"""
Pytest configuration and shared fixtures for detector worker tests.
"""
import pytest
import tempfile
import os
from unittest.mock import Mock, MagicMock, patch
from typing import Dict, Any, Generator

# Add the project root to the path so we can import detector_worker
import sys
from pathlib import Path
project_root = Path(__file__).parent.parent
sys.path.insert(0, str(project_root))

from detector_worker.core.config import get_config_manager, ConfigurationManager
from detector_worker.core.dependency_injection import get_container, DetectorWorkerContainer
from detector_worker.core.singleton_managers import (
    ModelStateManager, StreamStateManager, SessionStateManager,
    CacheStateManager, CameraStateManager, PipelineStateManager
)


@pytest.fixture
def temp_dir():
    """Create a temporary directory for tests."""
    with tempfile.TemporaryDirectory() as tmpdir:
        yield tmpdir


@pytest.fixture
def mock_config():
    """Mock configuration data for tests."""
    return {
        "poll_interval_ms": 100,
        "max_streams": 5,
        "target_fps": 10,
        "reconnect_interval_sec": 5,
        "max_retries": 3,
        "heartbeat_interval": 2,
        "session_timeout": 600,
        "models_dir": "models",
        "log_level": "INFO",
        "database": {
            "enabled": False,
            "host": "localhost",
            "port": 5432,
            "database": "test_db",
            "username": "test_user",
            "password": "test_pass",
            "schema": "public"
        },
        "redis": {
            "enabled": False,
            "host": "localhost",
            "port": 6379,
            "password": None,
            "db": 0
        }
    }


@pytest.fixture
def mock_detection_result():
    """Mock detection result for tests."""
    return {
        "class": "car",
        "confidence": 0.85,
        "bbox": [100, 200, 300, 400],
        "id": 12345,
        "branch_results": {}
    }


@pytest.fixture
def mock_frame():
    """Mock frame data for tests."""
    import numpy as np
    return np.zeros((480, 640, 3), dtype=np.uint8)


@pytest.fixture
def mock_model_tree():
    """Mock model tree structure for tests."""
    return {
        "modelId": "test_model_v1",
        "modelFile": "test_model.pt",
        "multiClass": True,
        "expectedClasses": ["car", "truck"],
        "triggerClasses": ["car"],
        "minConfidence": 0.8,
        "branches": [],
        "actions": []
    }


@pytest.fixture
def mock_pipeline_context():
    """Mock pipeline context for tests."""
    return {
        "camera_id": "test_camera_001",
        "display_id": "display_001",
        "session_id": "session_12345",
        "timestamp": 1640995200000,
        "subscription_id": "sub_001"
    }


@pytest.fixture(autouse=True)
def reset_singletons():
    """Reset singleton managers before each test."""
    # Clear all singleton state before each test
    yield
    
    # Cleanup after test
    try:
        ModelStateManager().clear_all()
        StreamStateManager().clear_all()
        SessionStateManager().clear_all()
        CacheStateManager().clear_all()
        CameraStateManager().clear_all()
        PipelineStateManager().clear_all()
    except Exception:
        pass  # Ignore cleanup errors


@pytest.fixture
def isolated_config_manager(temp_dir, mock_config):
    """Create an isolated configuration manager for testing."""
    config_file = os.path.join(temp_dir, "test_config.json")
    
    import json
    with open(config_file, 'w') as f:
        json.dump(mock_config, f)
    
    # Create a fresh ConfigurationManager for testing
    from detector_worker.core.config import JsonFileProvider, EnvironmentProvider
    
    manager = ConfigurationManager()
    manager._providers.clear()  # Remove default providers
    manager.add_provider(JsonFileProvider(config_file))
    
    return manager


@pytest.fixture
def mock_websocket():
    """Mock WebSocket for testing."""
    mock_ws = Mock()
    mock_ws.accept = Mock()
    mock_ws.send_text = Mock()
    mock_ws.send_json = Mock()
    mock_ws.receive_text = Mock()
    mock_ws.receive_json = Mock()
    mock_ws.close = Mock()
    mock_ws.client_state = Mock()
    mock_ws.client_state.DISCONNECTED = False
    return mock_ws


@pytest.fixture
def mock_redis_client():
    """Mock Redis client for testing."""
    mock_redis = Mock()
    mock_redis.get = Mock(return_value=None)
    mock_redis.set = Mock(return_value=True)
    mock_redis.delete = Mock(return_value=1)
    mock_redis.exists = Mock(return_value=0)
    mock_redis.expire = Mock(return_value=True)
    mock_redis.publish = Mock(return_value=1)
    return mock_redis


@pytest.fixture
def mock_database_connection():
    """Mock database connection for testing."""
    mock_conn = Mock()
    mock_cursor = Mock()
    
    mock_cursor.execute = Mock()
    mock_cursor.fetchone = Mock(return_value=None)
    mock_cursor.fetchall = Mock(return_value=[])
    mock_cursor.fetchmany = Mock(return_value=[])
    mock_cursor.rowcount = 1
    
    mock_conn.cursor = Mock(return_value=mock_cursor)
    mock_conn.commit = Mock()
    mock_conn.rollback = Mock()
    mock_conn.close = Mock()
    
    return mock_conn


@pytest.fixture
def mock_yolo_model():
    """Mock YOLO model for testing."""
    mock_model = Mock()
    
    # Mock results with boxes
    mock_result = Mock()
    mock_result.boxes = Mock()
    mock_result.boxes.data = Mock()
    mock_result.boxes.conf = Mock()
    mock_result.boxes.cls = Mock()
    mock_result.boxes.id = Mock()
    
    # Mock track method
    mock_model.track = Mock(return_value=[mock_result])
    mock_model.predict = Mock(return_value=[mock_result])
    
    return mock_model


@pytest.fixture
def sample_detection_data():
    """Sample detection data for testing."""
    return [
        {
            "class": "car",
            "confidence": 0.92,
            "bbox": [100, 150, 250, 300],
            "id": 1001,
            "branch_results": {}
        },
        {
            "class": "truck", 
            "confidence": 0.87,
            "bbox": [300, 200, 450, 350],
            "id": 1002,
            "branch_results": {}
        }
    ]


@pytest.fixture
def sample_session_data():
    """Sample session data for testing."""
    return {
        "session_id": "session_test_001",
        "display_id": "display_test_001", 
        "camera_id": "camera_test_001",
        "created_at": 1640995200.0,
        "last_activity": 1640995200.0,
        "detection_data": {
            "car_brand": "Toyota",
            "car_model": "Camry",
            "license_plate": "ABC-123"
        }
    }


# Helper functions for tests
def create_mock_detection_result(class_name: str = "car", confidence: float = 0.85, track_id: int = 1001):
    """Helper function to create mock detection results."""
    return {
        "class": class_name,
        "confidence": confidence,
        "bbox": [100, 200, 300, 400],
        "id": track_id,
        "branch_results": {}
    }


def create_mock_regions_dict(detections: list = None):
    """Helper function to create mock regions dictionary."""
    if detections is None:
        detections = [create_mock_detection_result()]
    
    regions = {}
    for det in detections:
        regions[det["class"]] = {
            "bbox": det["bbox"],
            "confidence": det["confidence"],
            "detection": det
        }
    return regions