//! k8shost Controllers
//!
//! This binary runs the UltraCloud integration controllers for k8shost:
//! - FiberLB Controller: Manages LoadBalancer services
//! - FlashDNS Controller: Manages Service DNS records
//! - IAM Webhook: Handles TokenReview authentication
//!
//! Each controller follows the watch-reconcile pattern:
//! 1. Watch k8s API for resource changes
//! 2. Reconcile desired state with UltraCloud components
//! 3. Update k8s resource status

use anyhow::Result;
use tracing::info;

#[tokio::main]
async fn main() -> Result<()> {
    tracing_subscriber::fmt::init();

    info!("k8shost controllers starting");

    // TODO: Initialize controllers
    // 1. FiberLB controller - watch Service resources with type=LoadBalancer
    // 2. FlashDNS controller - watch Service resources for DNS sync
    // 3. IAM webhook server - handle TokenReview requests

    // Start controller loops
    tokio::select! {
        result = fiberlb_controller() => {
            info!("FiberLB controller exited: {:?}", result);
        }
        result = flashdns_controller() => {
            info!("FlashDNS controller exited: {:?}", result);
        }
        result = iam_webhook_server() => {
            info!("IAM webhook server exited: {:?}", result);
        }
    }

    Ok(())
}

async fn fiberlb_controller() -> Result<()> {
    // TODO: Implement FiberLB controller
    // 1. Watch Service resources (type=LoadBalancer)
    // 2. Allocate external IP from FiberLB
    // 3. Configure load balancer backend pool
    // 4. Update Service.status.loadBalancer.ingress

    info!("FiberLB controller not yet implemented");
    tokio::time::sleep(tokio::time::Duration::from_secs(3600)).await;
    Ok(())
}

async fn flashdns_controller() -> Result<()> {
    // TODO: Implement FlashDNS controller
    // 1. Watch Service resources
    // 2. Create/update DNS records in FlashDNS
    //    - <service>.<namespace>.svc.cluster.local -> ClusterIP
    //    - <service>.<namespace>.<project>.plasma.cloud -> ExternalIP (if LoadBalancer)
    // 3. Handle service deletion (cleanup DNS records)

    info!("FlashDNS controller not yet implemented");
    tokio::time::sleep(tokio::time::Duration::from_secs(3600)).await;
    Ok(())
}

async fn iam_webhook_server() -> Result<()> {
    // TODO: Implement IAM webhook server
    // 1. Start HTTPS server on port 8443
    // 2. Handle TokenReview requests from k8s API server
    // 3. Validate bearer tokens with IAM service
    // 4. Return UserInfo with org_id, project_id, groups
    // 5. Map IAM roles to k8s RBAC groups

    info!("IAM webhook server not yet implemented");
    tokio::time::sleep(tokio::time::Duration::from_secs(3600)).await;
    Ok(())
}
