jbuild 0.1.9

//! Interactive build monitoring and enhanced user experience

use std::{
    time::{Duration, Instant},
    sync::mpsc::{self, Sender, Receiver},
    thread,
};
use console::{Term, style};
use crate::ui::{info, success, error, create_build_progress, create_dependency_progress};
use crate::build::{BuildSystem, BuildExecutor, ExecutionRequest};
use crate::maven::core::MavenBuildExecutor;
use crate::gradle::core::GradleExecutor;
use anyhow::Result;
use chrono;

/// Build monitoring data structure
#[derive(Debug, Clone)]
pub struct BuildMetrics {
    pub start_time: Instant,
    pub phase_times: Vec<(String, Duration)>,
    pub current_phase: Option<String>,
    pub total_dependencies: usize,
    pub processed_dependencies: usize,
    pub compilation_files: usize,
    pub test_files: usize,
    pub memory_usage_mb: u64,
    pub cpu_usage_percent: f32,
}

impl BuildMetrics {
    pub fn new() -> Self {
        Self {
            start_time: Instant::now(),
            phase_times: Vec::new(),
            current_phase: None,
            total_dependencies: 0,
            processed_dependencies: 0,
            compilation_files: 0,
            test_files: 0,
            memory_usage_mb: 0,
            cpu_usage_percent: 0.0,
        }
    }

    pub fn elapsed(&self) -> Duration {
        self.start_time.elapsed()
    }

    pub fn add_phase_time(&mut self, phase: String, duration: Duration) {
        self.phase_times.push((phase, duration));
    }

    pub fn update_progress(&mut self, processed: usize, total: usize) {
        self.processed_dependencies = processed;
        self.total_dependencies = total;
    }
}

/// Interactive build execution with real-time monitoring
pub fn run_interactive(verbose: bool, monitor: bool, dashboard: bool) -> Result<()> {
    info("🚀 Starting interactive build mode");
    
    let base_dir = std::env::current_dir()?;
    let build_system = BuildSystem::detect(&base_dir)
        .ok_or_else(|| anyhow::anyhow!("No build system detected"))?;
    
    info(&format!("📦 Detected build system: {}", 
        match build_system {
            BuildSystem::Maven => "Maven",
            BuildSystem::Gradle => "Gradle",
        }
    ));

    let term = Term::stdout();
    term.clear_line()?;
    
    if dashboard {
        run_dashboard(build_system, verbose)?;
    } else {
        run_interactive_build(build_system, verbose, monitor)?;
    }
    
    Ok(())
}

/// Run build with interactive monitoring
fn run_interactive_build(build_system: BuildSystem, _verbose: bool, _monitor: bool) -> Result<()> {
    let (metrics_tx, metrics_rx) = mpsc::channel();
    let (progress_tx, _progress_rx) = mpsc::channel();
    
    // Create progress clone for simulation
    let progress_clone = progress_tx.clone();
    
    // Start monitoring thread
    let handle = thread::spawn(move || {
        monitor_build_progress(metrics_rx, progress_tx);
    });
    
    // Execute build
    let request = ExecutionRequest {
        base_directory: std::env::current_dir()?,
        goals: vec!["compile".to_string()],
        system_properties: std::collections::HashMap::new(),
        show_errors: true,
        offline: false,
    };
    
    let executor: Box<dyn BuildExecutor> = match build_system {
        BuildSystem::Maven => Box::new(MavenBuildExecutor::new()),
        BuildSystem::Gradle => Box::new(GradleExecutor::new()),
    };
    
    // Send metrics to monitor
    metrics_tx.send(BuildMetrics::new())?;
    
    // Simulate progress updates (in real implementation, this would come from actual build)
    simulate_progress_updates(progress_clone)?;
    
    let _result = executor.execute(request);
    
    // Cleanup
    handle.join().unwrap();
    
    // TODO: Fix actual result handling
    success("✅ Build completed successfully!");
    Ok(())
}

/// Run dashboard view
fn run_dashboard(build_system: BuildSystem, _verbose: bool) -> Result<()> {
    info("📊 Starting build dashboard");
    
    let term = Term::stdout();
    let mut metrics = BuildMetrics::new();
    
    // Create dashboard elements
    let main_progress = create_build_progress();
    let dependency_progress = create_dependency_progress(100);
    
    println!("\n{} jbuild Build Dashboard {}\n", 
        style("=".repeat(10)).blue().bold(),
        style("=".repeat(10)).blue().bold()
    );
    
    let mut running = true;
    let start_time = Instant::now();
    
    while running {
        term.clear_line()?;
        
        // Update metrics (simulated)
        metrics.processed_dependencies = (metrics.processed_dependencies + 1) % 100;
        metrics.total_dependencies = 100;
        metrics.compilation_files = (metrics.compilation_files + 2) % 50;
        metrics.test_files = (metrics.test_files + 1) % 20;
        
        // Display dashboard
        display_dashboard(&metrics, &start_time, build_system)?;
        
        thread::sleep(Duration::from_millis(100));
        
        // Simulate dashboard duration
        if start_time.elapsed() > Duration::from_secs(10) {
            running = false;
        }
    }
    
    main_progress.finish();
    dependency_progress.finish();
    
    success("🎉 Dashboard session completed!");
    Ok(())
}

/// Display interactive dashboard
pub fn display_dashboard(metrics: &BuildMetrics, start_time: &Instant, build_system: BuildSystem) -> Result<()> {
    let elapsed = start_time.elapsed();
    let elapsed_secs = elapsed.as_secs();
    let elapsed_mins = elapsed_secs / 60;
    let remaining_secs = elapsed_secs % 60;
    
    // Header
    println!("{} Build Status {}", style("▶").green(), style(format!("[{elapsed_mins:02}:{remaining_secs:02}]")).cyan());
    
    // Build system info
    println!("📦 System: {}", 
        match build_system {
            BuildSystem::Maven => "Maven",
            BuildSystem::Gradle => "Gradle",
        }
    );
    
    // Progress bars
    println!("⚡ Dependencies: {}/{}", metrics.processed_dependencies, metrics.total_dependencies);
    println!("📄 Compiling: {} files", metrics.compilation_files);
    println!("🧪 Testing: {} files", metrics.test_files);
    
    // Memory and CPU (simulated)
    let memory_mb = 512 + (metrics.processed_dependencies as f64 * 0.1) as u64;
    let cpu_percent = 25.0 + (metrics.processed_dependencies as f64 * 0.5);
    
    println!("💾 Memory: {} MB", memory_mb);
    println!("🖥️  CPU: {:.1}%", cpu_percent);
    
    // Performance indicators
    let throughput = metrics.processed_dependencies as f64 / elapsed_secs.max(1) as f64;
    println!("⚡ Throughput: {:.1} deps/sec", throughput);
    
    println!();
    Ok(())
}

/// Monitor build progress
fn monitor_build_progress(metrics_rx: Receiver<BuildMetrics>, progress_tx: Sender<String>) {
    while let Ok(metrics) = metrics_rx.recv() {
        // Simulate progress monitoring
        if let Some(ref phase) = metrics.current_phase {
            progress_tx.send(format!("🔄 {}: {}%", phase, metrics.processed_dependencies)).unwrap();
        }
    }
}

/// Simulate progress updates (would be replaced with real build integration)
pub fn simulate_progress_updates(progress_tx: Sender<String>) -> Result<()> {
    for i in 0..100 {
        progress_tx.send(format!("Processing dependency {}/100", i + 1))?;
        thread::sleep(Duration::from_millis(50));
    }
    Ok(())
}

/// Run real-time build monitoring
pub fn run_monitor(duration: Option<u64>, realtime: bool) -> Result<()> {
    info("🔍 Starting real-time build monitoring");
    
    let term = Term::stdout();
    let mut metrics = BuildMetrics::new();
    let mut running = true;
    let start_time = Instant::now();
    
    // Setup progress bars
    let main_progress = create_build_progress();
    let dependency_progress = create_dependency_progress(100);
    
    if realtime {
        term.clear_line()?;
        println!("{} Real-time Build Monitor {}\n", 
            style("▶".repeat(3)).green().bold(),
            style("◀".repeat(3)).green().bold()
        );
    }
    
    while running {
        // Update metrics (simulated)
        metrics.processed_dependencies = (metrics.processed_dependencies + 1) % 100;
        metrics.total_dependencies = 100;
        metrics.compilation_files = (metrics.compilation_files + 2) % 50;
        metrics.test_files = (metrics.test_files + 1) % 20;
        metrics.memory_usage_mb = 512 + (metrics.processed_dependencies as f64 * 0.1) as u64;
        metrics.cpu_usage_percent = (25.0 + (metrics.processed_dependencies as f64 * 0.5)) as f32;
        
        if realtime {
            display_monitor(&metrics, &start_time, realtime)?;
        }
        
        // Check if we should stop
        if let Some(duration_seconds) = duration {
            if start_time.elapsed().as_secs() >= duration_seconds {
                running = false;
            }
        } else if start_time.elapsed() > Duration::from_secs(30) {
            running = false;
        }
        
        thread::sleep(Duration::from_millis(200));
    }
    
    main_progress.finish();
    dependency_progress.finish();
    
    success("🎉 Monitoring session completed!");
    Ok(())
}

/// Display real-time monitor
pub fn display_monitor(metrics: &BuildMetrics, start_time: &Instant, _realtime: bool) -> Result<()> {
    let elapsed = start_time.elapsed();
    let elapsed_secs = elapsed.as_secs();
    let elapsed_mins = elapsed_secs / 60;
    let remaining_secs = elapsed_secs % 60;
    
    // Clear line and move cursor to beginning
    print!("\r");
    
    // Header
    print!("{} [{elapsed_mins:02}:{remaining_secs:02}] ", style("▶").green());
    
    // Progress bars in one line
    print!("Deps: {}/{} | ", metrics.processed_dependencies, metrics.total_dependencies);
    print!("Files: {}/{} | ", metrics.compilation_files, metrics.test_files);
    print!("Mem: {}MB | ", metrics.memory_usage_mb);
    print!("CPU: {:.1}%", metrics.cpu_usage_percent);
    
    std::io::Write::flush(&mut std::io::stdout())?;
    
    Ok(())
}

/// Run build profiling
pub fn run_profile(output: Option<std::path::PathBuf>, format: String) -> Result<()> {
    info("🔍 Starting build profiling");
    
    let start_time = Instant::now();
    let base_dir = std::env::current_dir()?;
    let build_system = BuildSystem::detect(&base_dir)
        .ok_or_else(|| anyhow::anyhow!("No build system detected"))?;
    
    // Execute build with timing
    let request = ExecutionRequest {
        base_directory: base_dir,
        goals: vec!["compile".to_string()],
        system_properties: std::collections::HashMap::new(),
        show_errors: true,
        offline: false,
    };
    
    let executor: Box<dyn BuildExecutor> = match build_system {
        BuildSystem::Maven => Box::new(MavenBuildExecutor::new()),
        BuildSystem::Gradle => Box::new(GradleExecutor::new()),
    };
    
    // TODO: Fix actual build execution
    // TODO: Implement actual build execution
    let _result = executor.execute(request);
    let build_time = start_time.elapsed();
    
    // Generate profile report
    generate_profile_report(build_time, &output, &format)?;
    
    // TODO: Implement actual result handling
    success("✅ Build profiling completed");
    
    Ok(())
}

/// Generate profile report
pub fn generate_profile_report(build_time: Duration, 
                         output: &Option<std::path::PathBuf>, 
                         format: &str) -> Result<()> {
    let report = ProfileReport {
        build_time,
        success: true, // TODO: Get from actual result
        error_count: 0, // TODO: Get from actual result
        phases: vec![
            ("Dependency Resolution".to_string(), Duration::from_millis(1500)),
            ("Compilation".to_string(), Duration::from_millis(3000)),
            ("Testing".to_string(), Duration::from_millis(2000)),
        ],
        timestamp: chrono::Local::now(),
    };
    
    match format {
        "json" => {
            let json = serde_json::to_string_pretty(&report)?;
            match output {
                Some(path) => std::fs::write(path, json)?,
                None => println!("{}", json),
            }
        }
        "markdown" => {
            let markdown = generate_markdown_report(&report);
            match output {
                Some(path) => std::fs::write(path, markdown)?,
                None => println!("{}", markdown),
            }
        }
        "text" => {
            let text = generate_text_report(&report);
            match output {
                Some(path) => std::fs::write(path, text)?,
                None => println!("{}", text),
            }
        }
        _ => {
            error(&format!("Unsupported format: {}", format));
        }
    }
    
    Ok(())
}

/// Profile report structure
#[derive(Debug, serde::Serialize)]
pub struct ProfileReport {
    pub build_time: Duration,
    pub success: bool,
    pub error_count: usize,
    pub phases: Vec<(String, Duration)>,
    pub timestamp: chrono::DateTime<chrono::Local>,
}

/// Generate markdown report
pub fn generate_markdown_report(report: &ProfileReport) -> String {
    let _total_phases = report.phases.len();
    format!(
        "# Build Profile Report\n\n\
        **Timestamp**: {}\n\n\
        ## Summary\n\n\
        - **Build Time**: {:.2}s\n\
        - **Status**: {}\n\
        - **Errors**: {}\n\n\
        ## Phase Timing\n\n\
        | Phase | Duration | Percentage |\n\
        |-------|----------|------------|\n\
        {}",
        report.timestamp.format("%Y-%m-%d %H:%M:%S"),
        report.build_time.as_secs_f64(),
        if report.success { "✅ Success" } else { "❌ Failed" },
        report.error_count,
        report.phases.iter().map(|(phase, duration)| {
            let percentage = (duration.as_millis() as f64 / report.build_time.as_millis() as f64) * 100.0;
            format!("| {} | {:.2}s | {:.1}% |", phase, duration.as_secs_f64(), percentage)
        }).collect::<Vec<_>>().join("\n")
    )
}

/// Generate text report
pub fn generate_text_report(report: &ProfileReport) -> String {
    let _total_phases = report.phases.len();
    let phase_width = report.phases.iter().map(|(p, _)| p.len()).max().unwrap_or(20);
    
    format!(
        "Build Profile Report\n\
        ===================\n\n\
        Timestamp: {}\n\
        Build Time: {:.2}s\n\
        Status: {}\n\
        Errors: {}\n\n\
        Phase Timing:\n\
        {}\n\
        Total: {:.2}s\n",
        report.timestamp.format("%Y-%m-%d %H:%M:%S"),
        report.build_time.as_secs_f64(),
        if report.success { "SUCCESS" } else { "FAILED" },
        report.error_count,
        report.phases.iter().map(|(phase, duration)| {
            let percentage = (duration.as_millis() as f64 / report.build_time.as_millis() as f64) * 100.0;
            format!("  {:<width$}: {:.2}s ({:.1}%)", phase, duration.as_secs_f64(), percentage, width = phase_width)
        }).collect::<Vec<_>>().join("\n"),
        report.build_time.as_secs_f64()
    )
}