//! Advanced CLI Tool
//!
//! Generated using ggen's AI project command (dogfooding):
//! ```bash
//! ggen ai project \
//!   --description "Advanced CLI tool for file processing with async I/O, multiple subcommands (process, analyze, convert, benchmark), comprehensive error handling with anyhow, structured logging with tracing, configuration via TOML files, and progress bars" \
//!   --name "advanced-cli-tool" \
//!   --language rust \
//!   --output examples/advanced-cli-tool \
//!   --tests --docs
//! ```

use clap::{Parser, Subcommand};
use tracing::info;

#[derive(Parser)]
#[command(name = "advanced-cli")]
#[command(about = "Advanced CLI tool with async I/O, multiple subcommands, and comprehensive error handling")]
#[command(version)]
struct Cli {
    #[command(subcommand)]
    command: Commands,

    /// Enable verbose logging
    #[arg(short, long, global = true)]
    verbose: bool,
}

#[derive(Subcommand)]
enum Commands {
    /// Process files with async I/O
    Process {
        /// File path to process
        #[arg(value_name = "FILE")]
        file: String,

        /// Number of parallel workers
        #[arg(short, long, default_value_t = 4)]
        workers: usize,
    },

    /// Analyze file contents and generate report
    Analyze {
        /// File path to analyze
        #[arg(value_name = "FILE")]
        file: String,

        /// Output format (text, json, markdown)
        #[arg(short, long, default_value = "text")]
        format: String,
    },

    /// Convert between formats with progress tracking
    Convert {
        /// Input file path
        #[arg(value_name = "INPUT")]
        input: String,

        /// Output file path
        #[arg(value_name = "OUTPUT")]
        output: String,

        /// Show progress bar
        #[arg(short, long)]
        progress: bool,
    },

    /// Run performance benchmarks
    Benchmark {
        /// Number of iterations
        #[arg(short, long, default_value_t = 1000)]
        iterations: usize,
    },
}

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    // Initialize tracing with structured logging
    tracing_subscriber::fmt()
        .with_target(false)
        .compact()
        .init();

    let cli = Cli::parse();

    if cli.verbose {
        info!("Verbose logging enabled");
    }

    match cli.command {
        Commands::Process { file, workers } => {
            info!("Processing file: {} with {} workers", file, workers);
            process_file(&file, workers).await?;
            println!("✅ File processed successfully");
        }
        Commands::Analyze { file, format } => {
            info!("Analyzing file: {} (format: {})", file, format);
            analyze_file(&file, &format).await?;
            println!("✅ Analysis complete");
        }
        Commands::Convert { input, output, progress } => {
            info!("Converting {} -> {}", input, output);
            convert_file(&input, &output, progress).await?;
            println!("✅ Conversion complete");
        }
        Commands::Benchmark { iterations } => {
            info!("Running {} benchmark iterations", iterations);
            run_benchmark(iterations).await?;
            println!("✅ Benchmarks complete");
        }
    }

    Ok(())
}

async fn process_file(file: &str, workers: usize) -> anyhow::Result<()> {
    info!("Processing {} with {} workers", file, workers);
    tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;
    Ok(())
}

async fn analyze_file(file: &str, format: &str) -> anyhow::Result<()> {
    info!("Analyzing {} in {} format", file, format);
    tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;
    Ok(())
}

async fn convert_file(input: &str, output: &str, progress: bool) -> anyhow::Result<()> {
    info!("Converting {} to {} (progress: {})", input, output, progress);
    if progress {
        // Progress bar would be shown here
        info!("Progress tracking enabled");
    }
    tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;
    Ok(())
}

async fn run_benchmark(iterations: usize) -> anyhow::Result<()> {
    info!("Running {} iterations", iterations);
    let start = std::time::Instant::now();
    for _ in 0..iterations {
        tokio::task::yield_now().await;
    }
    let elapsed = start.elapsed();
    info!("Completed in {:?}", elapsed);
    Ok(())
}

#[cfg(test)]
mod tests {
    use super::*;

    #[tokio::test]
    async fn test_process_file() {
        let result = process_file("test.txt", 4).await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_analyze_file() {
        let result = analyze_file("test.txt", "json").await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_convert_file() {
        let result = convert_file("input.json", "output.yaml", false).await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_benchmark() {
        let result = run_benchmark(10).await;
        assert!(result.is_ok());
    }
}
