// examples/test_vpn_setup.rs
//! Quick VPN Setup Test
//!
//! Testet nur die VPN-Verbindung und IP-Überprüfung ohne Scraping-Tasks
//!
//! Usage:
//!   ENABLE_VPN_ROTATION=true VPN_SERVERS=US cargo run --example test_vpn_setup
//!
//! Or with debug logging:
//!   RUST_LOG=debug ENABLE_VPN_ROTATION=true VPN_SERVERS=US cargo run --example test_vpn_setup

use anyhow::Result;
use std::sync::Arc;

// Import von main crate
use event_backtest_engine::config::Config;
use event_backtest_engine::scraper::vpn_integration::VpnIntegration;
use event_backtest_engine::scraper::webdriver::ChromeDriverPool;

#[tokio::main]
async fn main() -> Result<()> {
    // Initialize logging
    tracing_subscriber::fmt()
        .with_max_level(tracing::Level::INFO)
        .with_target(false)
        .init();

    println!("\n═══════════════════════════════════════════════════════════");
    println!("  🔧 VPN Setup Test - Quick Validation");
    println!("═══════════════════════════════════════════════════════════\n");

    // 1. Load config
    println!("1️⃣  Loading configuration...");
    let config = match Config::load() {
        Ok(cfg) => {
            println!("   ✓ Config loaded successfully");
            cfg
        }
        Err(e) => {
            println!("   ❌ Failed to load config: {}", e);
            return Err(e);
        }
    };

    // 2. Display VPN settings
    println!("\n2️⃣  VPN Configuration:");
    println!(
        "   - VPN Rotation: {}",
        if config.enable_vpn_rotation {
            "✅ ENABLED"
        } else {
            "⚠️  DISABLED"
        }
    );

    if config.enable_vpn_rotation {
        let servers = config.get_vpn_servers();
        if servers.is_empty() {
            println!("   - Servers: ❌ NO SERVERS CONFIGURED");
            println!("\n❌ Error: VPN rotation enabled but no servers configured!");
            println!("   Please set VPN_SERVERS in .env (e.g., VPN_SERVERS=US,UK,JP)");
            return Ok(());
        }
        println!("   - Servers: {:?}", servers);
        println!("   - Tasks per Session: {}", config.tasks_per_vpn_session);
        println!("   - Extension ID: {}", config.protonvpn_extension_id);
    } else {
        println!("   ℹ️  VPN rotation is disabled. Test with:");
        println!(
            "       ENABLE_VPN_ROTATION=true VPN_SERVERS=US cargo run --example test_vpn_setup"
        );
        return Ok(());
    }

    // 3. Create VPN Integration
    println!("\n3️⃣  Initializing VPN Integration...");
    let vpn = match VpnIntegration::from_config(&config) {
        Ok(v) => {
            println!("   ✓ VPN Integration created");
            v
        }
        Err(e) => {
            println!("   ❌ Failed to initialize VPN: {}", e);
            return Err(e);
        }
    };

    if !vpn.enabled {
        println!("   ⚠️  VPN is not enabled in config");
        return Ok(());
    }

    // 4. Create ChromeDriver Pool (single instance for testing)
    println!("\n4️⃣  Creating ChromeDriver Pool (1 instance for testing)...");
    let pool: Arc<ChromeDriverPool> = match ChromeDriverPool::new(1).await {
        Ok(p) => {
            println!("   ✓ ChromeDriver pool created");
            Arc::new(p)
        }
        Err(e) => {
            println!("   ❌ Failed to create ChromeDriver pool: {}", e);
            println!("   Make sure chromedriver-win64/chromedriver.exe exists");
            return Err(e);
        }
    };

    println!("   - Instances: {}", pool.get_number_of_instances());

    // 5. Initialize first VPN session
    println!("\n5️⃣  Creating VPN Session...");
    match vpn.initialize_session().await {
        Ok(session_id) => {
            println!("   ✓ VPN session created: {}", session_id);
        }
        Err(e) => {
            println!("   ❌ Failed to create VPN session: {}", e);
            return Err(e);
        }
    }

    // 6. Get current session info
    println!("\n6️⃣  VPN Session Info:");
    if let Some(session) = vpn.get_current_session_id().await {
        println!("   - Session ID: {}", session);
    }

    // 7. Test WebDriver basic navigation
    println!("\n7️⃣  Testing WebDriver Navigation...");
    match test_webdriver_navigation(&pool).await {
        Ok(_) => {
            println!("   ✓ WebDriver navigation successful");
        }
        Err(e) => {
            println!("   ⚠️  WebDriver test had issues: {}", e);
            println!("   This might be normal if extension UI differs");
        }
    }

    // Summary
    println!("\n═══════════════════════════════════════════════════════════");
    println!("  ✅ VPN Setup Test Complete!");
    println!("═══════════════════════════════════════════════════════════");
    println!("\nNext steps:");
    println!("  1. Check if VPN connection is established in Chrome");
    println!("  2. Verify IP address changed (should be from VPN server)");
    println!("  3. If all looks good, you can run the full scraper:");
    println!("     cargo run");

    Ok(())
}

/// Test basic WebDriver navigation to extension
async fn test_webdriver_navigation(pool: &Arc<ChromeDriverPool>) -> Result<()> {
    println!("   Navigating to IP check site...");

    // Simple test: navigate to whatismyipaddress.com
    match pool
        .execute("https://whatismyipaddress.com/".to_string(), |client| {
            async move {
                let source = client.source().await?;

                // Try to extract IP
                if let Some(start) = source.find("IPv4") {
                    let section = &source[start..];
                    if let Some(ip_start) = section.find(|c: char| c.is_numeric()) {
                        if let Some(ip_end) =
                            section[ip_start..].find(|c: char| !c.is_numeric() && c != '.')
                        {
                            let ip = &section[ip_start..ip_start + ip_end];
                            println!("   - Detected IP: {}", ip);
                            return Ok(ip.to_string());
                        }
                    }
                }

                Ok("IP extraction attempted".to_string())
            }
        })
        .await
    {
        Ok(result) => {
            println!("   Result: {}", result);
            Ok(())
        }
        Err(e) => Err(e),
    }
}