#![allow(unused_crate_dependencies)]
//! Integration tests for TLOB model integration
//! Tests the complete TLOB functionality within adaptive-strategy

use adaptive_strategy::models::{ModelConfig, ModelFactory};
use std::time::Instant;

/// Create test order book features matching TLOB requirements
fn create_test_tlob_features() -> Vec<f64> {
    let mut features = Vec::with_capacity(51);

    // Bid prices (10 levels, decreasing)
    for i in 0..10 {
        features.push(100.0 - (i as f64 * 0.01));
    }

    // Ask prices (10 levels, increasing)
    for i in 0..10 {
        features.push(100.01 + (i as f64 * 0.01));
    }

    // Bid volumes (10 levels)
    for i in 0..10 {
        features.push(1000.0 + (i as f64 * 100.0));
    }

    // Ask volumes (10 levels)
    for i in 0..10 {
        features.push(1100.0 + (i as f64 * 100.0));
    }

    // Market data: last_price, volume, volatility, momentum
    features.extend_from_slice(&[100.005, 5000.0, 0.02, 0.001]);

    // Microstructure features (7 values)
    features.extend_from_slice(&[0.1, 0.2, 0.15, 0.3, 0.25, 0.05, 0.08]);

    assert_eq!(features.len(), 51);
    features
}

#[tokio::test]
async fn test_tlob_model_creation() {
    let config = ModelConfig::default();

    let result =
        ModelFactory::create_model("tlob", "test_tlob_integration".to_string(), config).await;

    assert!(result.is_ok(), "Should be able to create TLOB model");

    let model = result.unwrap();
    assert_eq!(model.name(), "test_tlob_integration");
    assert_eq!(model.model_type(), "tlob");
    assert!(model.is_ready());
}

#[tokio::test]
async fn test_tlob_prediction_functionality() {
    let config = ModelConfig::default();
    let model = ModelFactory::create_model("tlob", "test_prediction".to_string(), config)
        .await
        .unwrap();

    let features = create_test_tlob_features();
    let result = model.predict(&features).await;

    assert!(result.is_ok(), "TLOB prediction should succeed");

    let prediction = result.unwrap();

    // Validate prediction structure
    assert!(prediction.confidence >= 0.0 && prediction.confidence <= 1.0);
    assert!(!prediction.features_used.is_empty());

    // Check metadata
    if let Some(metadata) = prediction.metadata {
        assert!(metadata.contains_key("model_type"));
        assert_eq!(metadata["model_type"], "tlob");
        assert!(metadata.contains_key("extraction_time_ns"));
    }
}

#[tokio::test]
async fn test_tlob_performance_target() {
    let config = ModelConfig::default();
    let model = ModelFactory::create_model("tlob", "test_performance".to_string(), config)
        .await
        .unwrap();

    let features = create_test_tlob_features();

    // Warm up the model
    for _ in 0..5 {
        let _ = model.predict(&features).await.unwrap();
    }

    // Measure performance over multiple predictions
    let mut total_time_ns = 0u64;
    let iterations = 100;

    for _ in 0..iterations {
        let start = Instant::now();
        let _result = model.predict(&features).await.unwrap();
        total_time_ns += start.elapsed().as_nanos() as u64;
    }

    let avg_time_ns = total_time_ns / iterations;
    let avg_time_us = avg_time_ns as f64 / 1000.0;

    println!("Average prediction time: {:.2}μs", avg_time_us);

    // Verify sub-50μs target (with some tolerance for test environment)
    assert!(
        avg_time_us < 100.0,
        "Average prediction time {:.2}μs should be reasonable (target <50μs)",
        avg_time_us
    );
}

#[tokio::test]
async fn test_tlob_model_metadata() {
    let config = ModelConfig::default();
    let model = ModelFactory::create_model("tlob", "test_metadata".to_string(), config)
        .await
        .unwrap();

    let metadata = model.get_metadata();

    assert_eq!(metadata.model_type, "tlob");
    assert_eq!(metadata.input_dimensions, 51);
    assert!(metadata.description.is_some());
    assert!(metadata.description.unwrap().contains("TLOB"));

    // Check parameters
    assert!(metadata.parameters.contains_key("feature_dim"));
    assert!(metadata.parameters.contains_key("prediction_horizon"));
}

#[tokio::test]
async fn test_tlob_model_performance_metrics() {
    let config = ModelConfig::default();
    let model = ModelFactory::create_model("tlob", "test_metrics".to_string(), config)
        .await
        .unwrap();

    let features = create_test_tlob_features();

    // Make some predictions
    for _ in 0..10 {
        let _ = model.predict(&features).await.unwrap();
    }

    let performance = model.get_performance().await.unwrap();

    assert!(performance.accuracy >= 0.0 && performance.accuracy <= 1.0);
    assert!(performance.prediction_count >= 10);
}

#[tokio::test]
async fn test_tlob_invalid_features() {
    let config = ModelConfig::default();
    let model = ModelFactory::create_model("tlob", "test_invalid".to_string(), config)
        .await
        .unwrap();

    // Test with insufficient features
    let invalid_features = vec![1.0; 30]; // Only 30 features instead of 51
    let result = model.predict(&invalid_features).await;

    assert!(result.is_err(), "Should fail with insufficient features");
}

#[tokio::test]
async fn test_tlob_model_memory_usage() {
    let config = ModelConfig::default();
    let model = ModelFactory::create_model("tlob", "test_memory".to_string(), config)
        .await
        .unwrap();

    let memory_usage = model.memory_usage();
    assert!(
        memory_usage > 0,
        "Model should report non-zero memory usage"
    );
    assert!(
        memory_usage < 100 * 1024 * 1024,
        "Memory usage should be reasonable (<100MB)"
    );
}

#[tokio::test]
async fn test_tlob_model_configuration() {
    let mut config = ModelConfig::default();
    config.batch_size = 16;
    config.custom_parameters.insert(
        "prediction_horizon".to_string(),
        serde_json::Value::Number(serde_json::Number::from(5)),
    );

    let model = ModelFactory::create_model("tlob", "test_config".to_string(), config)
        .await
        .unwrap();

    let metadata = model.get_metadata();
    assert_eq!(
        metadata.parameters["prediction_horizon"].as_u64().unwrap(),
        5
    );
}

#[tokio::test]
async fn test_tlob_concurrent_predictions() {
    let config = ModelConfig::default();
    let model = std::sync::Arc::new(
        ModelFactory::create_model("tlob", "test_concurrent".to_string(), config)
            .await
            .unwrap(),
    );

    let features = create_test_tlob_features();
    let mut tasks = Vec::new();

    // Launch concurrent prediction tasks
    for _i in 0..4 {
        let model_clone = model.clone();
        let features_clone = features.clone();

        let task = tokio::spawn(async move { model_clone.predict(&features_clone).await.unwrap() });

        tasks.push(task);
    }

    // Wait for all predictions to complete
    let results = futures::future::join_all(tasks).await;

    assert_eq!(results.len(), 4);
    for result in results {
        assert!(result.is_ok(), "Concurrent prediction should succeed");
    }
}

#[tokio::test]
async fn test_model_factory_available_models() {
    let available = ModelFactory::available_models();
    assert!(
        available.contains(&"tlob"),
        "TLOB should be in available models"
    );
}

// Performance stress test
#[tokio::test]
async fn test_tlob_sustained_load() {
    let config = ModelConfig::default();
    let model = ModelFactory::create_model("tlob", "test_sustained".to_string(), config)
        .await
        .unwrap();

    let features = create_test_tlob_features();

    // Sustained prediction load
    let start_time = Instant::now();
    let prediction_count = 1000;

    for _ in 0..prediction_count {
        let result = model.predict(&features).await;
        assert!(result.is_ok(), "Sustained predictions should not fail");
    }

    let elapsed = start_time.elapsed();
    let avg_per_prediction = elapsed.as_nanos() as f64 / prediction_count as f64 / 1000.0;

    println!(
        "Sustained load: {} predictions in {:.2}ms (avg {:.2}μs per prediction)",
        prediction_count,
        elapsed.as_millis(),
        avg_per_prediction
    );

    // Verify reasonable performance under sustained load
    assert!(
        avg_per_prediction < 200.0,
        "Average prediction time under sustained load should be reasonable"
    );
}