//! Performance Audit CLI Tool
//! 
//! This CLI tool provides comprehensive performance auditing for leptos-shadcn-ui components.

use clap::{Parser, Subcommand};
use leptos_shadcn_performance_audit::*;
use std::path::PathBuf;
use std::time::Duration;

/// Performance Audit CLI for leptos-shadcn-ui
#[derive(Parser)]
#[command(name = "performance-audit")]
#[command(about = "Comprehensive performance auditing for leptos-shadcn-ui components")]
#[command(version)]
struct Cli {
    #[command(subcommand)]
    command: Commands,
    
    /// Verbose output
    #[arg(short, long)]
    verbose: bool,
    
    /// Output format
    #[arg(short, long, default_value = "text")]
    format: OutputFormat,
}

/// Available commands
#[derive(Subcommand)]
enum Commands {
    /// Run complete performance audit
    Audit {
        /// Components directory path
        #[arg(short, long, default_value = "packages/leptos")]
        _components_path: PathBuf,
        
        /// Maximum component size in KB
        #[arg(long, default_value = "5.0")]
        max_component_size_kb: f64,
        
        /// Maximum render time in milliseconds
        #[arg(long, default_value = "16.0")]
        max_render_time_ms: f64,
        
        /// Maximum memory usage in MB
        #[arg(long, default_value = "1.0")]
        max_memory_usage_mb: f64,
    },
    
    /// Analyze bundle sizes
    Bundle {
        /// Components directory path
        #[arg(short, long, default_value = "packages/leptos")]
        _components_path: PathBuf,
        
        /// Target bundle size in KB
        #[arg(long, default_value = "5.0")]
        _target_size_kb: f64,
    },
    
    /// Monitor performance
    Monitor {
        /// Monitoring duration in seconds
        #[arg(short, long, default_value = "60")]
        duration: u64,
        
        /// Sample rate in milliseconds
        #[arg(long, default_value = "100")]
        sample_rate: u64,
    },
    
    /// Run benchmarks
    Benchmark {
        /// Benchmark iterations
        #[arg(short, long, default_value = "100")]
        iterations: u32,
        
        /// Target execution time in milliseconds
        #[arg(long, default_value = "16")]
        target_time: u64,
    },
    
    /// Generate optimization roadmap
    Roadmap {
        /// Input file with performance data
        #[arg(short, long)]
        input: Option<PathBuf>,
        
        /// Output file for roadmap
        #[arg(short, long)]
        output: Option<PathBuf>,
    },
}

/// Output format options
#[derive(Clone, clap::ValueEnum)]
#[derive(Debug)]
enum OutputFormat {
    Text,
    Json,
    Html,
    Markdown,
}

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let cli = Cli::parse();
    
    // Initialize logging
    if cli.verbose {
        env_logger::Builder::from_default_env()
            .filter_level(log::LevelFilter::Debug)
            .init();
    } else {
        env_logger::Builder::from_default_env()
            .filter_level(log::LevelFilter::Info)
            .init();
    }
    
    match cli.command {
        Commands::Audit {
            _components_path,
            max_component_size_kb,
            max_render_time_ms,
            max_memory_usage_mb,
        } => {
            run_audit_command(
                _components_path,
                max_component_size_kb,
                max_render_time_ms,
                max_memory_usage_mb,
                &cli.format,
            ).await?;
        }
        
        Commands::Bundle {
            _components_path,
            _target_size_kb,
        } => {
            run_bundle_command(_components_path, _target_size_kb, &cli.format).await?;
        }
        
        Commands::Monitor { duration, sample_rate } => {
            run_monitor_command(duration, sample_rate, &cli.format).await?;
        }
        
        Commands::Benchmark {
            iterations,
            target_time,
        } => {
            run_benchmark_command(iterations, target_time, &cli.format).await?;
        }
        
        Commands::Roadmap { input, output } => {
            run_roadmap_command(input, output, &cli.format).await?;
        }
    }
    
    Ok(())
}

/// Run complete audit command
async fn run_audit_command(
    _components_path: PathBuf,
    max_component_size_kb: f64,
    max_render_time_ms: f64,
    max_memory_usage_mb: f64,
    format: &OutputFormat,
) -> Result<(), Box<dyn std::error::Error>> {
    println!("🔍 Running comprehensive performance audit...");
    println!("📊 Configuration:");
    println!("   Max Component Size: {:.1} KB", max_component_size_kb);
    println!("   Max Render Time: {:.1} ms", max_render_time_ms);
    println!("   Max Memory Usage: {:.1} MB", max_memory_usage_mb);
    println!("   Output Format: {:?}", format);
    println!();
    
    let config = PerformanceConfig {
        max_component_size_kb,
        max_render_time_ms,
        max_memory_usage_mb,
        monitoring_enabled: true,
    };
    
    // Run performance audit with progress indication
    println!("⏳ Analyzing components...");
    let results = run_performance_audit(config).await
        .map_err(|e| format!("Performance audit failed: {}", e))?;
    println!("✅ Analysis complete!");
    println!();
    
    // Output results based on format
    match format {
        OutputFormat::Text => output_text_results(&results),
        OutputFormat::Json => output_json_results(&results)?,
        OutputFormat::Html => output_html_results(&results)?,
        OutputFormat::Markdown => output_markdown_results(&results)?,
    }
    
    // Exit with appropriate code
    if results.meets_targets() {
        println!("✅ Performance audit passed!");
        std::process::exit(0);
    } else {
        println!("❌ Performance audit failed!");
        std::process::exit(1);
    }
}

/// Run bundle analysis command
async fn run_bundle_command(
    _components_path: PathBuf,
    _target_size_kb: f64,
    format: &OutputFormat,
) -> Result<(), Box<dyn std::error::Error>> {
    println!("📦 Analyzing bundle sizes...");
    
    let analyzer = bundle_analysis::BundleAnalyzer::new(_components_path);
    let results = analyzer.analyze_all_components().await;
    
    match format {
        OutputFormat::Text => output_bundle_text_results(&results),
        OutputFormat::Json => output_bundle_json_results(&results)?,
        OutputFormat::Html => output_bundle_html_results(&results)?,
        OutputFormat::Markdown => output_bundle_markdown_results(&results)?,
    }
    
    if results.meets_targets() {
        println!("✅ Bundle analysis passed!");
        std::process::exit(0);
    } else {
        println!("❌ Bundle analysis failed!");
        std::process::exit(1);
    }
}

/// Run performance monitoring command
async fn run_monitor_command(
    duration: u64,
    sample_rate: u64,
    format: &OutputFormat,
) -> Result<(), Box<dyn std::error::Error>> {
    println!("📊 Monitoring performance for {} seconds...", duration);
    
    let config = performance_monitoring::PerformanceConfig {
        max_render_time_ms: 16.0,
        max_memory_usage_bytes: 1024 * 1024,
        monitoring_duration: Duration::from_secs(duration),
        sample_rate: Duration::from_millis(sample_rate),
    };
    
    let mut monitor = performance_monitoring::PerformanceMonitor::new(config);
    monitor.start_monitoring();
    
    // Simulate monitoring (in real implementation, this would monitor actual components)
    tokio::time::sleep(Duration::from_secs(duration)).await;
    
    let results = monitor.stop_monitoring();
    
    match format {
        OutputFormat::Text => output_monitoring_text_results(&results),
        OutputFormat::Json => output_monitoring_json_results(&results)?,
        OutputFormat::Html => output_monitoring_html_results(&results)?,
        OutputFormat::Markdown => output_monitoring_markdown_results(&results)?,
    }
    
    if results.meets_targets() {
        println!("✅ Performance monitoring passed!");
        std::process::exit(0);
    } else {
        println!("❌ Performance monitoring failed!");
        std::process::exit(1);
    }
}

/// Run benchmark command
async fn run_benchmark_command(
    iterations: u32,
    target_time: u64,
    format: &OutputFormat,
) -> Result<(), Box<dyn std::error::Error>> {
    println!("🏃 Running benchmarks with {} iterations...", iterations);
    
    let config = benchmarks::BenchmarkConfig {
        warmup_iterations: 10,
        benchmark_iterations: iterations,
        target_time: Duration::from_millis(target_time),
        enable_memory_profiling: true,
        enable_statistical_analysis: true,
    };
    
    let mut runner = benchmarks::BenchmarkRunner::new(config);
    
    // Register mock benchmarks for testing
    let fast_benchmark = Box::new(benchmarks::MockBenchmark {
        name: "fast-render".to_string(),
        component_name: "button".to_string(),
        execution_time: Duration::from_millis(8),
        memory_usage: 1024,
    });
    
    let slow_benchmark = Box::new(benchmarks::MockBenchmark {
        name: "slow-render".to_string(),
        component_name: "table".to_string(),
        execution_time: Duration::from_millis(24),
        memory_usage: 4096,
    });
    
    runner.register_benchmark(fast_benchmark);
    runner.register_benchmark(slow_benchmark);
    
    let results = runner.run_all_benchmarks().await;
    
    match format {
        OutputFormat::Text => output_benchmark_text_results(&results),
        OutputFormat::Json => output_benchmark_json_results(&results)?,
        OutputFormat::Html => output_benchmark_html_results(&results)?,
        OutputFormat::Markdown => output_benchmark_markdown_results(&results)?,
    }
    
    if results.meets_targets() {
        println!("✅ Benchmarks passed!");
        std::process::exit(0);
    } else {
        println!("❌ Benchmarks failed!");
        std::process::exit(1);
    }
}

/// Run roadmap generation command
async fn run_roadmap_command(
    _input: Option<PathBuf>,
    _output: Option<PathBuf>,
    format: &OutputFormat,
) -> Result<(), Box<dyn std::error::Error>> {
    println!("🗺️ Generating optimization roadmap...");
    
    // For now, generate a sample roadmap
    // In real implementation, this would load data from input file
    let mut roadmap = optimization_roadmap::OptimizationRoadmap::default();
    
    let recommendation = optimization_roadmap::OptimizationRecommendation::new(
        "sample-optimization".to_string(),
        "button".to_string(),
        optimization_roadmap::OptimizationCategory::BundleSize,
        optimization_roadmap::OptimizationPriority::High,
        "Optimize button component".to_string(),
        "Reduce bundle size and improve performance".to_string(),
    )
    .with_impact(85.0)
    .with_effort(4.0)
    .add_implementation_step("Analyze dependencies".to_string())
    .add_implementation_step("Implement code splitting".to_string())
    .add_success_criteria("Bundle size < 5KB".to_string());
    
    roadmap.add_recommendation(recommendation);
    
    match format {
        OutputFormat::Text => output_roadmap_text_results(&roadmap),
        OutputFormat::Json => output_roadmap_json_results(&roadmap)?,
        OutputFormat::Html => output_roadmap_html_results(&roadmap)?,
        OutputFormat::Markdown => output_roadmap_markdown_results(&roadmap)?,
    }
    
    println!("✅ Optimization roadmap generated!");
    Ok(())
}

// Output functions (implementations will be added in Green phase)

fn output_text_results(results: &PerformanceResults) {
    println!("📊 Performance Audit Results");
    println!("Overall Score: {:.1}/100 ({})", results.overall_score, results.get_grade());
    println!("Meets Targets: {}", if results.meets_targets() { "✅ Yes" } else { "❌ No" });
    println!();
    
    println!("📦 Bundle Analysis:");
    println!("  Overall Efficiency: {:.1}%", results.bundle_analysis.overall_efficiency_score);
    println!("  Total Size: {:.1} KB", results.bundle_analysis.total_bundle_size_kb);
    println!("  Average Component Size: {:.1} KB", results.bundle_analysis.average_component_size_kb);
    println!();
    
    println!("⚡ Performance Monitoring:");
    println!("  Overall Score: {:.1}%", results.performance_monitoring.overall_performance_score);
    println!("  Failing Components: {}", results.performance_monitoring.failing_components.len());
    println!();
    
    println!("🗺️ Optimization Roadmap:");
    println!("  Total Recommendations: {}", results.optimization_roadmap.recommendations.len());
    println!("  Estimated Effort: {:.1} hours", results.optimization_roadmap.total_estimated_effort_hours);
    println!("  Expected Impact: {:.1}%", results.optimization_roadmap.overall_expected_impact);
}

fn output_json_results(_results: &PerformanceResults) -> Result<(), Box<dyn std::error::Error>> {
    // TODO: Implement JSON output
    println!("JSON output not yet implemented");
    Ok(())
}

fn output_html_results(_results: &PerformanceResults) -> Result<(), Box<dyn std::error::Error>> {
    // TODO: Implement HTML output
    println!("HTML output not yet implemented");
    Ok(())
}

fn output_markdown_results(_results: &PerformanceResults) -> Result<(), Box<dyn std::error::Error>> {
    // TODO: Implement Markdown output
    println!("Markdown output not yet implemented");
    Ok(())
}

fn output_bundle_text_results(results: &bundle_analysis::BundleAnalysisResults) {
    println!("📦 Bundle Analysis Results");
    println!("Total Size: {:.1} KB", results.total_bundle_size_kb);
    println!("Average Component Size: {:.1} KB", results.average_component_size_kb);
    println!("Largest Component: {:.1} KB", results.largest_component_size_kb);
    println!("Oversized Components: {}", results.oversized_components.len());
    println!("Overall Efficiency: {:.1}%", results.overall_efficiency_score);
}

fn output_bundle_json_results(_results: &bundle_analysis::BundleAnalysisResults) -> Result<(), Box<dyn std::error::Error>> {
    println!("Bundle JSON output not yet implemented");
    Ok(())
}

fn output_bundle_html_results(_results: &bundle_analysis::BundleAnalysisResults) -> Result<(), Box<dyn std::error::Error>> {
    println!("Bundle HTML output not yet implemented");
    Ok(())
}

fn output_bundle_markdown_results(_results: &bundle_analysis::BundleAnalysisResults) -> Result<(), Box<dyn std::error::Error>> {
    println!("Bundle Markdown output not yet implemented");
    Ok(())
}

fn output_monitoring_text_results(results: &performance_monitoring::PerformanceMonitoringResults) {
    println!("📊 Performance Monitoring Results");
    println!("Overall Score: {:.1}%", results.overall_performance_score);
    println!("Failing Components: {}", results.failing_components.len());
    println!("Performance Bottlenecks: {}", results.performance_bottlenecks.len());
}

fn output_monitoring_json_results(_results: &performance_monitoring::PerformanceMonitoringResults) -> Result<(), Box<dyn std::error::Error>> {
    println!("Monitoring JSON output not yet implemented");
    Ok(())
}

fn output_monitoring_html_results(_results: &performance_monitoring::PerformanceMonitoringResults) -> Result<(), Box<dyn std::error::Error>> {
    println!("Monitoring HTML output not yet implemented");
    Ok(())
}

fn output_monitoring_markdown_results(_results: &performance_monitoring::PerformanceMonitoringResults) -> Result<(), Box<dyn std::error::Error>> {
    println!("Monitoring Markdown output not yet implemented");
    Ok(())
}

fn output_benchmark_text_results(results: &benchmarks::BenchmarkSuiteResults) {
    println!("🏃 Benchmark Results");
    println!("Overall Score: {:.1}%", results.overall_score);
    println!("Failing Components: {}", results.failing_components.len());
    println!("Total Benchmarks: {}", results.benchmark_results.len());
}

fn output_benchmark_json_results(_results: &benchmarks::BenchmarkSuiteResults) -> Result<(), Box<dyn std::error::Error>> {
    println!("Benchmark JSON output not yet implemented");
    Ok(())
}

fn output_benchmark_html_results(_results: &benchmarks::BenchmarkSuiteResults) -> Result<(), Box<dyn std::error::Error>> {
    println!("Benchmark HTML output not yet implemented");
    Ok(())
}

fn output_benchmark_markdown_results(_results: &benchmarks::BenchmarkSuiteResults) -> Result<(), Box<dyn std::error::Error>> {
    println!("Benchmark Markdown output not yet implemented");
    Ok(())
}

fn output_roadmap_text_results(roadmap: &optimization_roadmap::OptimizationRoadmap) {
    println!("🗺️ Optimization Roadmap");
    println!("Total Recommendations: {}", roadmap.recommendations.len());
    println!("Estimated Effort: {:.1} hours", roadmap.total_estimated_effort_hours);
    println!("Expected Impact: {:.1}%", roadmap.overall_expected_impact);
    
    let high_priority = roadmap.get_high_priority_recommendations();
    if !high_priority.is_empty() {
        println!("High Priority Items: {}", high_priority.len());
        for rec in high_priority {
            println!("  - {}: {}", rec.title, rec.description);
        }
    }
}

fn output_roadmap_json_results(_roadmap: &optimization_roadmap::OptimizationRoadmap) -> Result<(), Box<dyn std::error::Error>> {
    println!("Roadmap JSON output not yet implemented");
    Ok(())
}

fn output_roadmap_html_results(_roadmap: &optimization_roadmap::OptimizationRoadmap) -> Result<(), Box<dyn std::error::Error>> {
    println!("Roadmap HTML output not yet implemented");
    Ok(())
}

fn output_roadmap_markdown_results(_roadmap: &optimization_roadmap::OptimizationRoadmap) -> Result<(), Box<dyn std::error::Error>> {
    println!("Roadmap Markdown output not yet implemented");
    Ok(())
}
