# Initialize the MongoDB handler with your configuration
from Controllers.Mongo.database import mongo_handler
from datetime import datetime


def cleanup_test_data():
    """Clean up test data from all collections."""
    collections = ["users", "products", "orders", "sales"]
    for collection_name in collections:
        with mongo_handler.collection(collection_name) as collection:
            collection.delete_many({})


def test_basic_crud_operations():
    """Test basic CRUD operations on users collection."""
    print("\nTesting basic CRUD operations...")
    try:
        with mongo_handler.collection("users") as users_collection:
            # Insert multiple documents
            users_collection.insert_many([
                {"username": "john", "email": "john@example.com", "role": "user"},
                {"username": "jane", "email": "jane@example.com", "role": "admin"},
                {"username": "bob", "email": "bob@example.com", "role": "user"}
            ])

            # Find with multiple conditions
            admin_users = list(users_collection.find({"role": "admin"}))
            
            # Update multiple documents
            update_result = users_collection.update_many(
                {"role": "user"},
                {"$set": {"last_login": datetime.now().isoformat()}}
            )

            # Delete documents
            delete_result = users_collection.delete_many({"username": "bob"})

            success = (
                len(admin_users) == 1 and
                admin_users[0]["username"] == "jane" and
                update_result.modified_count == 2 and
                delete_result.deleted_count == 1
            )
            print(f"Test {'passed' if success else 'failed'}")
            return success
    except Exception as e:
        print(f"Test failed with exception: {e}")
        return False


def test_nested_documents():
    """Test operations with nested documents in products collection."""
    print("\nTesting nested documents...")
    try:
        with mongo_handler.collection("products") as products_collection:
            # Insert a product with nested data
            products_collection.insert_one({
                "name": "Laptop",
                "price": 999.99,
                "specs": {
                    "cpu": "Intel i7",
                    "ram": "16GB",
                    "storage": "512GB SSD"
                },
                "in_stock": True,
                "tags": ["electronics", "computers", "laptops"]
            })

            # Find with nested field query
            laptop = products_collection.find_one({"specs.cpu": "Intel i7"})

            # Update nested field
            update_result = products_collection.update_one(
                {"name": "Laptop"},
                {"$set": {"specs.ram": "32GB"}}
            )

            # Verify the update
            updated_laptop = products_collection.find_one({"name": "Laptop"})

            success = (
                laptop is not None and
                laptop["specs"]["ram"] == "16GB" and
                update_result.modified_count == 1 and
                updated_laptop["specs"]["ram"] == "32GB"
            )
            print(f"Test {'passed' if success else 'failed'}")
            return success
    except Exception as e:
        print(f"Test failed with exception: {e}")
        return False


def test_array_operations():
    """Test operations with arrays in orders collection."""
    print("\nTesting array operations...")
    try:
        with mongo_handler.collection("orders") as orders_collection:
            # Insert an order with array of items
            orders_collection.insert_one({
                "order_id": "ORD001",
                "customer": "john",
                "items": [
                    {"product": "Laptop", "quantity": 1},
                    {"product": "Mouse", "quantity": 2}
                ],
                "total": 1099.99,
                "status": "pending"
            })

            # Find orders containing specific items
            laptop_orders = list(orders_collection.find({"items.product": "Laptop"}))

            # Update array elements
            update_result = orders_collection.update_one(
                {"order_id": "ORD001"},
                {"$push": {"items": {"product": "Keyboard", "quantity": 1}}}
            )

            # Verify the update
            updated_order = orders_collection.find_one({"order_id": "ORD001"})

            success = (
                len(laptop_orders) == 1 and
                update_result.modified_count == 1 and
                len(updated_order["items"]) == 3 and
                updated_order["items"][-1]["product"] == "Keyboard"
            )
            print(f"Test {'passed' if success else 'failed'}")
            return success
    except Exception as e:
        print(f"Test failed with exception: {e}")
        return False


def test_aggregation():
    """Test aggregation operations on sales collection."""
    print("\nTesting aggregation operations...")
    try:
        with mongo_handler.collection("sales") as sales_collection:
            # Insert sample sales data
            sales_collection.insert_many([
                {"product": "Laptop", "amount": 999.99, "date": datetime.now()},
                {"product": "Mouse", "amount": 29.99, "date": datetime.now()},
                {"product": "Keyboard", "amount": 59.99, "date": datetime.now()}
            ])

            # Calculate total sales by product
            pipeline = [
                {"$group": {"_id": "$product", "total": {"$sum": "$amount"}}}
            ]
            sales_summary = list(sales_collection.aggregate(pipeline))

            success = (
                len(sales_summary) == 3 and
                any(item["_id"] == "Laptop" and item["total"] == 999.99 for item in sales_summary) and
                any(item["_id"] == "Mouse" and item["total"] == 29.99 for item in sales_summary) and
                any(item["_id"] == "Keyboard" and item["total"] == 59.99 for item in sales_summary)
            )
            print(f"Test {'passed' if success else 'failed'}")
            return success
    except Exception as e:
        print(f"Test failed with exception: {e}")
        return False


def test_index_operations():
    """Test index creation and unique constraints."""
    print("\nTesting index operations...")
    try:
        with mongo_handler.collection("users") as users_collection:
            # Create indexes
            users_collection.create_index("email", unique=True)
            users_collection.create_index([("username", 1), ("role", 1)])

            # Insert initial document
            users_collection.insert_one({"username": "test_user", "email": "test@example.com"})

            # Try to insert duplicate email (should fail)
            try:
                users_collection.insert_one({"username": "test_user2", "email": "test@example.com"})
                success = False  # Should not reach here
            except Exception:
                success = True

            print(f"Test {'passed' if success else 'failed'}")
            return success
    except Exception as e:
        print(f"Test failed with exception: {e}")
        return False


def test_complex_queries():
    """Test complex queries with multiple conditions."""
    print("\nTesting complex queries...")
    try:
        with mongo_handler.collection("products") as products_collection:
            # Insert test data
            products_collection.insert_many([
                {
                    "name": "Expensive Laptop",
                    "price": 999.99,
                    "tags": ["electronics", "computers"],
                    "in_stock": True
                },
                {
                    "name": "Cheap Mouse",
                    "price": 29.99,
                    "tags": ["electronics", "peripherals"],
                    "in_stock": True
                }
            ])

            # Find products with price range and specific tags
            expensive_electronics = list(products_collection.find({
                "price": {"$gt": 500},
                "tags": {"$in": ["electronics"]},
                "in_stock": True
            }))

            # Update with multiple conditions
            update_result = products_collection.update_many(
                {
                    "price": {"$lt": 100},
                    "in_stock": True
                },
                {
                    "$set": {"discount": 0.1},
                    "$inc": {"price": -10}
                }
            )

            # Verify the update
            updated_product = products_collection.find_one({"name": "Cheap Mouse"})

            success = (
                len(expensive_electronics) == 1 and
                expensive_electronics[0]["name"] == "Expensive Laptop" and
                update_result.modified_count == 1 and
                updated_product["price"] == 19.99 and
                updated_product["discount"] == 0.1
            )
            print(f"Test {'passed' if success else 'failed'}")
            return success
    except Exception as e:
        print(f"Test failed with exception: {e}")
        return False


def run_all_tests():
    """Run all MongoDB tests and report results."""
    print("Starting MongoDB tests...")
    
    # Clean up any existing test data before starting
    cleanup_test_data()
    
    tests = [
        test_basic_crud_operations,
        test_nested_documents,
        test_array_operations,
        test_aggregation,
        test_index_operations,
        test_complex_queries
    ]
    
    passed_list, not_passed_list = [], []
    passed, failed = 0, 0

    for test in tests:
        # Clean up test data before each test
        cleanup_test_data()
        try:
            if test():
                passed += 1
                passed_list.append(f"Test {test.__name__} passed")
            else:
                failed += 1
                not_passed_list.append(f"Test {test.__name__} failed")
        except Exception as e:
            print(f"Test {test.__name__} failed with exception: {e}")
            failed += 1
            not_passed_list.append(f"Test {test.__name__} failed")

    print(f"\nTest Results: {passed} passed, {failed} failed")
    print('Passed Tests:')
    print("\n".join(passed_list))
    print('Failed Tests:')
    print("\n".join(not_passed_list))

    return passed, failed


if __name__ == "__main__":
    run_all_tests()