//! Simple demonstration of Advanced mode capabilities
//!
//! This example shows how to use the Advanced mode coordinator
//! for enhanced ODE solving performance.

use scirs2_core::ndarray::{array, Array1, ArrayView1};
use scirs2_integrate::{
    mode_coordinator::{AdvancedModeConfig, AdvancedModeCoordinator},
    IntegrateResult,
};

#[allow(dead_code)]
fn main() -> Result<(), Box<dyn std::error::Error>> {
    println!("🚀 Advanced Mode Demonstration");
    println!("================================");

    // Create Advanced mode configuration with all optimizations enabled
    let config = AdvancedModeConfig {
        enable_gpu: true,
        enable_memory_optimization: true,
        enable_simd: true,
        enable_adaptive_optimization: true,
        enable_neural_rl: true,
        ..Default::default()
    };

    println!("✅ Created Advanced mode configuration");
    println!("   - GPU acceleration: {}", config.enable_gpu);
    println!(
        "   - Memory optimization: {}",
        config.enable_memory_optimization
    );
    println!("   - SIMD acceleration: {}", config.enable_simd);
    println!(
        "   - Adaptive optimization: {}",
        config.enable_adaptive_optimization
    );
    println!("   - Neural RL step control: {}", config.enable_neural_rl);

    // Create the Advanced mode coordinator
    println!("\n📊 Initializing Advanced mode coordinator...");
    let coordinator = AdvancedModeCoordinator::<f64>::new(config)?;
    println!("✅ Advanced mode coordinator initialized successfully");

    // Set up a simple ODE problem: dy/dt = -0.5 * y (exponential decay)
    let y_initial = array![2.0, 1.0, 0.5]; // Initial conditions
    let t = 0.0; // Initial time
    let h = 0.01; // Step size

    println!("\n🧮 Setting up ODE problem:");
    println!("   - Equation: dy/dt = -0.5 * y");
    println!("   - Initial conditions: {y_initial:?}");
    println!("   - Step size: {h}");

    // Define the ODE function: dy/dt = -0.5 * y
    let ode_function = |_t: f64, y: &ArrayView1<f64>| -> IntegrateResult<Array1<f64>> {
        Ok(y.mapv(|val| -0.5 * val))
    };

    // Perform advanced-optimized RK4 integration
    println!("\n⚡ Performing advanced-optimized RK4 integration...");
    let result = coordinator.advanced_rk4_integration(t, &y_initial.view(), h, ode_function)?;

    println!("✅ Integration completed successfully!");
    println!("\n📈 Results:");
    println!("   - Solution: {:?}", result.solution);
    println!(
        "   - Execution time: {:?}",
        result.performance_metrics.execution_time
    );
    println!(
        "   - Peak memory usage: {} bytes",
        result.performance_metrics.peak_memory_usage
    );
    println!(
        "   - GPU utilization: {:.1}%",
        result.performance_metrics.gpu_utilization
    );
    println!(
        "   - SIMD efficiency: {:.1}%",
        result.performance_metrics.simd_efficiency
    );
    println!(
        "   - Throughput: {:.1} ops/sec",
        result.performance_metrics.throughput
    );

    println!("\n🔧 Optimizations applied:");
    for optimization in &result.optimizations_applied {
        println!("   - {optimization}");
    }

    // Verify the solution is physically reasonable (should decay)
    let all_decreased = y_initial
        .iter()
        .zip(result.solution.iter())
        .all(|(initial, final_val)| final_val.abs() < initial.abs());

    if all_decreased {
        println!("\n✅ Solution verification: Values correctly decreased (exponential decay)");
    } else {
        println!("\n⚠️  Solution verification: Unexpected behavior in decay");
    }

    // Get performance report
    println!("\n📊 Generating performance report...");
    let performance_report = coordinator.get_performance_report()?;

    println!("✅ Performance Report:");
    println!(
        "   - Active components: {}",
        performance_report.components_active
    );
    println!(
        "   - Estimated speedup: {:.1}x",
        performance_report.estimated_speedup
    );
    println!(
        "   - Memory efficiency: {:.1}%",
        performance_report.memory_efficiency * 100.0
    );
    println!(
        "   - Power efficiency: {:.1}%",
        performance_report.power_efficiency * 100.0
    );

    println!("\n💡 Optimization recommendations:");
    for recommendation in &performance_report.recommendations {
        println!("   - {recommendation}");
    }

    println!("\n🎉 Advanced mode demonstration completed successfully!");
    println!("   All advanced-performance optimizations are active and functioning.");

    Ok(())
}
