// src/main.rs

use web_scraper::{*, scraper, economic, corporate};

use anyhow::Result;
use web_scraper::config::Config;
use scraper::docker_vpn_proxy::{DockerVpnProxyPool, cleanup_all_proxy_containers};
use scraper::webdriver::ChromeDriverPool;
use util::directories::DataPaths;
use util::{logger, opnv};
use std::sync::Arc;
use std::sync::atomic::{AtomicBool, Ordering};
use std::process::Command;

#[tokio::main]
async fn main() -> Result<()> {
    let output = if cfg!(target_os = "windows") {
        Command::new("cmd")
            .args(["/C", "docker desktop start"])
            .output()
            .expect("failed to execute process")
    } else {
        Command::new("sh")
            .arg("-c")
            .arg("echo hello")
            .output()
            .expect("failed to execute process")
    };
    let _start_docker_desktop = output.stdout;
    
    cleanup_all_proxy_containers().await.ok();

    let config = match Config::load() {
        Ok(cfg) => cfg,
        Err(_) => {
            eprintln!("Using default configuration");
            Config::default()
        }
    };

    let paths = DataPaths::new(".")?;

    // Initialize monitoring system
    let config_snapshot = ConfigSnapshot {
        max_parallel_instances: config.max_parallel_instances,
        max_tasks_per_instance: config.max_tasks_per_instance,
        enable_vpn_rotation: config.enable_vpn_rotation,
        max_requests_per_session: config.max_requests_per_session,
        min_request_interval_ms: config.min_request_interval_ms,
        max_retry_attempts: config.max_retry_attempts,
    };

    let (monitoring_handle, _monitoring_task) = init_monitoring(
        config_snapshot,
        paths.logs_dir().to_path_buf(),
        3030, // Dashboard port
    ).await?;

    // Emit pool initialization event
    monitoring_handle.emit(monitoring::MonitoringEvent::PoolInitialized {
        pool_size: config.max_parallel_instances,
        with_proxy: config.enable_vpn_rotation,
        with_rotation: config.max_tasks_per_instance > 0,
    });

    logger::log_info("Monitoring dashboard available at http://localhost:3030").await;

    logger::init_debug_logger(paths.logs_dir()).await.ok();
    logger::log_info("=== Economic Webscraper Started ===").await;
    logger::log_info(&format!(
        "Config → parallel_instances: {}, task_limit: {} vpn_rotation: {} proxy_instances_per_certificate: {:?}",
        config.max_parallel_instances,
        config.max_tasks_per_instance,
        config.enable_vpn_rotation,
        config.proxy_instances_per_certificate
    )).await;

    let number_proxy_instances_per_certificate = config.proxy_instances_per_certificate.unwrap_or(1);


    // Simple shutdown flag
    let shutdown_flag = Arc::new(AtomicBool::new(false));

    // === Step 1: Fetch VPNBook configs ===
    let proxy_pool: Option<Arc<DockerVpnProxyPool>> = if config.enable_vpn_rotation {
        logger::log_info("VPN Rotation Enabled – Fetching latest VPNBook configs").await;
        let temp_pool = Arc::new(ChromeDriverPool::new_with_proxy_and_task_limit(None, &config, Some(monitoring_handle.clone())).await?);

        let (username, password, _files) = opnv::fetch_vpnbook_configs(&temp_pool, paths.cache_dir()).await?;
        logger::log_info(&format!("VPNBook credentials → User: {}", username)).await;

        let server_count = std::fs::read_dir(paths.cache_openvpn_dir())?
            .filter(|e| e.as_ref().unwrap().path().is_dir())
            .count();

        if server_count == 0 {
            logger::log_warn("No VPN servers found – continuing without VPN").await;
            None
        } else {
            logger::log_info(&format!("Found {} VPN servers – starting Docker proxy containers", server_count)).await;
            let pp = Arc::new(DockerVpnProxyPool::new(paths.cache_openvpn_dir(), username, password, number_proxy_instances_per_certificate).await?);

            logger::log_info(&format!("All {} Docker proxy containers started and ready", pp.num_proxies())).await;
            for i in 0..pp.num_proxies() {
                if let Some(proxy_info) = pp.get_proxy_info(i) {
                    monitoring_handle.emit(monitoring::MonitoringEvent::ProxyConnected {
                        container_name: proxy_info.container_name.clone(),
                        ip_address: proxy_info.ip_address.clone(),
                        port: proxy_info.port,
                    });
                }
            }

            Some(pp)
        }
    } else {
        logger::log_info("VPN rotation disabled – using direct connection").await;
        None
    };

    // === Step 2: Initialize ChromeDriver pool ===
    let pool_size_limit = config.max_parallel_instances;
    let task_limit = config.max_tasks_per_instance;

    logger::log_info(&format!("Creating ChromeDriver pool with {} instances...", pool_size_limit)).await;
    
    let pool = Arc::new(
        if task_limit > 0 {
            ChromeDriverPool::new_with_proxy_and_task_limit(proxy_pool.clone(), &config, Some(monitoring_handle.clone())).await?
        } else {
            ChromeDriverPool::new_with_proxy_and_task_limit(proxy_pool.clone(), &config, Some(monitoring_handle.clone())).await?
        }
    );

    logger::log_info(&format!("ChromeDriver pool ready with {} instances", pool_size_limit)).await;

    // === Step 3: Ctrl+C handler ===
    {
        let shutdown_flag_clone = Arc::clone(&shutdown_flag);
        let pool_clone = Arc::clone(&pool);
        let proxy_clone = proxy_pool.clone();

        tokio::spawn(async move {
            tokio::signal::ctrl_c().await.ok();
            logger::log_info("Ctrl+C received – shutting down gracefully...").await;
            
            // Set flag first
            shutdown_flag_clone.store(true, Ordering::SeqCst);
            
            // Wait a bit for tasks to notice
            tokio::time::sleep(tokio::time::Duration::from_secs(2)).await;

            // Cleanup
            if let Err(e) = (&*pool_clone).shutdown().await {
                logger::log_error(&format!("Error during pool shutdown: {}", e)).await;
            }

            if let Some(pp) = proxy_clone {
                if let Err(e) = pp.shutdown().await {
                    logger::log_warn(&format!("Failed to stop Docker containers: {}", e)).await;
                } else {
                    logger::log_info("All Docker VPN containers stopped").await;
                }
            }

            let _ = cleanup_all_proxy_containers().await;
            std::process::exit(0);
        });
    }
    
    // === Step 4: Run scraping jobs ===
    logger::log_info("--- Starting ECONOMIC data update ---").await;
    //economic::run_full_update(&config, &pool).await?;
    logger::log_info("Economic update completed").await;

    if !shutdown_flag.load(Ordering::SeqCst) {
        logger::log_info("--- Starting CORPORATE data update ---").await;
        corporate::run_full_update(&config, &pool, &shutdown_flag).await?;
        logger::log_info("Corporate update completed").await;
    }

    // === Step 5: Final cleanup ===
    if !shutdown_flag.load(Ordering::SeqCst) {
        logger::log_info("Shutting down ChromeDriver pool...").await;
        pool.shutdown().await?;

        if let Some(pp) = proxy_pool {
            logger::log_info("Stopping Docker VPN proxy containers...").await;
            pp.shutdown().await?;
            cleanup_all_proxy_containers().await.ok();
        }

        logger::log_info("=== Application finished successfully ===").await;
    }
    
    Ok(())
}