// This script demonstrates how to rebuild a server with a new image using install_image.
// The install_image function is the Hetzner Cloud equivalent of the traditional installimage command.

// Initialize the Hetzner client with your API token.
let client = new_hetzner_client(get_env("HETZNER_API_TOKEN"));

// Replace this with the ID of the server you want to rebuild.
// WARNING: This will DESTROY ALL DATA on the target server!
let server_id = 1234567; // FIXME: Replace with a real server ID

// The install_image function rebuilds a server by overwriting its disk with a new image.
// This is equivalent to the traditional installimage command used on dedicated servers.
//
// Available image types:
// - system: Official OS images (e.g., "ubuntu-22.04", "debian-12")
// - backup: Automatic backups of your servers
// - snapshot: Manual snapshots you've created
// - app: Application images (if available)
//
// The function accepts either an image name or image ID:
// client.install_image(server_id, "ubuntu-22.04");  // By name
// client.install_image(server_id, "15512617");      // By ID

// Get current server information before rebuilding.
print("Getting current server information...");
let server = client.get_server(server_id);
print(`Server: ${server.name} (ID: ${server.id})`);
print(`Current Status: ${server.status}`);
print(`Current Image: ${server.image.name}`);
print("");

// List available system images to choose from.
print("Available system images (first 5):");
let system_images_params = new_list_images_params_builder()
    .with_type("system")
    .with_status("available");
let system_images = client.list_images(system_images_params);

for i in 0..5 {
    if i < system_images.len() {
        let img = system_images[i];
        print(`  ${img.id}: ${img.name} (${img.type})`);
    }
}
print("");

// List backup images for this server (if any).
print("Backup images for this server:");
let backup_images_params = new_list_images_params_builder()
    .with_type("backup")
    .with_bound_to(server_id.to_string());
let backup_images = client.list_images(backup_images_params);

if backup_images.len() > 0 {
    for i in 0..backup_images.len() {
        let img = backup_images[i];
        print(`  ${img.id}: ${img.name} (${img.type})`);
    }
} else {
    print("  No backup images found for this server");
}
print("");

// --- Rebuild Server with System Image ---
// WARNING: This will DESTROY ALL DATA on the server!
// The server will be automatically powered off before the rebuild.

// Example 1: Rebuild with Ubuntu 22.04 (by name)
// WARNING: Uncomment the following lines to perform the actual rebuild
// print("Initiating server rebuild with Ubuntu 22.04...");
// client.install_image(server_id, "ubuntu-22.04");
// print("✅ Server rebuild request sent successfully!");
print("⚠️  install_image call is commented out for safety. Uncomment to execute.");
print("");

// Example 2: Rebuild with specific image ID
// client.install_image(server_id, "15512617"); // Replace with actual image ID
// print("Server rebuild initiated with image ID 15512617");

// --- Restore from Backup ---
// If backup images are available, you can restore from them:
if backup_images.len() > 0 {
    let backup_img = backup_images[0];
    // client.install_image(server_id, backup_img.id.to_string());
    // print(`Server restore initiated from backup: ${backup_img.name}`);
    // print(`Backup available: ${backup_img.name} (ID: ${backup_img.id})`);
} else {
    // print("No backup images available for this server");
}

// --- Monitor Rebuild Progress ---
// The following section demonstrates how to monitor rebuild progress
// Uncomment when you uncomment the install_image call above
/*
print("Monitoring server status during rebuild...");
print("Note: Server rebuild typically takes 1-3 minutes to complete.");
print("");

// Poll server status every 5 seconds to monitor progress
let max_attempts = 60; // Maximum 5 minutes of polling
let attempt = 0;
let rebuild_seen = false;
let running_count = 0;

while attempt < max_attempts {
    let current_server = client.get_server(server_id);
    let status = current_server.status; // Use status directly

    print(`Attempt ${attempt + 1}: Server status is '${status}'`);

    // Check for rebuilding status (case-insensitive)
    if status == "Rebuilding" || status == "rebuilding" {
        rebuild_seen = true;
        print("   → Server is currently being rebuilt...");
    } else if status == "Off" || status == "off" {
        print("   → Server is powered off (normal during rebuild)");
    } else if status == "Running" || status == "running" {
        if rebuild_seen {
            print("");
            print("🎉 Server rebuild completed successfully!");
            print(`✅ Server is now running with image: ${current_server.image.name}`);

            // Verify the image changed
            if current_server.image.name == "ubuntu-22.04" || current_server.image.name == "Ubuntu 22.04" {
                print("✅ Image verification: Ubuntu 22.04 installation confirmed!");
            } else {
                print(`⚠️  Image verification: Expected 'ubuntu-22.04', got '${current_server.image.name}'`);
            }
            break; // Exit immediately after rebuild completion
        } else {
            print("   → Server is running (waiting for rebuild to start...)");
        }
    } else {
        print(`   → Server status: ${status}`);
    }

    attempt = attempt + 1;

    if attempt < max_attempts {
        print("   Waiting 5 seconds before next check...");
        sleep(5); // Wait 5 seconds before polling again
    }
}

if attempt >= max_attempts {
    print("");
    print("⚠️  Timeout: Server rebuild is taking longer than expected.");
    print("   Check the Hetzner Cloud console for current status.");
}

print("");
print("💡 Tip: You can also monitor rebuild progress in the Hetzner Cloud console.");
*/

print("");
print("To use this example:");
print("1. Replace server_id with your actual server ID");
print("2. Uncomment the install_image call and monitoring section");
print("3. Run the script to rebuild your server");
print("");
print("⚠️  Remember: install_image will DESTROY ALL DATA on the target server!");