/// Activity Tracker MVP - Main Entry Point
/// Backend de suivi d'activité pour reconstruire l'historique de travail

use activity_tracker::*;
use clap::{Parser, Subcommand};
use std::path::PathBuf;
use std::time::Duration;
use log::{info, error};

#[derive(Parser)]
#[command(name = "activity-tracker")]
#[command(about = "Activity Tracker MVP - Track and analyze your work activities", long_about = None)]
struct Cli {
    #[command(subcommand)]
    command: Commands,

    /// Configuration file path
    #[arg(short, long, value_name = "FILE")]
    config: Option<PathBuf>,

    /// Enable debug logging
    #[arg(short, long)]
    debug: bool,
}

#[derive(Subcommand)]
enum Commands {
    /// Start capturing activity in the background
    Start {
        /// Database password for encryption
        #[arg(short, long)]
        password: String,

        /// Capture interval in seconds (default: 300 = 5 minutes)
        #[arg(short, long, default_value = "300")]
        interval: u64,
    },

    /// Generate and export a daily report
    Report {
        /// Database password for decryption
        #[arg(short, long)]
        password: String,

        /// Output file path (JSON)
        #[arg(short, long, default_value = "report.json")]
        output: PathBuf,

        /// Report for last N days (default: today only)
        #[arg(short, long)]
        days: Option<u32>,
    },

    /// Show storage statistics
    Stats {
        /// Database password
        #[arg(short, long)]
        password: String,
    },

    /// Cleanup old data
    Cleanup {
        /// Database password
        #[arg(short, long)]
        password: String,

        /// Keep data for N days (default: 30)
        #[arg(short, long, default_value = "30")]
        days: i64,
    },

    /// Export all data
    Export {
        /// Database password
        #[arg(short, long)]
        password: String,

        /// Output file path
        #[arg(short, long)]
        output: PathBuf,
    },
}

#[tokio::main]
async fn main() -> Result<()> {
    let cli = Cli::parse();

    // Initialize logger
    let log_level = if cli.debug { "debug" } else { "info" };
    env_logger::Builder::from_env(env_logger::Env::default().default_filter_or(log_level))
        .init();

    info!("Activity Tracker MVP v{}", VERSION);

    // Load configuration
    let config = if let Some(config_path) = cli.config {
        config::Config::load(config_path)?
    } else {
        config::Config::default_config()
    };

    match cli.command {
        Commands::Start { password, interval } => {
            start_capture(&config, &password, interval).await?;
        }
        Commands::Report { password, output, days } => {
            generate_report(&config, &password, output, days)?;
        }
        Commands::Stats { password } => {
            show_stats(&config, &password)?;
        }
        Commands::Cleanup { password, days } => {
            cleanup_data(&config, &password, days)?;
        }
        Commands::Export { password, output } => {
            export_data(&config, &password, output)?;
        }
    }

    Ok(())
}

/// Start capture loop
async fn start_capture(
    config: &config::Config,
    password: &str,
    interval_seconds: u64,
) -> Result<()> {
    info!("Starting activity capture (interval: {}s)", interval_seconds);

    // Initialize components
    let mut capturer = capture::Capturer::new(config.capture.screenshot_quality);
    let mut db = storage::Database::new(&config.storage.db_path, password)?;
    let classifier = analysis::Classifier::new();

    let interval = Duration::from_secs(interval_seconds);

    info!("Capture started. Press Ctrl+C to stop.");

    loop {
        // Capture activity
        match capturer.capture() {
            Ok(capture_data) => {
                info!(
                    "Captured: {} (active: {})",
                    capture_data.window_metadata.title, capture_data.is_active
                );

                // Store in database
                match db.store_capture(&capture_data) {
                    Ok(capture_id) => {
                        info!("Stored capture with ID: {}", capture_id);

                        // Classify activity
                        let classification = classifier.classify(&capture_data.window_metadata);
                        info!(
                            "Classified as: {} (confidence: {:.2})",
                            classification.category.as_str(),
                            classification.confidence
                        );

                        // Store analysis
                        let _ = db.store_analysis(
                            &capture_data.id,
                            classification.category.as_str(),
                            classification.confidence,
                            Some(&classification.entities.to_json()),
                        );
                    }
                    Err(e) => {
                        error!("Failed to store capture: {}", e);
                    }
                }

                capturer.reset_activity();
            }
            Err(e) => {
                error!("Capture failed: {}", e);
            }
        }

        // Wait for next interval
        tokio::time::sleep(interval).await;
    }
}

/// Generate and export report
fn generate_report(
    config: &config::Config,
    password: &str,
    output: PathBuf,
    days: Option<u32>,
) -> Result<()> {
    info!("Generating report...");

    let db = storage::Database::new(&config.storage.db_path, password)?;
    let generator = report::ReportGenerator::new("default_user".to_string());

    let report = if let Some(days_count) = days {
        let period = report::Period::custom(
            chrono::Utc::now() - chrono::Duration::days(days_count as i64),
            chrono::Utc::now(),
        );
        generator.generate(&db, period)?
    } else {
        generator.generate_today(&db)?
    };

    info!(
        "Report generated: {} activities, total time: {}",
        report.stats.activity_count, report.stats.total_time_formatted
    );

    // Export to JSON
    report::JsonExporter::export(&report, &output)?;
    info!("Report exported to: {:?}", output);

    // Print summary
    println!("\n=== Activity Report Summary ===");
    println!("Total time: {}", report.stats.total_time_formatted);
    println!("Activities: {}", report.stats.activity_count);
    println!("\nBy Category:");
    for (category, stats) in &report.stats.by_category {
        println!(
            "  {}: {} ({:.1}%)",
            category, stats.time_formatted, stats.percentage
        );
    }

    if let Some(hour) = report.stats.most_productive_hour {
        println!("\nMost productive hour: {}:00", hour);
    }

    Ok(())
}

/// Show storage statistics
fn show_stats(config: &config::Config, password: &str) -> Result<()> {
    let db = storage::Database::new(&config.storage.db_path, password)?;
    let stats = db.get_stats()?;

    println!("\n=== Storage Statistics ===");
    println!("Total captures: {}", stats.total_captures);
    println!("Total size: {:.2} MB", stats.total_size_mb);

    if let Some(oldest) = stats.oldest_capture {
        println!("Oldest capture: {}", oldest.format("%Y-%m-%d %H:%M:%S"));
    }

    if let Some(newest) = stats.newest_capture {
        println!("Newest capture: {}", newest.format("%Y-%m-%d %H:%M:%S"));
    }

    println!("\nCaptures by category:");
    for (category, count) in stats.captures_by_category {
        println!("  {}: {}", category, count);
    }

    Ok(())
}

/// Cleanup old data
fn cleanup_data(config: &config::Config, password: &str, retention_days: i64) -> Result<()> {
    info!("Cleaning up data older than {} days...", retention_days);

    let mut db = storage::Database::new(&config.storage.db_path, password)?;
    let deleted = db.cleanup_old_data(retention_days)?;

    info!("Cleanup completed");
    println!("Data older than {} days has been removed", retention_days);

    Ok(())
}

/// Export all data
fn export_data(config: &config::Config, password: &str, output: PathBuf) -> Result<()> {
    info!("Exporting all data...");

    let db = storage::Database::new(&config.storage.db_path, password)?;
    let generator = report::ReportGenerator::new("default_user".to_string());

    // Export everything (last 365 days)
    let period = report::Period::custom(
        chrono::Utc::now() - chrono::Duration::days(365),
        chrono::Utc::now(),
    );

    let report = generator.generate(&db, period)?;
    report::JsonExporter::export(&report, &output)?;

    info!("Data exported to: {:?}", output);
    println!("All data exported to: {:?}", output);

    Ok(())
}