package controller

import (
	"context"
	"strings"

	"k8s.io/apimachinery/pkg/runtime"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/client"

	v1alpha1 "git.unkin.net/unkin/kea-operator/api/v1alpha1"
)

// KeaClientClassReconciler validates KeaClientClass CRs and maintains status.
type KeaClientClassReconciler struct {
	client.Client
	Scheme *runtime.Scheme
}

// +kubebuilder:rbac:groups=kea.unkin.net,resources=keaclientclasses,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=kea.unkin.net,resources=keaclientclasses/status,verbs=get;update;patch

func (r *KeaClientClassReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) {
	var cc v1alpha1.KeaClientClass
	if err := r.Get(ctx, req.NamespacedName, &cc); err != nil {
		return ctrl.Result{}, client.IgnoreNotFound(err)
	}

	if cc.Spec.Test == "" && len(cc.Spec.ArchHex) == 0 {
		cc.Status.Phase = "Invalid"
		setReady(&cc.Status.Conditions, cc.Generation, false, "NoMatch", "either test or archHex must be set")
		_ = r.Status().Update(ctx, &cc)
		return ctrl.Result{}, nil
	}
	for _, a := range cc.Spec.ArchHex {
		if !strings.HasPrefix(a, "0x") {
			cc.Status.Phase = "Invalid"
			setReady(&cc.Status.Conditions, cc.Generation, false, "BadArch", "archHex values must be 0x-prefixed, e.g. 0x0007")
			_ = r.Status().Update(ctx, &cc)
			return ctrl.Result{}, nil
		}
	}

	cc.Status.Phase = "Ready"
	cc.Status.ObservedGeneration = cc.Generation
	setReady(&cc.Status.Conditions, cc.Generation, true, "Validated", "client class accepted")
	if err := r.Status().Update(ctx, &cc); err != nil {
		return ctrl.Result{}, err
	}
	return ctrl.Result{}, nil
}

func (r *KeaClientClassReconciler) SetupWithManager(mgr ctrl.Manager) error {
	return ctrl.NewControllerManagedBy(mgr).
		For(&v1alpha1.KeaClientClass{}).
		Complete(r)
}