line(
        "markers", "performance: marks tests as performance tests"
    )
    config.addinivalue_line(
        "markers", "external: marks tests that require external services"
    )


def pytest_collection_modifyitems(config, items):
    """Modify test collection to add markers automatically"""
    for item in items:
        # Mark performance tests
        if "performance" in item.nodeid:
            item.add_marker(pytest.mark.performance)
            item.add_marker(pytest.mark.slow)
        
        # Mark integration tests
        if "integration" in item.nodeid:
            item.add_marker(pytest.mark.integration)
        
        # Mark end-to-end tests
        if "end_to_end" in item.nodeid:
            item.add_marker(pytest.mark.integration)
            item.add_marker(pytest.mark.external)
        
        # Mark unit tests (default for others)
        if not any(marker.name in ["integration", "performance"] for marker in item.iter_markers()):
            item.add_marker(pytest.mark.unit)


# ================================================================
# TEST DATABASE FIXTURES
# ================================================================

@pytest_asyncio.fixture
async def test_db_session():
    """Create async test database session"""
    from app.core.database import database_manager
    
    async with database_manager.async_session_local() as session:
        yield session

@pytest.fixture
def training_job_in_db(test_db_session):
    """Create a training job in database for testing"""
    from app.models.training import ModelTrainingLog  # Add this import
    from datetime import datetime
    
    job = ModelTrainingLog(
        job_id="test-job-123",
        tenant_id="test-tenant",
        status="running",
        progress=50,
        current_step="Training models",
        start_time=datetime.now(),  # Use start_time, not started_at
        config={"include_weather": True},
        created_at=datetime.now(),
        updated_at=datetime.now()
    )
    test_db_session.add(job)
    test_db_session.commit()
    test_db_session.refresh(job)
    return job

@pytest.fixture
def trained_model_in_db(test_db_session):
    """Create a trained model in database for testing"""
    from app.models.training import TrainedModel  # Add this import
    from datetime import datetime
    
    model = TrainedModel(
        model_id="test-model-123",
        tenant_id="test-tenant",
        product_name="Pan Integral",
        model_type="prophet",
        model_path="/tmp/test_model.pkl",
        version=1,
        training_samples=100,
        features=["temperature", "humidity"],
        hyperparameters={"seasonality_mode": "additive"},
        training_metrics={"mae": 2.5, "mse": 8.3},
        is_active=True,
        created_at=datetime.now()
    )
    test_db_session.add(model)
    test_db_session.commit()
    test_db_session.refresh(model)
    return model

# ================================================================
# SAMPLE DATA FIXTURES
# ================================================================

@pytest.fixture
def sample_bakery_sales_data():
    """Generate comprehensive bakery sales data for testing"""
    # Generate 1 year of data
    start_date = datetime(2023, 1, 1)
    dates = [start_date + timedelta(days=i) for i in range(365)]
    
    # Spanish bakery products with realistic patterns
    products = [
        "Pan Integral", "Pan Blanco", "Croissant", "Magdalenas", 
        "Empanadas", "Tarta Chocolate", "Roscon Reyes", "Palmeras",
        "Donuts", "Berlinas", "Napolitanas", "Ensaimadas"
    ]
    
    # Product-specific configurations
    product_config = {
        "Pan Integral": {"base": 80, "price": 2.80, "weekend_boost": 1.1, "seasonal": False},
        "Pan Blanco": {"base": 120, "price": 2.50, "weekend_boost": 1.2, "seasonal": False},
        "Croissant": {"base": 45, "price": 1.50, "weekend_boost": 1.4, "seasonal": False},
        "Magdalenas": {"base": 30, "price": 1.20, "weekend_boost": 1.1, "seasonal": False},
        "Empanadas": {"base": 25, "price": 3.50, "weekend_boost": 0.9, "seasonal": False},
        "Tarta Chocolate": {"base": 15, "price": 18.00, "weekend_boost": 1.6, "seasonal": False},
        "Roscon Reyes": {"base": 8, "price": 25.00, "weekend_boost": 1.0, "seasonal": True},
        "Palmeras": {"base": 12, "price": 1.80, "weekend_boost": 1.2, "seasonal": False},
        "Donuts": {"base": 20, "price": 1.40, "weekend_boost": 1.3, "seasonal": False},
        "Berlinas": {"base": 18, "price": 1.60, "weekend_boost": 1.2, "seasonal": False},
        "Napolitanas": {"base": 22, "price": 1.70, "weekend_boost": 1.1, "seasonal": False},
        "Ensaimadas": {"base": 15, "price": 2.20, "weekend_boost": 1.0, "seasonal": False}
    }
    
    data = []
    
    for date in dates:
        # Calculate date-specific factors
        day_of_year = date.timetuple().tm_yday
        is_weekend = date.weekday() >= 5
        is_holiday = _is_spanish_holiday(date)
        
        # Madrid weather simulation
        temp = 14 + 12 * np.sin((day_of_year / 365) * 2 * np.pi) + np.random.normal(0, 3)
        precip = max(0, np.random.exponential(0.8))
        
        for product in products:
            config = product_config[product]
            
            # Base quantity
            base_qty = config["base"]
            
            # Apply weekend boost
            if is_weekend:
                base_qty *= config["weekend_boost"]
            
            # Apply holiday boost
            if is_holiday:
                base_qty *= 1.3
            
            # Seasonal products (like Roscon Reyes for Christmas)
            if config["seasonal"] and product == "Roscon Reyes":
                if date.month == 12:
                    # Exponential increase through December
                    base_qty *= (1 + (date.day - 1) / 5)
                elif date.month == 1 and date.day <= 6:
                    # High demand until Epiphany (Jan 6)
                    base_qty *= 3
                else:
                    # Very low demand rest of year
                    base_qty *= 0.1
            
            # Weather effects
            if temp > 30:  # Very hot days
                if product in ["Pan Integral", "Pan Blanco"]:
                    base_qty *= 0.7  # Less bread
                elif product in ["Donuts", "Berlinas"]:
                    base_qty *= 0.8  # Less fried items
            elif temp < 5:  # Cold days
                base_qty *= 1.15  # More baked goods
            
            # Add realistic noise and ensure minimum of 1
            quantity = max(1, int(base_qty + np.random.normal(0, base_qty * 0.12)))
            revenue = round(quantity * config["price"], 2)
            
            data.append({
                "date": date.strftime("%Y-%m-%d"),
                "product": product,
                "quantity": quantity,
                "revenue": revenue,
                "temperature": round(temp, 1),
                "precipitation": round(precip, 2),
                "is_weekend": is_weekend,
                "is_holiday": is_holiday
            })
    
    return pd.DataFrame(data)


@pytest.fixture
def sample_weather_data():
    """Generate realistic Madrid weather data"""
    start_date = datetime(2023, 1, 1)
    weather_data = []
    
    for i in range(365):
        date = start_date + timedelta(days=i)
        day_of_year = date.timetuple().tm_yday
        
        # Madrid climate simulation
        base_temp = 14 + 12 * np.sin((day_of_year / 365) * 2 * np.pi)
        
        # Seasonal humidity patterns
        base_humidity = 50 + 20 * np.sin((day_of_year / 365) * 2 * np.pi + np.pi)
        
        weather_data.append({
            "date": date,
            "temperature": round(base_temp + np.random.normal(0, 4), 1),
            "precipitation": max(0, np.random.exponential(1.2)),
            "humidity": np.random.uniform(25, 75),
            "wind_speed": np.random.uniform(3, 20),
            "pressure": np.random.uniform(995, 1025),
            "description": np.random.choice([
                "Soleado", "Parcialmente nublado", "Nublado", 
                "Lluvia ligera", "Despejado", "Variable"
            ]),
            "source": "aemet_test"
        })
    
    return weather_data


@pytest.fixture
def sample_traffic_data():
    """Generate realistic Madrid traffic data"""
    start_date = datetime(2023, 1, 1)
    traffic_data = []
    
    for i in range(365):
        date = start_date + timedelta(days=i)
        
        # Generate multiple measurements per day
        for hour in range(6, 22, 2):  # Every 2 hours from 6 AM to 10 PM
            measurement_time = date.replace(hour=hour)
            
            # Madrid traffic patterns
            if hour in [7, 8, 9, 18, 19, 20]:  # Rush hours
                volume = np.random.randint(1200, 2000)
                congestion = "high"
                speed = np.random.randint(10, 25)
                occupation = np.random.randint(60, 90)
            elif hour in [12, 13, 14]:  # Lunch time
                volume = np.random.randint(800, 1200)
                congestion = "medium"
                speed = np.random.randint(20, 35)
                occupation = np.random.randint(40, 70)
            else:  # Off-peak
                volume = np.random.randint(300, 800)
                congestion = "low"
                speed = np.random.randint(30, 50)
                occupation = np.random.randint(15, 50)
            
            # Weekend adjustment
            if date.weekday() >= 5:
                volume = int(volume * 0.8)  # Less traffic on weekends
                speed = min(50, int(speed * 1.2))  # Faster speeds
            
            traffic_data.append({
                "date": measurement_time,
                "traffic_volume": volume,
                "occupation_percentage": occupation,
                "load_percentage": min(95, occupation + np.random.randint(5, 15)),
                "average_speed": speed,
                "congestion_level": congestion,
                "pedestrian_count": np.random.randint(100, 800),
                "measurement_point_id": "MADRID_TEST_001",
                "measurement_point_name": "Plaza Mayor",
                "road_type": "URB",
                "source": "madrid_opendata_test"
            })
    
    return traffic_data


# ================================================================
# MOCK SERVICES FIXTURES
# ================================================================

@pytest.fixture
async def mock_aemet_client(sample_weather_data):
    """Mock AEMET weather API client"""
    with patch('app.external.aemet.AEMETClient') as mock_class:
        mock_instance = AsyncMock()
        mock_class.return_value = mock_instance
        
        # Configure mock responses
        mock_instance.get_historical_weather.return_value = sample_weather_data
        mock_instance.get_current_weather.return_value = sample_weather_data[-1]
        mock_instance.get_weather_forecast.return_value = sample_weather_data[-7:]
        
        yield mock_instance


@pytest.fixture
async def mock_madrid_client(sample_traffic_data):
    """Mock Madrid OpenData API client"""
    with patch('app.external.madrid_opendata.MadridOpenDataClient') as mock_class:
        mock_instance = AsyncMock()
        mock_class.return_value = mock_instance
        
        # Configure mock responses
        mock_instance.get_historical_traffic.return_value = sample_traffic_data
        mock_instance.get_current_traffic.return_value = sample_traffic_data[-1]
        
        yield mock_instance


@pytest.fixture
async def mock_external_services(mock_aemet_client, mock_madrid_client):
    """Combined mock for all external services"""
    return {
        'aemet': mock_aemet_client,
        'madrid': mock_madrid_client
    }


# ================================================================
# ML COMPONENT FIXTURES
# ================================================================

@pytest.fixture
def mock_ml_trainer():
    """Mock ML trainer for testing"""
    with patch('app.ml.trainer.BakeryMLTrainer') as mock_class:
        mock_instance = AsyncMock()
        mock_class.return_value = mock_instance
        
        # Configure successful training responses
        mock_instance.train_single_product.return_value = {
            "status": "completed",
            "model_id": "test_model_123",
            "metrics": {
                "mape": 25.5,
                "rmse": 12.3,
                "mae": 8.7,
                "r2_score": 0.85
            },
            "training_duration": 45.2,
            "data_points_used": 365
        }
        
        mock_instance.train_tenant_models.return_value = [
            {
                "product_name": "Pan Integral",
                "model_id": "model_pan_integral_123",
                "metrics": {"mape": 22.1, "rmse": 10.5, "mae": 7.8},
                "training_completed": True
            },
            {
                "product_name": "Croissant",
                "model_id": "model_croissant_456",
                "metrics": {"mape": 28.3, "rmse": 8.9, "mae": 6.2},
                "training_completed": True
            }
        ]
        
        yield mock_instance


@pytest.fixture
def mock_data_processor():
    """Mock data processor for testing"""
    with patch('app.ml.data_processor.BakeryDataProcessor') as mock_class:
        mock_instance = AsyncMock()
        mock_class.return_value = mock_instance
        
        # Configure mock responses
        mock_instance.validate_data_quality.return_value = {
            "is_valid": True,
            "data_points": 1000,
            "missing_percentage": 2.5,
            "issues": []
        }
        
        mock_instance.prepare_training_data.return_value = pd.DataFrame({
            "ds": pd.date_range("2023-01-01", periods=365),
            "y": np.random.randint(10, 100, 365),
            "temperature": np.random.uniform(0, 35, 365),
            "traffic_volume": np.random.randint(100, 2000, 365)
        })
        
        yield mock_instance

@pytest.fixture
def mock_data_service():
    """Mock data service for testing"""
    from unittest.mock import Mock, AsyncMock
    
    mock_service = Mock()
    mock_service.get_sales_data = AsyncMock(return_value=[
        {"date": "2024-01-01", "product_name": "Pan Integral", "quantity": 45},
        {"date": "2024-01-02", "product_name": "Pan Integral", "quantity": 38}
    ])
    mock_service.get_weather_data = AsyncMock(return_value=[
        {"date": "2024-01-01", "temperature": 20.5, "humidity": 65}
    ])
    mock_service.get_traffic_data = AsyncMock(return_value=[
        {"date": "2024-01-01", "traffic_index": 0.7}
    ])
    
    return mock_service

@pytest.fixture
def mock_prophet_manager():
    """Mock Prophet manager for testing"""
    with patch('app.ml.prophet_manager.BakeryProphetManager') as mock_class:
        mock_instance = AsyncMock()
        mock_class.return_value = mock_instance
        
        # Configure mock responses
        mock_instance.train_model.return_value = {
            "model": Mock(),  # Mock Prophet model
            "metrics": {
                "mape": 23.7,
                "rmse": 11.2,
                "mae": 8.1
            },
            "cross_validation": {
                "cv_mape_mean": 25.1,
                "cv_mape_std": 3.2
            }
        }
        
        mock_instance.generate_predictions.return_value = pd.DataFrame({
            "ds": pd.date_range("2024-01-01", periods=30),
            "yhat": np.random.uniform(20, 80, 30),
            "yhat_lower": np.random.uniform(10, 60, 30),
            "yhat_upper": np.random.uniform(30, 100, 30)
        })
        
        yield mock_instance


# ================================================================
# UTILITY FIXTURES
# ================================================================

@pytest.fixture
def temp_model_storage():
    """Temporary directory for model storage during tests"""
    with tempfile.TemporaryDirectory() as temp_dir:
        yield Path(temp_dir)


@pytest.fixture
def test_config():
    """Test configuration settings"""
    return {
        "MODEL_STORAGE_PATH": "/tmp/test_models",
        "MAX_TRAINING_TIME_MINUTES": 5,
        "MIN_TRAINING_DATA_DAYS": 7,
        "PROPHET_SEASONALITY_MODE": "additive",
        "INCLUDE_SPANISH_HOLIDAYS": True,
        "ENABLE_SYNTHETIC_DATA": True
    }


@pytest.fixture
def sample_training_request():
    """Sample training request for API tests"""
    return {
        "products": ["Pan Integral", "Croissant"],
        "include_weather": True,
        "include_traffic": True,
        "config": {
            "seasonality_mode": "additive",
            "changepoint_prior_scale": 0.05,
            "seasonality_prior_scale": 10.0,
            "validation_enabled": True
        }
    }


@pytest.fixture
def sample_single_product_request():
    """Sample single product training request"""
    return {
        "product_name": "Pan Integral",
        "include_weather": True,
        "include_traffic": False,
        "config": {
            "seasonality_mode": "multiplicative",
            "include_holidays": True,
            "holiday_prior_scale": 15.0
        }
    }


# ================================================================
# HELPER FUNCTIONS
# ================================================================

def _is_spanish_holiday(date: datetime) -> bool:
    """Check if date is a Spanish holiday"""
    spanish_holidays = [
        (1, 1),   # Año Nuevo
        (1, 6),   # Reyes Magos
        (5, 1),   # Día del Trabajo
        (8, 15),  # Asunción de la Virgen
        (10, 12), # Fiesta Nacional de España
        (11, 1),  # Todos los Santos
        (12, 6),  # Día de la Constitución
        (12, 8),  # Inmaculada Concepción
        (12, 25), # Navidad
    ]
    return (date.month, date.day) in spanish_holidays


@pytest.fixture
def spanish_holidays_2023():
    """List of Spanish holidays for 2023"""
    holidays = []
    for month, day in [
        (1, 1), (1, 6), (5, 1), (8, 15), (10, 12), 
        (11, 1), (12, 6), (12, 8), (12, 25)
    ]:
        holidays.append(datetime(2023, month, day))
    return holidays


# ================================================================
# PERFORMANCE TESTING FIXTURES
# ================================================================

@pytest.fixture
def large_dataset_for_performance():
   """Generate large dataset for performance testing"""
   # Generate 2 years of data with 15 products
   start_date = datetime(2022, 1, 1)
   end_date = datetime(2024, 1, 1)
   date_range = pd.date_range(start=start_date, end=end_date, freq='D')
   
   products = [
       "Pan Integral", "Pan Blanco", "Croissant", "Magdalenas", 
       "Empanadas", "Tarta Chocolate", "Roscon Reyes", "Palmeras",
       "Donuts", "Berlinas", "Napolitanas", "Ensaimadas",
       "Baguette", "Pan de Molde", "Bizcocho"
   ]
   
   data = []
   for date in date_range:
       for product in products:
           # Realistic sales with patterns
           base_quantity = np.random.randint(5, 150)
           
           # Seasonal patterns
           if date.month in [12, 1]:  # Winter/Holiday season
               base_quantity *= 1.4
           elif date.month in [6, 7, 8]:  # Summer
               base_quantity *= 0.8
           
           # Weekly patterns
           if date.weekday() >= 5:  # Weekends
               base_quantity *= 1.2
           elif date.weekday() == 0:  # Monday
               base_quantity *= 0.7
           
           # Add noise
           quantity = max(1, int(base_quantity + np.random.normal(0, base_quantity * 0.1)))
           
           data.append({
               "date": date.strftime("%Y-%m-%d"),
               "product": product,
               "quantity": quantity,
               "revenue": round(quantity * np.random.uniform(1.5, 8.0), 2),
               "temperature": round(15 + 12 * np.sin((date.timetuple().tm_yday / 365) * 2 * np.pi) + np.random.normal(0, 3), 1),
               "precipitation": max(0, np.random.exponential(0.8)),
               "is_weekend": date.weekday() >= 5,
               "is_holiday": _is_spanish_holiday(date)
           })
   
   return pd.DataFrame(data)


@pytest.fixture
def memory_monitor():
   """Memory monitoring utility for performance tests"""
   import psutil
   import gc
   
   class MemoryMonitor:
       def __init__(self):
           self.process = psutil.Process()
           self.snapshots = []
       
       def snapshot(self, label: str):
           gc.collect()  # Force garbage collection
           memory_mb = self.process.memory_info().rss / 1024 / 1024
           self.snapshots.append({
               'label': label,
               'memory_mb': memory_mb,
               'timestamp': datetime.now()
           })
           return memory_mb
       
       def get_peak_usage(self):
           if not self.snapshots:
               return 0
           return max(s['memory_mb'] for s in self.snapshots)
       
       def get_usage_increase(self):
           if len(self.snapshots) < 2:
               return 0
           return self.snapshots[-1]['memory_mb'] - self.snapshots[0]['memory_mb']
       
       def report(self):
           print("\n=== Memory Usage Report ===")
           for snapshot in self.snapshots:
               print(f"{snapshot['label']}: {snapshot['memory_mb']:.2f} MB")
           print(f"Peak Usage: {self.get_peak_usage():.2f} MB")
           print(f"Total Increase: {self.get_usage_increase():.2f} MB")
   
   return MemoryMonitor()


@pytest.fixture
def timing_monitor():
   """Timing monitoring utility for performance tests"""
   import time
   
   class TimingMonitor:
       def __init__(self):
           self.timings = []
           self.start_time = None
       
       def start(self, label: str):
           self.start_time = time.time()
           self.current_label = label
       
       def stop(self):
           if self.start_time is None:
               return 0
           
           duration = time.time() - self.start_time
           self.timings.append({
               'label': self.current_label,
               'duration': duration
           })
           self.start_time = None
           return duration
       
       def get_total_time(self):
           return sum(t['duration'] for t in self.timings)
       
       def report(self):
           print("\n=== Timing Report ===")
           for timing in self.timings:
               print(f"{timing['label']}: {timing['duration']:.2f}s")
           print(f"Total Time: {self.get_total_time():.2f}s")
   
   return TimingMonitor()


# ================================================================
# ADDITIONAL FIXTURES FOR COMPREHENSIVE TESTING
# ================================================================

@pytest.fixture
def mock_job_scheduler():
    """Mock job scheduler for testing"""
    with patch('app.services.job_scheduler.JobScheduler') as mock_scheduler:
        mock_instance = Mock()
        mock_scheduler.return_value = mock_instance
        
        mock_instance.schedule_job.return_value = "scheduled_job_123"
        mock_instance.cancel_job.return_value = True
        mock_instance.get_job_status.return_value = "running"
        
        yield mock_instance


@pytest.fixture
def sample_model_metadata():
    """Sample model metadata for testing"""
    return {
        "model_id": "test_model_123",
        "tenant_id": "test_tenant",
        "product_name": "Pan Integral",
        "model_type": "prophet",
        "training_date": datetime.now().isoformat(),
        "data_points_used": 365,
        "features_used": ["temperature", "is_weekend", "is_holiday"],
        "metrics": {
            "mape": 23.5,
            "rmse": 12.3,
            "mae": 8.7,
            "r2_score": 0.85
        },
        "hyperparameters": {
            "seasonality_mode": "additive",
            "changepoint_prior_scale": 0.05,
            "seasonality_prior_scale": 10.0
        },
        "version": "1.0",
        "status": "active"
    }


@pytest.fixture
def training_progress_states():
    """Different training progress states for testing"""
    return [
        {"status": "pending", "progress": 0, "current_step": "Initializing training job"},
        {"status": "running", "progress": 10, "current_step": "Fetching sales data"},
        {"status": "running", "progress": 25, "current_step": "Processing weather data"},
        {"status": "running", "progress": 40, "current_step": "Processing traffic data"},
        {"status": "running", "progress": 55, "current_step": "Engineering features"},
        {"status": "running", "progress": 70, "current_step": "Training Pan Integral model"},
        {"status": "running", "progress": 85, "current_step": "Validating model performance"},
        {"status": "running", "progress": 95, "current_step": "Saving model artifacts"},
        {"status": "completed", "progress": 100, "current_step": "Training completed successfully"}
    ]


@pytest.fixture
def error_scenarios():
    """Different error scenarios for testing"""
    return {
        "insufficient_data": {
            "error_type": "DataError",
            "error_message": "Insufficient training data: only 15 days available, minimum 30 required",
            "error_code": "INSUFFICIENT_DATA"
        },
        "external_api_failure": {
            "error_type": "ExternalAPIError", 
            "error_message": "Failed to fetch weather data from AEMET API",
            "error_code": "WEATHER_API_ERROR"
        },
        "model_training_failure": {
            "error_type": "ModelTrainingError",
            "error_message": "Prophet model training failed: unable to fit data",
            "error_code": "MODEL_TRAINING_FAILED"
        },
        "data_quality_error": {
            "error_type": "DataQualityError",
            "error_message": "Data quality issues detected: 45% missing values in quantity column",
            "error_code": "DATA_QUALITY_POOR"
        }
    }


@pytest.fixture
def performance_benchmarks():
    """Performance benchmarks for testing"""
    return {
        "single_product_training": {
            "max_duration_seconds": 120,
            "max_memory_mb": 500,
            "min_accuracy_mape": 50
        },
        "multi_product_training": {
            "max_duration_seconds": 300,
            "max_memory_mb": 1000,
            "min_accuracy_mape": 55
        },
        "data_processing": {
            "max_throughput_rows_per_second": 1000,
            "max_memory_per_1k_rows_mb": 10
        },
        "concurrent_jobs": {
            "max_concurrent_jobs": 5,
            "max_queue_time_seconds": 30
        }
    }


@pytest.fixture 
def mock_model_storage():
    """Mock model storage system for testing"""
    storage = {}
    
    class MockModelStorage:
        def save_model(self, model_id: str, model_data: Any, metadata: Dict[str, Any]):
            storage[model_id] = {
                "model_data": model_data,
                "metadata": metadata,
                "saved_at": datetime.now()
            }
            return f"/models/{model_id}.pkl"
        
        def load_model(self, model_id: str):
            if model_id in storage:
                return storage[model_id]["model_data"]
            raise FileNotFoundError(f"Model {model_id} not found")
        
        def get_metadata(self, model_id: str):
            if model_id in storage:
                return storage[model_id]["metadata"]
            raise FileNotFoundError(f"Model {model_id} not found")
        
        def delete_model(self, model_id: str):
            if model_id in storage:
                del storage[model_id]
                return True
            return False
        
        def list_models(self, tenant_id: str = None):
            models = []
            for model_id, data in storage.items():
                if tenant_id is None or data["metadata"].get("tenant_id") == tenant_id:
                    models.append({
                        "model_id": model_id,
                        "metadata": data["metadata"],
                        "saved_at": data["saved_at"]
                    })
            return models
    
    return MockModelStorage()


@pytest.fixture
def real_world_scenarios():
    """Real-world bakery scenarios for testing"""
    return {
        "holiday_rush": {
            "description": "Christmas season with high demand for seasonal products",
            "date_range": ("2023-12-15", "2023-12-31"),
            "expected_patterns": {
                "Roscon Reyes": {"multiplier": 5.0, "trend": "increasing"},
                "Pan Integral": {"multiplier": 1.3, "trend": "stable"},
                "Tarta Chocolate": {"multiplier": 2.0, "trend": "increasing"}
            }
        },
        "summer_slowdown": {
            "description": "Summer period with generally lower sales",
            "date_range": ("2023-07-01", "2023-08-31"),
            "expected_patterns": {
                "Pan Integral": {"multiplier": 0.8, "trend": "decreasing"},
                "Croissant": {"multiplier": 0.9, "trend": "stable"},
                "Cold_drinks": {"multiplier": 1.5, "trend": "increasing"}
            }
        },
        "weekend_patterns": {
            "description": "Weekend shopping patterns",
            "expected_patterns": {
                "weekend_boost": 1.2,
                "peak_hours": ["10:00", "11:00", "18:00", "19:00"],
                "popular_products": ["Croissant", "Palmeras", "Tarta Chocolate"]
            }
        },
        "weather_impact": {
            "description": "Weather impact on sales",
            "scenarios": {
                "rainy_day": {"bread_sales": 1.1, "pastry_sales": 0.9},
                "hot_day": {"bread_sales": 0.8, "cold_items": 1.3},
                "cold_day": {"bread_sales": 1.2, "hot_items": 1.4}
            }
        }
    }


@pytest.fixture
def data_quality_test_cases():
    """Various data quality test cases"""
    return {
        "missing_values": {
            "quantity_missing_5pct": 0.05,
            "quantity_missing_20pct": 0.20,
            "quantity_missing_50pct": 0.50,
            "revenue_missing_10pct": 0.10
        },
        "outliers": {
            "extreme_high": 100,  # 100x normal values
            "extreme_low": 0.01,  # Near-zero values
            "negative_values": -1,
            "outlier_percentage": 0.01
        },
        "inconsistencies": {
            "future_dates": ["2025-12-31", "2026-01-01"],
            "invalid_dates": ["2023-13-01", "2023-02-30"],
            "mismatched_revenue": True,  # Revenue doesn't match quantity * price
            "duplicate_records": True
        },
        "insufficient_data": {
            "too_few_days": 10,
            "too_few_products": 1,
            "sporadic_data": 0.3  # Only 30% of expected data points
        }
    }


@pytest.fixture
def api_test_scenarios():
    """API testing scenarios"""
    return {
        "authentication": {
            "valid_token": "Bearer valid_test_token_123",
            "invalid_token": "Bearer invalid_token",
            "expired_token": "Bearer expired_token_456",
            "missing_token": None
        },
        "request_validation": {
            "valid_request": {
                "products": ["Pan Integral"],
                "include_weather": True,
                "include_traffic": True,
                "config": {"seasonality_mode": "additive"}
            },
            "invalid_products": {
                "products": [],  # Empty products list
                "include_weather": True
            },
            "invalid_config": {
                "products": ["Pan Integral"],
                "config": {"seasonality_mode": "invalid_mode"}
            },
            "missing_required_fields": {
                "include_weather": True  # Missing products
            }
        },
        "rate_limiting": {
            "max_requests_per_minute": 60,
            "burst_requests": 100
        }
    }


@pytest.fixture
def integration_test_dependencies():
    """Dependencies for integration testing"""
    
    class IntegrationDependencies:
        def __init__(self):
            self.external_services = {}
            self.databases = {}
            self.message_queues = {}
            self.storage_systems = {}
        
        def register_external_service(self, name: str, mock_instance):
            self.external_services[name] = mock_instance
        
        def register_database(self, name: str, mock_session):
            self.databases[name] = mock_session
        
        def register_message_queue(self, name: str, mock_queue):
            self.message_queues[name] = mock_queue
        
        def register_storage(self, name: str, mock_storage):
            self.storage_systems[name] = mock_storage
        
        def get_service(self, name: str):
            return self.external_services.get(name)
        
        def get_database(self, name: str):
            return self.databases.get(name)
        
        def are_all_services_healthy(self):
            # Mock health check for all registered services
            return len(self.external_services) > 0
    
    return IntegrationDependencies()


@pytest.fixture
def load_test_configuration():
    """Configuration for load testing"""
    return {
        "concurrent_users": {
            "light_load": 5,
            "medium_load": 15,
            "heavy_load": 30,
            "stress_load": 50
        },
        "test_duration": {
            "quick_test": 60,  # 1 minute
            "standard_test": 300,  # 5 minutes
            "extended_test": 900  # 15 minutes
        },
        "request_patterns": {
            "constant_rate": "steady",
            "ramp_up": "increasing",
            "spike": "burst",
            "random": "variable"
        },
        "success_criteria": {
            "min_success_rate": 0.95,
            "max_response_time": 30.0,  # seconds
            "max_error_rate": 0.05
        }
    }


@pytest.fixture
def mock_notification_system():
    """Mock notification system for testing"""
    notifications_sent = []
    
    class MockNotificationSystem:
        def send_training_started(self, tenant_id: str, job_id: str, products: List[str]):
            notification = {
                "type": "training_started",
                "tenant_id": tenant_id,
                "job_id": job_id,
                "products": products,
                "timestamp": datetime.now()
            }
            notifications_sent.append(notification)
            return notification
        
        def send_training_completed(self, tenant_id: str, job_id: str, results: Dict[str, Any]):
            notification = {
                "type": "training_completed",
                "tenant_id": tenant_id,
                "job_id": job_id,
                "results": results,
                "timestamp": datetime.now()
            }
            notifications_sent.append(notification)
            return notification
        
        def send_training_failed(self, tenant_id: str, job_id: str, error: str):
            notification = {
                "type": "training_failed",
                "tenant_id": tenant_id,
                "job_id": job_id,
                "error": error,
                "timestamp": datetime.now()
            }
            notifications_sent.append(notification)
            return notification
        
        def get_notifications(self, tenant_id: str = None):
            if tenant_id:
                return [n for n in notifications_sent if n["tenant_id"] == tenant_id]
            return notifications_sent
        
        def clear_notifications(self):
            notifications_sent.clear()
    
    return MockNotificationSystem()


@pytest.fixture
def test_metrics_collector():
    """Test metrics collector for monitoring test performance"""
    metrics = {}
    
    class TestMetricsCollector:
        def __init__(self):
            self.start_times = {}
            self.counters = {}
            self.gauges = {}
            self.histograms = {}
        
        def start_timer(self, metric_name: str):
            self.start_times[metric_name] = time.time()
        
        def end_timer(self, metric_name: str):
            if metric_name in self.start_times:
                duration = time.time() - self.start_times[metric_name]
                if metric_name not in self.histograms:
                    self.histograms[metric_name] = []
                self.histograms[metric_name].append(duration)
                del self.start_times[metric_name]
                return duration
            return 0
        
        def increment_counter(self, counter_name: str, value: int = 1):
            self.counters[counter_name] = self.counters.get(counter_name, 0) + value
        
        def set_gauge(self, gauge_name: str, value: float):
            self.gauges[gauge_name] = value
        
        def get_counter(self, counter_name: str):
            return self.counters.get(counter_name, 0)
        
        def get_gauge(self, gauge_name: str):
            return self.gauges.get(gauge_name, 0)
        
        def get_histogram_stats(self, histogram_name: str):
            if histogram_name not in self.histograms:
                return {}
            
            values = self.histograms[histogram_name]
            return {
                "count": len(values),
                "min": min(values) if values else 0,
                "max": max(values) if values else 0,
                "avg": sum(values) / len(values) if values else 0,
                "p50": sorted(values)[len(values)//2] if values else 0,
                "p95": sorted(values)[int(len(values)*0.95)] if values else 0,
                "p99": sorted(values)[int(len(values)*0.99)] if values else 0
            }
        
        def get_all_metrics(self):
            return {
                "counters": self.counters,
                "gauges": self.gauges,
                "histograms": {name: self.get_histogram_stats(name) for name in self.histograms}
            }
        
        def reset(self):
            self.start_times.clear()
            self.counters.clear()
            self.gauges.clear()
            self.histograms.clear()
    
    import time
    return TestMetricsCollector()


# ================================================================
# PYTEST PLUGINS AND HOOKS
# ================================================================

def pytest_runtest_setup(item):
    """Setup before each test"""
    # Add any pre-test setup logic here
    pass


def pytest_runtest_teardown(item, nextitem):
    """Teardown after each test"""
    # Add any post-test cleanup logic here
    import gc
    gc.collect()  # Force garbage collection after each test


def pytest_sessionstart(session):
    """Called after the Session object has been created"""
    print("\n" + "="*80)
    print("TRAINING SERVICE TEST SESSION STARTING")
    print("="*80)


def pytest_sessionfinish(session, exitstatus):
    """Called after whole test run finished"""
    print("\n" + "="*80)
    print("TRAINING SERVICE TEST SESSION FINISHED")
    print(f"Exit Status: {exitstatus}")
    print("="*80)


# ================================================================
# FINAL CONFIGURATION
# ================================================================

# Ensure numpy doesn't use too many threads during testing
import numpy as np
np.seterr(all='ignore')  # Ignore numpy warnings during tests

# Configure pandas for testing
import pandas as pd
pd.set_option('display.max_columns', None)
pd.set_option('display.width', None)
pd.set_option('display.max_colwidth', 50)

# Set random seeds for reproducible tests
np.random.seed(42)
import random
random.seed(42)