/**
 * ContainerBenchmark - Benchmarks for Container entity operations
 * 
 * Measures performance of container creation, child enumeration,
 * and deletion operations.
 * 
 * @version 0.1
 * @since 0.1
 */

namespace Implexus.Tools.Perf {

/**
 * Benchmark for Container entity operations.
 * 
 * Tests:
 * - create_container: Creating new containers
 * - get_children: Enumerating container children
 * - get_child: Getting individual child by name
 * - delete_container: Deleting containers (tracked for deferred cleanup)
 */
public class ContainerBenchmark : Benchmark {
    
    /**
     * {@inheritDoc}
     */
    public override string name { get { return "Container"; } }
    
    /**
     * Creates a new ContainerBenchmark.
     * 
     * @param engine The engine to benchmark
     * @param config The benchmark configuration
     */
    public ContainerBenchmark(Core.Engine engine, BenchmarkConfig config) {
        base(engine, config);
    }
    
    /**
     * {@inheritDoc}
     */
    public override async void run_async(Results results) throws Error {
        var parent_path = new Core.EntityPath("/perf-test");
        var containers_path = parent_path.append_child("containers");
        
        // Ensure parent container exists
        yield ensure_container_async(parent_path, "perf-test");
        _cleanup_tracker.add_container(parent_path.to_string());
        
        // Create a dedicated container for our tests
        yield cleanup_path_async(containers_path);
        var root = yield _engine.get_root_async();
        var perf_test = yield root.get_child_async("perf-test");
        var containers = yield perf_test.create_container_async("containers");
        _cleanup_tracker.add_container(containers_path.to_string());
        
        int iterations = _config.iterations;
        
        // Test 1: Create containers
        print("  Testing create_container (%d iterations)...\n", iterations);
        var create_op = new CreateContainerOperation(this, containers_path, containers);
        var create_result = yield measure_async("create_container", iterations, create_op);
        results.add(name, create_result);
        
        // Test 2: Get container children
        print("  Testing get_children (%d iterations)...\n", iterations);
        var get_op = new GetChildrenOperation(containers);
        var get_result = yield measure_async("get_children", iterations, get_op);
        results.add(name, get_result);
        
        // Test 3: Get individual child by name
        print("  Testing get_child (%d iterations)...\n", iterations);
        var get_child_op = new GetChildOperation(containers, iterations);
        var get_child_result = yield measure_async("get_child", iterations, get_child_op);
        results.add(name, get_child_result);
        
        // Test 4: Delete containers (still tracked for deferred cleanup)
        print("  Testing delete_container (%d iterations)...\n", iterations);
        var delete_op = new DeleteContainerOperation(this, _engine, containers_path);
        var delete_result = yield measure_async("delete_container", iterations, delete_op);
        results.add(name, delete_result);
    }
}

// Operation classes for ContainerBenchmark

private class CreateContainerOperation : AsyncOperation {
    private ContainerBenchmark _benchmark;
    private Core.EntityPath _containers_path;
    private Core.Entity _containers;
    
    public CreateContainerOperation(ContainerBenchmark benchmark, Core.EntityPath containers_path, Core.Entity containers) {
        _benchmark = benchmark;
        _containers_path = containers_path;
        _containers = containers;
    }
    
    public override async void execute_async() throws Error {
        var container_name = "container-%d".printf(iteration);
        var container_path = _containers_path.append_child(container_name);
        // Clean up before creating to ensure consistent state
        yield _benchmark.cleanup_path_async(container_path);
        yield _containers.create_container_async(container_name);
        // Track for deferred cleanup
        _benchmark._cleanup_tracker.add_container(container_path.to_string());
    }
}

private class GetChildrenOperation : AsyncOperation {
    private Core.Entity _containers;
    
    public GetChildrenOperation(Core.Entity containers) {
        _containers = containers;
    }
    
    public override async void execute_async() throws Error {
        var children = yield _containers.get_children_async();
        // Force enumeration by counting
        int count = 0;
        foreach (var child in children) {
            count++;
        }
    }
}

private class GetChildOperation : AsyncOperation {
    private Core.Entity _containers;
    private int _total_iterations;
    
    public GetChildOperation(Core.Entity containers, int total_iterations) {
        _containers = containers;
        _total_iterations = total_iterations;
    }
    
    public override async void execute_async() throws Error {
        var container_name = "container-%d".printf(iteration % _total_iterations);
        var child = yield _containers.get_child_async(container_name);
    }
}

private class DeleteContainerOperation : AsyncOperation {
    private ContainerBenchmark _benchmark;
    private Core.Engine _engine;
    private Core.EntityPath _containers_path;
    
    public DeleteContainerOperation(ContainerBenchmark benchmark, Core.Engine engine, Core.EntityPath containers_path) {
        _benchmark = benchmark;
        _engine = engine;
        _containers_path = containers_path;
    }
    
    public override async void execute_async() throws Error {
        var container_name = "container-%d".printf(iteration);
        var path = _containers_path.append_child(container_name);
        var entity = yield _engine.get_entity_or_null_async(path);
        if (entity != null) {
            yield ((!) entity).delete_async();
        }
    }
}

}